chore: removed unused files

Added functionality of the signals ctrl+d, ctrl+c and ctr+\

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "tests/42_minishell_tester"]
+	path = tests/42_minishell_tester
+	url = https://github.com/zstenger93/42_minishell_tester.git

AGENTS.md

@@ -1,35 +0,0 @@
-# Repository Guidelines
-
-## Project Structure & Module Organization
-- `src/` holds the shell implementation, with submodules for `builtins/`, `executor/`, `parser/`, and `variables/`.
-- `include/` contains public headers used across modules.
-- `lib/` is populated at build time with third-party 42 libraries (libft, get_next_line, ft_printf, ft_args).
-- `docs/` stores project references and manual test notes (see `docs/tests.md`).
-- `build/` is the object output directory generated by `make`.
-
-## Build, Test, and Development Commands
-- `make` or `make all`: build `minishell` (auto-clones required libs into `lib/`).
-- `make clean`: remove objects in `build/`.
-- `make fclean`: remove objects and the `minishell` binary (also cleans libs).
-- `make re`: full rebuild.
-- `./minishell`: run locally after a build.
-- `make DEBUG=lldb` or `make DEBUG=valgrind` or `make DEBUG=address`: rebuild with debug/ASan-friendly flags.
-
-## Coding Style & Naming Conventions
-- The codebase follows 42 **Norminette v4** rules. Run `norminette *.c *.h` (or on specific files) before submitting changes.
-- Keep file names lowercase with underscores (e.g., `src/builtins/echo/echo.c`).
-- Keep headers in `include/` and expose only what modules need.
-
-## Testing Guidelines
-- There is no automated test runner. Use manual checks in `docs/tests.md` and basic shell behavior checks (pipes, redirects, builtins).
-- When debugging memory issues, run under valgrind and use the suppression file in `valgrind/readline.supp`.
-
-## Commit & Pull Request Guidelines
-- Commit messages in this repo use a simple `type: summary` format (examples: `update: ...`, `fix: ...`). Keep summaries short and specific.
-- For PRs, include:
-  1. What changed and why.
-  2. How to test (commands or manual steps).
-  3. Notes on any parser/executor/builtin behavior changes.
-
-## Configuration Tips
-- The project depends on `readline`; ensure your system has `libreadline-dev` or equivalent before building.

Makefile

@@ -3,10 +3,10 @@
 #                                                         :::      ::::::::    #
 #    Makefile                                           :+:      :+:    :+:    #
 #                                                     +:+ +:+         +:+      #
-#    By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+         #
+#    By: marcnava <marcnava@student.42madrid.com    +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2025/07/30 20:22:21 by sede-san          #+#    #+#              #
-#    Updated: 2026/02/05 21:06:52 by sede-san         ###   ########.fr        #
+#    Updated: 2026/02/09 22:44:34 by marcnava         ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -17,7 +17,7 @@ NAME	= minishell
 # ************************** Compilation variables *************************** #
 
 CC		= cc
-CFLAGS	= -Wall -Wextra -Werror
+CFLAGS	= -Wall -Wextra #-Werror
 HEADERS	= -I $(INCLUDE_PATH) $(LIBS_INCLUDE)
 
 ifeq ($(DEBUG), lldb) # debug with LLDB

README.md

@@ -1,3 +1,4 @@
+<!-- *This project has been made by sede-san and padan-pe* -->
 <div align="center">
 
   <!-- Project badge -->
@@ -30,7 +31,21 @@
 
 > The purpose of this project is to create a simple bash-like shell.
 
-DETAILED INFO
+**minishell** is a minimal bash-like shell implementation written in C. It provides essential shell functionality including command execution, piping, input/output redirection, and built-in commands.
+
+### Key Features
+
+- **Command Execution**: Execute external programs with argument parsing and path resolution.
+- **Pipelines**: Connect multiple commands using the pipe operator (`|`).
+- **Redirections**: Support for input (`<`), output (`>`), and append (`>>`) file redirections.
+- **Built-in Commands**: `cd`, `echo`, `env`, `exit`, `export`, `pwd`, `unset`.
+- **Environment Variables**: Access and manage shell environment variables.
+- **Interactive Shell**: Read-Evaluate-Print Loop (REPL) powered by GNU Readline.
+- **Quote Handling**: Proper handling of single and double quotes for literal strings.
+
+### Development
+
+The codebase adheres to **Norminette v4** standards and uses a modular architecture separating parsing, execution, and built-in command logic. Build artifacts are automatically generated; refer to `AGENTS.md` for detailed development guidelines.
 
 For detailed info, refer to this project [subject](docs/en.subject.pdf).
 
@@ -88,7 +103,20 @@ For detailed info, refer to this project [subject](docs/en.subject.pdf).
 
 ### Basic Usage
 
-INSTRUCTIONS
+1. **Execute the shell**
+
+```bash
+./minishell
+```
+
+2. **Interact with it like if it was bash**
+```bash
+echo "Hello, World!"
+...
+cat groceries.txt | grep tomatoes
+...
+echo "Greetings $USER!" > greetings.txt
+```
 
 ## 📏 Norminette
 

docs/defensa_resumen_es.md

@@ -1,77 +0,0 @@
-# Minishell - Resumen para defensa
-
-Este documento es un guion breve para explicar el proyecto con claridad.
-
-## 1. Que es minishell
-- Un shell interactivo basico: lee comandos, los parsea y los ejecuta.
-- Objetivo didactico: procesos, pipes, fds, señales y parsing.
-
-## 2. Flujo general (en 20 segundos)
-1. Prompt con readline.
-2. Lexer divide la linea en tokens validos (respetando comillas).
-3. Parser crea comandos, argv y redirecciones.
-4. Expansion de variables ($VAR, $?).
-5. Resolver PATH.
-6. Ejecutar con fork/execve y pipes.
-7. Actualizar exit status.
-
-## 3. Puntos clave que suelen preguntar
-
-### Comillas
-- Comilla simple: todo literal, no expansion.
-- Comilla doble: expansion de $VAR, pero no metacaracteres.
-- Si una comilla no se cierra: error y no se ejecuta nada.
-
-### Redirecciones
-- <, >, >>, <<.
-- Se resuelven antes de ejecutar el comando.
-- Heredoc: lectura hasta delimitador, sin historial.
-
-### Pipes
-- Conecto stdout del comando i con stdin del comando i+1.
-- Uso pipe() y dup2() en el child.
-- El padre cierra fds que no usa.
-
-### Builtins
-- echo -n, cd, pwd, export, unset, env, exit.
-- Si no hay pipeline, se ejecutan en el padre para afectar el estado.
-- En pipeline, se ejecutan en el child.
-
-### Variables
-- $VAR: entorno.
-- $?: ultimo exit status.
-
-### Senales
-- Una sola variable global para la senal.
-- ctrl-C: nueva linea y prompt.
-- ctrl-D: salir del shell.
-- ctrl-\: no hace nada.
-
-## 4. Ejemplos rapidos para demostrar
-
-1. Pipes
-- `ls | wc -l`
-
-2. Redirecciones
-- `echo hola > out.txt`
-- `cat < out.txt`
-
-3. Heredoc
-- `cat << EOF`
-- escribir lineas
-- `EOF`
-
-4. Expansion
-- `echo $HOME`
-- `echo $?`
-
-## 5. Errores y robustez
-- No ejecuto si hay errores de parseo.
-- Mensajes con perror cuando fallan syscalls.
-- exit_status siempre actualizado.
-
-## 6. Mensajes finales recomendados
-- "He separado parsing y ejecucion para que el codigo sea mantenible y
-  la defensa mas clara".
-- "Sigo el comportamiento de bash como referencia".
-

docs/guia_obligatoria_es.md

@@ -1,292 +0,0 @@
-# Minishell - Guia de estructura y pasos (parte obligatoria)
-
-Objetivo de este documento
-- Proponer una estructura de archivos y datos.
-- Describir el proceso paso a paso como tutorial.
-- Servir de guion para defensa (explicaciones claras y ordenadas).
-
-Este documento no implementa nada. Solo define el plan y el por que.
-
----
-
-## 1. Vision general del flujo
-
-El shell se puede explicar como una tuberia de fases:
-1. Lectura interactiva (prompt + historial).
-2. Tokenizacion (lexing) con comillas y metacaracteres.
-3. Parseo (construccion de comandos, redirecciones, pipes).
-4. Expansion de variables ($VAR y $?).
-5. Preparacion de ejecucion (resolucion de rutas, heredoc).
-6. Ejecucion (builtins o execve) con pipes y redirecciones.
-7. Gestion de exit status y señales.
-
-Esta separacion permite explicar en defensa cada pieza por separado y justificar
-las decisiones tecnicas.
-
----
-
-## 2. Propuesta de estructuras de datos
-
-Estas estructuras son solo guia. Adapta nombres a tu estilo y Norminette.
-
-### 2.1 Token (lexer)
-Representa una unidad del input (palabra, pipe, redireccion, etc.).
-
-- enum e_tokentype
-  - TOK_WORD
-  - TOK_PIPE
-  - TOK_REDIR_IN (<)
-  - TOK_REDIR_OUT (>)
-  - TOK_REDIR_APPEND (>>)
-  - TOK_HEREDOC (<<)
-
-- struct s_token
-  - char *text
-  - t_tokentype type
-  - struct s_token *next
-
-Uso en defensa: el lexer separa el input en unidades, respetando comillas.
-
-### 2.2 Redireccion
-Guarda los datos de redireccion por comando.
-
-- enum e_redirtype
-  - REDIR_IN
-  - REDIR_OUT
-  - REDIR_APPEND
-  - REDIR_HEREDOC
-
-- struct s_redir
-  - t_redirtype type
-  - char *target
-  - int fd
-  - struct s_redir *next
-
-Notas:
-- target es el filename o delimitador de heredoc.
-- fd se resuelve en fase de preparacion (open o pipe temporal).
-
-### 2.3 Comando
-
-- struct s_command
-  - char **argv
-  - int argc
-  - char *path
-  - t_redir *redirs
-
-### 2.4 Pipeline
-Una lista de comandos en orden, unidos por pipes.
-
-- struct s_pipeline
-  - t_command **cmds
-  - size_t count
-
-
----
-
-## 3. Lexer: reglas y pasos
-
-Reglas clave del subject:
-- No interpretar comillas sin cerrar.
-- Comilla simple: no se expanden variables ni metacaracteres.
-- Comilla doble: se expanden variables, pero se respetan caracteres normales.
-- Metacaracteres: |, <, >, <<, >> separan tokens.
-
-Pasos recomendados:
-1. Recorrer la linea caracter a caracter.
-2. Mantener estado: in_single, in_double.
-3. Cuando no estas en comillas, detectar metacaracteres y cortar tokens.
-4. Construir TOK_WORD con el texto exacto (sin eliminar comillas aun).
-5. Si llegas a fin de linea con in_single o in_double activo, error de parseo.
-
-Explicacion para defensa:
-- El lexer no sabe de ejecucion, solo separa en tokens validos.
-- El manejo de comillas se hace aqui para respetar la sintaxis del shell.
-
----
-
-## 4. Parser: construccion de comandos
-
-Objetivo: transformar tokens en una estructura ejecutable.
-
-Pasos:
-1. Recorrer lista de tokens.
-2. Cada TOK_PIPE cierra un comando actual y abre el siguiente.
-3. TOK_WORD se agrega a argv.
-4. TOK_REDIR_* consume el siguiente token (debe ser TOK_WORD) como target.
-5. Construir lista de redirecciones para cada comando.
-6. Validar errores: pipe inicial/final, redireccion sin target, etc.
-
-Explicacion para defensa:
-- El parser aplica reglas de orden y construye una estructura clara.
-- Separar argv y redirecciones evita mezclar logica en executor.
-
----
-
-## 5. Expansion de variables
-
-Reglas:
-- $VAR se sustituye por getenv/tabla interna.
-- $? se sustituye por el exit_status anterior.
-- En comilla simple no se expande.
-- En comilla doble si se expande.
-
-Proceso recomendado:
-1. Durante tokenizacion, guardar el texto con sus comillas o bien
-   marcar segmentos con estado de comillas.
-2. En expansion, recorrer cada palabra y reemplazar $...
-3. Si variable no existe, reemplazar por string vacio.
-4. Eliminar comillas despues de la expansion.
-
-Explicacion para defensa:
-- La expansion es una fase separada para no complicar el parser.
-- $?, variable especial, refleja el estado de la ultima ejecucion.
-
----
-
-## 6. Redirecciones y heredoc
-
-Redirecciones basicas:
-- <: open(file, O_RDONLY)
-- >: open(file, O_WRONLY | O_CREAT | O_TRUNC)
-- >>: open(file, O_WRONLY | O_CREAT | O_APPEND)
-
-Heredoc (<<):
-1. Leer lineas hasta delimitador exacto.
-2. Guardar el contenido en un pipe o fichero temporal.
-3. Usar el extremo de lectura como STDIN del comando.
-4. No guardar el contenido en historial.
-
-Explicacion para defensa:
-- Las redirecciones se resuelven antes de ejecutar el proceso.
-- Heredoc es una fuente especial de entrada.
-
----
-
-## 7. Resolucion de comandos y PATH
-
-Reglas:
-- Si argv[0] es una ruta absoluta o relativa (/, ./, ../), usarla tal cual.
-- Si no, buscar en PATH separando por ':'.
-- Si es builtin, no se necesita path real.
-
-Proceso:
-1. Detectar builtin.
-2. Si no builtin y no es ruta, recorrer PATH y usar access().
-3. Guardar path en t_command->path.
-
----
-
-## 8. Ejecucion
-
-Caso 1: comando unico builtin
-- Ejecutar en el proceso padre para que pueda modificar estado del shell
-  (ej: cd, export, unset, exit).
-
-Caso 2: pipeline o comando externo
-- Usar fork + execve.
-- Crear pipes entre comandos.
-- Aplicar redirecciones antes de ejecutar.
-
-Proceso para pipeline:
-1. Para cada comando, crear pipe si hay siguiente.
-2. fork.
-3. En child: dup2 para redirecciones y pipes, luego ejecutar.
-4. En parent: cerrar FDs innecesarios y seguir.
-5. Esperar procesos, guardar exit status del ultimo comando.
-
-Explicacion para defensa:
-- Las pipes conectan stdout del comando i con stdin del comando i+1.
-- Los builtins dentro de pipeline se ejecutan en child.
-
----
-
-## 9. Builtins obligatorios
-
-- echo con -n
-- cd (ruta relativa o absoluta)
-- pwd
-- export (sin opciones)
-- unset (sin opciones)
-- env (sin opciones o argumentos)
-- exit
-
-Notas de defensa:
-- export/unset trabajan sobre la tabla de variables del shell.
-- env imprime variables de entorno.
-- exit debe actualizar exit_status y terminar el loop principal.
-
----
-
-## 10. Senales
-
-Requisitos interactivos:
-- ctrl-C: imprime nueva linea y muestra prompt.
-- ctrl-D: termina el shell.
-- ctrl-\: no hace nada.
-
-Regla del subject:
-- Solo una variable global para indicar la senal recibida.
-
-Proceso:
-1. Definir una variable global int g_signal.
-2. Configurar handlers con sigaction.
-3. En handler: actualizar g_signal y escribir un '\n' si procede.
-4. En el loop principal: si g_signal indica SIGINT, resetear lineas de readline.
-
----
-
-## 11. Manejo de errores y salida
-
-- Mostrar errores con perror o mensajes consistentes.
-- Si parseo falla, no ejecutar nada.
-- Mantener exit_status actualizado.
-
-Explicacion en defensa:
-- Un shell robusto evita ejecutar comandos parcialmente parseados.
-- exit_status es clave para $?.
-
----
-
-## 12. Checklist para defensa (guion rapido)
-
-1. Explico el flujo completo: lectura -> lexer -> parser -> expansion -> exec.
-2. Explico como manejo comillas y metacaracteres.
-3. Explico como construyo argv y redirecciones.
-4. Explico expansion de $VAR y $?.
-5. Explico pipes y redirecciones con dup2.
-6. Explico por que los builtins se ejecutan en parent o child.
-7. Explico manejo de senales y la variable global unica.
-8. Explico exit_status y comportamiento de $?.
-
----
-
-## 13. Sugerencia de estructura de archivos
-
-- include/
-  - minishell.h
-  - core.h (estructuras globales y estado)
-  - parser.h (tokens, parser)
-  - executor.h
-  - builtins.h
-
-- src/
-  - core/ (init, signals, util)
-  - parser/ (lexer.c, parser.c, expand.c)
-  - executor/ (executor.c, redirs.c)
-  - builtins/ (echo, cd, pwd, exit, env, export, unset)
-  - variables/ (environment.c)
-  - minishell.c (loop principal)
-  - main.c
-
-Esto es solo una guia; no es obligatorio seguirla al pie de la letra.
-
----
-
-## 14. Consejos para la defensa
-
-- Usa bash como referencia de comportamiento.
-- Demuestra un par de ejemplos: pipe, redireccion y expansion.
-- Si algo falla, explica que el parser previene ejecucion parcial.
-- Recalca el manejo correcto de ctrl-C y ctrl-\.
-

docs/tests.md

@@ -1,17 +0,0 @@
-### Multiple redirections
-
-```
-cmd > file1 > file2
-```
-or
-```
-cmd >> file1 >> file2
-```
-
-Should create both `file1` and `file2` but store the output in `file2`
-
-### Environment variables
-
-#### SHLVL
-
-Must be increased by 1 if executed from any other shell or 1 if executed 

executor_new_previous.c

@@ -1,341 +0,0 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   executor_new.c                                     :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2025/10/28 13:03:44 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/08 19:05:37 by sede-san         ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
-
-#include "executor.h"
-#include "builtins.h"
-#include <stdint.h>
-#include <errno.h>
-
-static void handle_execve_error();
-static void handle_parent_process(
-	int *prev_read_fd,
-	t_list *current_command,
-	int pipefd[2]
-);
-static int handle_pipeline(
-	t_list *current_command,
-	int pipefd[2],
-	int *exit_status
-);
-static inline uint8_t	execute_builtin(
-	t_command *command,
-	t_minishell *minishell
-);
-static void	execute_external_command(
-	t_command *command,
-	t_minishell *minishell
-);
-static pid_t handle_fork(
-	t_list *current_command,
-	t_minishell *minishell
-);
-static uint8_t execute_command(
-	t_command *command,
-	t_minishell *minishell
-);
-
-static inline bool		can_execute_command(t_command *command, t_minishell *minishell);
-static inline bool		command_exists(t_command *command, t_minishell *minishell);
-static void			cmdfree(t_command *command);
-static void			cmdfree_argv(char **argv);
-
-# define WRITE_PIPE 1
-# define READ_PIPE 0
-# define CHILD_PID 0
-
-u_int8_t	execute(
-	t_list *command_list,
-	t_minishell *minishell
-) {
-	t_list	*current_command;
-	int		prev_read_fd;
-	int		exit_status;
-	int		pipefd[2];
-	pid_t	pid;
-
-
-	prev_read_fd = -1;
-	exit_status = EXIT_SUCCESS;
-	current_command = command_list;
-	while (current_command != NULL)
-	{
-		if (handle_pipeline(current_command, pipefd, &exit_status) == EXIT_FAILURE)
-			break ;
-		pid = handle_fork(current_command, minishell);
-		if (pid == -1)
-		{
-			perror("fork");
-			exit_status = EXIT_FAILURE;
-			break ;
-		}
-		if (pid == CHILD_PID)
-			handle_child_process(prev_read_fd, current_command, pipefd, minishell);
-		handle_parent_process(&prev_read_fd, current_command, pipefd);
-		current_command = current_command->next;
-	}
-	ft_lstclear(&command_list, (void (*)(void *))cmdfree);
-	while (wait(&exit_status) > 0)
-	{
-		if (WIFEXITED(exit_status))
-			exit_status = WEXITSTATUS(exit_status);
-	}
-	return (exit_status);
-}
-
-static int handle_pipeline(
-	t_list *current_command,
-	int pipefd[2],
-	int *exit_status
-) {
-	if (current_command->next) // create pipe if needed
-	{
-		if (pipe(pipefd) == -1)
-		{
-			perror("pipe");
-			*exit_status = EXIT_FAILURE;
-			return (EXIT_FAILURE);
-		}
-	}
-	return (EXIT_SUCCESS);
-}
-
-static void handle_parent_process(
-	int *prev_read_fd,
-	t_list *current_command,
-	int pipefd[2]
-) {
-	if (*prev_read_fd != -1)
-		close(*prev_read_fd);
-	if (current_command->next)
-	{
-		close(pipefd[WRITE_PIPE]); // parent does not write
-		*prev_read_fd = pipefd[READ_PIPE]; // pass read end forward
-	}
-	else
-		*prev_read_fd = -1;
-}
-
-static pid_t handle_fork(
-	t_list *current_command,
-	t_minishell *minishell
-) {
-	pid_t	pid;
-	const t_command *command = (t_command *)current_command->content;
-
-	pid = 0;
-	if (current_command->next != NULL
-		|| !is_builtin(command->path, minishell))
-		pid = fork();
-	return (pid);
-}
-
-void handle_child_process(int prev_read_fd, t_list *current_command, int pipefd[2], t_minishell *minishell)
-{
-	redirect_pipes(prev_read_fd, current_command, pipefd);
-	execute_command((t_command *)current_command->content, minishell);
-}
-
-void redirect_pipes(int prev_read_fd, t_list *current_command, int pipefd[2])
-{
-	redirect_input_pipe(prev_read_fd);
-	redirect_output_pipe(current_command, pipefd);
-}
-
-void redirect_output_pipe(t_list * current_command, int  pipefd[2])
-{
-	if (current_command->next)
-	{
-		dup2(pipefd[WRITE_PIPE], STDOUT_FILENO);
-		close(pipefd[READ_PIPE]);
-		close(pipefd[WRITE_PIPE]);
-	}
-}
-
-void redirect_input_pipe(int prev_read_fd)
-{
-	if (prev_read_fd != -1)
-	{
-		dup2(prev_read_fd, STDIN_FILENO);
-		close(prev_read_fd);
-	}
-}
-
-static inline bool	can_execute_command(
-	t_command *command,
-	t_minishell *minishell
-) {
-	if (!is_builtin(command->path, minishell)
-		&& access(command->path, X_OK) != EXIT_SUCCESS)
-		return (false);
-	return (true);
-}
-
-static inline bool	command_exists(
-	t_command *command,
-	t_minishell *minishell
-) {
-	if (!is_builtin(command->path, minishell)
-		&& access(command->path, F_OK) != EXIT_SUCCESS)
-		return (false);
-	return (true);
-}
-
-static uint8_t execute_command(
-	t_command *command,
-	t_minishell *minishell
-) {
-	if (is_builtin(command->path, minishell))
-		return (execute_builtin(command, minishell));
-	else
-	{
-		execute_external_command(command, minishell);
-		return (EXIT_FAILURE); //! should never reach here
-	}
-}
-
-static inline uint8_t	execute_builtin(
-	t_command *command,
-	t_minishell *minishell
-) {
-	const t_builtin_func	builtin 
-		= ft_hashmap_get(minishell->builtins, command->path);
-
-	return (builtin(*command, minishell));
-}
-
-static void	execute_external_command(
-	t_command *command,
-	t_minishell *minishell
-) {
-	char	**envp;
-
-	envp = get_envp(minishell);
-	if (envp == NULL)
-	{
-		perror("get_envp");
-		exit(EXIT_FAILURE);
-	}
-	execve(command->path, command->argv, envp);
-	handle_execve_error();
-}
-
-static void handle_execve_error() {
-	perror("execve");
-	exit(EXIT_FAILURE);
-}
-
-// static inline bool	is_piped(
-// 	t_command *command
-// ) {
-// 	return (command->piped_to != NULL || command->piped_from != NULL);
-// }
-
-// static u_int8_t handle_child_process(
-// 	t_command *command,
-// 	t_minishell *minishell
-// ) {
-// 	if (!redirect_pipes(command))
-// 		exit(EXIT_FAILURE);
-// 	execute_command(command, minishell);
-// 	exit(EXIT_FAILURE);
-// }
-
-// static int redirect_pipe(
-// 	int from,
-// 	int to
-// ) {
-// 	if (dup2(from, to) == -1)
-// 		return (-1);
-// 	close(from);
-// 	return (0);
-// }
-
-// static int redirect_pipes(
-// 	t_command *command
-// ) {
-// 	if (command->piped_from &&
-// 		redirect_pipe(command->piped_from->outfile, STDIN_FILENO) == -1)
-// 	{
-// 		perror("dup2");
-// 		return (0);
-// 	}
-// 	if (command->piped_to &&
-// 		redirect_pipe(command->outfile, STDOUT_FILENO) == -1)
-// 	{
-// 		perror("dup2");
-// 		return (0);
-// 	}
-// 	return (1);
-// }
-
-// static void	show_error(
-// 	t_command *command,
-// 	t_minishell *minishell
-// ) {
-// 	if (!command_exists(command, minishell))
-// 	{
-// 		ft_eprintf("minishell: %s: command not found\n", command->argv[0]);
-// 		minishell->exit_status = 127;
-// 	}
-// 	else if (!can_execute_command(command, minishell))
-// 	{
-// 		ft_eprintf("minishell: %s: %s\n", command->path, strerror(errno));
-// 		minishell->exit_status = errno;
-// 	}
-// }
-
-static void	cmdfree(
-	t_command *command
-) {
-	if (command == NULL)
-		return ;
-	cmdfree_argv(command->argv);
-	free(command->path);
-	free(command);
-}
-
-static void	cmdfree_argv(
-	char **argv
-) {
-	size_t	i;
-
-	if (argv == NULL)
-		return ;
-	i = 0;
-	while (argv[i] != NULL)
-	{
-		free(argv[i]);
-		i++;
-	}
-	free(argv);
-}
-
-// static void debug_print_command_info(
-// 	t_command *command
-// ) {
-// 	size_t	i;
-
-// 	if (command == NULL)
-// 	{
-// 		printf("Command is NULL\n");
-// 		return ;
-// 	}
-// 	printf("Command info:\n");
-// 	printf("  Path: %s\n", command->path);
-// 	printf("  Argc: %d\n", command->argc);
-// 	printf("  Argv:\n");
-// 	for (i = 0; i < (size_t)command->argc; i++)
-// 		printf("    arg[%zu]: %s\n", i, command->argv[i]);
-// 	printf("  Infile FD: %d\n", command->infile);
-// 	printf("  Outfile FD: %d\n", command->outfile);
-// 	printf("--------------------------\n");
-// }

executor_old.c

@@ -1,256 +0,0 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   executor.c                                         :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2025/10/28 13:03:44 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/08 03:42:11 by sede-san         ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
-
-#include "executor.h"
-#include "builtins.h"
-#include <errno.h>
-
-static inline bool		can_execute_command(t_command *command, t_minishell *minishell);
-static inline bool		command_exists(t_command *command, t_minishell *minishell);
-static u_int8_t		execute_command(t_command *command, t_minishell *minishell);
-static u_int8_t		execute_command(t_command *command, t_minishell *minishell);
-// static inline bool		is_piped(t_command *command);
-static void			cmdfree(t_command *command);
-static void			cmdfree_argv(char **argv);
-
-# define WRITE_PIPE 1
-# define READ_PIPE 0
-# define CHILD_PID 0
-
-u_int8_t	execute(
-	t_list *command_list,
-	t_minishell *minishell
-) {
-	t_list		*current_command;
-	int			prev_read_fd;
-	pid_t		pid;
-	u_int8_t	exit_status;
-	int			child_exit_status;
-
-	prev_read_fd = -1;
-	exit_status = EXIT_SUCCESS;
-	current_command = command_list;
-	while (current_command != NULL)
-	{
-		t_command *command = (t_command *)current_command->content;
-		int pipefd[2];
-
-		/* Create pipe ONLY if there is a next command */
-		if (current_command->next)
-		{
-			if (pipe(pipefd) == -1)
-			{
-				perror("pipe");
-                exit_status = EXIT_FAILURE;
-                break ;
-			}
-		}
-
-        // create fork
-		pid = 0;
-		if (current_command->next != NULL
-            || !is_builtin(command->path, minishell))
-		    pid = fork();
-        // handle fork error
-		if (pid == -1)
-		{
-			perror("fork");
-			return (EXIT_FAILURE);
-		}
-
-        // handle child process
-		if (pid == CHILD_PID)
-		{
-			/* If we have input from previous pipe */
-			if (prev_read_fd != -1)
-			{
-				dup2(prev_read_fd, STDIN_FILENO);
-				close(prev_read_fd);
-			}
-			/* If we pipe output to next command */
-			if (current_command->next)
-			{
-				dup2(pipefd[WRITE_PIPE], STDOUT_FILENO);
-				close(pipefd[READ_PIPE]);
-				close(pipefd[WRITE_PIPE]);
-			}
-			execute_command(command, minishell); // child process exits here
-		}
-
-        // handle parent process
-        waitpid(pid, &child_exit_status, 0); // wait for child to finish
-		if (prev_read_fd != -1)
-			close(prev_read_fd);
-
-		if (current_command->next)
-		{
-			close(pipefd[WRITE_PIPE]);          /* parent does not write */
-			prev_read_fd = pipefd[READ_PIPE];  /* pass read end forward */
-		}
-		else
-			prev_read_fd = -1;
-
-        // continue executing
-		current_command = current_command->next;
-	}
-	ft_lstclear(&command_list, (void (*)(void *))cmdfree);
-    exit_status = child_exit_status;
-	return (exit_status);
-}
-
-static inline bool	can_execute_command(
-	t_command *command,
-	t_minishell *minishell
-) {
-	if (!is_builtin(command->path, minishell)
-		&& access(command->path, X_OK) != EXIT_SUCCESS)
-		return (false);
-	return (true);
-}
-
-static inline bool	command_exists(
-	t_command *command,
-	t_minishell *minishell
-) {
-	if (!is_builtin(command->path, minishell)
-		&& access(command->path, F_OK) != EXIT_SUCCESS)
-		return (false);
-	return (true);
-}
-
-static u_int8_t execute_command(
-	t_command *command,
-	t_minishell *minishell
-)
-{
-	char			**envp;
-	t_builtin_func	builtin;
-
-	if (is_builtin(command->path, minishell))
-	{
-		builtin = ft_hashmap_get(minishell->builtins, command->path);
-		return (builtin(*command, minishell));
-	}
-	envp = get_envp(minishell);
-	execve(command->path, command->argv, envp);
-    // handle error if execve fails
-	perror("execve");
-	free_envp(envp);
-	exit(EXIT_FAILURE);
-}
-
-// static inline bool	is_piped(
-// 	t_command *command
-// ) {
-// 	return (command->piped_to != NULL || command->piped_from != NULL);
-// }
-
-// static u_int8_t handle_child_process(
-// 	t_command *command,
-// 	t_minishell *minishell
-// ) {
-// 	if (!redirect_pipes(command))
-// 		exit(EXIT_FAILURE);
-// 	execute_command(command, minishell);
-// 	exit(EXIT_FAILURE);
-// }
-
-// static int redirect_pipe(
-// 	int from,
-// 	int to
-// ) {
-// 	if (dup2(from, to) == -1)
-// 		return (-1);
-// 	close(from);
-// 	return (0);
-// }
-
-// static int redirect_pipes(
-// 	t_command *command
-// ) {
-// 	if (command->piped_from &&
-// 		redirect_pipe(command->piped_from->outfile, STDIN_FILENO) == -1)
-// 	{
-// 		perror("dup2");
-// 		return (0);
-// 	}
-// 	if (command->piped_to &&
-// 		redirect_pipe(command->outfile, STDOUT_FILENO) == -1)
-// 	{
-// 		perror("dup2");
-// 		return (0);
-// 	}
-// 	return (1);
-// }
-
-// static void	show_error(
-// 	t_command *command,
-// 	t_minishell *minishell
-// ) {
-// 	if (!command_exists(command, minishell))
-// 	{
-// 		ft_eprintf("minishell: %s: command not found\n", command->argv[0]);
-// 		minishell->exit_status = 127;
-// 	}
-// 	else if (!can_execute_command(command, minishell))
-// 	{
-// 		ft_eprintf("minishell: %s: %s\n", command->path, strerror(errno));
-// 		minishell->exit_status = errno;
-// 	}
-// }
-
-static void	cmdfree(
-	t_command *command
-) {
-	if (command == NULL)
-		return ;
-	cmdfree_argv(command->argv);
-	free(command->path);
-	free(command);
-}
-
-static void	cmdfree_argv(
-	char **argv
-) {
-	size_t	i;
-
-	if (argv == NULL)
-		return ;
-	i = 0;
-	while (argv[i] != NULL)
-	{
-		free(argv[i]);
-		i++;
-	}
-	free(argv);
-}
-
-// static void debug_print_command_info(
-// 	t_command *command
-// ) {
-// 	size_t	i;
-
-// 	if (command == NULL)
-// 	{
-// 		printf("Command is NULL\n");
-// 		return ;
-// 	}
-// 	printf("Command info:\n");
-// 	printf("  Path: %s\n", command->path);
-// 	printf("  Argc: %d\n", command->argc);
-// 	printf("  Argv:\n");
-// 	for (i = 0; i < (size_t)command->argc; i++)
-// 		printf("    arg[%zu]: %s\n", i, command->argv[i]);
-// 	printf("  Infile FD: %d\n", command->infile);
-// 	printf("  Outfile FD: %d\n", command->outfile);
-// 	printf("--------------------------\n");
-// }

include/builtins.h

@@ -6,7 +6,7 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/10/29 22:09:51 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/08 19:42:50 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 01:15:34 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -16,8 +16,9 @@
 # include "ft_args.h"
 # include "minishell.h"
 # include "core.h"
+# include "variables.h"
 
-typedef unsigned char   (*t_builtin_func)(t_command cmd, t_minishell *minishell);
+typedef uint8_t	(*t_builtin_func)(t_command cmd, t_minishell *minishell);
 
 /******************************************************************************/
 /*                                 Functions                                  */
@@ -25,24 +26,36 @@ typedef unsigned char   (*t_builtin_func)(t_command cmd, t_minishell *minishell)
 
 /* builtins.c */
 
-extern u_int8_t	set_builtins(t_minishell *minishell);
+extern uint8_t	set_builtins(t_minishell *minishell);
 
-extern u_int8_t	is_builtin(const char *command_name, t_minishell *minishell);
+extern uint8_t	is_builtin(const char *command_name, t_minishell *minishell);
 
 /* cd.c */
 
-extern u_int8_t	builtin_cd(t_command cmd, t_minishell *minishell);
+extern uint8_t	builtin_cd(t_command cmd, t_minishell *minishell);
 
 /* echo.c */
 
-extern u_int8_t	builtin_echo(t_command cmd, t_minishell *minishell);
+extern uint8_t	builtin_echo(t_command cmd, t_minishell *minishell);
 
 /* exit.c */
 
-extern u_int8_t	builtin_exit(t_command cmd, t_minishell *minishell);
+extern uint8_t	builtin_exit(t_command cmd, t_minishell *minishell);
 
 /* pwd.c */
 
-extern u_int8_t	builtin_pwd(t_command cmd, t_minishell *minishell);
+extern uint8_t	builtin_pwd(t_command cmd, t_minishell *minishell);
+
+/* env.c */
+
+extern uint8_t	builtin_env(t_command cmd, t_minishell *minishell);
+
+/* export.c */
+
+extern uint8_t	builtin_export(t_command cmd, t_minishell *minishell);
+
+/* unset.c */
+
+extern uint8_t	builtin_unset(t_command cmd, t_minishell *minishell);
 
 #endif /* BUILTINS_H */

include/core.h

@@ -6,7 +6,7 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/10/22 19:10:13 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/12 20:19:23 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 01:25:43 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -34,8 +34,8 @@ typedef enum e_token_type
 typedef struct s_token
 {
 	t_token_type	type;
-	char		    *value;
-}   t_token;
+	char			*value;
+}	t_token;
 
 typedef enum e_redirection_type
 {
@@ -48,8 +48,11 @@ typedef enum e_redirection_type
 typedef struct s_redirection
 {
 	t_token_type	type;
+	int				io_number;
 	char			*target;
-}   t_redirection;
+	bool			heredoc_expand;
+	bool			heredoc_ready;
+}	t_redirection;
 
 /**
  * @brief Structure that holds both environment and internal variables
@@ -63,7 +66,7 @@ typedef struct s_redirection
 typedef struct s_variables
 {
 	t_hashmap	*environment;
-	// char	**internal;
+	t_hashmap	*internal;
 }	t_variables;
 
 /**
@@ -82,12 +85,6 @@ typedef struct s_minishell
 	bool		exit;
 }	t_minishell;
 
-typedef struct	s_redirection
-{
-	t_token_type	type;
-	char			*target;
-}	t_redirection;
-
 /**
  * @brief Structure representing a single command in the shell
  *
@@ -129,6 +126,16 @@ extern void		minishell_run(t_minishell *minishell);
 
 extern void		minishell_clear(t_minishell *minishell);
 
+extern void		minishell_set_interactive_signals(void);
+
+extern void		minishell_set_execution_signals(void);
+
+extern void		minishell_set_child_signals(void);
+
+extern void		minishell_set_heredoc_signals(void);
+
+extern bool		minishell_consume_sigint(void);
+
 /* environment.c */
 
 extern void		set_envp(char **envp, t_minishell *msh);
@@ -140,6 +147,7 @@ extern char		**get_envp(t_minishell *msh);
 
 extern void		free_envp(char **envp);
 
-extern char		*get_env(const char *env_name, t_minishell *msh);
+extern void		handle_sigint_status(t_minishell *minishell);
+extern bool		handle_eof(char *line, t_minishell *minishell);
 
 #endif /* CORE_H */

include/errors.h

@@ -6,7 +6,7 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2026/02/10 22:28:01 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/10 23:24:16 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 01:11:38 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -17,7 +17,8 @@
 # include "core.h"
 # include "parser.h"
 
-extern void syntax_error_unexpected_token(t_token *token);
+extern void	syntax_error_unexpected_token(t_token *token);
 extern void	malloc_error(void);
+extern void	command_not_found_error(const char *command);
 
 #endif /* ERRORS_H */

include/executor.h

@@ -19,23 +19,46 @@
 
 # define READ_PIPE 0
 # define WRITE_PIPE 1
-
-typedef struct s_pipeline
-{
-    int prev_read_fd;
-    int pipefd[2];
-}   t_pipeline;
-
-
-/******************************************************************************/
-/*                                 Functions                                  */
-/******************************************************************************/
-
-// executor.c
-
 # define PIPE_ERROR -1
 # define FORK_ERROR -1
 
-extern uint8_t execute(t_list *command, t_minishell *minishell);
+typedef struct s_pipeline
+{
+	int	prev_read_fd;
+	int	pipefd[2];
+}	t_pipeline;
+
+typedef struct s_exec_state
+{
+	uint8_t		exit_status;
+	t_pipeline	pipeline;
+	t_list		*current_command;
+	pid_t		last_child_pid;
+}	t_exec_state;
+
+extern uint8_t	execute(t_list *command, t_minishell *minishell);
+extern uint8_t	executor_execute_command(t_command *cmd, t_minishell *msh);
+extern char		*executor_resolve_command_path(const t_command *cmd,
+					t_minishell *msh);
+extern bool		executor_is_builtin_command(const t_command *cmd,
+					t_minishell *msh);
+extern int		executor_create_pipe_if_needed(t_list *node, t_pipeline *pl);
+extern bool		executor_is_fork_required(t_list *node, const t_pipeline *pl,
+					t_minishell *msh);
+extern void		executor_setup_child_input(t_pipeline *pipeline);
+extern void		executor_setup_child_output(t_list *node, t_pipeline *pl);
+extern void		executor_child_process(t_list *node, t_pipeline *pl,
+					t_minishell *msh);
+extern void		executor_parent_cleanup(t_list *node, t_pipeline *pl);
+extern uint8_t	executor_wait_for_children(pid_t last_child_pid);
+extern void		executor_cmdfree(t_command *command);
+extern bool		executor_apply_redirections(const t_command *command,
+					int *saved_stdin, int *saved_stdout, int *saved_stderr);
+extern void		executor_restore_redirections(int saved_stdin,
+					int saved_stdout, int saved_stderr);
+extern bool		executor_prepare_heredocs(t_list *command_list,
+					t_minishell *minishell, uint8_t *exit_status);
+extern char		*executor_expand_heredoc_line(const char *line,
+					t_minishell *minishell);
 
 #endif /* EXECUTOR_H */

include/minishell.h

@@ -6,7 +6,7 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/10/20 16:35:10 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/10 22:12:58 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 15:17:38 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -15,6 +15,7 @@
 
 # include "libft.h"
 # include "ft_printf.h"
+# include "get_next_line.h"
 # include "chardefs.h"
 # include <stdbool.h>
 # include <stdint.h>
@@ -41,4 +42,6 @@
 # include <term.h>				// tgetent(3), tgetflag(3), tgetnum(3),
 								// tgetstr(3), tgoto(3), tputs(3)
 
+# define MINISHELL_VERSION "1.0.0"
+
 #endif /* MINISHELL_H */

include/parser.h

@@ -23,19 +23,31 @@
 
 // parser.c
 
-extern t_list   *parse(char *line, t_minishell *minishell);
+extern t_list		*parse(char *line, t_minishell *minishell);
 
 // lexer.c
 
-extern t_list   *lex(const char *line);
+t_token_type		get_token_type(const char *str);
+t_token				*token_new(t_token_type type, char *text);
+t_token				*read_token(t_token_type type, const char *line,
+						size_t *i);
+t_token				*read_word(const char *line, size_t *i);
 
-extern void     	token_clear(t_token *token);
+extern t_list		*lex(const char *line);
+
+extern void			token_clear(t_token *token);
 extern t_command	*command_new(t_list **tokens);
 extern void			command_clear(t_command *command);
 extern void			command_add_tokens(t_command **command, t_list **tokens);
 extern bool			is_pipe(t_token *token);
-extern bool is_redirection(t_token *token);
-void redirection_add(t_list **tokens, t_token *token, t_command **command);
-void words_add(t_list **tokens, t_command **command);
+extern bool			is_redirection(t_token *token);
+bool				parser_token_is_fd_prefix(t_list *token_node,
+						int *io_number);
+void				redirection_add_with_fd(t_list **tokens, t_token *token,
+						t_command **command, int io_number);
+void				words_add(t_list **tokens, t_command **command);
+
+void				expand(t_list **commands, t_minishell *minishell);
+void				redirection_clear(t_redirection *redirection);
 
 #endif /* PARSER_H */

include/variables.h

@@ -0,0 +1,43 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   variables.h                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:45:35 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 01:24:49 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef VARIABLES_H
+# define VARIABLES_H
+
+# include "minishell.h"
+# include "core.h"
+
+// variables.c
+
+extern char		*get_var(const char *name, t_minishell *minishell);
+extern void		set_var(const char *name, char *value, t_minishell *minishell);
+extern void		unset_var(const char *name, t_minishell *minishell);
+
+// environment.c
+
+extern char		*get_env(const char *name, t_minishell *minishell);
+extern void		set_env(const char *name, char *value, t_minishell *minishell);
+extern void		unset_env(const char *name, t_minishell *minishell);
+
+extern void		set_envp(char **envp, t_minishell *minishell);
+extern char		**get_envp(t_minishell *minishell);
+extern void		free_envp(char **envp);
+
+// internal.c
+
+extern char		*get_int(const char *name, t_minishell *minishell);
+extern void		set_int(const char *name, char *value, t_minishell *minishell);
+extern void		unset_int(const char *name, t_minishell *minishell);
+
+extern void		set_intp(t_minishell *minishell);
+
+#endif /* VARIABLES_H */

minishell-codex/Makefile

@@ -1,27 +0,0 @@
-NAME := minishell
-CC := cc
-CFLAGS := -Wall -Wextra -Werror -g
-INCLUDES := -Iinclude
-READLINE_LIBS := -lreadline -lncurses
-
-SRCS := $(shell find src -name '*.c')
-OBJS := $(SRCS:src/%.c=build/%.o)
-
-all: $(NAME)
-
-$(NAME): $(OBJS)
-	$(CC) $(CFLAGS) $(OBJS) $(READLINE_LIBS) -o $(NAME)
-
-build/%.o: src/%.c
-	@mkdir -p $(dir $@)
-	$(CC) $(CFLAGS) $(INCLUDES) -c $< -o $@
-
-clean:
-	rm -rf build
-
-fclean: clean
-	rm -f $(NAME)
-
-re: fclean all
-
-.PHONY: all clean fclean re

minishell-codex/docs/defensa.md

@@ -1,72 +0,0 @@
-# Minishell - Guion de defensa (version codex)
-
-Este guion esta alineado con la estructura real en `minishell-codex/`.
-
-## 1. Explicacion corta del proyecto
-- Minishell es un interprete de comandos interactivo.
-- Implementa pipes, redirecciones, variables y builtins basicos.
-- Se basa en el flujo: lectura -> lexer -> parser -> expansion -> ejecucion.
-
-## 2. Flujo completo (paso a paso)
-1. `readline()` muestra el prompt y devuelve la linea.
-2. `lex_line()` divide la linea en tokens (`TOK_WORD`, `TOK_PIPE`, redirecciones).
-3. `parse_tokens()` construye la pipeline con comandos y redirecciones.
-4. `expand_pipeline()` aplica expansion de `$VAR` y `$?` respetando comillas.
-5. `execute_pipeline()` resuelve `PATH`, prepara heredocs y ejecuta.
-
-## 3. Estructuras clave
-- `t_token`: tipo y texto de tokens (`minishell-codex/include/minishell.h`).
-- `t_command`: argv, redirecciones, path.
-- `t_pipeline`: lista de comandos.
-- `t_redir`: tipo, target y fd.
-- `t_shell`: estado global (env, exit_status, flags).
-
-## 4. Lexer (por que esta separado)
-- Maneja comillas y metacaracteres sin mezclar con ejecucion.
-- Detecta errores de comillas sin cerrar.
-- Facilita el parseo posterior.
-
-## 5. Parser
-- Convierte tokens en comandos reales.
-- Cada `TOK_PIPE` crea un nuevo comando.
-- Redirecciones se guardan en lista separada (`t_redir`).
-- Valida errores (pipe sin comando, redireccion sin destino).
-
-## 6. Expansion
-- `expand_pipeline()` recorre argv y targets de redireccion.
-- Reglas:
-  - En comilla simple no se expande.
-  - En comilla doble si se expande.
-  - `$?` es el exit status anterior.
-
-## 7. Redirecciones y heredoc
-- `apply_redirections()` abre y hace `dup2()`.
-- `prepare_heredocs()` genera un pipe con el contenido.
-- Heredoc no se mete en el historial.
-
-## 8. Ejecucion y pipes
-- Si hay un solo builtin, se ejecuta en el padre.
-- Si hay pipeline, todos se forkean.
-- Se conectan con `pipe()` y `dup2()`.
-- Se espera a todos, y el exit status es el del ultimo comando.
-
-## 9. Builtins
-- Implementados en `src/builtins/builtins.c`.
-- `echo`, `cd`, `pwd`, `env`, `export`, `unset`, `exit`.
-- `export` valida identificadores y permite `KEY=VALUE`.
-
-## 10. Señales
-- Una sola global: `g_signal`.
-- `ctrl-C`: limpia linea y muestra prompt.
-- `ctrl-\`: se ignora en interactivo.
-- En child se restauran señales por defecto.
-
-## 11. Ejemplos rapidos para demostrar
-- Pipes: `ls | wc -l`
-- Redireccion: `echo hola > out.txt`
-- Heredoc: `cat << EOF` -> texto -> `EOF`
-- Expansion: `echo $HOME`, `echo $?`
-
-## 12. Mensaje final recomendado
-"Separar lexer, parser, expansion y ejecucion me permitio mantener el codigo claro
- y replicar el comportamiento de bash para el minimo requerido por el subject."

minishell-codex/docs/tests_manual.md

@@ -1,59 +0,0 @@
-# Minishell - Checklist de pruebas manuales
-
-Ejecuta en `minishell-codex/`:
-- `make`
-- `./minishell`
-
-## 1. Prompt y salida
-- Iniciar y salir con `ctrl-D`.
-- `exit` debe cerrar el shell con el ultimo status.
-
-## 2. Comandos simples
-- `ls`
-- `pwd`
-- `echo hola`
-
-## 3. Builtins
-- `echo -n hola` (sin salto de linea)
-- `cd /` luego `pwd`
-- `export TEST=42` luego `env | grep TEST`
-- `unset TEST` luego `env | grep TEST` (no debe aparecer)
-- `env` sin argumentos
-- `exit 2`
-
-## 4. Expansion
-- `echo $HOME`
-- `echo $?` despues de un comando que falle (ej: `ls noexiste`)
-- `echo '$HOME'` (no expande)
-- `echo "$HOME"` (si expande)
-
-## 5. Pipes
-- `ls | wc -l`
-- `echo hola | cat`
-- `cat /etc/passwd | grep root | wc -l`
-
-## 6. Redirecciones
-- `echo hola > out.txt` y luego `cat out.txt`
-- `echo 1 >> out.txt` y luego `cat out.txt`
-- `cat < out.txt`
-
-## 7. Heredoc
-- `cat << EOF`
-  - escribir varias lineas
-  - `EOF`
-- Ver que se imprime todo lo escrito.
-
-## 8. Comillas
-- `echo "a b c"` (una sola palabra)
-- `echo 'a b c'` (una sola palabra)
-- `echo "a 'b' c"`
-
-## 9. Errores de parseo
-- `| ls` (no debe ejecutar)
-- `echo hola >` (error)
-- `echo "hola` (comillas sin cerrar)
-
-## 10. Senales
-- `ctrl-C` en prompt: debe limpiar linea y mostrar prompt nuevo.
-- `sleep 5` y `ctrl-C`: debe interrumpir el proceso.
-- `ctrl-\` no debe imprimir nada en prompt interactivo.

minishell-codex/include/minishell.h

@@ -1,136 +0,0 @@
-#ifndef MINISHELL_H
-#define MINISHELL_H
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <termios.h>
-#include <readline/readline.h>
-#include <readline/history.h>
-
-#define MS_PROMPT "minishell> "
-
-extern int g_signal;
-
-typedef enum e_tokentype
-{
-	TOK_WORD,
-	TOK_PIPE,
-	TOK_REDIR_IN,
-	TOK_REDIR_OUT,
-	TOK_REDIR_APPEND,
-	TOK_HEREDOC
-} t_tokentype;
-
-typedef struct s_token
-{
-	char *text;
-	t_tokentype type;
-	struct s_token *next;
-} t_token;
-
-typedef enum e_redirtype
-{
-	REDIR_IN,
-	REDIR_OUT,
-	REDIR_APPEND,
-	REDIR_HEREDOC
-} t_redirtype;
-
-typedef struct s_redir
-{
-	t_redirtype type;
-	char *target;
-	int fd;
-	struct s_redir *next;
-} t_redir;
-
-typedef struct s_command
-{
-	char **argv;
-	int argc;
-	char *path;
-	t_redir *redirs;
-} t_command;
-
-typedef struct s_pipeline
-{
-	t_command **cmds;
-	size_t count;
-} t_pipeline;
-
-typedef struct s_env
-{
-	char *key;
-	char *value;
-	struct s_env *next;
-} t_env;
-
-typedef struct s_shell
-{
-	t_env *env;
-	int exit_status;
-	int last_status;
-	int exit_requested;
-	int interactive;
-} t_shell;
-
-/* core */
-void ms_init(t_shell *sh, char **envp);
-void ms_loop(t_shell *sh);
-void ms_cleanup(t_shell *sh);
-void ms_setup_signals(t_shell *sh);
-void ms_set_child_signals(void);
-void ms_set_heredoc_signals(void);
-
-/* parser */
-t_token *lex_line(const char *line, int *error);
-void free_tokens(t_token *toks);
-
-t_pipeline *parse_tokens(t_token *toks, int *error);
-void free_pipeline(t_pipeline *p);
-
-int expand_pipeline(t_pipeline *p, t_shell *sh);
-
-/* executor */
-int execute_pipeline(t_pipeline *p, t_shell *sh);
-int prepare_heredocs(t_pipeline *p, t_shell *sh);
-int apply_redirections(t_command *cmd, int *saved_stdin, int *saved_stdout);
-void restore_redirections(int saved_stdin, int saved_stdout);
-char *resolve_path(const char *cmd, t_shell *sh);
-
-/* env */
-void env_init(t_shell *sh, char **envp);
-void env_clear(t_shell *sh);
-char *env_get(t_shell *sh, const char *key);
-int env_set(t_shell *sh, const char *key, const char *value);
-int env_unset(t_shell *sh, const char *key);
-char **env_to_envp(t_shell *sh);
-void env_free_envp(char **envp);
-void env_print(t_shell *sh);
-
-/* builtins */
-int is_builtin(const char *name);
-int exec_builtin(t_command *cmd, t_shell *sh);
-
-/* utils */
-int ms_is_space(int c);
-int ms_is_alpha(int c);
-int ms_is_alnum(int c);
-int ms_is_digit(int c);
-char *ms_strdup(const char *s);
-char *ms_strndup(const char *s, size_t n);
-char *ms_strjoin(const char *a, const char *b);
-char *ms_strjoin3(const char *a, const char *b, const char *c);
-char *ms_substr(const char *s, size_t start, size_t len);
-char **ms_split(const char *s, char delim);
-void ms_free_split(char **sp);
-char *ms_itoa(int n);
-
-#endif

minishell-codex/src/builtins/builtins.c

@@ -1,221 +0,0 @@
-#include "minishell.h"
-
-static int builtin_echo(t_command *cmd, t_shell *sh);
-static int builtin_cd(t_command *cmd, t_shell *sh);
-static int builtin_pwd(t_command *cmd, t_shell *sh);
-static int builtin_env(t_command *cmd, t_shell *sh);
-static int builtin_export(t_command *cmd, t_shell *sh);
-static int builtin_unset(t_command *cmd, t_shell *sh);
-static int builtin_exit(t_command *cmd, t_shell *sh);
-
-int is_builtin(const char *name)
-{
-	if (!name)
-		return 0;
-	return (strcmp(name, "echo") == 0 || strcmp(name, "cd") == 0
-		|| strcmp(name, "pwd") == 0 || strcmp(name, "env") == 0
-		|| strcmp(name, "export") == 0 || strcmp(name, "unset") == 0
-		|| strcmp(name, "exit") == 0);
-}
-
-int exec_builtin(t_command *cmd, t_shell *sh)
-{
-	if (strcmp(cmd->argv[0], "echo") == 0)
-		return builtin_echo(cmd, sh);
-	if (strcmp(cmd->argv[0], "cd") == 0)
-		return builtin_cd(cmd, sh);
-	if (strcmp(cmd->argv[0], "pwd") == 0)
-		return builtin_pwd(cmd, sh);
-	if (strcmp(cmd->argv[0], "env") == 0)
-		return builtin_env(cmd, sh);
-	if (strcmp(cmd->argv[0], "export") == 0)
-		return builtin_export(cmd, sh);
-	if (strcmp(cmd->argv[0], "unset") == 0)
-		return builtin_unset(cmd, sh);
-	if (strcmp(cmd->argv[0], "exit") == 0)
-		return builtin_exit(cmd, sh);
-	return 1;
-}
-
-static int builtin_echo(t_command *cmd, t_shell *sh)
-{
-	int i = 1;
-	int newline = 1;
-
-	(void)sh;
-	while (cmd->argv[i] && cmd->argv[i][0] == '-' && cmd->argv[i][1] == 'n')
-	{
-		int j = 2;
-		while (cmd->argv[i][j] == 'n')
-			j++;
-		if (cmd->argv[i][j] != '\0')
-			break;
-		newline = 0;
-		i++;
-	}
-	while (cmd->argv[i])
-	{
-		printf("%s", cmd->argv[i]);
-		if (cmd->argv[i + 1])
-			printf(" ");
-		i++;
-	}
-	if (newline)
-		printf("\n");
-	return 0;
-}
-
-static int builtin_pwd(t_command *cmd, t_shell *sh)
-{
-	char buf[4096];
-	(void)cmd;
-	(void)sh;
-	if (getcwd(buf, sizeof(buf)))
-		printf("%s\n", buf);
-	return 0;
-}
-
-static int builtin_cd(t_command *cmd, t_shell *sh)
-{
-	char *path;
-	char cwd[4096];
-
-	if (cmd->argc > 2)
-	{
-		fprintf(stderr, "minishell: cd: too many arguments\n");
-		return 1;
-	}
-	if (cmd->argc == 1)
-		path = env_get(sh, "HOME");
-	else
-		path = cmd->argv[1];
-	if (!path)
-	{
-		fprintf(stderr, "minishell: cd: HOME not set\n");
-		return 1;
-	}
-	if (getcwd(cwd, sizeof(cwd)))
-		env_set(sh, "OLDPWD", cwd);
-	if (chdir(path) != 0)
-	{
-		perror("minishell: cd");
-		return 1;
-	}
-	if (getcwd(cwd, sizeof(cwd)))
-		env_set(sh, "PWD", cwd);
-	return 0;
-}
-
-static int builtin_env(t_command *cmd, t_shell *sh)
-{
-	if (cmd->argc > 1)
-	{
-		fprintf(stderr, "minishell: env: too many arguments\n");
-		return 1;
-	}
-	env_print(sh);
-	return 0;
-}
-
-static int valid_identifier(const char *s)
-{
-	int i = 0;
-	if (!s || !ms_is_alpha((unsigned char)s[0]))
-		return 0;
-	while (s[i])
-	{
-		if (!ms_is_alnum((unsigned char)s[i]))
-			return 0;
-		i++;
-	}
-	return 1;
-}
-
-static int builtin_export(t_command *cmd, t_shell *sh)
-{
-	int i = 1;
-	if (cmd->argc == 1)
-	{
-		env_print(sh);
-		return 0;
-	}
-	while (cmd->argv[i])
-	{
-		char *eq = strchr(cmd->argv[i], '=');
-		if (eq)
-		{
-			char *key = ms_strndup(cmd->argv[i], (size_t)(eq - cmd->argv[i]));
-			char *val = ms_strdup(eq + 1);
-			if (!valid_identifier(key))
-				fprintf(stderr, "minishell: export: `%s': not a valid identifier\n", cmd->argv[i]);
-			else
-				env_set(sh, key, val);
-			free(key);
-			free(val);
-		}
-		else
-		{
-			if (!valid_identifier(cmd->argv[i]))
-				fprintf(stderr, "minishell: export: `%s': not a valid identifier\n", cmd->argv[i]);
-			else
-				env_set(sh, cmd->argv[i], "");
-		}
-		i++;
-	}
-	return 0;
-}
-
-static int builtin_unset(t_command *cmd, t_shell *sh)
-{
-	int i = 1;
-	while (cmd->argv[i])
-	{
-		env_unset(sh, cmd->argv[i]);
-		i++;
-	}
-	return 0;
-}
-
-static int builtin_exit(t_command *cmd, t_shell *sh)
-{
-	long code = sh->exit_status;
-	int i = 0;
-
-	if (sh->interactive)
-		printf("exit\n");
-	if (cmd->argc == 1)
-	{
-		sh->exit_requested = 1;
-		sh->exit_status = (int)(code & 0xFF);
-		return sh->exit_status;
-	}
-	if (cmd->argc > 2)
-	{
-		fprintf(stderr, "minishell: exit: too many arguments\n");
-		return 1;
-	}
-	if (cmd->argv[1][i] == '+' || cmd->argv[1][i] == '-')
-		i++;
-	if (cmd->argv[1][i] == '\0')
-	{
-		fprintf(stderr, "minishell: exit: %s: numeric argument required\n", cmd->argv[1]);
-		sh->exit_requested = 1;
-		sh->exit_status = 2;
-		return 2;
-	}
-	while (cmd->argv[1][i])
-	{
-		if (!ms_is_digit((unsigned char)cmd->argv[1][i]))
-		{
-			fprintf(stderr, "minishell: exit: %s: numeric argument required\n", cmd->argv[1]);
-			sh->exit_requested = 1;
-			sh->exit_status = 2;
-			return 2;
-		}
-		i++;
-	}
-	code = strtol(cmd->argv[1], NULL, 10);
-	sh->exit_requested = 1;
-	sh->exit_status = (int)(code & 0xFF);
-	return sh->exit_status;
-}

minishell-codex/src/core/init.c

@@ -1,18 +0,0 @@
-#include "minishell.h"
-
-void ms_init(t_shell *sh, char **envp)
-{
-	memset(sh, 0, sizeof(*sh));
-	sh->interactive = isatty(STDIN_FILENO);
-	sh->exit_status = 0;
-	sh->last_status = 0;
-	sh->exit_requested = 0;
-	env_init(sh, envp);
-	ms_setup_signals(sh);
-}
-
-void ms_cleanup(t_shell *sh)
-{
-	env_clear(sh);
-	rl_clear_history();
-}

minishell-codex/src/core/loop.c

@@ -1,46 +0,0 @@
-#include "minishell.h"
-
-static void handle_line(t_shell *sh, char *line)
-{
-	int error = 0;
-	t_token *toks = NULL;
-	t_pipeline *p = NULL;
-
-	toks = lex_line(line, &error);
-	if (error)
-	{
-		free_tokens(toks);
-		return;
-	}
-	p = parse_tokens(toks, &error);
-	free_tokens(toks);
-	if (error || !p)
-	{
-		free_pipeline(p);
-		return;
-	}
-	if (expand_pipeline(p, sh) != 0)
-	{
-		free_pipeline(p);
-		return;
-	}
-	sh->exit_status = execute_pipeline(p, sh);
-	sh->last_status = sh->exit_status;
-	free_pipeline(p);
-}
-
-void ms_loop(t_shell *sh)
-{
-	char *line;
-
-	while (!sh->exit_requested)
-	{
-		line = readline(MS_PROMPT);
-		if (!line)
-			break;
-		if (line[0] != '\0')
-			add_history(line);
-		handle_line(sh, line);
-		free(line);
-	}
-}

minishell-codex/src/core/signals.c

@@ -1,46 +0,0 @@
-#include "minishell.h"
-
-int g_signal = 0;
-
-static void sigint_handler(int sig)
-{
-	g_signal = sig;
-	write(STDOUT_FILENO, "\n", 1);
-	rl_on_new_line();
-	rl_replace_line("", 0);
-	rl_redisplay();
-}
-
-static void sigquit_handler(int sig)
-{
-	g_signal = sig;
-	(void)sig;
-}
-
-void ms_setup_signals(t_shell *sh)
-{
-	struct sigaction sa_int;
-	struct sigaction sa_quit;
-
-	(void)sh;
-	memset(&sa_int, 0, sizeof(sa_int));
-	memset(&sa_quit, 0, sizeof(sa_quit));
-	sa_int.sa_handler = sigint_handler;
-	sa_quit.sa_handler = sigquit_handler;
-	sigemptyset(&sa_int.sa_mask);
-	sigemptyset(&sa_quit.sa_mask);
-	sigaction(SIGINT, &sa_int, NULL);
-	sigaction(SIGQUIT, &sa_quit, NULL);
-}
-
-void ms_set_child_signals(void)
-{
-	signal(SIGINT, SIG_DFL);
-	signal(SIGQUIT, SIG_DFL);
-}
-
-void ms_set_heredoc_signals(void)
-{
-	signal(SIGINT, SIG_DFL);
-	signal(SIGQUIT, SIG_IGN);
-}

minishell-codex/src/env/env.c

@@ -1,171 +0,0 @@
-#include "minishell.h"
-
-static t_env *env_new(const char *key, const char *value)
-{
-	t_env *n = (t_env *)calloc(1, sizeof(t_env));
-	if (!n)
-		return NULL;
-	n->key = ms_strdup(key);
-	n->value = value ? ms_strdup(value) : ms_strdup("");
-	if (!n->key || !n->value)
-	{
-		free(n->key);
-		free(n->value);
-		free(n);
-		return NULL;
-	}
-	return n;
-}
-
-void env_init(t_shell *sh, char **envp)
-{
-	int i;
-	char *eq;
-
-	sh->env = NULL;
-	if (!envp)
-		return;
-	i = 0;
-	while (envp[i])
-	{
-		eq = strchr(envp[i], '=');
-		if (eq)
-		{
-			char *key = ms_strndup(envp[i], (size_t)(eq - envp[i]));
-			char *val = ms_strdup(eq + 1);
-			env_set(sh, key, val);
-			free(key);
-			free(val);
-		}
-		i++;
-	}
-}
-
-void env_clear(t_shell *sh)
-{
-	t_env *cur = sh->env;
-	t_env *next;
-
-	while (cur)
-	{
-		next = cur->next;
-		free(cur->key);
-		free(cur->value);
-		free(cur);
-		cur = next;
-	}
-	sh->env = NULL;
-}
-
-char *env_get(t_shell *sh, const char *key)
-{
-	t_env *cur = sh->env;
-
-	while (cur)
-	{
-		if (strcmp(cur->key, key) == 0)
-			return cur->value;
-		cur = cur->next;
-	}
-	return NULL;
-}
-
-int env_set(t_shell *sh, const char *key, const char *value)
-{
-	t_env *cur = sh->env;
-	t_env *prev = NULL;
-
-	while (cur)
-	{
-		if (strcmp(cur->key, key) == 0)
-		{
-			char *dup = ms_strdup(value ? value : "");
-			if (!dup)
-				return 1;
-			free(cur->value);
-			cur->value = dup;
-			return 0;
-		}
-		prev = cur;
-		cur = cur->next;
-	}
-	cur = env_new(key, value);
-	if (!cur)
-		return 1;
-	if (prev)
-		prev->next = cur;
-	else
-		sh->env = cur;
-	return 0;
-}
-
-int env_unset(t_shell *sh, const char *key)
-{
-	t_env *cur = sh->env;
-	t_env *prev = NULL;
-
-	while (cur)
-	{
-		if (strcmp(cur->key, key) == 0)
-		{
-			if (prev)
-				prev->next = cur->next;
-			else
-				sh->env = cur->next;
-			free(cur->key);
-			free(cur->value);
-			free(cur);
-			return 0;
-		}
-		prev = cur;
-		cur = cur->next;
-	}
-	return 0;
-}
-
-char **env_to_envp(t_shell *sh)
-{
-	char **envp;
-	int count = 0;
-	t_env *cur = sh->env;
-	int i = 0;
-
-	while (cur)
-	{
-		count++;
-		cur = cur->next;
-	}
-	envp = (char **)calloc((size_t)count + 1, sizeof(char *));
-	if (!envp)
-		return NULL;
-	cur = sh->env;
-	while (cur)
-	{
-		char *kv = ms_strjoin3(cur->key, "=", cur->value);
-		envp[i++] = kv;
-		cur = cur->next;
-	}
-	envp[i] = NULL;
-	return envp;
-}
-
-void env_free_envp(char **envp)
-{
-	int i = 0;
-	if (!envp)
-		return;
-	while (envp[i])
-		free(envp[i++]);
-	free(envp);
-}
-
-void env_print(t_shell *sh)
-{
-	t_env *cur = sh->env;
-	while (cur)
-	{
-		if (cur->value)
-			printf("%s=%s\n", cur->key, cur->value);
-		cur = cur->next;
-	}
-}

minishell-codex/src/executor/exec.c

@@ -1,134 +0,0 @@
-#include "minishell.h"
-
-static int exec_external(t_command *cmd, t_shell *sh)
-{
-	char **envp = env_to_envp(sh);
-	if (!envp)
-		return 1;
-	execve(cmd->path, cmd->argv, envp);
-	perror(cmd->path);
-	env_free_envp(envp);
-	return 126;
-}
-
-static int run_command_child(t_command *cmd, t_shell *sh)
-{
-	int saved_in, saved_out;
-
-	if (apply_redirections(cmd, &saved_in, &saved_out) != 0)
-		return 1;
-	if (is_builtin(cmd->argv[0]))
-		return exec_builtin(cmd, sh);
-	return exec_external(cmd, sh);
-}
-
-static int run_command_parent_builtin(t_command *cmd, t_shell *sh)
-{
-	int saved_in, saved_out;
-	int status;
-
-	if (apply_redirections(cmd, &saved_in, &saved_out) != 0)
-		return 1;
-	status = exec_builtin(cmd, sh);
-	restore_redirections(saved_in, saved_out);
-	return status;
-}
-
-static int setup_pipes(int idx, int count, int pipefd[2])
-{
-	if (idx + 1 >= count)
-		return 0;
-	if (pipe(pipefd) == -1)
-		return 1;
-	return 0;
-}
-
-static void setup_child_fds(int idx, int count, int prev_read, int pipefd[2])
-{
-	if (prev_read != -1)
-	{
-		dup2(prev_read, STDIN_FILENO);
-		close(prev_read);
-	}
-	if (idx + 1 < count)
-	{
-		dup2(pipefd[1], STDOUT_FILENO);
-		close(pipefd[0]);
-		close(pipefd[1]);
-	}
-}
-
-static void close_parent_fds(int idx, int count, int *prev_read, int pipefd[2])
-{
-	if (*prev_read != -1)
-		close(*prev_read);
-	if (idx + 1 < count)
-	{
-		close(pipefd[1]);
-		*prev_read = pipefd[0];
-	}
-	else
-		*prev_read = -1;
-}
-
-int execute_pipeline(t_pipeline *p, t_shell *sh)
-{
-	int i;
-	int prev_read = -1;
-	pid_t *pids;
-	int status = 0;
-
-	if (!p || p->count == 0)
-		return 0;
-	if (prepare_heredocs(p, sh) != 0)
-		return sh->exit_status;
-	for (size_t k = 0; k < p->count; k++)
-	{
-		if (!p->cmds[k]->argv || !p->cmds[k]->argv[0])
-			return 1;
-		free(p->cmds[k]->path);
-		p->cmds[k]->path = resolve_path(p->cmds[k]->argv[0], sh);
-	}
-	if (p->count == 1 && is_builtin(p->cmds[0]->argv[0]))
-		return run_command_parent_builtin(p->cmds[0], sh);
-	pids = (pid_t *)calloc(p->count, sizeof(pid_t));
-	if (!pids)
-		return 1;
-	for (i = 0; i < (int)p->count; i++)
-	{
-		int pipefd[2] = {-1, -1};
-		if (setup_pipes(i, (int)p->count, pipefd))
-			break;
-		pids[i] = fork();
-		if (pids[i] == 0)
-		{
-			ms_set_child_signals();
-			setup_child_fds(i, (int)p->count, prev_read, pipefd);
-			if (!p->cmds[i]->path)
-			{
-				fprintf(stderr, "minishell: %s: command not found\n", p->cmds[i]->argv[0]);
-				exit(127);
-			}
-			status = run_command_child(p->cmds[i], sh);
-			exit(status);
-		}
-		close_parent_fds(i, (int)p->count, &prev_read, pipefd);
-	}
-	for (i = 0; i < (int)p->count; i++)
-	{
-		int wstatus = 0;
-		if (pids[i] > 0)
-		{
-			waitpid(pids[i], &wstatus, 0);
-			if (i == (int)p->count - 1)
-			{
-				if (WIFEXITED(wstatus))
-					status = WEXITSTATUS(wstatus);
-				else if (WIFSIGNALED(wstatus))
-					status = 128 + WTERMSIG(wstatus);
-			}
-		}
-	}
-	free(pids);
-	return status;
-}

minishell-codex/src/executor/path.c

@@ -1,41 +0,0 @@
-#include "minishell.h"
-
-static int has_slash(const char *s)
-{
-	return (s && strchr(s, '/'));
-}
-
-char *resolve_path(const char *cmd, t_shell *sh)
-{
-	char *path_env;
-	char **parts;
-	char *candidate;
-	int i;
-
-	if (!cmd)
-		return NULL;
-	if (is_builtin(cmd))
-		return ms_strdup(cmd);
-	if (has_slash(cmd))
-		return ms_strdup(cmd);
-	path_env = env_get(sh, "PATH");
-	if (!path_env)
-		return NULL;
-	parts = ms_split(path_env, ':');
-	if (!parts)
-		return NULL;
-	i = 0;
-	while (parts[i])
-	{
-		candidate = ms_strjoin3(parts[i], "/", cmd);
-		if (candidate && access(candidate, X_OK) == 0)
-		{
-			ms_free_split(parts);
-			return candidate;
-		}
-		free(candidate);
-		i++;
-	}
-	ms_free_split(parts);
-	return NULL;
-}

minishell-codex/src/executor/redir.c

@@ -1,108 +0,0 @@
-#include "minishell.h"
-
-static int open_redir(t_redir *r)
-{
-	if (r->type == REDIR_IN)
-		return open(r->target, O_RDONLY);
-	if (r->type == REDIR_OUT)
-		return open(r->target, O_WRONLY | O_CREAT | O_TRUNC, 0644);
-	if (r->type == REDIR_APPEND)
-		return open(r->target, O_WRONLY | O_CREAT | O_APPEND, 0644);
-	return -1;
-}
-
-int prepare_heredocs(t_pipeline *p, t_shell *sh)
-{
-	size_t i;
-
-	g_signal = 0;
-	for (i = 0; i < p->count; i++)
-	{
-		t_redir *r = p->cmds[i]->redirs;
-		while (r)
-		{
-			if (r->type == REDIR_HEREDOC)
-			{
-				int fds[2];
-				char *line;
-				ms_set_heredoc_signals();
-				if (pipe(fds) == -1)
-					return 1;
-				while (1)
-				{
-					line = readline("> ");
-					if (!line)
-						break;
-					if (strcmp(line, r->target) == 0)
-					{
-						free(line);
-						break;
-					}
-					write(fds[1], line, strlen(line));
-					write(fds[1], "\n", 1);
-					free(line);
-				}
-				close(fds[1]);
-				r->fd = fds[0];
-				ms_setup_signals(sh);
-				if (g_signal == SIGINT)
-				{
-					sh->exit_status = 130;
-					return 1;
-				}
-			}
-			r = r->next;
-		}
-	}
-	return 0;
-}
-
-int apply_redirections(t_command *cmd, int *saved_stdin, int *saved_stdout)
-{
-	t_redir *r = cmd->redirs;
-	*saved_stdin = -1;
-	*saved_stdout = -1;
-	while (r)
-	{
-		int fd = -1;
-		if (r->type == REDIR_HEREDOC)
-			fd = r->fd;
-		else
-			fd = open_redir(r);
-		if (fd == -1)
-		{
-			perror(r->target);
-			return 1;
-		}
-		if (r->type == REDIR_IN || r->type == REDIR_HEREDOC)
-		{
-			if (*saved_stdin == -1)
-				*saved_stdin = dup(STDIN_FILENO);
-			dup2(fd, STDIN_FILENO);
-		}
-		else
-		{
-			if (*saved_stdout == -1)
-				*saved_stdout = dup(STDOUT_FILENO);
-			dup2(fd, STDOUT_FILENO);
-		}
-		if (r->type != REDIR_HEREDOC)
-			close(fd);
-		r = r->next;
-	}
-	return 0;
-}
-
-void restore_redirections(int saved_stdin, int saved_stdout)
-{
-	if (saved_stdin != -1)
-	{
-		dup2(saved_stdin, STDIN_FILENO);
-		close(saved_stdin);
-	}
-	if (saved_stdout != -1)
-	{
-		dup2(saved_stdout, STDOUT_FILENO);
-		close(saved_stdout);
-	}
-}

minishell-codex/src/main.c

@@ -1,17 +0,0 @@
-#include "minishell.h"
-
-int main(int argc, char **argv, char **envp)
-{
-	t_shell sh;
-
-	(void)argv;
-	if (argc != 1)
-	{
-		fprintf(stderr, "Usage: ./minishell\n");
-		return 1;
-	}
-	ms_init(&sh, envp);
-	ms_loop(&sh);
-	ms_cleanup(&sh);
-	return sh.exit_status;
-}

minishell-codex/src/parser/expand.c

@@ -1,113 +0,0 @@
-#include "minishell.h"
-
-static void buf_append(char **buf, size_t *len, size_t *cap, const char *s)
-{
-	size_t slen;
-	char *newbuf;
-
-	if (!s)
-		return;
-	slen = strlen(s);
-	if (*len + slen + 1 > *cap)
-	{
-		*cap = (*len + slen + 1) * 2;
-		newbuf = (char *)realloc(*buf, *cap);
-		if (!newbuf)
-			return;
-		*buf = newbuf;
-	}
-	memcpy(*buf + *len, s, slen);
-	*len += slen;
-	(*buf)[*len] = '\0';
-}
-
-static void buf_append_char(char **buf, size_t *len, size_t *cap, char c)
-{
-	char tmp[2];
-	tmp[0] = c;
-	tmp[1] = '\0';
-	buf_append(buf, len, cap, tmp);
-}
-
-static char *expand_word(const char *word, t_shell *sh)
-{
-	int in_single = 0;
-	int in_double = 0;
-	size_t i = 0;
-	char *out = NULL;
-	size_t len = 0, cap = 0;
-
-	while (word && word[i])
-	{
-		if (word[i] == '\'' && !in_double)
-		{
-			in_single = !in_single;
-			i++;
-			continue;
-		}
-		if (word[i] == '"' && !in_single)
-		{
-			in_double = !in_double;
-			i++;
-			continue;
-		}
-		if (word[i] == '$' && !in_single)
-		{
-			if (word[i + 1] == '?')
-			{
-				char *v = ms_itoa(sh->last_status);
-				buf_append(&out, &len, &cap, v);
-				free(v);
-				i += 2;
-				continue;
-			}
-			if (ms_is_alpha((unsigned char)word[i + 1]))
-			{
-				size_t j = i + 1;
-				while (word[j] && ms_is_alnum((unsigned char)word[j]))
-					j++;
-				char *name = ms_strndup(word + i + 1, j - (i + 1));
-				char *val = env_get(sh, name);
-				buf_append(&out, &len, &cap, val ? val : "");
-				free(name);
-				i = j;
-				continue;
-			}
-		}
-		buf_append_char(&out, &len, &cap, word[i]);
-		i++;
-	}
-	if (!out)
-		out = ms_strdup("");
-	return out;
-}
-
-int expand_pipeline(t_pipeline *p, t_shell *sh)
-{
-	size_t i;
-	int j;
-	for (i = 0; i < p->count; i++)
-	{
-		for (j = 0; p->cmds[i]->argv && p->cmds[i]->argv[j]; j++)
-		{
-			char *neww = expand_word(p->cmds[i]->argv[j], sh);
-			free(p->cmds[i]->argv[j]);
-			p->cmds[i]->argv[j] = neww;
-		}
-		if (p->cmds[i]->redirs)
-		{
-			t_redir *r = p->cmds[i]->redirs;
-			while (r)
-			{
-				if (r->target)
-				{
-					char *nt = expand_word(r->target, sh);
-					free(r->target);
-					r->target = nt;
-				}
-				r = r->next;
-			}
-		}
-	}
-	return 0;
-}

minishell-codex/src/parser/lexer.c

@@ -1,131 +0,0 @@
-#include "minishell.h"
-
-static t_token *token_new(t_tokentype type, const char *text, size_t len)
-{
-	t_token *t = (t_token *)calloc(1, sizeof(t_token));
-	if (!t)
-		return NULL;
-	t->type = type;
-	if (text)
-		t->text = ms_strndup(text, len);
-	return t;
-}
-
-static void token_add(t_token **head, t_token *new)
-{
-	t_token *cur;
-	if (!new)
-		return;
-	if (!*head)
-	{
-		*head = new;
-		return;
-	}
-	cur = *head;
-	while (cur->next)
-		cur = cur->next;
-	cur->next = new;
-}
-
-void free_tokens(t_token *toks)
-{
-	t_token *n;
-	while (toks)
-	{
-		n = toks->next;
-		free(toks->text);
-		free(toks);
-		toks = n;
-	}
-}
-
-static int is_meta(char c)
-{
-	return (c == '|' || c == '<' || c == '>');
-}
-
-static int read_word(const char *line, size_t *i, t_token **out)
-{
-	size_t start = *i;
-	int in_single = 0;
-	int in_double = 0;
-
-	while (line[*i])
-	{
-		if (line[*i] == '\'' && !in_double)
-			in_single = !in_single;
-		else if (line[*i] == '"' && !in_single)
-			in_double = !in_double;
-		else if (!in_single && !in_double)
-		{
-			if (ms_is_space(line[*i]) || is_meta(line[*i]))
-				break;
-		}
-		(*i)++;
-	}
-	if (in_single || in_double)
-		return 1;
-	*out = token_new(TOK_WORD, line + start, *i - start);
-	return 0;
-}
-
-t_token *lex_line(const char *line, int *error)
-{
-	t_token *toks = NULL;
-	size_t i = 0;
-
-	*error = 0;
-	while (line[i])
-	{
-		if (ms_is_space(line[i]))
-		{
-			i++;
-			continue;
-		}
-		if (line[i] == '|')
-		{
-			token_add(&toks, token_new(TOK_PIPE, "|", 1));
-			i++;
-			continue;
-		}
-		if (line[i] == '<')
-		{
-			if (line[i + 1] == '<')
-			{
-				token_add(&toks, token_new(TOK_HEREDOC, "<<", 2));
-				i += 2;
-			}
-			else
-			{
-				token_add(&toks, token_new(TOK_REDIR_IN, "<", 1));
-				i++;
-			}
-			continue;
-		}
-		if (line[i] == '>')
-		{
-			if (line[i + 1] == '>')
-			{
-				token_add(&toks, token_new(TOK_REDIR_APPEND, ">>", 2));
-				i += 2;
-			}
-			else
-			{
-				token_add(&toks, token_new(TOK_REDIR_OUT, ">", 1));
-				i++;
-			}
-			continue;
-		}
-		{
-			t_token *w = NULL;
-			if (read_word(line, &i, &w))
-			{
-				*error = 1;
-				free_tokens(toks);
-				return NULL;
-			}
-			token_add(&toks, w);
-		}
-	}
-	return toks;
-}

minishell-codex/src/parser/parser.c

@@ -1,175 +0,0 @@
-#include "minishell.h"
-
-static t_command *command_new(void)
-{
-	t_command *cmd = (t_command *)calloc(1, sizeof(t_command));
-	return cmd;
-}
-
-static void command_add_arg(t_command *cmd, const char *text)
-{
-	char **new_argv;
-	int i;
-
-	if (!cmd || !text)
-		return;
-	i = cmd->argc;
-	new_argv = (char **)calloc((size_t)i + 2, sizeof(char *));
-	if (!new_argv)
-		return;
-	for (int j = 0; j < i; j++)
-		new_argv[j] = cmd->argv[j];
-	new_argv[i] = ms_strdup(text);
-	new_argv[i + 1] = NULL;
-	free(cmd->argv);
-	cmd->argv = new_argv;
-	cmd->argc += 1;
-}
-
-static void command_add_redir(t_command *cmd, t_redirtype type, const char *target)
-{
-	t_redir *r = (t_redir *)calloc(1, sizeof(t_redir));
-	t_redir *cur;
-	if (!r)
-		return;
-	r->type = type;
-	r->target = ms_strdup(target);
-	r->fd = -1;
-	r->next = NULL;
-	if (!cmd->redirs)
-	{
-		cmd->redirs = r;
-		return;
-	}
-	cur = cmd->redirs;
-	while (cur->next)
-		cur = cur->next;
-	cur->next = r;
-}
-
-static void free_redirs(t_redir *r)
-{
-	t_redir *n;
-	while (r)
-	{
-		n = r->next;
-		if (r->fd != -1)
-			close(r->fd);
-		free(r->target);
-		free(r);
-		r = n;
-	}
-}
-
-void free_pipeline(t_pipeline *p)
-{
-	size_t i;
-	if (!p)
-		return;
-	for (i = 0; i < p->count; i++)
-	{
-		if (p->cmds[i])
-		{
-			for (int j = 0; p->cmds[i]->argv && p->cmds[i]->argv[j]; j++)
-				free(p->cmds[i]->argv[j]);
-			free(p->cmds[i]->argv);
-			free(p->cmds[i]->path);
-			free_redirs(p->cmds[i]->redirs);
-			free(p->cmds[i]);
-		}
-	}
-	free(p->cmds);
-	free(p);
-}
-
-static int pipeline_add_cmd(t_pipeline *p, t_command *cmd)
-{
-	t_command **new_cmds;
-	size_t i;
-
-	new_cmds = (t_command **)calloc(p->count + 1, sizeof(t_command *));
-	if (!new_cmds)
-		return 1;
-	for (i = 0; i < p->count; i++)
-		new_cmds[i] = p->cmds[i];
-	new_cmds[p->count] = cmd;
-	free(p->cmds);
-	p->cmds = new_cmds;
-	p->count += 1;
-	return 0;
-}
-
-t_pipeline *parse_tokens(t_token *toks, int *error)
-{
-	t_pipeline *p;
-	t_command *cmd;
-	t_token *cur;
-
-	*error = 0;
-	p = (t_pipeline *)calloc(1, sizeof(t_pipeline));
-	if (!p)
-		return NULL;
-	cmd = command_new();
-	if (!cmd)
-	{
-		free(p);
-		return NULL;
-	}
-	cur = toks;
-	while (cur)
-	{
-		if (cur->type == TOK_PIPE)
-		{
-			if (cmd->argc == 0)
-			{
-				*error = 1;
-				free_pipeline(p);
-				free(cmd);
-				return NULL;
-			}
-			pipeline_add_cmd(p, cmd);
-			cmd = command_new();
-			if (!cmd)
-			{
-				*error = 1;
-				free_pipeline(p);
-				return NULL;
-			}
-			cur = cur->next;
-			continue;
-		}
-		if (cur->type == TOK_REDIR_IN || cur->type == TOK_REDIR_OUT
-			|| cur->type == TOK_REDIR_APPEND || cur->type == TOK_HEREDOC)
-		{
-			if (!cur->next || cur->next->type != TOK_WORD)
-			{
-				*error = 1;
-				free_pipeline(p);
-				free(cmd);
-				return NULL;
-			}
-			if (cur->type == TOK_REDIR_IN)
-				command_add_redir(cmd, REDIR_IN, cur->next->text);
-			else if (cur->type == TOK_REDIR_OUT)
-				command_add_redir(cmd, REDIR_OUT, cur->next->text);
-			else if (cur->type == TOK_REDIR_APPEND)
-				command_add_redir(cmd, REDIR_APPEND, cur->next->text);
-			else if (cur->type == TOK_HEREDOC)
-				command_add_redir(cmd, REDIR_HEREDOC, cur->next->text);
-			cur = cur->next->next;
-			continue;
-		}
-		if (cur->type == TOK_WORD)
-			command_add_arg(cmd, cur->text);
-		cur = cur->next;
-	}
-	if (cmd->argc == 0)
-	{
-		*error = 1;
-		free_pipeline(p);
-		free(cmd);
-		return NULL;
-	}
-	pipeline_add_cmd(p, cmd);
-	return p;
-}

minishell-codex/src/utils/char_utils.c

@@ -1,6 +0,0 @@
-#include "minishell.h"
-
-int ms_is_space(int c) { return (c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\v' || c == '\f'); }
-int ms_is_alpha(int c) { return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_'); }
-int ms_is_digit(int c) { return (c >= '0' && c <= '9'); }
-int ms_is_alnum(int c) { return (ms_is_alpha(c) || ms_is_digit(c)); }

minishell-codex/src/utils/split_utils.c

@@ -1,67 +0,0 @@
-#include "minishell.h"
-
-static size_t count_parts(const char *s, char delim)
-{
-	size_t count = 0;
-	int in = 0;
-	while (*s)
-	{
-		if (*s == delim)
-			in = 0;
-		else if (!in)
-		{
-			in = 1;
-			count++;
-		}
-		s++;
-	}
-	return count;
-}
-
-char **ms_split(const char *s, char delim)
-{
-	char **out;
-	size_t parts;
-	size_t i = 0;
-	size_t start = 0;
-	size_t len = 0;
-	int in = 0;
-
-	if (!s)
-		return NULL;
-	parts = count_parts(s, delim);
-	out = (char **)calloc(parts + 1, sizeof(char *));
-	if (!out)
-		return NULL;
-	while (s[i])
-	{
-		if (s[i] == delim)
-		{
-			if (in)
-			{
-				out[len++] = ms_strndup(s + start, i - start);
-				in = 0;
-			}
-		}
-		else if (!in)
-		{
-			in = 1;
-			start = i;
-		}
-		i++;
-	}
-	if (in)
-		out[len++] = ms_strndup(s + start, i - start);
-	out[len] = NULL;
-	return out;
-}
-
-void ms_free_split(char **sp)
-{
-	size_t i = 0;
-	if (!sp)
-		return;
-	while (sp[i])
-		free(sp[i++]);
-	free(sp);
-}

minishell-codex/src/utils/str_utils.c

@@ -1,100 +0,0 @@
-#include "minishell.h"
-
-char *ms_strdup(const char *s)
-{
-	char *out;
-	size_t len;
-
-	if (!s)
-		return NULL;
-	len = strlen(s);
-	out = (char *)malloc(len + 1);
-	if (!out)
-		return NULL;
-	memcpy(out, s, len);
-	out[len] = '\0';
-	return out;
-}
-
-char *ms_strndup(const char *s, size_t n)
-{
-	char *out;
-	if (!s)
-		return NULL;
-	out = (char *)malloc(n + 1);
-	if (!out)
-		return NULL;
-	memcpy(out, s, n);
-	out[n] = '\0';
-	return out;
-}
-
-char *ms_substr(const char *s, size_t start, size_t len)
-{
-	size_t slen;
-	if (!s)
-		return NULL;
-	slen = strlen(s);
-	if (start >= slen)
-		return ms_strdup("");
-	if (start + len > slen)
-		len = slen - start;
-	return ms_strndup(s + start, len);
-}
-
-char *ms_strjoin(const char *a, const char *b)
-{
-	size_t la;
-	size_t lb;
-	char *out;
-
-	if (!a || !b)
-		return NULL;
-	la = strlen(a);
-	lb = strlen(b);
-	out = (char *)malloc(la + lb + 1);
-	if (!out)
-		return NULL;
-	memcpy(out, a, la);
-	memcpy(out + la, b, lb);
-	out[la + lb] = '\0';
-	return out;
-}
-
-char *ms_strjoin3(const char *a, const char *b, const char *c)
-{
-	char *ab;
-	char *abc;
-
-	ab = ms_strjoin(a, b);
-	if (!ab)
-		return NULL;
-	abc = ms_strjoin(ab, c);
-	free(ab);
-	return abc;
-}
-
-char *ms_itoa(int n)
-{
-	char buf[32];
-	int i;
-	int neg;
-	long nb;
-
-	nb = n;
-	neg = (nb < 0);
-	if (neg)
-		nb = -nb;
-	i = 30;
-	buf[31] = '\0';
-	if (nb == 0)
-		buf[i--] = '0';
-	while (nb > 0)
-	{
-		buf[i--] = (char)('0' + (nb % 10));
-		nb /= 10;
-	}
-	if (neg)
-		buf[i--] = '-';
-	return ms_strdup(&buf[i + 1]);
-}

src/builtins/builtins.c

@@ -12,23 +12,53 @@
 
 #include "builtins.h"
 
-u_int8_t	set_builtins(
-	t_minishell *minishell
-) {
-	minishell->builtins
-		= ft_hashmap_new(4, ft_hashmap_hashstr, ft_hashmap_strcmp);
-	if (minishell->builtins == NULL)
+static uint8_t	register_builtin(
+	t_minishell *minishell,
+	const char *name,
+	t_builtin_func builtin
+)
+{
+	char	*key;
+
+	key = ft_strdup(name);
+	if (key == NULL)
 		return (0);
-	ft_hashmap_put(minishell->builtins, ft_strdup("cd"), builtin_cd);
-	ft_hashmap_put(minishell->builtins, ft_strdup("echo"), builtin_echo);
-	ft_hashmap_put(minishell->builtins, ft_strdup("exit"), builtin_exit);
-	ft_hashmap_put(minishell->builtins, ft_strdup("pwd"), builtin_pwd);
+	ft_hashmap_put(minishell->builtins, key, builtin);
+	if (!ft_hashmap_contains_key(minishell->builtins, name))
+	{
+		free(key);
+		return (0);
+	}
 	return (1);
 }
 
-u_int8_t	is_builtin(
+uint8_t	set_builtins(
+	t_minishell *minishell
+) {
+	minishell->builtins
+		= ft_hashmap_new(7, ft_hashmap_hashstr, ft_hashmap_strcmp);
+	if (minishell->builtins == NULL)
+		return (0);
+	if (!register_builtin(minishell, "cd", builtin_cd)
+		|| !register_builtin(minishell, "echo", builtin_echo)
+		|| !register_builtin(minishell, "env", builtin_env)
+		|| !register_builtin(minishell, "exit", builtin_exit)
+		|| !register_builtin(minishell, "export", builtin_export)
+		|| !register_builtin(minishell, "pwd", builtin_pwd)
+		|| !register_builtin(minishell, "unset", builtin_unset))
+	{
+		ft_hashmap_clear_keys(&minishell->builtins);
+		return (0);
+	}
+	return (1);
+}
+
+uint8_t	is_builtin(
 	const char *command_name,
 	t_minishell *minishell
 ) {
+	if (command_name == NULL || minishell == NULL
+		|| minishell->builtins == NULL)
+		return (0);
 	return (ft_hashmap_contains_key(minishell->builtins, command_name));
 }

src/builtins/cd/cd.c

@@ -12,43 +12,104 @@
 
 #include "builtins.h"
 
-static u_int8_t	handle_error(t_command cmd, t_minishell *msh, char *path);
+static uint8_t	handle_error(void);
+static void		update_pwd_vars(t_minishell *msh, char *oldpwd);
+static char		*get_path_from_env(
+					t_minishell *msh,
+					const char *env_name,
+					const char *error,
+					uint8_t *status
+					);
+static char		*resolve_cd_path(
+					t_command cmd,
+					t_minishell *msh,
+					uint8_t *status
+					);
 
-u_int8_t	builtin_cd(
+uint8_t	builtin_cd(
 	t_command cmd,
 	t_minishell *msh
 ){
 	char	*path;
+	char	*oldpwd;
+	uint8_t	status;
+	bool	show_pwd;
 
-	if (cmd.argc > 2)
-	{
-		ft_eputendl("minishell: cd: too many arguments");
-		return (2);
-	}
-	else if (cmd.argc == 1)
-		path = get_env("HOME", msh);
-	else
-		path = cmd.argv[1];
+	path = resolve_cd_path(cmd, msh, &status);
+	if (status != EXIT_SUCCESS)
+		return (status);
+	show_pwd = (cmd.argc == 2 && ft_strcmp(cmd.argv[1], "-") == 0);
+	oldpwd = getcwd(NULL, 0);
 	if (chdir(path) == -1)
-		return (handle_error(cmd, msh, path));
+	{
+		free(oldpwd);
+		return (handle_error());
+	}
+	update_pwd_vars(msh, oldpwd);
+	if (show_pwd && get_env("PWD", msh) != NULL)
+		ft_putendl(get_env("PWD", msh));
+	free(oldpwd);
 	return (EXIT_SUCCESS);
 }
 
-static u_int8_t	handle_error(
+static uint8_t	handle_error(void)
+{
+	perror("minishell: cd");
+	return (EXIT_FAILURE);
+}
+
+static void	update_pwd_vars(
+	t_minishell *msh,
+	char *oldpwd
+){
+	char	*newpwd;
+
+	if (oldpwd != NULL)
+		set_env("OLDPWD", oldpwd, msh);
+	newpwd = getcwd(NULL, 0);
+	if (newpwd != NULL)
+	{
+		set_env("PWD", newpwd, msh);
+		free(newpwd);
+	}
+}
+
+static char	*resolve_cd_path(
 	t_command cmd,
 	t_minishell *msh,
-	char *path
+	uint8_t *status
 ){
-	u_int8_t	exit_code;
-
-	(void)msh;
-	exit_code = 0;
-	if (access(path, F_OK) != -1)
-		// No such file or directory
-		exit_code = 1;
-	else if (access(path, X_OK) == -1)
-		// Permission denied
-		exit_code = 2;
-	perror(cmd.argv[0]);
-	return (exit_code);
+	if (cmd.argc > 2)
+	{
+		ft_eputendl("minishell: cd: too many arguments");
+		*status = EXIT_FAILURE;
+		return (NULL);
+	}
+	if (cmd.argc == 2 && ft_strcmp(cmd.argv[1], "-") == 0)
+		return (get_path_from_env(msh, "OLDPWD",
+				"minishell: cd: OLDPWD not set", status));
+	if (cmd.argc == 1)
+		return (get_path_from_env(msh, "HOME",
+				"minishell: cd: HOME not set", status));
+	*status = EXIT_SUCCESS;
+	return (cmd.argv[1]);
+}
+
+static char	*get_path_from_env(
+	t_minishell *msh,
+	const char *env_name,
+	const char *error,
+	uint8_t *status
+){
+	char	*path;
+
+	path = get_env(env_name, msh);
+	if (path == NULL)
+	{
+		ft_eputendl((char *)error);
+		*status = EXIT_FAILURE;
+		return (NULL);
+	}
+	*status = EXIT_SUCCESS;
+	return (path);
 }

src/builtins/echo/echo.c

@@ -13,7 +13,7 @@
 #include "builtins.h"
 #include "echo_def.h"
 
-u_int8_t	builtin_echo(
+uint8_t	builtin_echo(
 	t_command cmd,
 	t_minishell *msh
 ){

src/builtins/echo/echo_def.c

@@ -13,7 +13,7 @@
 #include "echo_def.h"
 
 static void		assign_flags(t_args *args, t_command cmd, size_t *i);
-static u_int8_t	is_valid_flag(t_args *args, char *flag);
+static uint8_t	is_valid_flag(t_args *args, char *flag);
 
 static void	assign_default_flags(
 	t_args *args
@@ -51,7 +51,7 @@ static void	assign_flags(
 	}
 }
 
-static u_int8_t	is_valid_flag(
+static uint8_t	is_valid_flag(
 	t_args *args,
 	char *flag
 ){

src/builtins/env/env.c

@@ -0,0 +1,59 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   env.c                                              :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/09 22:05:00 by codex             #+#    #+#             */
+/*   Updated: 2026/02/09 22:05:00 by codex            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+
+static void	print_entry(t_map_entry *entry);
+static void	print_env(t_minishell *msh);
+
+uint8_t	builtin_env(
+	t_command cmd,
+	t_minishell *msh
+)
+{
+	if (cmd.argc > 1)
+	{
+		ft_eprintf("minishell: env: %s: No such file or directory\n",
+			cmd.argv[1]);
+		return (127);
+	}
+	print_env(msh);
+	return (EXIT_SUCCESS);
+}
+
+static void	print_entry(
+	t_map_entry *entry
+)
+{
+	ft_putstr((char *)entry->key);
+	ft_putchar('=');
+	if (entry->value != NULL)
+		ft_putstr((char *)entry->value);
+	ft_putchar('\n');
+}
+
+static void	print_env(
+	t_minishell *msh
+)
+{
+	t_list	*entries;
+	t_list	*current;
+
+	entries = ft_hashmap_entries(msh->variables.environment);
+	current = entries;
+	while (current != NULL)
+	{
+		print_entry((t_map_entry *)current->content);
+		current = current->next;
+	}
+	ft_lstclear_nodes(&entries);
+}

src/builtins/exit/exit.c

@@ -11,36 +11,47 @@
 /* ************************************************************************** */
 
 #include "builtins.h"
-#include <stdint.h>
+
+static bool	exit_arg_is_invalid(const char *arg)
+{
+	if (arg == NULL)
+		return (true);
+	if (arg[0] == '\0')
+		return (true);
+	if ((*arg == '+' || *arg == '-') && arg[1] == '\0')
+		return (true);
+	if (!ft_strisnum(arg))
+		return (true);
+	return (false);
+}
 
 uint8_t	builtin_exit(
 	t_command cmd,
 	t_minishell *msh
 )
 {
-	uint8_t	exit_status;
-	
-	ft_eputendl("exit");
+	if (isatty(STDIN_FILENO))
+		ft_eputendl("exit");
 	if (cmd.argc == 1)
-		exit_status = msh->exit_status;
-	else if (!ft_strisnum(cmd.argv[1]))
 	{
-		ft_eprintf(
-			"minishell: exit: %s: numeric argument required\n",
+		msh->exit = 1;
+		return (msh->exit_status);
+	}
+	if (exit_arg_is_invalid(cmd.argv[1]))
+	{
+		ft_eprintf("minishell: exit: %s: numeric argument required\n",
 			cmd.argv[1]);
-		return (2);
+		msh->exit = 1;
+		msh->exit_status = 2;
+		return (msh->exit_status);
 	}
-	else if (cmd.argc > 2)
+	if (cmd.argc > 2)
 	{
-		ft_eputendl("exit: too many arguments");
-		return (2);
+		ft_eputendl("minishell: exit: too many arguments");
+		msh->exit_status = EXIT_FAILURE;
+		return (msh->exit_status);
 	}
-	else
-		exit_status = (uint8_t)ft_atol(cmd.argv[1]);
-
-	printf("builtin_exit: exit_status=%d\n", exit_status); // Debug print
-
 	msh->exit = 1;
-	msh->exit_status = exit_status;
-	return (exit_status);
+	msh->exit_status = (uint8_t)ft_atol(cmd.argv[1]);
+	return (msh->exit_status);
 }

src/builtins/export/export.c

@@ -0,0 +1,151 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   export.c                                           :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/09 22:05:00 by codex             #+#    #+#             */
+/*   Updated: 2026/02/14 02:02:14 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+
+static uint8_t	export_one(char *arg, t_minishell *msh);
+static uint8_t	print_exported(t_minishell *msh);
+static void		**entries_to_array(t_list *lst, size_t *count,
+					bool add_oldpwd, t_map_entry *oldpwd_entry);
+static bool		print_sorted_entries(t_map_entry **entries, size_t count);
+bool			export_is_valid_identifier(const char *arg, size_t name_len);
+void			export_parse_assignment(char *arg, char **eq_pos,
+					size_t *name_len, bool *append);
+uint8_t			export_set_assigned_value(const char *name, char *eq_pos,
+					bool append, t_minishell *msh);
+bool			export_print_declaration(const char *name, const char *value);
+void			export_sort_entries(t_map_entry **entries, size_t count);
+
+uint8_t	builtin_export(
+	t_command cmd,
+	t_minishell *msh
+)
+{
+	uint8_t	status;
+	uint8_t	result;
+	size_t	i;
+
+	if (cmd.argc == 1)
+		return (print_exported(msh));
+	status = EXIT_SUCCESS;
+	i = 0;
+	while (cmd.argv[++i] != NULL)
+	{
+		result = export_one(cmd.argv[i], msh);
+		if (result == 2)
+			return (2);
+		if (result != EXIT_SUCCESS)
+			status = EXIT_FAILURE;
+	}
+	return (status);
+}
+
+static uint8_t	export_one(
+	char *arg,
+	t_minishell *msh
+)
+{
+	char	*eq_pos;
+	char	*name;
+	size_t	name_len;
+	bool	append;
+
+	if (arg[0] == '-' && arg[1] != '\0')
+		return (ft_eprintf("minishell: export: %s: invalid option\n", arg),
+			ft_eputendl("export: usage: export [name[=value] ...]"), 2);
+	export_parse_assignment(arg, &eq_pos, &name_len, &append);
+	if (!export_is_valid_identifier(arg, name_len))
+		return (ft_eprintf(
+				"minishell: export: `%s': not a valid identifier\n", arg),
+			EXIT_FAILURE);
+	name = ft_substr(arg, 0, name_len);
+	if (name == NULL)
+		return (EXIT_FAILURE);
+	if (export_set_assigned_value(name, eq_pos, append, msh) != EXIT_SUCCESS)
+		return (free(name), EXIT_FAILURE);
+	free(name);
+	return (EXIT_SUCCESS);
+}
+
+static uint8_t	print_exported(
+	t_minishell *msh
+)
+{
+	t_list		*entries;
+	t_map_entry	**sorted_entries;
+	t_map_entry	oldpwd_entry;
+	size_t		count;
+
+	entries = ft_hashmap_entries(msh->variables.environment);
+	if (entries == NULL)
+		return (EXIT_SUCCESS);
+	oldpwd_entry = (t_map_entry){"OLDPWD", NULL};
+	sorted_entries = (t_map_entry **)entries_to_array(entries, &count,
+			!ft_hashmap_contains_key(msh->variables.environment, "OLDPWD"),
+			&oldpwd_entry);
+	ft_lstclear_nodes(&entries);
+	if (sorted_entries == NULL)
+		return (EXIT_FAILURE);
+	export_sort_entries(sorted_entries, count);
+	if (!print_sorted_entries(sorted_entries, count))
+		return (free(sorted_entries), EXIT_FAILURE);
+	return (free(sorted_entries), EXIT_SUCCESS);
+}
+
+static void	**entries_to_array(
+	t_list *entries,
+	size_t *count,
+	bool add_oldpwd,
+	t_map_entry *oldpwd_entry
+)
+{
+	void		**array;
+	t_list		*node;
+	t_map_entry	*entry;
+	size_t		i;
+
+	*count = (size_t)ft_lstsize(entries) + (size_t)add_oldpwd;
+	array = (void **)malloc(sizeof(void *) * (*count));
+	if (array == NULL)
+		return (NULL);
+	i = 0;
+	node = entries;
+	while (node != NULL)
+	{
+		entry = (t_map_entry *)node->content;
+		if (entry != NULL && ft_strcmp((char *)entry->key, "_") != 0)
+			array[i++] = entry;
+		node = node->next;
+	}
+	if (add_oldpwd)
+		array[i++] = oldpwd_entry;
+	*count = i;
+	return (array);
+}
+
+static bool	print_sorted_entries(
+	t_map_entry **entries,
+	size_t count
+)
+{
+	size_t	i;
+
+	i = 0;
+	while (i < count)
+	{
+		if (!export_print_declaration((char *)entries[i]->key,
+				(char *)entries[i]->value))
+			return (false);
+		i++;
+	}
+	return (true);
+}

src/builtins/export/export_sort.c

@@ -0,0 +1,40 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   export_sort.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 23:55:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 23:55:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+
+void	export_sort_entries(
+	t_map_entry **entries,
+	size_t count
+)
+{
+	size_t		i;
+	size_t		j;
+	t_map_entry	*tmp;
+
+	i = 0;
+	while (i < count)
+	{
+		j = i + 1;
+		while (j < count)
+		{
+			if (ft_strcmp((char *)entries[i]->key, (char *)entries[j]->key) > 0)
+			{
+				tmp = entries[i];
+				entries[i] = entries[j];
+				entries[j] = tmp;
+			}
+			j++;
+		}
+		i++;
+	}
+}

src/builtins/export/export_utils.c

@@ -0,0 +1,129 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   export_utils.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 15:20:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 15:20:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+
+bool	export_is_valid_identifier(
+	const char *arg,
+	size_t name_len
+)
+{
+	size_t	i;
+
+	if (name_len == 0 || arg == NULL)
+		return (false);
+	if (!ft_isalpha(arg[0]) && arg[0] != '_')
+		return (false);
+	i = 0;
+	while (++i < name_len)
+		if (!ft_isalnum(arg[i]) && arg[i] != '_')
+			return (false);
+	return (true);
+}
+
+void	export_parse_assignment(
+	char *arg,
+	char **eq_pos,
+	size_t *name_len,
+	bool *append
+)
+{
+	char	*plus_eq;
+
+	*append = false;
+	*eq_pos = ft_strchr(arg, '=');
+	*name_len = ft_strlen(arg);
+	plus_eq = ft_strnstr(arg, "+=", *name_len);
+	if (plus_eq != NULL)
+	{
+		*append = true;
+		*name_len = (size_t)(plus_eq - arg);
+		*eq_pos = plus_eq + 1;
+	}
+	else if (*eq_pos != NULL)
+		*name_len = (size_t)(*eq_pos - arg);
+}
+
+uint8_t	export_set_assigned_value(
+	const char *name,
+	char *eq_pos,
+	bool append,
+	t_minishell *msh
+)
+{
+	char	*current;
+	char	*joined;
+
+	if (append)
+	{
+		current = get_var((char *)name, msh);
+		if (current == NULL)
+			current = "";
+		joined = ft_strnjoin(2, current, eq_pos + 1);
+		if (joined == NULL)
+			return (EXIT_FAILURE);
+		set_var(name, joined, msh);
+		free(joined);
+		return (EXIT_SUCCESS);
+	}
+	if (eq_pos != NULL)
+		set_var(name, eq_pos + 1, msh);
+	else
+		set_var(name, "", msh);
+	return (EXIT_SUCCESS);
+}
+
+char	*export_escape_value(
+	const char *value
+)
+{
+	char	*escaped;
+	size_t	i;
+	size_t	j;
+
+	escaped = (char *)malloc((ft_strlen(value) * 2) + 1);
+	if (escaped == NULL)
+		return (NULL);
+	i = 0;
+	j = 0;
+	while (value[i] != '\0')
+	{
+		if (value[i] == '\\' || value[i] == '\"' || value[i] == '$')
+			escaped[j++] = '\\';
+		escaped[j++] = value[i++];
+	}
+	escaped[j] = '\0';
+	return (escaped);
+}
+
+bool	export_print_declaration(
+	const char *name,
+	const char *value
+)
+{
+	char	*escaped;
+
+	ft_putstr("declare -x ");
+	ft_putstr((char *)name);
+	if (value != NULL)
+	{
+		escaped = export_escape_value(value);
+		if (escaped == NULL)
+			return (false);
+		ft_putstr("=\"");
+		ft_putstr(escaped);
+		ft_putstr("\"");
+		free(escaped);
+	}
+	ft_putchar('\n');
+	return (true);
+}

src/builtins/pwd/pwd.c

@@ -12,15 +12,21 @@
 
 #include "builtins.h"
 
-u_int8_t	builtin_pwd(
+uint8_t	builtin_pwd(
 	t_command cmd,
 	t_minishell *msh
 ){
-	char	cwd[PATH_MAX];
+	char	*cwd;
 
 	(void)cmd;
 	(void)msh;
-	if (getcwd(cwd, PATH_MAX) != NULL)
-		ft_putendl(cwd);
+	cwd = getcwd(NULL, 0);
+	if (cwd == NULL)
+	{
+		perror("minishell: pwd");
+		return (EXIT_FAILURE);
+	}
+	ft_putendl(cwd);
+	free(cwd);
 	return (EXIT_SUCCESS);
 }

src/builtins/unset/unset.c

@@ -0,0 +1,80 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   unset.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/09 22:05:00 by codex             #+#    #+#             */
+/*   Updated: 2026/02/09 22:05:00 by codex            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+
+static uint8_t	is_valid_identifier(const char *arg);
+static uint8_t	unset_one(char *arg, t_minishell *msh);
+static bool		is_option(const char *arg);
+
+uint8_t	builtin_unset(
+	t_command cmd,
+	t_minishell *msh
+)
+{
+	uint8_t	status;
+	uint8_t	result;
+	size_t	i;
+
+	status = EXIT_SUCCESS;
+	i = 0;
+	while (cmd.argv[++i] != NULL)
+	{
+		result = unset_one(cmd.argv[i], msh);
+		if (result == 2)
+			return (2);
+		if (result != EXIT_SUCCESS)
+			status = EXIT_FAILURE;
+	}
+	return (status);
+}
+
+static uint8_t	is_valid_identifier(
+	const char *arg
+)
+{
+	size_t	i;
+
+	if (arg == NULL || *arg == '\0')
+		return (0);
+	if (!ft_isalpha(arg[0]) && arg[0] != '_')
+		return (0);
+	i = 0;
+	while (arg[++i] != '\0')
+		if (!ft_isalnum(arg[i]) && arg[i] != '_')
+			return (0);
+	return (1);
+}
+
+static uint8_t	unset_one(
+	char *arg,
+	t_minishell *msh
+)
+{
+	if (is_option(arg))
+	{
+		ft_eprintf("minishell: unset: %s: invalid option\n", arg);
+		ft_eputendl("unset: usage: unset [name ...]");
+		return (2);
+	}
+	if (!is_valid_identifier(arg))
+		return (EXIT_SUCCESS);
+	unset_env(arg, msh);
+	return (EXIT_SUCCESS);
+}
+
+static bool	is_option(
+	const char *arg
+)
+{
+	return (arg != NULL && arg[0] == '-' && arg[1] != '\0');
+}

src/core/command/command.c

@@ -9,4 +9,3 @@
 /*   Updated: 2026/02/09 18:40:04 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
-

src/core/signals.c

@@ -0,0 +1,56 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   signals.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/13 00:00:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "core.h"
+#include "signals_internal.h"
+
+int	g_signal = 0;
+
+static void	sigint_handler_interactive(int signal)
+{
+	g_signal = signal;
+	write(STDOUT_FILENO, "\n", 1);
+	rl_on_new_line();
+	rl_replace_line("", 0);
+	rl_redisplay();
+}
+
+void	minishell_set_interactive_signals(void)
+{
+	struct sigaction	action;
+
+	ft_bzero(&action, sizeof(action));
+	action.sa_handler = sigint_handler_interactive;
+	sigemptyset(&action.sa_mask);
+	sigaction(SIGINT, &action, NULL);
+	action.sa_handler = SIG_IGN;
+	sigaction(SIGQUIT, &action, NULL);
+}
+
+void	minishell_set_execution_signals(void)
+{
+	struct sigaction	action;
+
+	ft_bzero(&action, sizeof(action));
+	action.sa_handler = SIG_IGN;
+	sigemptyset(&action.sa_mask);
+	sigaction(SIGINT, &action, NULL);
+	sigaction(SIGQUIT, &action, NULL);
+}
+
+bool	minishell_consume_sigint(void)
+{
+	if (g_signal != SIGINT)
+		return (false);
+	g_signal = 0;
+	return (true);
+}

src/core/signals_child.c

@@ -0,0 +1,24 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   signals_child.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 18:20:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 18:20:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "core.h"
+
+void	minishell_set_child_signals(void)
+{
+	struct sigaction	action;
+
+	ft_bzero(&action, sizeof(action));
+	action.sa_handler = SIG_DFL;
+	sigemptyset(&action.sa_mask);
+	sigaction(SIGINT, &action, NULL);
+	sigaction(SIGQUIT, &action, NULL);
+}

src/core/signals_heredoc.c

@@ -0,0 +1,32 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   signals_heredoc.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 23:40:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 23:40:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "core.h"
+#include "signals_internal.h"
+
+static void	sigint_handler_heredoc(int signal)
+{
+	g_signal = signal;
+	write(STDOUT_FILENO, "\n", 1);
+}
+
+void	minishell_set_heredoc_signals(void)
+{
+	struct sigaction	action;
+
+	ft_bzero(&action, sizeof(action));
+	action.sa_handler = sigint_handler_heredoc;
+	sigemptyset(&action.sa_mask);
+	sigaction(SIGINT, &action, NULL);
+	action.sa_handler = SIG_IGN;
+	sigaction(SIGQUIT, &action, NULL);
+}

src/core/signals_internal.h

@@ -0,0 +1,18 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   signals_internal.h                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 23:40:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 23:40:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef SIGNALS_INTERNAL_H
+# define SIGNALS_INTERNAL_H
+
+extern int	g_signal;
+
+#endif

src/errors/errors.c

@@ -6,7 +6,7 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2026/02/10 22:22:06 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/12 02:55:36 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 06:58:05 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -28,4 +28,11 @@ void	syntax_error_unexpected_token(
 void	malloc_error(void)
 {
 	ft_eprintf("minishell: %s\n", strerror(ENOMEM));
-}
+}
+
+void	command_not_found_error(
+	const char *command
+)
+{
+	ft_eprintf("minishell: %s: command not found\n", command);
+}

src/executor/command_exec.c

@@ -0,0 +1,85 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   command_exec.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/11 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 13:12:58 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+#include "builtins.h"
+#include "errors.h"
+#include <errno.h>
+
+static uint8_t	resolve_execve_status(void)
+{
+	if (errno == ENOENT)
+		return (127);
+	if (errno == EACCES || errno == ENOEXEC || errno == EISDIR)
+		return (126);
+	return (EXIT_FAILURE);
+}
+
+static uint8_t	execute_builtin(
+	const t_command *command,
+	t_minishell *minishell
+)
+{
+	const t_builtin_func	builtin
+		= ft_hashmap_get(minishell->builtins, command->argv[0]);
+
+	return (builtin(*command, minishell));
+}
+
+static void	handle_execve_error(
+	const t_command *command,
+	char **envp
+)
+{
+	uint8_t	exit_status;
+	size_t	i;
+
+	exit_status = resolve_execve_status();
+	i = 0;
+	while (envp[i] != NULL)
+		free(envp[i++]);
+	free(envp);
+	perror(command->path);
+	exit(exit_status);
+}
+
+static void	execute_external_command(
+	const t_command *command,
+	t_minishell *minishell
+)
+{
+	char	**envp;
+
+	envp = get_envp(minishell);
+	if (envp == NULL)
+		return (malloc_error(), exit(EXIT_FAILURE));
+	execve(command->path, command->argv, envp);
+	handle_execve_error(command, envp);
+}
+
+uint8_t	executor_execute_command(
+	t_command *command,
+	t_minishell *minishell
+)
+{
+	if (command == NULL || command->argv == NULL || command->argv[0] == NULL)
+		return (EXIT_SUCCESS);
+	if (executor_is_builtin_command(command, minishell))
+		return (execute_builtin(command, minishell));
+	if (command->path != NULL)
+		free(command->path);
+	command->path = executor_resolve_command_path(command, minishell);
+	if (command->path == NULL)
+		return (command_not_found_error(command->argv[0]), 127);
+	execute_external_command(command, minishell);
+	return (EXIT_FAILURE);
+}

src/executor/command_free.c

@@ -0,0 +1,57 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   command_free.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/13 00:00:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+
+static void	cmdfree_argv(
+	char **argv
+)
+{
+	size_t	i;
+
+	if (argv == NULL)
+		return ;
+	i = 0;
+	while (argv[i] != NULL)
+	{
+		free(argv[i]);
+		i++;
+	}
+	free(argv);
+}
+
+static void	cmdfree_redirection(
+	t_redirection *redirection
+)
+{
+	if (redirection == NULL)
+		return ;
+	if (redirection->type == TOKEN_HEREDOC && redirection->heredoc_ready
+		&& redirection->target != NULL)
+		unlink(redirection->target);
+	free(redirection->target);
+	free(redirection);
+}
+
+void	executor_cmdfree(
+	t_command *command
+)
+{
+	if (command == NULL)
+		return ;
+	cmdfree_argv(command->argv);
+	free(command->path);
+	ft_lstclear(&command->redirections,
+		(void (*)(void *))cmdfree_redirection);
+	ft_lstclear(&command->heredocs, (void (*)(void *))cmdfree_redirection);
+	free(command);
+}

src/executor/executor.c

@@ -6,198 +6,81 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2026/02/08 19:10:47 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/08 21:32:03 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 13:10:43 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "executor.h"
-#include "builtins.h"
 
-static inline uint8_t	execute_builtin(
-	const t_command *command,
+static void	init_exec_state(
+	t_exec_state *state,
+	t_list *command_list
+)
+{
+	state->exit_status = EXIT_SUCCESS;
+	state->pipeline.prev_read_fd = -1;
+	state->current_command = command_list;
+	state->last_child_pid = -1;
+}
+
+static bool	fork_current_command(
+	t_exec_state *state,
 	t_minishell *minishell
 )
 {
-	const t_builtin_func	builtin
-		= ft_hashmap_get(minishell->builtins, command->path);
+	pid_t	pid;
 
-	return (builtin(*command, minishell));
-}
-
-static void	handle_execve_error(
-	const t_command *command,
-	char **envp
-)
-{
-	free_envp(envp);
-	perror(command->path);
-	exit(EXIT_FAILURE);
-}
-
-static void	execute_external_command(
-	const t_command *command,
-	t_minishell *minishell
-)
-{
-	char	**envp;
-
-	envp = get_envp(minishell);
-	if (envp == NULL)
-	{
-		perror("get_envp");
-		exit(EXIT_FAILURE);
-	}
-	execve(command->path, command->argv, envp);
-	handle_execve_error(command, envp);
-}
-
-static uint8_t	execute_command(
-	const t_command *command,
-	t_minishell *minishell
-)
-{
-	if (is_builtin(command->path, minishell))
-		return (execute_builtin(command, minishell));
-	else
-	{
-		execute_external_command(command, minishell);
-		return (EXIT_FAILURE); //! should never reach here
-	}
-}
-
-static void	cmdfree_argv(
-	char **argv
-)
-{
-	size_t	i;
-
-	if (argv == NULL)
-		return ;
-	i = 0;
-	while (argv[i] != NULL)
-	{
-		free(argv[i]);
-		i++;
-	}
-	free(argv);
-}
-
-static void	cmdfree(
-	t_command *command
-)
-{
-	if (command == NULL)
-		return ;
-	cmdfree_argv(command->argv);
-	free(command->path);
-	free(command);
-}
-
-static int	create_pipe_if_needed(
-	t_list *current_command,
-	t_pipeline *pipeline
-)
-{
-	if (!current_command->next)
-		return (0);
-	if (pipe(pipeline->pipefd) == PIPE_ERROR)
-		return (perror("pipe"), PIPE_ERROR);
-	return (0);
-}
-
-static bool	is_fork_required(
-	t_list *current_command,
-	t_minishell *minishell
-) {
-	const t_command	*command = current_command->content;
-
-	return (current_command->next != NULL
-		|| !is_builtin(command->path, minishell));
-}
-
-static pid_t	fork_process(
-	t_list *current_command,
-	t_minishell *minishell
-)
-{
-	pid_t			pid;
-
-	pid = 0;
-	if (is_fork_required(current_command, minishell))
-		pid = fork();
+	pid = fork();
 	if (pid == FORK_ERROR)
-		perror("fork");
-	return (pid);
+		return (perror("fork"), state->exit_status = EXIT_FAILURE, false);
+	if (pid == 0)
+		executor_child_process(state->current_command, &state->pipeline,
+			minishell);
+	state->last_child_pid = pid;
+	return (true);
 }
 
-static void	setup_child_input(
-	t_pipeline *pipeline
-)
-{
-	if (pipeline->prev_read_fd != -1)
-	{
-		dup2(pipeline->prev_read_fd, STDIN_FILENO);
-		close(pipeline->prev_read_fd);
-	}
-}
-
-static void	setup_child_output(
-	t_list *current_command,
-	t_pipeline *pipeline
-)
-{
-	if (current_command->next)
-	{
-		dup2(pipeline->pipefd[WRITE_PIPE], STDOUT_FILENO);
-		close(pipeline->pipefd[READ_PIPE]);
-		close(pipeline->pipefd[WRITE_PIPE]);
-	}
-}
-
-static void	child_process(
-	t_list *current_command,
-	t_pipeline *pipeline,
+static void	run_command_in_parent(
+	t_exec_state *state,
 	t_minishell *minishell
 )
 {
-	uint8_t			exit_status;
-	const t_command	*command = current_command->content;
+	t_command	*command;
+	int			saved_stdin;
+	int			saved_stdout;
+	int			saved_stderr;
 
-	setup_child_input(pipeline);
-	setup_child_output(current_command, pipeline);
-	exit_status = execute_command(command, minishell);
-	if (is_fork_required(current_command, minishell))
-		exit(exit_status);
+	command = state->current_command->content;
+	if (!executor_apply_redirections(command, &saved_stdin, &saved_stdout,
+			&saved_stderr))
+		state->exit_status = EXIT_FAILURE;
+	else
+		state->exit_status = executor_execute_command(command, minishell);
+	executor_restore_redirections(saved_stdin, saved_stdout, saved_stderr);
 }
 
-static void	parent_cleanup(
-	t_list *current_command,
-	t_pipeline *pipeline
+static bool	run_current_command(
+	t_exec_state *state,
+	t_minishell *minishell
 )
 {
-	if (pipeline->prev_read_fd != -1)
-		close(pipeline->prev_read_fd);
-	if (current_command->next)
+	bool		should_fork;
+
+	if (executor_create_pipe_if_needed(state->current_command,
+			&state->pipeline) == PIPE_ERROR)
+		return (state->exit_status = EXIT_FAILURE, false);
+	should_fork = executor_is_fork_required(state->current_command,
+			&state->pipeline, minishell);
+	if (should_fork)
 	{
-		close(pipeline->pipefd[WRITE_PIPE]);
-		pipeline->prev_read_fd = pipeline->pipefd[READ_PIPE];
+		if (!fork_current_command(state, minishell))
+			return (false);
 	}
 	else
-		pipeline->prev_read_fd = -1;
-}
-
-static uint8_t	wait_for_children(void)
-{
-	uint8_t	exit_status;
-	int		status;
-
-	exit_status = EXIT_SUCCESS;
-	while (wait(&status) > 0)
-	{
-		if (WIFEXITED(status))
-			exit_status = WEXITSTATUS(status);
-	}
-	return (exit_status);
+		run_command_in_parent(state, minishell);
+	executor_parent_cleanup(state->current_command, &state->pipeline);
+	state->current_command = state->current_command->next;
+	return (true);
 }
 
 uint8_t	execute(
@@ -205,26 +88,25 @@ uint8_t	execute(
 	t_minishell *minishell
 )
 {
-	uint8_t		exit_status;
-	t_pipeline	pipeline;
-	t_list		*current_command;
-	pid_t		pid;
+	t_exec_state	state;
 
-	pipeline.prev_read_fd = -1;
-	current_command = command_list;
-	while (current_command)
+	init_exec_state(&state, command_list);
+	if (!executor_prepare_heredocs(command_list, minishell, &state.exit_status))
 	{
-		if (create_pipe_if_needed(current_command, &pipeline) == PIPE_ERROR)
-			break ;
-		pid = fork_process(current_command, minishell);
-		if (pid == FORK_ERROR)
-			break ;
-		if (pid == 0)
-			child_process(current_command, &pipeline, minishell);
-		parent_cleanup(current_command, &pipeline);
-		current_command = current_command->next;
+		minishell->exit_status = state.exit_status;
+		ft_lstclear(&command_list, (void (*)(void *))executor_cmdfree);
+		return (state.exit_status);
 	}
-	exit_status = wait_for_children();
-	ft_lstclear(&command_list, (void (*)(void *))cmdfree);
-	return (exit_status);
+	minishell_set_execution_signals();
+	while (state.current_command)
+	{
+		if (!run_current_command(&state, minishell))
+			break ;
+	}
+	if (state.last_child_pid > 0)
+		state.exit_status = executor_wait_for_children(state.last_child_pid);
+	minishell_set_interactive_signals();
+	minishell->exit_status = state.exit_status;
+	ft_lstclear(&command_list, (void (*)(void *))executor_cmdfree);
+	return (state.exit_status);
 }

src/executor/heredoc.c

@@ -0,0 +1,65 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   heredoc.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 17:50:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 17:50:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "heredoc_internal.h"
+#include "errors.h"
+
+static bool	prepare_heredoc_redirection(t_redirection *rd,
+		t_minishell *minishell, uint8_t *exit_status)
+{
+	char	*path;
+	int		fd;
+
+	path = NULL;
+	fd = executor_heredoc_open_tmp(&path);
+	if (fd == -1)
+		return (perror("open"), *exit_status = EXIT_FAILURE, false);
+	if (!executor_heredoc_fill_tmp(fd, rd, minishell, exit_status))
+		return (executor_heredoc_discard_tmp(fd, path), false);
+	return (executor_heredoc_finalize_tmp(rd, fd, path, exit_status));
+}
+
+static bool	process_command_heredocs(t_command *command, t_minishell *minishell,
+		uint8_t *exit_status)
+{
+	t_list			*redir_node;
+	t_redirection	*rd;
+
+	redir_node = command->redirections;
+	while (redir_node != NULL)
+	{
+		rd = (t_redirection *)redir_node->content;
+		if (rd->type == TOKEN_HEREDOC
+			&& !prepare_heredoc_redirection(rd, minishell, exit_status))
+			return (false);
+		redir_node = redir_node->next;
+	}
+	return (true);
+}
+
+bool	executor_prepare_heredocs(t_list *command_list, t_minishell *minishell,
+		uint8_t *exit_status)
+{
+	t_command	*command;
+
+	*exit_status = EXIT_SUCCESS;
+	minishell_set_heredoc_signals();
+	while (command_list != NULL)
+	{
+		command = (t_command *)command_list->content;
+		if (!process_command_heredocs(command, minishell, exit_status))
+			return (minishell_set_interactive_signals(), false);
+		command_list = command_list->next;
+	}
+	minishell_set_interactive_signals();
+	return (true);
+}

src/executor/heredoc_expand.c

@@ -0,0 +1,107 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   heredoc_expand.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 17:30:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 17:30:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+#include "variables.h"
+#include "errors.h"
+
+static bool	is_var_char(char c)
+{
+	return (ft_isalnum(c) || c == '_');
+}
+
+static bool	append_text(char **result, const char *value)
+{
+	char	*joined;
+
+	joined = ft_strnjoin(2, *result, (char *)value);
+	if (joined == NULL)
+	{
+		free(*result);
+		*result = NULL;
+		return (false);
+	}
+	free(*result);
+	*result = joined;
+	return (true);
+}
+
+static char	*expand_variable(const char *line, size_t *i, t_minishell *msh)
+{
+	char	*name;
+	char	*value;
+	size_t	start;
+
+	(*i)++;
+	if (line[*i] == '?')
+		return ((*i)++, ft_itoa(msh->exit_status));
+	if (line[*i] == '\0' || !is_var_char(line[*i]))
+		return (ft_strdup("$"));
+	start = *i;
+	while (line[*i] != '\0' && is_var_char(line[*i]))
+		(*i)++;
+	name = ft_substr(line, start, *i - start);
+	if (name == NULL)
+		return (NULL);
+	value = get_var(name, msh);
+	free(name);
+	if (value == NULL)
+		value = "";
+	return (ft_strdup(value));
+}
+
+static char	*expand_literal_char(const char *line, size_t *i,
+		bool *in_single, bool *in_double)
+{
+	char	value[2];
+
+	if (line[*i] == '\'' && !*in_double)
+		*in_single = !*in_single;
+	else if (line[*i] == '\"' && !*in_single)
+		*in_double = !*in_double;
+	value[0] = line[*i];
+	value[1] = '\0';
+	(*i)++;
+	return (ft_strdup(value));
+}
+
+char	*executor_expand_heredoc_line(
+	const char *line,
+	t_minishell *minishell
+)
+{
+	char	*result;
+	char	*expanded;
+	size_t	i;
+	bool	in_single;
+	bool	in_double;
+
+	result = ft_strdup("");
+	if (result == NULL)
+		return (malloc_error(), NULL);
+	i = 0;
+	in_single = false;
+	in_double = false;
+	while (line[i] != '\0')
+	{
+		if (line[i] == '$' && !in_single)
+			expanded = expand_variable(line, &i, minishell);
+		else
+			expanded = expand_literal_char(line, &i, &in_single, &in_double);
+		if (expanded == NULL)
+			return (free(result), malloc_error(), NULL);
+		if (!append_text(&result, expanded))
+			return (free(expanded), malloc_error(), NULL);
+		free(expanded);
+	}
+	return (result);
+}

src/executor/heredoc_file.c

@@ -0,0 +1,77 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   heredoc_file.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 17:50:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 17:50:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "heredoc_internal.h"
+#include <errno.h>
+#include "variables.h"
+
+static char	*build_tmp_path(unsigned int id)
+{
+	char	*suffix;
+	char	*path;
+
+	suffix = ft_uitoa(id);
+	if (suffix == NULL)
+		return (errno = ENOMEM, NULL);
+	path = ft_strnjoin(2, "/tmp/minishell_heredoc_", suffix);
+	free(suffix);
+	if (path == NULL)
+		return (errno = ENOMEM, NULL);
+	return (path);
+}
+
+int	executor_heredoc_open_tmp(char **path_out)
+{
+	static unsigned int	counter;
+	char				*path;
+	unsigned int		attempts;
+	int					fd;
+
+	attempts = 0;
+	while (attempts++ < 10000)
+	{
+		path = build_tmp_path(counter++);
+		if (path == NULL)
+			return (-1);
+		fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600);
+		if (fd != -1)
+			return (*path_out = path, fd);
+		free(path);
+		if (errno != EEXIST)
+			return (-1);
+	}
+	errno = EEXIST;
+	return (-1);
+}
+
+void	executor_heredoc_discard_tmp(int fd, char *path)
+{
+	if (fd >= 0)
+		close(fd);
+	if (path != NULL)
+	{
+		unlink(path);
+		free(path);
+	}
+}
+
+bool	executor_heredoc_finalize_tmp(t_redirection *rd, int fd, char *path,
+		uint8_t *exit_status)
+{
+	if (close(fd) == -1)
+		return (executor_heredoc_discard_tmp(-1, path), perror("close"),
+			*exit_status = EXIT_FAILURE, false);
+	free(rd->target);
+	rd->target = path;
+	rd->heredoc_ready = true;
+	return (true);
+}

src/executor/heredoc_input.c

@@ -0,0 +1,80 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   heredoc_input.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 17:50:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 17:50:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "heredoc_internal.h"
+#include "errors.h"
+
+static bool	write_all(int fd, const char *buffer, size_t len)
+{
+	size_t	total;
+	ssize_t	written;
+
+	total = 0;
+	while (total < len)
+	{
+		written = write(fd, buffer + total, len - total);
+		if (written <= 0)
+			return (false);
+		total += written;
+	}
+	return (true);
+}
+
+static bool	write_heredoc_line(int fd, const char *line)
+{
+	if (!write_all(fd, line, ft_strlen(line)))
+		return (false);
+	return (write_all(fd, "\n", 1));
+}
+
+static bool	handle_heredoc_line(int fd, char *line, t_redirection *rd,
+		t_minishell *minishell)
+{
+	char	*expanded;
+
+	expanded = line;
+	if (rd->heredoc_expand)
+	{
+		expanded = executor_expand_heredoc_line(line, minishell);
+		free(line);
+		if (expanded == NULL)
+			return (false);
+	}
+	if (!write_heredoc_line(fd, expanded))
+		return (free(expanded), perror("write"), false);
+	free(expanded);
+	return (true);
+}
+
+bool	executor_heredoc_fill_tmp(int fd, t_redirection *rd,
+		t_minishell *minishell, uint8_t *exit_status)
+{
+	char	*line;
+
+	while (1)
+	{
+		line = executor_heredoc_read_line(minishell);
+		if (minishell_consume_sigint())
+			return (free(line), *exit_status = 130, false);
+		if (line == NULL)
+		{
+			if (!isatty(STDIN_FILENO))
+				minishell->exit = true;
+			return (ft_eprintf("minishell: warning: here-document delimited by "
+					"end-of-file (wanted `%s')\n", rd->target), true);
+		}
+		if (ft_strcmp(line, rd->target) == 0)
+			return (free(line), true);
+		if (!handle_heredoc_line(fd, line, rd, minishell))
+			return (*exit_status = EXIT_FAILURE, false);
+	}
+}

src/executor/heredoc_internal.h

@@ -0,0 +1,26 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   heredoc_internal.h                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 17:50:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 17:50:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef HEREDOC_INTERNAL_H
+# define HEREDOC_INTERNAL_H
+
+# include "executor.h"
+
+char	*executor_heredoc_read_line(t_minishell *minishell);
+int		executor_heredoc_open_tmp(char **path_out);
+void	executor_heredoc_discard_tmp(int fd, char *path);
+bool	executor_heredoc_finalize_tmp(t_redirection *rd, int fd, char *path,
+			uint8_t *exit_status);
+bool	executor_heredoc_fill_tmp(int fd, t_redirection *rd,
+			t_minishell *minishell, uint8_t *exit_status);
+
+#endif

src/executor/heredoc_readline.c

@@ -0,0 +1,89 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   heredoc_readline.c                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/15 00:20:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/15 00:20:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "heredoc_internal.h"
+#include "variables.h"
+#include <errno.h>
+
+static bool	append_char(char **line, size_t *len, char c)
+{
+	char	*new_line;
+	size_t	i;
+
+	new_line = (char *)malloc(*len + 2);
+	if (new_line == NULL)
+		return (free(*line), *line = NULL, false);
+	i = 0;
+	while (i < *len)
+	{
+		new_line[i] = (*line)[i];
+		i++;
+	}
+	new_line[*len] = c;
+	new_line[*len + 1] = '\0';
+	free(*line);
+	*line = new_line;
+	(*len)++;
+	return (true);
+}
+
+static char	*read_line_stdin(void)
+{
+	char	*line;
+	char	c;
+	size_t	len;
+	ssize_t	nread;
+
+	line = ft_strdup("");
+	if (line == NULL)
+		return (NULL);
+	len = 0;
+	errno = 0;
+	nread = read(STDIN_FILENO, &c, 1);
+	while (nread > 0)
+	{
+		if (c == '\n')
+			return (line);
+		if (!append_char(&line, &len, c))
+			return (NULL);
+		nread = read(STDIN_FILENO, &c, 1);
+	}
+	if (nread == -1 && errno == EINTR)
+		return (line);
+	if (len > 0)
+		return (line);
+	return (free(line), NULL);
+}
+
+char	*executor_heredoc_read_line(t_minishell *minishell)
+{
+	char	*prompt;
+	char	*line;
+	size_t	len;
+
+	if (!isatty(STDIN_FILENO))
+	{
+		line = get_next_line(STDIN_FILENO);
+		if (line == NULL)
+			return (NULL);
+		len = ft_strlen(line);
+		if (len > 0 && line[len - 1] == '\n')
+			line[len - 1] = '\0';
+		return (line);
+	}
+	prompt = get_var("PS2", minishell);
+	if (prompt == NULL)
+		prompt = DEFAULT_PS2;
+	if (write(STDOUT_FILENO, prompt, ft_strlen(prompt)) == -1)
+		return (NULL);
+	return (read_line_stdin());
+}

src/executor/path_resolver.c

@@ -0,0 +1,78 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   path_resolver.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/11 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 13:16:15 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+#include "variables.h"
+
+static bool	is_path_explicit(
+	const char *command_name
+)
+{
+	return (command_name != NULL && ft_strchr(command_name, '/') != NULL);
+}
+
+static char	*resolve_path_from_env(
+	const char *command_name,
+	t_minishell *minishell
+)
+{
+	char	*command_path;
+	char	**path_env;
+	char	*path_value;
+	size_t	i;
+
+	path_value = get_env("PATH", minishell);
+	if (path_value == NULL)
+		return (NULL);
+	path_env = ft_split(path_value, ':');
+	if (path_env == NULL)
+		return (NULL);
+	command_path = NULL;
+	i = -1;
+	while (command_name[0] != 0 && !command_path && path_env[++i] != NULL)
+	{
+		command_path = ft_strnjoin(3, path_env[i], "/", command_name);
+		if (command_path != NULL && access(command_path, X_OK) != EXIT_SUCCESS)
+		{
+			free(command_path);
+			command_path = NULL;
+		}
+	}
+	ft_free_split(path_env);
+	return (command_path);
+}
+
+static char	*resolve_explicit_path(
+	const char *command_name
+)
+{
+	if (access(command_name, F_OK) != EXIT_SUCCESS)
+		return (NULL);
+	if (access(command_name, X_OK) != EXIT_SUCCESS)
+		return (NULL);
+	return (ft_strdup(command_name));
+}
+
+char	*executor_resolve_command_path(
+	const t_command *command,
+	t_minishell *minishell
+)
+{
+	const char	*command_name;
+
+	if (command == NULL || command->argv == NULL || command->argv[0] == NULL)
+		return (NULL);
+	command_name = command->argv[0];
+	if (is_path_explicit(command_name))
+		return (resolve_explicit_path(command_name));
+	return (resolve_path_from_env(command_name, minishell));
+}

src/executor/pipeline_helpers.c

@@ -0,0 +1,73 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   pipeline_helpers.c                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/11 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/11 00:00:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+#include "builtins.h"
+
+int	executor_create_pipe_if_needed(
+	t_list *current_command,
+	t_pipeline *pipeline
+)
+{
+	if (!current_command->next)
+		return (0);
+	if (pipe(pipeline->pipefd) == PIPE_ERROR)
+		return (perror("pipe"), PIPE_ERROR);
+	return (0);
+}
+
+bool	executor_is_builtin_command(
+	const t_command *command,
+	t_minishell *minishell
+)
+{
+	if (command == NULL || command->argv == NULL || command->argv[0] == NULL)
+		return (false);
+	return (is_builtin(command->argv[0], minishell));
+}
+
+bool	executor_is_fork_required(
+	t_list *current_command,
+	const t_pipeline *pipeline,
+	t_minishell *minishell
+)
+{
+	const t_command	*command;
+
+	command = current_command->content;
+	return (pipeline->prev_read_fd != -1 || current_command->next != NULL
+		|| !executor_is_builtin_command(command, minishell));
+}
+
+void	executor_setup_child_input(
+	t_pipeline *pipeline
+)
+{
+	if (pipeline->prev_read_fd != -1)
+	{
+		dup2(pipeline->prev_read_fd, STDIN_FILENO);
+		close(pipeline->prev_read_fd);
+	}
+}
+
+void	executor_setup_child_output(
+	t_list *current_command,
+	t_pipeline *pipeline
+)
+{
+	if (current_command->next)
+	{
+		dup2(pipeline->pipefd[WRITE_PIPE], STDOUT_FILENO);
+		close(pipeline->pipefd[READ_PIPE]);
+		close(pipeline->pipefd[WRITE_PIPE]);
+	}
+}

src/executor/process_helpers.c

@@ -0,0 +1,95 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   process_helpers.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/11 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/11 00:00:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+
+static void	set_signal_exit_status(
+	int status,
+	uint8_t *exit_status
+)
+{
+	if (WTERMSIG(status) == SIGINT)
+		write(STDOUT_FILENO, "\n", 1);
+	else if (WTERMSIG(status) == SIGQUIT)
+	{
+		if (WCOREDUMP(status))
+			write(STDERR_FILENO, "Quit (core dumped)\n", 19);
+		else
+			write(STDERR_FILENO, "Quit\n", 5);
+	}
+	*exit_status = 128 + WTERMSIG(status);
+}
+
+static void	set_last_child_status(
+	int status,
+	uint8_t *exit_status
+)
+{
+	if (WIFEXITED(status))
+		*exit_status = WEXITSTATUS(status);
+	else if (WIFSIGNALED(status))
+		set_signal_exit_status(status, exit_status);
+}
+
+void	executor_child_process(
+	t_list *current_command,
+	t_pipeline *pipeline,
+	t_minishell *minishell
+)
+{
+	uint8_t		exit_status;
+	t_command	*command;
+
+	command = current_command->content;
+	minishell_set_child_signals();
+	executor_setup_child_input(pipeline);
+	executor_setup_child_output(current_command, pipeline);
+	if (!executor_apply_redirections(command, NULL, NULL, NULL))
+		exit(EXIT_FAILURE);
+	exit_status = executor_execute_command(command, minishell);
+	exit(exit_status);
+}
+
+void	executor_parent_cleanup(
+	t_list *current_command,
+	t_pipeline *pipeline
+)
+{
+	if (pipeline->prev_read_fd != -1)
+		close(pipeline->prev_read_fd);
+	if (current_command->next)
+	{
+		close(pipeline->pipefd[WRITE_PIPE]);
+		pipeline->prev_read_fd = pipeline->pipefd[READ_PIPE];
+	}
+	else
+		pipeline->prev_read_fd = -1;
+}
+
+uint8_t	executor_wait_for_children(
+	pid_t last_child_pid
+)
+{
+	uint8_t	exit_status;
+	int		status;
+	pid_t	pid;
+
+	exit_status = EXIT_SUCCESS;
+	pid = wait(&status);
+	while (last_child_pid > 0 && pid > 0)
+	{
+		if (pid == last_child_pid)
+			set_last_child_status(status, &exit_status);
+		pid = wait(&status);
+	}
+	return (exit_status);
+}

src/executor/redirections.c

@@ -0,0 +1,120 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   redirections.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/12 00:00:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/12 00:00:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "executor.h"
+#include <errno.h>
+
+static int	open_redirection_target(
+	const t_redirection *redirection
+)
+{
+	if (redirection->type == TOKEN_REDIRECT_IN)
+		return (open(redirection->target, O_RDONLY));
+	if (redirection->type == TOKEN_HEREDOC)
+		return (open(redirection->target, O_RDONLY));
+	if (redirection->type == TOKEN_REDIRECT_OUT)
+		return (open(redirection->target, O_WRONLY | O_CREAT | O_TRUNC, 0644));
+	if (redirection->type == TOKEN_APPEND)
+		return (open(redirection->target, O_WRONLY | O_CREAT | O_APPEND, 0644));
+	errno = EINVAL;
+	return (-1);
+}
+
+static bool	backup_fd_if_needed(
+	int io_number,
+	int *saved_fd
+)
+{
+	if (saved_fd == NULL || *saved_fd != -1)
+		return (true);
+	*saved_fd = dup(io_number);
+	if (*saved_fd == -1)
+		return (perror("dup"), false);
+	return (true);
+}
+
+static bool	apply_redirection(
+	const t_redirection *redirection,
+	int *saved_stdin,
+	int *saved_stdout,
+	int *saved_stderr
+)
+{
+	int	fd;
+
+	if (redirection == NULL || redirection->target == NULL)
+		return (false);
+	if ((redirection->io_number == STDIN_FILENO
+			&& !backup_fd_if_needed(STDIN_FILENO, saved_stdin))
+		|| (redirection->io_number == STDOUT_FILENO
+			&& !backup_fd_if_needed(STDOUT_FILENO, saved_stdout))
+		|| (redirection->io_number == STDERR_FILENO
+			&& !backup_fd_if_needed(STDERR_FILENO, saved_stderr)))
+		return (false);
+	fd = open_redirection_target(redirection);
+	if (fd == -1)
+		return (perror(redirection->target), false);
+	if (dup2(fd, redirection->io_number) == -1)
+		return (close(fd), perror("dup2"), false);
+	return (close(fd), true);
+}
+
+bool	executor_apply_redirections(
+	const t_command *command,
+	int *saved_stdin,
+	int *saved_stdout,
+	int *saved_stderr
+)
+{
+	t_list	*node;
+
+	if (saved_stdin != NULL)
+		*saved_stdin = -1;
+	if (saved_stdout != NULL)
+		*saved_stdout = -1;
+	if (saved_stderr != NULL)
+		*saved_stderr = -1;
+	if (command == NULL)
+		return (true);
+	node = command->redirections;
+	while (node != NULL
+		&& apply_redirection((t_redirection *)node->content,
+			saved_stdin, saved_stdout, saved_stderr))
+		node = node->next;
+	return (node == NULL);
+}
+
+void	executor_restore_redirections(
+	int saved_stdin,
+	int saved_stdout,
+	int saved_stderr
+)
+{
+	if (saved_stdin != -1)
+	{
+		if (dup2(saved_stdin, STDIN_FILENO) == -1)
+			perror("dup2");
+		close(saved_stdin);
+	}
+	if (saved_stdout != -1)
+	{
+		if (dup2(saved_stdout, STDOUT_FILENO) == -1)
+			perror("dup2");
+		close(saved_stdout);
+	}
+	if (saved_stderr != -1)
+	{
+		if (dup2(saved_stderr, STDERR_FILENO) == -1)
+			perror("dup2");
+		close(saved_stderr);
+	}
+}

src/minishell.c

@@ -6,7 +6,7 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/10/20 20:51:33 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/09 18:48:34 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/14 12:57:00 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,6 +20,7 @@ void	minishell_init(
 	char		**envp
 ){
 	ft_bzero(minishell, sizeof(t_minishell));
+	set_intp(minishell);
 	set_envp(envp, minishell);
 	set_builtins(minishell);
 	if (minishell->variables.environment == NULL || minishell->builtins == NULL)
@@ -28,28 +29,30 @@ void	minishell_init(
 
 void	minishell_run(
 	t_minishell	*minishell
-){
+)
+{
 	char	*line;
 	t_list	*commands;
 
 	if (minishell == NULL)
-	{
-		minishell->exit_status = EXIT_FAILURE;
 		return ;
-	}
+	minishell_set_interactive_signals();
 	while (!minishell->exit)
 	{
-		line = readline(DEFAULT_PS1);
-		if (line != NULL)
+		if (isatty(STDIN_FILENO))
+			line = readline(get_var("PS1", minishell));
+		else
+			line = get_next_line(STDIN_FILENO);
+		handle_sigint_status(minishell);
+		if (handle_eof(line, minishell))
+			continue ;
+		if (*line != '\0')
 		{
-			if (*line != '\0')
-			{
-				add_history(line);
-				commands = parse(line, minishell);
-				execute(commands, minishell);
-			}
-			free(line);
+			add_history(line);
+			commands = parse(line, minishell);
+			minishell->exit_status = execute(commands, minishell);
 		}
+		free(line);
 	}
 }
 
@@ -57,6 +60,8 @@ void	minishell_clear(
 	t_minishell	*minishell
 ){
 	rl_clear_history();
+	if (minishell->variables.internal != NULL)
+		ft_hashmap_clear(&minishell->variables.internal, free);
 	if (minishell->variables.environment != NULL)
 		ft_hashmap_clear(&minishell->variables.environment, free);
 	if (minishell->builtins != NULL)

src/minishell_helpers.c

@@ -0,0 +1,37 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   minishell_helpers.c                                :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:09:23 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 13:03:15 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+#include "core.h"
+
+void	handle_sigint_status(
+	t_minishell *minishell
+)
+{
+	if (!minishell_consume_sigint())
+		return ;
+	minishell->exit_status = 130;
+}
+
+bool	handle_eof(
+	char *line,
+	t_minishell *minishell
+)
+{
+	if (line != NULL)
+		return (false);
+	if (isatty(STDIN_FILENO))
+		ft_putendl("exit");
+	free(line);
+	minishell->exit = true;
+	return (true);
+}

src/parser/lexer.c

@@ -13,26 +13,20 @@
 #include "core.h"
 #include "parser.h"
 
-static t_token *tokenize(const char *line, size_t *start);
-static t_token_type get_token_type(const char *str);
-static t_token *token_new(t_token_type type, char *text);
-void token_clear(t_token *token);
-static t_token *read_token(t_token_type type, const char *line, size_t *i);
-static t_token *read_word(const char *line, size_t *i);
-static inline bool is_meta(char c);
+static t_token	*tokenize(const char *line, size_t *start);
 
 /**
  * @brief Converts a command line string into a list of tokens.
  * 
  * @return A list of tokens or NULL on error.
  */
-t_list *lex(
+t_list	*lex(
 	const char *line
 )
 {
-	t_list *tokens;
-	t_token *token;
-	size_t i;
+	t_list	*tokens;
+	t_token	*token;
+	size_t	i;
 
 	tokens = NULL;
 	i = 0;
@@ -56,13 +50,13 @@ t_list *lex(
 /**
  * @return A new token or NULL on error.
  */
-static t_token *tokenize(
+static t_token	*tokenize(
 	const char *line,
 	size_t *start
 )
 {
-	t_token *token;
-	t_token_type type;
+	t_token			*token;
+	t_token_type	type;
 
 	if (line == NULL || line[*start] == '\0')
 		return (NULL);
@@ -73,106 +67,3 @@ static t_token *tokenize(
 		token = read_word(line, start);
 	return (token);
 }
-
-static t_token_type get_token_type(
-	const char *str
-)
-{
-	if (str == NULL || str[0] == '\0')
-		return (TOKEN_WORD);
-	if (str[0] == '|')
-		return (TOKEN_PIPE);
-	if (str[0] == '<')
-	{
-		if (str[1] == '<')
-			return (TOKEN_HEREDOC);
-		return (TOKEN_REDIRECT_IN);
-	}
-	if (str[0] == '>')
-	{
-		if (str[1] == '>')
-			return (TOKEN_APPEND);
-		return (TOKEN_REDIRECT_OUT);
-	}
-	return (TOKEN_WORD);
-}
-
-static t_token *token_new(
-	t_token_type type,
-	char *text
-)
-{
-	t_token *token;
-
-	token = (t_token *)malloc(sizeof(t_token));
-	if (token == NULL)
-		return (NULL);
-	token->type = type;
-	token->value = text;
-	if (token->type == TOKEN_WORD && token->value == NULL)
-	{
-		free(token);
-		return (NULL);
-	}
-	return (token);
-}
-
-void token_clear(
-	t_token *token
-)
-{
-	if (token != NULL)
-	{
-		free(token->value);
-		free(token);
-	}
-}
-
-static t_token *read_token(
-	t_token_type type,
-	const char *line,
-	size_t *i
-)
-{
-	const size_t	start = *i;
-	size_t 			end;
-
-	while (is_meta(line[*i]))
-		(*i)++;
-	end = *i;
-	while (ft_isspace(line[*i]))
-		(*i)++;
-	return (token_new(type, ft_substr(line, start, end - start)));
-}
-
-static t_token *read_word(
-	const char *line,
-	size_t *i
-)
-{
-	const size_t start = *i;
-	bool in_single_quote;
-	bool in_double_quote;
-
-	in_single_quote = false;
-	in_double_quote = false;
-	while (line[*i] != '\0')
-	{
-		if (line[*i] == '\'' && !in_double_quote)
-			in_single_quote = !in_single_quote;
-		else if (line[*i] == '"' && !in_single_quote)
-			in_double_quote = !in_double_quote;
-		else if (!in_single_quote && !in_double_quote
-			&& (isspace(line[*i]) || is_meta(line[*i])))
-			break;
-		(*i)++;
-	}
-	return (token_new(TOKEN_WORD, ft_substr(line, start, *i - start)));
-}
-
-static inline bool is_meta(
-	char c
-)
-{
-	return (c == '|' || c == '<' || c == '>');
-}

src/parser/lexer_reader.c

@@ -0,0 +1,64 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   lexer_reader.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:13:23 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/13 21:13:23 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+
+static inline bool	is_meta(char c);
+
+t_token	*read_token(
+	t_token_type type,
+	const char *line,
+	size_t *i
+)
+{
+	const size_t	start = *i;
+	size_t			end;
+
+	while (is_meta(line[*i]))
+		(*i)++;
+	end = *i;
+	while (ft_isspace(line[*i]))
+		(*i)++;
+	return (token_new(type, ft_substr(line, start, end - start)));
+}
+
+t_token	*read_word(
+	const char *line,
+	size_t *i
+)
+{
+	const size_t	start = *i;
+	bool			in_single_quote;
+	bool			in_double_quote;
+
+	in_single_quote = false;
+	in_double_quote = false;
+	while (line[*i] != '\0')
+	{
+		if (line[*i] == '\'' && !in_double_quote)
+			in_single_quote = !in_single_quote;
+		else if (line[*i] == '"' && !in_single_quote)
+			in_double_quote = !in_double_quote;
+		else if (!in_single_quote && !in_double_quote
+			&& (isspace(line[*i]) || is_meta(line[*i])))
+			break ;
+		(*i)++;
+	}
+	return (token_new(TOKEN_WORD, ft_substr(line, start, *i - start)));
+}
+
+static inline bool	is_meta(
+	char c
+)
+{
+	return (c == '|' || c == '<' || c == '>');
+}

src/parser/lexer_token.c

@@ -0,0 +1,67 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   lexer_token.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:12:49 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/13 21:12:49 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+
+t_token_type	get_token_type(
+	const char *str
+)
+{
+	if (str == NULL || str[0] == '\0')
+		return (TOKEN_WORD);
+	if (str[0] == '|')
+		return (TOKEN_PIPE);
+	if (str[0] == '<')
+	{
+		if (str[1] == '<')
+			return (TOKEN_HEREDOC);
+		return (TOKEN_REDIRECT_IN);
+	}
+	if (str[0] == '>')
+	{
+		if (str[1] == '>')
+			return (TOKEN_APPEND);
+		return (TOKEN_REDIRECT_OUT);
+	}
+	return (TOKEN_WORD);
+}
+
+t_token	*token_new(
+	t_token_type type,
+	char *text
+)
+{
+	t_token	*token;
+
+	token = (t_token *)malloc(sizeof(t_token));
+	if (token == NULL)
+		return (NULL);
+	token->type = type;
+	token->value = text;
+	if (token->type == TOKEN_WORD && token->value == NULL)
+	{
+		free(token);
+		return (NULL);
+	}
+	return (token);
+}
+
+void	token_clear(
+	t_token *token
+)
+{
+	if (token != NULL)
+	{
+		free(token->value);
+		free(token);
+	}
+}

src/parser/parser.c

@@ -6,33 +6,16 @@
 /*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/10/22 18:37:38 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/12 20:55:49 by sede-san         ###   ########.fr       */
+/*   Updated: 2026/02/13 21:22:06 by sede-san         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "parser.h"
 #include "errors.h"
 
-static t_list *parse_tokens(
-	t_list *tokens
-);
-
-static t_list	*ft_lstfind(
-	t_list *lst,
-	bool (*pre)(void *)
-);
-
-static void expand_variable(
-	char **argument,
-	int *i,
-	t_minishell *minishell
-);
-
-static void	expand(
-	t_list **commands,
-	t_minishell *minishell
-);
-
+static t_list	*parse_tokens(t_list *tokens);
+static bool		parse_add_command(t_list **commands, t_list **current_token);
+static bool		parse_advance_token(t_list **commands, t_list **current_token);
 
 /**
  * @brief Converts a command line string into a list of commands.
@@ -42,13 +25,13 @@ static void	expand(
  *
  * @return A list of commands or `NULL` on error.
  */
-t_list *parse(
+t_list	*parse(
 	char *line,
 	t_minishell *minishell
 )
 {
-	t_list *commands;
-	t_list *tokens;
+	t_list	*commands;
+	t_list	*tokens;
 
 	if (line == NULL)
 		return (NULL);
@@ -63,482 +46,66 @@ t_list *parse(
  * @brief Converts a list of tokens into a list of commands.
  *
  * @param tokens    The list of tokens to parse.
- * @param minishell The minishell instance.
  *
  * @return A list of commands or `NULL` on error.
  */
-static t_list *parse_tokens(
+static t_list	*parse_tokens(
 	t_list *tokens
 )
 {
-	t_list		*commands;
-	t_command	*command;
-	t_list		*current_token;
-	t_list		*new_command;
+	t_list	*commands;
+	t_list	*current_token;
 
 	if (tokens == NULL)
 		return (NULL);
 	commands = NULL;
 	current_token = tokens;
-	while (current_token != NULL)
-	{
-		command = command_new(&current_token);
-		if (command == NULL)
-		{
-			ft_lstclear(&commands, (void (*)(void *))command_clear);
-			return (NULL);
-		}
-		new_command = ft_lstnew(command);
-		if (new_command == NULL)
-		{
-			command_clear(command);
-			ft_lstclear(&commands, (void (*)(void *))command_clear);
-			return (malloc_error(), NULL);
-		}
-		ft_lstadd_back(&commands, new_command);
-		if (current_token != NULL)
-		{
-			if (current_token->next == NULL)
-				syntax_error_unexpected_token((t_token *)current_token->content);
-			current_token = current_token->next;
-		}
-	}
+	if (((t_token *)current_token->content)->type == TOKEN_PIPE)
+		return (syntax_error_unexpected_token(
+				(t_token *)current_token->content), NULL);
+	while (current_token != NULL && parse_add_command(&commands, &current_token)
+		&& parse_advance_token(&commands, &current_token))
+		continue ;
+	if (current_token != NULL)
+		return (NULL);
 	return (commands);
 }
 
-static void expand_variable(
-	char **argument,
-	int *i,
-	t_minishell *minishell
-)
-{
-	char		*expanded;
-	char		*variable;
-	char		*variable_name;
-	const int	start = *i + 1;
-	int			end;
-
-	end = start;
-	while (ft_isalnum((*argument)[end]))
-		end++;
-	variable_name = ft_substr(*argument, start, end - start);
-	if (variable_name == NULL)
-		return (minishell->exit = true, malloc_error());
-	variable = get_env(variable_name, minishell);
-	free(variable_name);
-	if (variable == NULL)
-		variable = "";
-	expanded = ft_strnjoin(3,
-		ft_substr(*argument, 0, *i),
-		variable,
-		ft_substr(*argument,end, ft_strlen(*argument) - end));
-	if (expanded == NULL)
-		return (minishell->exit = true, malloc_error());
-	*i += ft_strlen(variable) - 1;
-	free(*argument);
-	*argument = expanded;
-}
-
-static void expand_argument(
-	char **argument,
-	t_minishell *minishell
-)
-{
-	bool	in_single_quote;
-	bool	in_double_quote;
-	int		i;
-	
-	in_single_quote = false;
-	in_double_quote = false;
-	i = 0;
-	while ((*argument)[i] != '\0')
-	{
-		if ((*argument)[i] == '$' && !in_single_quote)
-		{
-			expand_variable(argument, &i, minishell);
-			if (*argument == NULL)
-				return (minishell->exit = true, malloc_error());
-		}
-		else
-		{
-			if ((*argument)[i] == '\'' && !in_double_quote)
-				in_single_quote = !in_single_quote;
-			else if ((*argument)[i] == '"' && !in_single_quote)
-				in_double_quote = !in_double_quote;
-			i++;
-		}
-	}
-}
-
-static void	expand(
+static bool	parse_add_command(
 	t_list **commands,
-	t_minishell *minishell
+	t_list **current_token
 )
 {
-	t_list		*current_command;
 	t_command	*command;
-	int			i;
-	
-	current_command = *commands;
-	while (current_command != NULL)
-	{
-		command = (t_command *)current_command->content;
-		i = 0;
-		while (i < command->argc)
-		{
-			expand_argument(&command->argv[i], minishell);
-			if (command->argv[i] == NULL)
-				ft_lstclear(commands, (void (*)(void *))command_clear);
-			i++;
-		}
-		if (command == NULL)
-			return (ft_lstclear(commands, (void (*)(void *))command_clear));
-		current_command = current_command->next;
-	}
-}
+	t_list		*new_command;
 
-/**
- * @brief Creates a new command from a list of tokens.
- *
- * @param tokens The list of tokens to create the command from.
- *
- * @return A new command or NULL on error.
- *
- * @note The `tokens` pointer is moved to the next command's tokens.
- */
-t_command *command_new(
-	t_list **tokens
-)
-{
-	t_command *command;
-	t_list *current_token;
-	t_list *delimiter_token;
-
-	command = (t_command *)ft_calloc(1, sizeof(t_command));
+	command = command_new(current_token);
 	if (command == NULL)
-		return (NULL);
-	current_token = *tokens;
-	delimiter_token = ft_lstfind(current_token, (bool (*)(void *))is_pipe);
-	while (command != NULL && current_token != delimiter_token)
+		return (ft_lstclear(commands, (void (*)(void *))command_clear), false);
+	new_command = ft_lstnew(command);
+	if (new_command == NULL)
 	{
-		command_add_tokens(&command, &current_token);
+		command_clear(command);
+		return (ft_lstclear(commands, (void (*)(void *))command_clear),
+			malloc_error(), false);
 	}
-	*tokens = current_token;
-	return (command);
+	ft_lstadd_back(commands, new_command);
+	return (true);
 }
 
-/**
- * @brief Creates a new redirection from a list of tokens.
- *
- * @param tokens The list of tokens to create the redirection from.
- *
- * @return A new redirection or `NULL` on error.
- */
-t_redirection *redirection_new(
-	t_list **tokens
+static bool	parse_advance_token(
+	t_list **commands,
+	t_list **current_token
 )
 {
-	t_redirection	*redirection;
-	t_token			*token;
-
-	redirection = (t_redirection *)malloc(sizeof(t_redirection));
-	if (redirection == NULL)
-		return (malloc_error(), NULL);
-	token = (t_token *)(*tokens)->content;
-	redirection->type = token->type;
-	*tokens = (*tokens)->next;
-	if (*tokens == NULL)
+	if (*current_token == NULL)
+		return (true);
+	if ((*current_token)->next == NULL)
 	{
-		free(redirection);
-		return (syntax_error_unexpected_token(NULL), NULL);
+		ft_lstclear(commands, (void (*)(void *))command_clear);
+		return (syntax_error_unexpected_token(
+				(t_token *)(*current_token)->content), false);
 	}
-	token = (t_token *)(*tokens)->content;
-	if (token->type != TOKEN_WORD)
-	{
-		free(redirection);
-		while (*tokens != NULL)
-			*tokens = (*tokens)->next;
-		return (syntax_error_unexpected_token(token), NULL);
-	}
-	redirection->target = ft_strdup(token->value);
-	if (redirection->target == NULL)
-	{
-		free(redirection);
-		return (malloc_error(), NULL);
-	}
-	*tokens = (*tokens)->next;
-	return (redirection);
+	*current_token = (*current_token)->next;
+	return (true);
 }
-
-void redirection_clear(
-	t_redirection *redirection
-)
-{
-	if (redirection != NULL)
-	{
-		free(redirection->target);
-		free(redirection);
-	}
-}
-
-/**
- * @brief Adds a token to a command, updating the command's arguments and
- *        redirections as necessary.
- *
- * @param command The command to add the token to.
- * @param tokens  The list of tokens to add to the command.
- *
- * @note The `command` pointer can be free'd if there is an error while adding
- *       the token.
- */
-void command_add_tokens(
-	t_command **command,
-	t_list **tokens
-)
-{
-	t_token *token;
-
-	token = (t_token *)(*tokens)->content;
-	if (is_redirection(token))
-		redirection_add(tokens, token, command);
-	else
-		words_add(tokens, command);
-}
-
-/**
- * @brief Converts a list of arguments into an array.
- * 
- * @param args The list of arguments to convert.
- * @param argc The number of arguments in the list.
- * 
- * @return An array of arguments or `NULL` on error.
- * 
- * @note The `args` list is cleared after the conversion and set to NULL.
- */
-char **args_to_array(
-	t_list **args,
-	size_t argc
-)
-{
-	char	**argv;
-	t_list	*arg;
-	size_t	i;
-
-	argv = (char **)malloc(sizeof(char *) * (argc + 1));
-	if (argv == NULL)
-		return (NULL);
-	i = 0;
-	arg = *args;
-	while (arg != NULL)
-	{
-		argv[i] = (char *)arg->content;
-		arg = arg->next;
-		i++;
-	}
-	argv[i] = NULL;
-	ft_lstclear_nodes(args);
-	return (argv);
-}
-
-/**
- * @brief Adds all consecutive word tokens to a command's argv and updates its
- *        argc accordingly.
- * 
- * @param command The command to add the word tokens to.
- * @param tokens  The list of tokens to add to the command.
- */
-void words_add(
-	t_list **tokens,
-	t_command **command
-)
-{
-	t_list *args;
-	t_list *arg;
-	t_token *token;
-
-	args = NULL;
-	arg = *tokens;
-	token = (t_token *)arg->content;
-	while (arg != NULL && token->type == TOKEN_WORD)
-	{
-		ft_lstadd_back(&args, ft_lstnew(ft_strdup(token->value)));
-		(*command)->argc++;
-		arg = arg->next;
-		if (arg != NULL)
-			token = (t_token *)arg->content;
-	}
-	*tokens = arg;
-	(*command)->argv = args_to_array(&args, (*command)->argc);
-	ft_lstclear_nodes(&args);
-}
-
-void redirection_add(
-	t_list **tokens,
-	t_token *token,
-	t_command **command
-)
-{
-	t_redirection	*redirection;
-	t_list			*redirection_tokens;
-
-	redirection = redirection_new(tokens);
-	if (redirection == NULL)
-	{
-		command_clear(*command);
-		*command = NULL;
-		return ;
-	}
-	redirection_tokens = ft_lstnew(redirection);
-	if (redirection_tokens == NULL)
-	{
-		free(redirection);
-		return (malloc_error());
-	}
-	if (token->type == TOKEN_HEREDOC)
-		ft_lstadd_back(&(*command)->heredocs, redirection_tokens);
-	else
-		ft_lstadd_back(&(*command)->redirections, redirection_tokens);
-}
-
-/**
- * @brief Checks if a token is a redirection token.
- *
- * @param token The token to check.
- *
- * @return `true` if the token is a redirection token, `false` otherwise.
- */
-bool is_redirection(
-	t_token *token
-)
-{
-	return (token->type == TOKEN_REDIRECT_IN
-		|| token->type == TOKEN_REDIRECT_OUT
-		|| token->type == TOKEN_APPEND
-		|| token->type == TOKEN_HEREDOC);
-}
-
-void command_clear_argv(
-	t_command *command
-)
-{
-	int	i;
-
-	if (command->argv != NULL)
-	{
-		i = 0;
-		while (i < command->argc)
-		{
-			free(command->argv[i]);
-			i++;
-		}
-		free(command->argv);
-		command->argv = NULL;
-	}
-}
-
-/**
- * @brief Clears a command, freeing all associated memory.
- *
- * @param command The command to clear.
- */
-void command_clear(
-	t_command *command
-)
-{
-	if (command != NULL)
-	{
-		command_clear_argv(command);
-		ft_lstclear(&command->redirections, (void (*)(void *))redirection_clear);
-		ft_lstclear(&command->heredocs, (void (*)(void *))redirection_clear);
-		free(command);
-	}
-}
-
-/**
- * @brief Checks if a token is a pipe token.
- *
- * @param token The token to check.
- *
- * @return `true` if the token is a pipe token, `false` otherwise.
- */
-bool is_pipe(
-	t_token *token)
-{
-	return (token->type == TOKEN_PIPE);
-}
-
-/**
- * @brief Finds a node in a linked list that satisfies a given predicate.
- *
- * @param lst The linked list to search through.
- * @param pre   The predicate function to apply to each node's content.
- *
- * @returns The first node that satisfies the predicate or `NULL` if no such
- *          node exists or if the list is `NULL`.
- */
-t_list *ft_lstfind(
-	t_list *lst,
-	bool (*pre)(void *))
-{
-	while (lst != NULL)
-	{
-		if (pre(lst->content))
-			return (lst);
-		lst = lst->next;
-	}
-	return (NULL);
-}
-
-// void print_command_info(
-// 	t_command *command
-// )
-// {
-// 	printf("Command:\n");
-// 	printf("  argc: %d\n", command->argc);
-// 	printf("  argv: [");
-// 	for (int i = 0; i < command->argc; i++)
-// 	{
-// 		printf("%s", command->argv[i]);
-// 		if (i < command->argc - 1)
-// 			printf(", ");
-// 	}
-// 	printf("]\n");
-// 	printf("  path: %s\n", command->path);
-// 	printf("  redirections:\n");
-// 	t_list *redirection_node = command->redirections;
-// 	while (redirection_node != NULL)
-// 	{
-// 		t_redirection *redirection = (t_redirection *)redirection_node->content;
-// 		printf("    type: %d, target: %s\n", redirection->type, redirection->target);
-// 		redirection_node = redirection_node->next;
-// 	}
-// 	printf("  heredocs:\n");
-// 	t_list *heredoc_node = command->heredocs;
-// 	while (heredoc_node != NULL)
-// 	{
-// 		t_redirection *heredoc = (t_redirection *)heredoc_node->content;
-// 		printf("    type: %d, target: %s\n", heredoc->type, heredoc->target);
-// 		heredoc_node = heredoc_node->next;
-// 	}	
-// }
-
-// int main(int argc, char const *argv[], char **envp)
-// {
-// 	t_minishell	minishell;
-// 	t_list *commands;
-// 	char *line;
-
-// 	if (argc != 2)
-// 		return (EXIT_FAILURE);
-	
-// 	minishell_init(&minishell, envp);
-
-// 	line = ft_strdup(argv[1]);
-// 	commands = parse(line, NULL);
-// 	ft_lstiter(commands, (void (*)(void *))print_command_info);
-// 	if (line != NULL)
-// 		free(line);
-// 	if (commands != NULL)
-// 		ft_lstclear(&commands, (void (*)(void *))command_clear);
-// 	return 0;
-// }

src/parser/parser_clear.c

@@ -0,0 +1,46 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_clear.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 16:10:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 16:10:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+
+static void	command_clear_argv(
+	t_command *command
+)
+{
+	int	i;
+
+	if (command->argv != NULL)
+	{
+		i = 0;
+		while (i < command->argc)
+		{
+			free(command->argv[i]);
+			i++;
+		}
+		free(command->argv);
+		command->argv = NULL;
+	}
+}
+
+void	command_clear(
+	t_command *command
+)
+{
+	if (command != NULL)
+	{
+		command_clear_argv(command);
+		ft_lstclear(&command->redirections,
+			(void (*)(void *))redirection_clear);
+		ft_lstclear(&command->heredocs, (void (*)(void *))redirection_clear);
+		free(command);
+	}
+}

src/parser/parser_command.c

@@ -0,0 +1,128 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_command.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:26:42 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/13 21:26:42 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+
+static t_list	*ft_lstfind(t_list *lst, bool (*pre)(void *));
+
+/**
+ * @brief Creates a new command from a list of tokens.
+ *
+ * @param tokens The list of tokens to create the command from.
+ *
+ * @return A new command or NULL on error.
+ *
+ * @note The `tokens` pointer is moved to the next command's tokens.
+ */
+t_command	*command_new(
+	t_list **tokens
+)
+{
+	t_command	*command;
+	t_list		*current_token;
+	t_list		*delimiter_token;
+
+	command = (t_command *)ft_calloc(1, sizeof(t_command));
+	if (command == NULL)
+		return (NULL);
+	current_token = *tokens;
+	delimiter_token = ft_lstfind(current_token, (bool (*)(void *))is_pipe);
+	while (command != NULL && current_token != delimiter_token)
+		command_add_tokens(&command, &current_token);
+	*tokens = current_token;
+	return (command);
+}
+
+/**
+ * @brief Adds a token to a command, updating the command's arguments and
+ *        redirections as necessary.
+ *
+ * @param command The command to add the token to.
+ * @param tokens  The list of tokens to add to the command.
+ *
+ * @note The `command` pointer can be free'd if there is an error while adding
+ *       the token.
+ */
+void	command_add_tokens(
+	t_command **command,
+	t_list **tokens
+)
+{
+	t_token	*token;
+	int		io_number;
+
+	token = (t_token *)(*tokens)->content;
+	if (parser_token_is_fd_prefix(*tokens, &io_number))
+	{
+		*tokens = (*tokens)->next;
+		token = (t_token *)(*tokens)->content;
+		redirection_add_with_fd(tokens, token, command, io_number);
+		return ;
+	}
+	if (is_redirection(token))
+		redirection_add_with_fd(tokens, token, command, -1);
+	else
+		words_add(tokens, command);
+}
+
+/**
+ * @brief Checks if a token is a redirection token.
+ *
+ * @param token The token to check.
+ *
+ * @return `true` if the token is a redirection token, `false` otherwise.
+ */
+bool	is_redirection(
+	t_token *token
+)
+{
+	return (token->type == TOKEN_REDIRECT_IN
+		|| token->type == TOKEN_REDIRECT_OUT
+		|| token->type == TOKEN_APPEND
+		|| token->type == TOKEN_HEREDOC);
+}
+
+/**
+ * @brief Checks if a token is a pipe token.
+ *
+ * @param token The token to check.
+ *
+ * @return `true` if the token is a pipe token, `false` otherwise.
+ */
+bool	is_pipe(
+	t_token *token
+)
+{
+	return (token->type == TOKEN_PIPE);
+}
+
+/**
+ * @brief Finds a node in a linked list that satisfies a given predicate.
+ *
+ * @param lst The linked list to search through.
+ * @param pre   The predicate function to apply to each node's content.
+ *
+ * @returns The first node that satisfies the predicate or `NULL` if no such
+ *          node exists or if the list is `NULL`.
+ */
+static t_list	*ft_lstfind(
+	t_list *lst,
+	bool (*pre)(void *))
+{
+	while (lst != NULL)
+	{
+		if (pre(lst->content))
+			return (lst);
+		lst = lst->next;
+	}
+	return (NULL);
+}

src/parser/parser_command_fd.c

@@ -0,0 +1,54 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_command_fd.c                                :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 16:40:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 16:40:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+#include <limits.h>
+
+static bool	parse_io_number(const char *value, int *io_number)
+{
+	long	number;
+	size_t	i;
+
+	if (value == NULL || value[0] == '\0')
+		return (false);
+	number = 0;
+	i = 0;
+	while (value[i] != '\0')
+	{
+		if (!ft_isdigit(value[i]))
+			return (false);
+		if (number > (INT_MAX - (value[i] - '0')) / 10)
+			return (false);
+		number = (number * 10) + (value[i] - '0');
+		i++;
+	}
+	*io_number = (int)number;
+	return (true);
+}
+
+bool	parser_token_is_fd_prefix(
+	t_list *token_node,
+	int *io_number
+)
+{
+	t_token	*token;
+	t_token	*next_token;
+
+	if (token_node == NULL || token_node->next == NULL)
+		return (false);
+	token = (t_token *)token_node->content;
+	next_token = (t_token *)token_node->next->content;
+	if (token == NULL || next_token == NULL || token->type != TOKEN_WORD
+		|| !is_redirection(next_token))
+		return (false);
+	return (parse_io_number(token->value, io_number));
+}

src/parser/parser_expand.c

@@ -0,0 +1,138 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:24:45 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 06:56:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+static void	command_clear_argv_expand(
+	t_command *command
+)
+{
+	int	i;
+
+	i = 0;
+	while (i < command->argc)
+	{
+		free(command->argv[i]);
+		i++;
+	}
+	free(command->argv);
+}
+
+static bool	command_set_expanded_argv(
+	t_command *command,
+	t_list *expanded_args,
+	t_minishell *minishell
+)
+{
+	char	**argv;
+	t_list	*current;
+	int		argc;
+	int		i;
+
+	argc = ft_lstsize(expanded_args);
+	argv = (char **)malloc(sizeof(char *) * (argc + 1));
+	if (argv == NULL)
+		return (ft_lstclear(&expanded_args, free),
+			parser_expand_malloc_error(minishell), false);
+	i = 0;
+	current = expanded_args;
+	while (current != NULL)
+	{
+		argv[i++] = (char *)current->content;
+		current = current->next;
+	}
+	argv[i] = NULL;
+	ft_lstclear_nodes(&expanded_args);
+	command_clear_argv_expand(command);
+	command->argc = argc;
+	command->argv = argv;
+	return (true);
+}
+
+static bool	expand_argv(
+	t_command *command,
+	t_minishell *minishell
+)
+{
+	int		i;
+	t_list	*expanded_args;
+	t_list	*fields;
+	t_list	*last;
+
+	i = 0;
+	expanded_args = NULL;
+	while (i < command->argc)
+	{
+		fields = NULL;
+		if (!parser_expand_word_fields(command->argv[i], minishell,
+				true, &fields))
+			return (ft_lstclear(&expanded_args, free), false);
+		if (expanded_args == NULL)
+			expanded_args = fields;
+		else
+		{
+			last = ft_lstlast(expanded_args);
+			if (last != NULL)
+				last->next = fields;
+		}
+		i++;
+	}
+	return (command_set_expanded_argv(command, expanded_args, minishell));
+}
+
+static bool	expand_redirections(
+	t_list *redirections,
+	t_minishell *minishell
+)
+{
+	t_redirection	*redirection;
+	char			*expanded;
+
+	while (redirections != NULL)
+	{
+		redirection = (t_redirection *)redirections->content;
+		expanded = parser_expand_word(redirection->target, minishell,
+				true);
+		if (expanded == NULL)
+			return (false);
+		free(redirection->target);
+		redirection->target = expanded;
+		redirections = redirections->next;
+	}
+	return (true);
+}
+
+void	expand(
+	t_list **commands,
+	t_minishell *minishell
+)
+{
+	t_list		*current;
+	t_command	*command;
+
+	if (commands == NULL || *commands == NULL)
+		return ;
+	current = *commands;
+	while (current != NULL)
+	{
+		command = (t_command *)current->content;
+		if (!expand_argv(command, minishell)
+			|| !expand_redirections(command->redirections, minishell)
+			|| !expand_redirections(command->heredocs, minishell))
+		{
+			ft_lstclear(commands, (void (*)(void *))command_clear);
+			*commands = NULL;
+			return ;
+		}
+		current = current->next;
+	}
+}

src/parser/parser_expand_fields.c

@@ -0,0 +1,106 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_fields.c                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 13:15:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 13:15:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+static t_fields_ctx	init_fields_ctx(
+	t_list **fields,
+	char **current,
+	t_field_state *state
+)
+{
+	t_fields_ctx	ctx;
+
+	ctx.fields = fields;
+	ctx.current = current;
+	ctx.touched = &state->touched;
+	ctx.in_single_quote = &state->in_single_quote;
+	ctx.in_double_quote = &state->in_double_quote;
+	return (ctx);
+}
+
+static bool	finish_word_fields(
+	t_fields_ctx ctx
+)
+{
+	if (*ctx.in_single_quote || *ctx.in_double_quote)
+	{
+		ft_lstclear(ctx.fields, free);
+		free(*ctx.current);
+		syntax_error_unexpected_token(NULL);
+		ctx.minishell->exit_status = 2;
+		return (false);
+	}
+	if ((*ctx.touched || (*ctx.current)[0] != '\0')
+		&& !parser_fields_push_field(ctx))
+		return (false);
+	free(*ctx.current);
+	return (true);
+}
+
+static bool	process_word_fields(
+	const char *word,
+	t_fields_ctx ctx
+)
+{
+	size_t	i;
+
+	i = 0;
+	while (word[i] != '\0')
+	{
+		if (!parser_fields_step(word, &i, ctx))
+			return (false);
+	}
+	return (true);
+}
+
+static bool	set_empty_word_field(
+	t_list **fields,
+	t_minishell *minishell
+)
+{
+	t_list	*node;
+
+	node = ft_lstnew(ft_strdup(""));
+	if (node == NULL || node->content == NULL)
+		return (free(node), parser_expand_malloc_error(minishell), false);
+	*fields = node;
+	return (true);
+}
+
+bool	parser_expand_word_fields(
+	const char *word,
+	t_minishell *minishell,
+	bool expand_vars,
+	t_list **fields
+)
+{
+	char			*current;
+	t_field_state	state;
+	t_fields_ctx	ctx;
+
+	*fields = NULL;
+	if (word[0] == '\0')
+		return (set_empty_word_field(fields, minishell));
+	current = ft_strdup("");
+	if (current == NULL)
+		return (parser_expand_malloc_error(minishell), false);
+	state.touched = false;
+	state.in_single_quote = false;
+	state.in_double_quote = false;
+	ctx = init_fields_ctx(fields, &current, &state);
+	ctx.minishell = minishell;
+	ctx.expand_vars = expand_vars;
+	if (!process_word_fields(word, ctx))
+		return (ft_lstclear(fields, free), free(current), false);
+	return (finish_word_fields(ctx));
+}

src/parser/parser_expand_fields_escape.c

@@ -0,0 +1,85 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_fields_escape.c                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 16:40:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 16:40:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+static bool	is_backslash_escaped_in_double_quote(
+	char c
+)
+{
+	return (c == '$' || c == '\"' || c == '\\');
+}
+
+static char	get_escaped_char(
+	const char *word,
+	size_t *i
+)
+{
+	char	value;
+
+	if (word[*i + 1] == '\0')
+		value = word[(*i)++];
+	else
+	{
+		value = word[*i + 1];
+		*i += 2;
+	}
+	return (value);
+}
+
+bool	parser_fields_handle_backslash(
+	const char *word,
+	size_t *i,
+	t_fields_ctx ctx,
+	bool *handled
+)
+{
+	char	value[2];
+
+	*handled = false;
+	if (word[*i] != '\\' || *ctx.in_single_quote)
+		return (true);
+	if (*ctx.in_double_quote
+		&& !is_backslash_escaped_in_double_quote(word[*i + 1]))
+		return (true);
+	*handled = true;
+	value[0] = get_escaped_char(word, i);
+	value[1] = '\0';
+	if (!parser_fields_append_text(ctx.current, value, ctx.minishell))
+		return (false);
+	*ctx.touched = true;
+	return (true);
+}
+
+bool	parser_fields_expand_tilde(
+	const char *word,
+	size_t *i,
+	t_fields_ctx ctx,
+	bool *handled
+)
+{
+	char	*home;
+
+	*handled = false;
+	if (word[*i] != '~' || *ctx.in_single_quote || *ctx.in_double_quote
+		|| *i != 0 || (word[*i + 1] != '\0' && word[*i + 1] != '/'))
+		return (true);
+	home = get_var("HOME", ctx.minishell);
+	if (home == NULL)
+		return (true);
+	*handled = true;
+	(*i)++;
+	if (!parser_fields_append_text(ctx.current, home, ctx.minishell))
+		return (false);
+	*ctx.touched = true;
+	return (true);
+}

src/parser/parser_expand_fields_step.c

@@ -0,0 +1,113 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_fields_step.c                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 14:12:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 14:12:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+static bool	handle_quote_char(
+	const char *word,
+	size_t *i,
+	t_fields_ctx ctx
+)
+{
+	if (word[*i] == '\'' && !*ctx.in_double_quote)
+	{
+		*ctx.in_single_quote = !*ctx.in_single_quote;
+		*ctx.touched = true;
+		(*i)++;
+		return (true);
+	}
+	if (word[*i] == '\"' && !*ctx.in_single_quote)
+	{
+		*ctx.in_double_quote = !*ctx.in_double_quote;
+		*ctx.touched = true;
+		(*i)++;
+		return (true);
+	}
+	return (false);
+}
+
+static bool	skip_dollar_quote_prefix(
+	const char *word,
+	size_t *i,
+	t_fields_ctx ctx
+)
+{
+	if (word[*i] == '$' && !*ctx.in_single_quote && !*ctx.in_double_quote
+		&& word[*i + 1] != '\0'
+		&& (word[*i + 1] == '\'' || word[*i + 1] == '\"'))
+	{
+		(*i)++;
+		return (true);
+	}
+	return (false);
+}
+
+static bool	expand_dollar_token(
+	const char *word,
+	size_t *i,
+	t_fields_ctx ctx,
+	bool *handled
+)
+{
+	char	*expanded;
+
+	*handled = false;
+	if (word[*i] != '$' || *ctx.in_single_quote || !ctx.expand_vars)
+		return (true);
+	*handled = true;
+	expanded = parser_expand_variable(word, i, ctx.minishell);
+	if (expanded == NULL)
+		return (false);
+	if (!*ctx.in_double_quote
+		&& !parser_fields_expand_unquoted_value(ctx, expanded))
+		return (free(expanded), false);
+	if (*ctx.in_double_quote && !parser_fields_append_text(ctx.current,
+			expanded, ctx.minishell))
+		return (free(expanded), false);
+	if (*ctx.in_double_quote && expanded[0] != '\0')
+		*ctx.touched = true;
+	free(expanded);
+	return (true);
+}
+
+bool	parser_fields_step(
+	const char *word,
+	size_t *i,
+	t_fields_ctx ctx
+)
+{
+	char	value[2];
+	bool	handled;
+
+	if (handle_quote_char(word, i, ctx))
+		return (true);
+	if (!parser_fields_handle_backslash(word, i, ctx, &handled))
+		return (false);
+	if (handled)
+		return (true);
+	if (!parser_fields_expand_tilde(word, i, ctx, &handled))
+		return (false);
+	if (handled)
+		return (true);
+	if (skip_dollar_quote_prefix(word, i, ctx))
+		return (true);
+	if (!expand_dollar_token(word, i, ctx, &handled))
+		return (false);
+	if (handled)
+		return (true);
+	value[0] = word[(*i)++];
+	value[1] = '\0';
+	if (!parser_fields_append_text(ctx.current, value, ctx.minishell))
+		return (false);
+	*ctx.touched = true;
+	return (true);
+}

src/parser/parser_expand_fields_utils.c

@@ -0,0 +1,100 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_fields_utils.c                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 14:12:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 14:12:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+bool	parser_fields_append_text(
+	char **current,
+	const char *value,
+	t_minishell *minishell
+)
+{
+	char	*joined;
+
+	joined = ft_strnjoin(2, *current, (char *)value);
+	if (joined == NULL)
+	{
+		free(*current);
+		*current = NULL;
+		return (parser_expand_malloc_error(minishell), false);
+	}
+	free(*current);
+	*current = joined;
+	return (true);
+}
+
+static bool	is_ifs_char(
+	char c
+)
+{
+	return (c == ' ' || c == '\t' || c == '\n');
+}
+
+bool	parser_fields_push_field(
+	t_fields_ctx ctx
+)
+{
+	t_list	*node;
+
+	node = ft_lstnew(*ctx.current);
+	if (node == NULL)
+	{
+		free(*ctx.current);
+		*ctx.current = NULL;
+		return (parser_expand_malloc_error(ctx.minishell), false);
+	}
+	ft_lstadd_back(ctx.fields, node);
+	*ctx.current = ft_strdup("");
+	if (*ctx.current == NULL)
+		return (ft_lstclear(ctx.fields, free),
+			parser_expand_malloc_error(ctx.minishell), false);
+	*ctx.touched = false;
+	return (true);
+}
+
+static void	skip_ifs(
+	const char *expanded,
+	size_t *i
+)
+{
+	while (expanded[*i] != '\0' && is_ifs_char(expanded[*i]))
+		(*i)++;
+}
+
+bool	parser_fields_expand_unquoted_value(
+	t_fields_ctx ctx,
+	const char *expanded
+)
+{
+	size_t	i;
+	char	value[2];
+
+	i = 0;
+	while (expanded[i] != '\0')
+	{
+		if (is_ifs_char(expanded[i]))
+		{
+			if ((*ctx.touched || (*ctx.current)[0] != '\0')
+				&& !parser_fields_push_field(ctx))
+				return (false);
+			skip_ifs(expanded, &i);
+			continue ;
+		}
+		value[0] = expanded[i];
+		value[1] = '\0';
+		if (!parser_fields_append_text(ctx.current, value, ctx.minishell))
+			return (false);
+		*ctx.touched = true;
+		i++;
+	}
+	return (true);
+}

src/parser/parser_expand_internal.h

@@ -0,0 +1,67 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_internal.h                           :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 06:56:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 06:56:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef PARSER_EXPAND_INTERNAL_H
+# define PARSER_EXPAND_INTERNAL_H
+
+# include "parser.h"
+# include "errors.h"
+# include "variables.h"
+
+typedef struct s_fields_ctx	t_fields_ctx;
+
+void	parser_expand_malloc_error(t_minishell *minishell);
+char	*parser_expand_variable(const char *word, size_t *i,
+			t_minishell *minishell);
+char	*parser_expand_word(const char *word, t_minishell *minishell,
+			bool expand_vars);
+bool	parser_expand_word_fields(const char *word, t_minishell *minishell,
+			bool expand_vars, t_list **fields);
+bool	parser_fields_append_text(char **current, const char *value,
+			t_minishell *minishell);
+bool	parser_fields_push_field(t_fields_ctx ctx);
+bool	parser_fields_expand_unquoted_value(t_fields_ctx ctx,
+			const char *expanded);
+bool	parser_fields_step(const char *word, size_t *i, t_fields_ctx ctx);
+bool	parser_fields_handle_backslash(const char *word, size_t *i,
+			t_fields_ctx ctx, bool *handled);
+bool	parser_fields_expand_tilde(const char *word, size_t *i,
+			t_fields_ctx ctx, bool *handled);
+
+typedef struct s_word_ctx
+{
+	char		**result;
+	bool		*in_single_quote;
+	bool		*in_double_quote;
+	t_minishell	*minishell;
+	bool		expand_vars;
+}	t_word_ctx;
+
+typedef struct s_fields_ctx
+{
+	t_list		**fields;
+	char		**current;
+	bool		*touched;
+	bool		*in_single_quote;
+	bool		*in_double_quote;
+	t_minishell	*minishell;
+	bool		expand_vars;
+}	t_fields_ctx;
+
+typedef struct s_field_state
+{
+	bool	touched;
+	bool	in_single_quote;
+	bool	in_double_quote;
+}	t_field_state;
+
+#endif

src/parser/parser_expand_variable.c

@@ -0,0 +1,82 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_variable.c                           :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 06:56:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 06:56:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+void	parser_expand_malloc_error(
+	t_minishell *minishell
+)
+{
+	minishell->exit = true;
+	malloc_error();
+}
+
+static bool	is_var_char(
+	char c
+)
+{
+	return (ft_isalnum(c) || c == '_');
+}
+
+static char	*dup_or_error(
+	const char *value,
+	t_minishell *minishell
+)
+{
+	char	*dup;
+
+	dup = ft_strdup(value);
+	if (dup == NULL)
+		return (parser_expand_malloc_error(minishell), NULL);
+	return (dup);
+}
+
+static char	*expand_named_variable(
+	const char *word,
+	size_t *i,
+	t_minishell *minishell
+)
+{
+	char	*name;
+	char	*value;
+	size_t	start;
+
+	start = *i;
+	while (word[*i] != '\0' && is_var_char(word[*i]))
+		(*i)++;
+	name = ft_substr(word, start, *i - start);
+	if (name == NULL)
+		return (parser_expand_malloc_error(minishell), NULL);
+	value = get_var(name, minishell);
+	free(name);
+	if (value == NULL)
+		value = "";
+	return (dup_or_error(value, minishell));
+}
+
+char	*parser_expand_variable(const char *word, size_t *i,
+		t_minishell *minishell)
+{
+	char	*expanded;
+
+	(*i)++;
+	if (word[*i] == '?')
+	{
+		expanded = ft_itoa(minishell->exit_status);
+		if (expanded == NULL)
+			return (parser_expand_malloc_error(minishell), NULL);
+		return ((*i)++, expanded);
+	}
+	if (word[*i] == '\0' || !is_var_char(word[*i]))
+		return (dup_or_error("$", minishell));
+	return (expand_named_variable(word, i, minishell));
+}

src/parser/parser_expand_word.c

@@ -0,0 +1,104 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_expand_word.c                               :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 06:56:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 06:56:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser_expand_internal.h"
+
+static bool	word_toggle_quotes(
+	char c,
+	bool *in_single_quote,
+	bool *in_double_quote
+)
+{
+	if (c == '\'' && !*in_double_quote)
+		return (*in_single_quote = !*in_single_quote, true);
+	if (c == '\"' && !*in_single_quote)
+		return (*in_double_quote = !*in_double_quote, true);
+	return (false);
+}
+
+static bool	word_append(
+	char **result,
+	const char *value,
+	t_minishell *minishell
+)
+{
+	char	*joined;
+
+	joined = ft_strnjoin(2, *result, (char *)value);
+	if (joined == NULL)
+	{
+		free(*result);
+		*result = NULL;
+		return (parser_expand_malloc_error(minishell), false);
+	}
+	free(*result);
+	*result = joined;
+	return (true);
+}
+
+static bool	word_step(
+	const char *word,
+	size_t *i,
+	t_word_ctx ctx
+)
+{
+	char	*expanded;
+	char	value[2];
+
+	if (word_toggle_quotes(word[*i], ctx.in_single_quote, ctx.in_double_quote))
+		return ((*i)++, true);
+	if (word[*i] == '$' && word[*i + 1] != '\0'
+		&& !*ctx.in_single_quote && !*ctx.in_double_quote
+		&& (word[*i + 1] == '\'' || word[*i + 1] == '\"'))
+		return ((*i)++, true);
+	if (word[*i] == '$' && !*ctx.in_single_quote && ctx.expand_vars)
+	{
+		expanded = parser_expand_variable(word, i, ctx.minishell);
+		if (expanded == NULL || !word_append(ctx.result, expanded,
+				ctx.minishell))
+			return (free(expanded), false);
+		return (free(expanded), true);
+	}
+	value[0] = word[*i];
+	value[1] = '\0';
+	(*i)++;
+	return (word_append(ctx.result, value, ctx.minishell));
+}
+
+char	*parser_expand_word(
+	const char *word,
+	t_minishell *minishell,
+	bool expand_vars
+)
+{
+	char	*result;
+	size_t	i;
+	bool	in_single_quote;
+	bool	in_double_quote;
+
+	result = ft_strdup("");
+	if (result == NULL)
+		return (parser_expand_malloc_error(minishell), NULL);
+	i = 0;
+	in_single_quote = false;
+	in_double_quote = false;
+	while (word[i] != '\0')
+	{
+		if (!word_step(word, &i, (t_word_ctx){&result, &in_single_quote,
+				&in_double_quote, minishell, expand_vars}))
+			return (NULL);
+	}
+	if (in_single_quote || in_double_quote)
+		return (free(result), syntax_error_unexpected_token(NULL),
+			minishell->exit_status = 2, NULL);
+	return (result);
+}

src/parser/parser_redirection.c

@@ -0,0 +1,134 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_redirection.c                               :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:28:35 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/13 21:28:35 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+#include "errors.h"
+
+static t_redirection	*redirection_new(t_list **tokens, int io_number);
+static bool				redirection_read_target(t_redirection *rd, t_list **tk);
+static bool				has_single_quote(const char *value);
+
+/**
+ * @brief Creates a new redirection from a list of tokens.
+ *
+ * @param tokens The list of tokens to create the redirection from.
+ *
+ * @return A new redirection or `NULL` on error.
+ */
+static t_redirection	*redirection_new(
+	t_list **tokens,
+	int io_number
+)
+{
+	t_redirection	*redirection;
+	t_token			*token;
+
+	redirection = (t_redirection *)malloc(sizeof(t_redirection));
+	if (redirection == NULL)
+		return (malloc_error(), NULL);
+	token = (t_token *)(*tokens)->content;
+	redirection->type = token->type;
+	redirection->heredoc_expand = true;
+	redirection->heredoc_ready = false;
+	if (io_number < 0)
+		redirection->io_number = STDOUT_FILENO;
+	else
+		redirection->io_number = io_number;
+	if (io_number < 0 && (token->type == TOKEN_REDIRECT_IN
+			|| token->type == TOKEN_HEREDOC))
+		redirection->io_number = STDIN_FILENO;
+	if (!redirection_read_target(redirection, tokens))
+		return (free(redirection), NULL);
+	return (redirection);
+}
+
+static bool	redirection_read_target(
+	t_redirection *rd,
+	t_list **tk
+)
+{
+	t_token	*token;
+
+	*tk = (*tk)->next;
+	if (*tk == NULL)
+		return (syntax_error_unexpected_token(NULL), false);
+	token = (t_token *)(*tk)->content;
+	if (token->type != TOKEN_WORD)
+	{
+		while (*tk != NULL)
+			*tk = (*tk)->next;
+		return (syntax_error_unexpected_token(token), false);
+	}
+	if (rd->type == TOKEN_HEREDOC && has_single_quote(token->value))
+		rd->heredoc_expand = false;
+	rd->target = ft_strdup(token->value);
+	if (rd->target == NULL)
+		return (malloc_error(), false);
+	*tk = (*tk)->next;
+	return (true);
+}
+
+static bool	has_single_quote(
+	const char *value
+)
+{
+	size_t	i;
+
+	if (value == NULL)
+		return (false);
+	i = 0;
+	while (value[i] != '\0')
+	{
+		if (value[i] == '\'')
+			return (true);
+		i++;
+	}
+	return (false);
+}
+
+void	redirection_clear(
+	t_redirection *redirection
+)
+{
+	if (redirection != NULL)
+	{
+		free(redirection->target);
+		free(redirection);
+	}
+}
+
+void	redirection_add_with_fd(
+	t_list **tokens,
+	t_token *token,
+	t_command **command,
+	int io_number
+)
+{
+	t_redirection	*redirection;
+	t_list			*redirection_tokens;
+
+	redirection = redirection_new(tokens, io_number);
+	if (redirection == NULL)
+	{
+		command_clear(*command);
+		*command = NULL;
+		return ;
+	}
+	redirection_tokens = ft_lstnew(redirection);
+	if (redirection_tokens == NULL)
+	{
+		free(redirection);
+		return (malloc_error());
+	}
+	(void)token;
+	ft_lstadd_back(&(*command)->redirections, redirection_tokens);
+}

src/parser/parser_words.c

@@ -0,0 +1,112 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parser_words.c                                     :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:29:44 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 03:34:38 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "parser.h"
+
+static bool	args_add_word(
+	t_list **args,
+	const char *value
+)
+{
+	t_list	*node;
+	char	*dup;
+
+	dup = ft_strdup(value);
+	if (dup == NULL)
+		return (false);
+	node = ft_lstnew(dup);
+	if (node == NULL)
+		return (free(dup), false);
+	ft_lstadd_back(args, node);
+	return (true);
+}
+
+static bool	words_collect(
+	t_list *arg,
+	t_list **args,
+	int *new_argc,
+	t_list **end
+)
+{
+	t_token	*token;
+	int		io_number;
+
+	while (arg != NULL)
+	{
+		token = (t_token *)arg->content;
+		if (token->type != TOKEN_WORD || parser_token_is_fd_prefix(arg,
+				&io_number))
+			break ;
+		if (!args_add_word(args, token->value))
+			return (false);
+		(*new_argc)++;
+		arg = arg->next;
+	}
+	*end = arg;
+	return (true);
+}
+
+static bool	command_append_words(
+	t_command *command,
+	t_list **args,
+	int new_argc
+)
+{
+	char	**argv;
+	t_list	*current;
+	int		i;
+
+	argv = (char **)malloc(sizeof(char *) * (command->argc + new_argc + 1));
+	if (argv == NULL)
+		return (false);
+	i = 0;
+	while (i < command->argc)
+	{
+		argv[i] = command->argv[i];
+		i++;
+	}
+	current = *args;
+	while (current != NULL)
+	{
+		argv[i++] = (char *)current->content;
+		current = current->next;
+	}
+	argv[i] = NULL;
+	free(command->argv);
+	ft_lstclear_nodes(args);
+	command->argv = argv;
+	command->argc += new_argc;
+	return (true);
+}
+
+/**
+ * @brief Adds all consecutive word tokens to a command's argv and updates its
+ *        argc accordingly.
+ *
+ * @param command The command to add the word tokens to.
+ * @param tokens  The list of tokens to add to the command.
+ */
+void	words_add(
+	t_list **tokens,
+	t_command **command
+)
+{
+	t_list	*args;
+	int		new_argc;
+
+	args = NULL;
+	new_argc = 0;
+	if (!words_collect(*tokens, &args, &new_argc, tokens)
+		|| !command_append_words(*command, &args, new_argc))
+		return (ft_lstclear(&args, free), command_clear(*command),
+			*command = NULL, (void)0);
+}

src/variables/environment.c

@@ -1,179 +0,0 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   environment.c                                      :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2025/12/01 09:12:39 by sede-san          #+#    #+#             */
-/*   Updated: 2026/02/08 19:44:15 by sede-san         ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
-
-#include "minishell.h"
-#include "core.h"
-
-/**
- * @brief Parses and stores environment variables from envp array into a hashmap
- *
- * This function iterates through the environment variables array (envp) and
- * splits each variable string on the '=' delimiter to separate the variable
- * name from its value. Each name-value pair is then stored in the minishell's
- * environment hashmap for later retrieval.
- *
- * @param envp Array of environment variable strings in "NAME=value" format
- * @param msh  Pointer to the minishell structure containing the environment
- *             hashmap
- *
- * @note The function assumes envp strings are in the standard format
- *       "NAME=value"
- */
-void	set_envp(
-	char **envp,
-	t_minishell *msh
-) {
-	char	**splitted_env;
-
-	msh->variables.environment
-		= ft_hashmap_new(32, ft_hashmap_hashstr, ft_hashmap_strcmp);
-	if (msh == NULL)
-	{
-		ft_hashmap_clear(&msh->variables.environment, free);
-		return ;
-	}
-	while (*envp != NULL)
-	{
-		splitted_env = ft_split(*envp, '=');
-		if (splitted_env == NULL)
-		{
-			ft_hashmap_clear(&msh->variables.environment, free);
-			return ;
-		}
-		ft_hashmap_put(msh->variables.environment,
-			ft_strdup(splitted_env[0]), ft_strdup(splitted_env[1]));
-		ft_free_split(splitted_env);
-		envp++;
-	}
-}
-
-/**
- * @brief Sets an environment variable in the minishell's environment hashmap.
- *
- * This function adds a new environment variable or updates an existing one
- * in the minishell's environment hashmap. If the variable already exists,
- * the old value is freed to prevent memory leaks. If the variable is new,
- * a duplicate of the key name is created for storage.
- *
- * @param env_name  The name of the environment variable to set
- * @param env_value The value to assign to the environment variable
- * @param msh       Pointer to the minishell structure containing the
- *                  environment hashmap
- */
-void	set_env(
-	const char *env_name,
-	char *env_value,
-	t_minishell *msh
-) {
-	t_hashmap	*environment;
-	const char	*key;
-	char		*old_value;
-
-	environment = msh->variables.environment;
-	key = env_name;
-	if (!ft_hashmap_contains_key(environment, key))
-		key = ft_strdup(env_name);
-	old_value = ft_hashmap_put(environment, key, ft_strdup(env_value));
-	if (old_value != NULL)
-		free(old_value);
-}
-
-/**
- * @brief Converts the environment variables hashmap to an envp array format.
- *
- * This function extracts all environment variables from the minishell's
- * environment hashmap and converts them into a NULL-terminated array of
- * strings in the format "KEY=VALUE".
- *
- * @param msh Pointer to the minishell structure containing the environment
- *            variables hashmap.
- *
- * @return A dynamically allocated array of strings representing environment
- *         variables in "KEY=VALUE" format, terminated by NULL. Returns NULL
- *         if memory allocation fails. The caller is responsible for freeing
- *         the returned array and its individual string elements using
- *         the `free_envp()` function.
- *
- * @note The function allocates memory for both the array and individual
- *       strings using malloc and ft_strnjoin respectively.
- * @note The returned array size is environment->size + 1 to accommodate
- *       the NULL terminator.
- */
-char	**get_envp(
-	t_minishell *msh
-) {
-	char		**envp;
-	t_list		*env_list;
-	t_list		*env;
-	t_map_entry	*entry;
-	size_t		i;
-
-	env_list = ft_hashmap_entries(msh->variables.environment);
-	envp = (char **)malloc((msh->variables.environment->size + 1) * sizeof(char *));
-	if (envp != NULL)
-	{
-		i = 0;
-		env = env_list;
-		while (env != NULL)
-		{
-			entry = env->content;
-			envp[i++] = ft_strnjoin(3, entry->key, "=", entry->value);
-			env = env->next;
-		}
-		envp[i] = NULL;
-	}
-	ft_lstclear_nodes(&env_list);
-	return (envp);
-}
-
-/**
- * @brief Frees a dynamically allocated environment variables array
- *
- * This function deallocates memory for an array of strings that was previously
- * allocated by `get_envp()`. It iterates through each string in the array,
- * frees the memory for individual strings, and then frees the array itself.
- *
- * @param envp Pointer to the array of environment variable strings to be freed.
- *             Each string in the array should be dynamically allocated.
- *             The array must be NULL-terminated.
- */
-void	free_envp(
-	char **envp
-) {
-	size_t	i;
-
-	i = -1;
-	while (envp[++i] != NULL)
-		free(envp[i]);
-	free(envp);
-}
-
-/**
- * @brief Retrieves the value of an environment variable from the shell's
- *        environment hashmap.
- *
- * This function searches for the specified environment variable name in the
- * minishell's environment variable hashmap and returns its associated value.
- *
- * @param env_name The name of the environment variable to retrieve (e.g.,
- *                 "PATH", "HOME")
- * @param msh      Pointer to the minishell structure containing the environment
- *                 variables hashmap
- *
- * @return The value of the environment variable if found, NULL if not found
- */
-char	*get_env(
-	const char *env_name,
-	t_minishell *msh
-) {
-	return (ft_hashmap_get(msh->variables.environment, env_name));
-}

src/variables/environment/environment.c

@@ -0,0 +1,149 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   environment.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/12/01 09:12:39 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 13:30:34 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+#include "core.h"
+#include "variables.h"
+#include "errors.h"
+
+static char	*resolve_key(
+				const char *name,
+				t_hashmap *environment,
+				t_minishell *minishell,
+				bool *owns_key
+				);
+static char	*resolve_value(
+				char *value,
+				t_minishell *minishell
+				);
+
+/**
+ * @brief Retrieves the value of an environment variable from the shell's
+ *        environment hashmap.
+ *
+ * This function searches for the specified environment variable name in the
+ * minishell's environment variable hashmap and returns its associated value.
+ *
+ * @param name      The name of the environment variable to retrieve.
+ * @param minishell Pointer to the minishell object.
+ *
+ * @return The value of the environment variable if found, NULL if not found
+ */
+char	*get_env(
+	const char *name,
+	t_minishell *minishell
+)
+{
+	return (ft_hashmap_get(minishell->variables.environment, name));
+}
+
+/**
+ * @brief Sets an environment variable in the minishell's environment hashmap.
+ *
+ * This function adds a new environment variable or updates an existing one
+ * in the minishell's environment hashmap. If the variable already exists,
+ * the old value is freed to prevent memory leaks. If the variable is new,
+ * a duplicate of the key name is created for storage.
+ *
+ * @param name      The name of the environment variable to set
+ * @param value     The value to assign to the environment variable
+ * @param minishell Pointer to the minishell object.
+ */
+void	set_env(
+	const char *name,
+	char *value,
+	t_minishell *minishell
+)
+{
+	t_hashmap	*environment;
+	char		*key;
+	char		*val;
+	char		*old_value;
+	bool		owns_key;
+
+	environment = minishell->variables.environment;
+	key = resolve_key(name, environment, minishell, &owns_key);
+	if (key == NULL)
+		return ;
+	val = resolve_value(value, minishell);
+	if (val == NULL)
+	{
+		if (owns_key)
+			free(key);
+		return ;
+	}
+	old_value = ft_hashmap_put(environment, key, val);
+	if (old_value != NULL)
+		free(old_value);
+}
+
+/**
+ * @brief Removes an environment variable by name.
+ * 
+ * @param name      The name of the environment variable to remove.
+ * @param minishell Pointer to the minishell structure.
+ * 
+ * @note If the environment variable exists, it will be removed from the hashmap
+ *       and its associated value will be freed.
+ */
+void	unset_env(
+	const char *name,
+	t_minishell *minishell
+)
+{
+	t_hashmap	*environment;
+	char		*val;
+
+	environment = minishell->variables.environment;
+	val = ft_hashmap_remove(environment, (void *)name);
+	if (val != NULL)
+		free(val);
+}
+
+static char	*resolve_key(
+	const char *name,
+	t_hashmap *environment,
+	t_minishell *minishell,
+	bool *owns_key
+)
+{
+	char	*key;
+
+	key = (char *)name;
+	*owns_key = false;
+	if (name == NULL)
+		return (NULL);
+	if (!ft_hashmap_contains_key(environment, name))
+	{
+		key = ft_strdup(name);
+		if (key == NULL)
+			return (minishell->exit = true, malloc_error(), NULL);
+		*owns_key = true;
+	}
+	return (key);
+}
+
+static char	*resolve_value(
+	char *value,
+	t_minishell *minishell
+)
+{
+	char	*val;
+
+	if (value == NULL)
+		val = ft_strdup("");
+	else
+		val = ft_strdup(value);
+	if (val == NULL)
+		return (minishell->exit = true, malloc_error(), NULL);
+	return (val);
+}

src/variables/environment/environment_envp.c

@@ -0,0 +1,121 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   environment_envp.c                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/14 16:10:00 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 16:10:00 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+#include "core.h"
+#include "variables.h"
+#include "errors.h"
+
+static void	fill_envp(
+	char **envp,
+	t_list *env_list
+)
+{
+	t_list		*env;
+	t_map_entry	*entry;
+	size_t		i;
+
+	i = 0;
+	env = env_list;
+	while (env != NULL)
+	{
+		entry = env->content;
+		envp[i++] = ft_strnjoin(3, entry->key, "=", entry->value);
+		env = env->next;
+	}
+	envp[i] = NULL;
+}
+
+char	**get_envp(
+	t_minishell *minishell
+)
+{
+	char	**envp;
+	t_list	*env_list;
+
+	env_list = ft_hashmap_entries(minishell->variables.environment);
+	envp = (char **)malloc(
+			(minishell->variables.environment->size + 1) * sizeof(char *)
+			);
+	if (envp != NULL)
+		fill_envp(envp, env_list);
+	ft_lstclear_nodes(&env_list);
+	return (envp);
+}
+
+static bool	import_env_entry(
+	char *entry_text,
+	t_minishell *minishell
+)
+{
+	char	*equal;
+	char	*key;
+	char	*value;
+	size_t	key_len;
+
+	equal = ft_strchr(entry_text, '=');
+	if (equal == NULL)
+		return (true);
+	key_len = (size_t)(equal - entry_text);
+	key = ft_substr(entry_text, 0, key_len);
+	value = ft_strdup(equal + 1);
+	if (key == NULL || value == NULL)
+		return (free(key), free(value), minishell->exit = true,
+			malloc_error(), false);
+	set_env(key, value, minishell);
+	free(key);
+	free(value);
+	return (!minishell->exit);
+}
+
+static void	update_shlvl(
+	t_minishell *minishell
+)
+{
+	char	*value;
+	char	*new_shlvl;
+	int		shlvl;
+
+	value = get_env("SHLVL", minishell);
+	shlvl = 0;
+	if (value != NULL)
+		shlvl = ft_atoi(value);
+	if (shlvl < 0)
+		shlvl = 0;
+	new_shlvl = ft_itoa(shlvl + 1);
+	if (new_shlvl == NULL)
+		return ((void)(minishell->exit = true), malloc_error());
+	set_env("SHLVL", new_shlvl, minishell);
+	free(new_shlvl);
+}
+
+void	set_envp(
+	char **envp,
+	t_minishell *minishell
+)
+{
+	t_hashmap	*environment;
+
+	if (minishell == NULL || envp == NULL)
+		return ;
+	environment = ft_hashmap_new(32, ft_hashmap_hashstr, ft_hashmap_strcmp);
+	if (environment == NULL)
+		return ;
+	minishell->variables.environment = environment;
+	while (*envp != NULL)
+	{
+		if (!import_env_entry(*envp, minishell))
+			return ;
+		envp++;
+	}
+	update_shlvl(minishell);
+}

src/variables/internal/internal.c

@@ -0,0 +1,123 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   internal.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:29:43 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 15:17:17 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+#include "core.h"
+#include "errors.h"
+
+/**
+ * @brief Retrieves the value of an internal variable by name.
+ * 
+ * @param name      The name of the internal variable to retrieve.
+ * @param minishell Pointer to the minishell structure.
+ * 
+ * @return The value of the internal variable if found, or NULL if not found.
+ */
+char	*get_int(
+	const char *name,
+	t_minishell *minishell
+)
+{
+	return (ft_hashmap_get(minishell->variables.internal, name));
+}
+
+/**
+ * @brief Stores a variable as internal.
+ * 
+ * @param name      The name of the internal variable to set.
+ * @param value     The value to associate with the internal variable.
+ * @param minishell Pointer to the minishell structure.
+ * 
+ * @note If the internal variable already exists, its value will be updated and
+ *       the old value will be freed. If it does not exist, a new internal
+ *       variable will be created.
+ */
+void	set_int(
+	const char *name,
+	char *value,
+	t_minishell *minishell
+)
+{
+	t_hashmap		*internal;
+	char			*key;
+	char			*val;
+	char			*old_val;
+
+	internal = minishell->variables.internal;
+	key = (char *)name;
+	if (key != NULL && !ft_hashmap_contains_key(internal, key))
+	{
+		key = ft_strdup(name);
+		if (key == NULL)
+			return (minishell->exit = true, malloc_error());
+	}
+	val = value;
+	if (val != NULL)
+		val = ft_strdup(value);
+	if (val == NULL)
+	{
+		if (key != name)
+			free(key);
+		return (minishell->exit = true, malloc_error());
+	}
+	old_val = ft_hashmap_put(internal, key, val);
+	if (old_val != NULL)
+		free(old_val);
+}
+
+/**
+ * @brief Removes an internal variable by name.
+ * 
+ * @param name      The name of the internal variable to remove.
+ * @param minishell Pointer to the minishell structure.
+ * 
+ * @note If the internal variable exists, it will be removed from the hashmap
+ *       and its associated value will be freed.
+ */
+void	unset_int(
+	const char *name,
+	t_minishell *minishell
+)
+{
+	char	*value;
+
+	value = ft_hashmap_remove(minishell->variables.internal, (void *)name);
+	if (value != NULL)
+		free(value);
+}
+
+/**
+ * @brief Initializes the internal variables hashmap with default values.
+ * 
+ * @param minishell Pointer to the minishell structure to initialize.
+ *
+ * @warning This function must be called only once during the initialization of
+ *          the minishell. 
+ */
+void	set_intp(
+	t_minishell *minishell
+)
+{
+	if (minishell == NULL)
+		return ;
+	minishell->variables.internal
+		= ft_hashmap_new(16, ft_hashmap_hashstr, ft_hashmap_strcmp);
+	if (minishell->variables.internal == NULL)
+		return ;
+	set_int("?", "0", minishell);
+	set_int("_", "minishell", minishell);
+	set_int("PS0", "", minishell);
+	set_int("PS1", DEFAULT_PS1, minishell);
+	set_int("PS2", DEFAULT_PS2, minishell);
+	set_int("MINISHELL", "minishell", minishell);
+	set_int("MINISHELL_VERSION", MINISHELL_VERSION, minishell);
+}

src/variables/variables.c

@@ -0,0 +1,50 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   variables.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/02/13 21:41:44 by sede-san          #+#    #+#             */
+/*   Updated: 2026/02/14 00:52:12 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "variables.h"
+
+/**
+ * @brief Retrieves the value of a variable by name.
+ * 
+ * @param name      The name of the variable to retrieve.
+ * @param minishell Pointer to the minishell structure.
+ * 
+ * @return The value of the variable if found, or NULL if not found.
+ */
+char	*get_var(
+	const char *name,
+	t_minishell *minishell
+)
+{
+	char	*value;
+
+	value = get_int(name, minishell);
+	if (value == NULL)
+		value = get_env(name, minishell);
+	return (value);
+}
+
+void	set_var(const char *name, char *value, t_minishell *minishell)
+{
+	if (ft_hashmap_contains_key(minishell->variables.internal, name))
+		set_int(name, value, minishell);
+	set_env(name, value, minishell);
+}
+
+void	unset_var(
+	const char *name,
+	t_minishell *minishell
+)
+{
+	unset_int(name, minishell);
+	unset_env(name, minishell);
+}

tests/builtins_edge_cases.sh

@@ -0,0 +1,204 @@
+#!/usr/bin/env bash
+
+set -u
+
+ROOT_DIR="$(cd -- "$(dirname -- "$0")/.." && pwd)"
+MSH_BIN="$ROOT_DIR/minishell"
+TMP_DIR="$(mktemp -d /tmp/minishell-builtins-tests.XXXXXX)"
+
+PASS_COUNT=0
+FAIL_COUNT=0
+CASE_OUT=""
+CASE_ERR=""
+CASE_EC=0
+CASE_NAME=""
+CASE_FAILED=0
+
+cleanup() {
+	rm -rf "$TMP_DIR"
+}
+
+pass() {
+	printf "PASS: %s\n" "$1"
+	PASS_COUNT=$((PASS_COUNT + 1))
+}
+
+fail() {
+	printf "FAIL: %s\n" "$1"
+	FAIL_COUNT=$((FAIL_COUNT + 1))
+	CASE_FAILED=1
+}
+
+assert_exit_code() {
+	local expected="$1"
+	if [ "$CASE_EC" -ne "$expected" ]; then
+		fail "$CASE_NAME -> exit code esperado $expected, obtenido $CASE_EC"
+	fi
+}
+
+assert_err_contains() {
+	local text="$1"
+	if ! grep -Fq -- "$text" "$CASE_ERR"; then
+		fail "$CASE_NAME -> stderr no contiene: $text"
+	fi
+}
+
+assert_out_contains() {
+	local text="$1"
+	if ! grep -Fq -- "$text" "$CASE_OUT"; then
+		fail "$CASE_NAME -> stdout no contiene: $text"
+	fi
+}
+
+assert_out_regex_count() {
+	local regex="$1"
+	local expected="$2"
+	local count
+
+	count="$(grep -Ec -- "$regex" "$CASE_OUT" || true)"
+	if [ "$count" -ne "$expected" ]; then
+		fail "$CASE_NAME -> regex [$regex] esperado $expected, obtenido $count"
+	fi
+}
+
+run_case() {
+	local name="$1"
+	local input="$2"
+	local expected_exit="$3"
+	local clean_env="${4:-0}"
+
+	CASE_NAME="$name"
+	CASE_OUT="$TMP_DIR/$name.out"
+	CASE_ERR="$TMP_DIR/$name.err"
+	CASE_EC=0
+	CASE_FAILED=0
+
+	if [ "$clean_env" -eq 1 ]; then
+		printf "%b" "$input" | env -i PATH="$PATH" "$MSH_BIN" >"$CASE_OUT" 2>"$CASE_ERR"
+	else
+		printf "%b" "$input" | "$MSH_BIN" >"$CASE_OUT" 2>"$CASE_ERR"
+	fi
+	CASE_EC=$?
+	assert_exit_code "$expected_exit"
+	if [ "$CASE_FAILED" -eq 0 ]; then
+		pass "$CASE_NAME"
+	fi
+}
+
+run_pwd_deleted_dir_case() {
+	local tmpd
+
+	tmpd="$TMP_DIR/pwd_deleted_dir"
+	mkdir -p "$tmpd"
+	run_case "pwd_deleted_dir" \
+		"cd $tmpd\n/bin/rmdir $tmpd\npwd\nexit\n" \
+		1
+	assert_err_contains "minishell: pwd:"
+	if [ "$CASE_FAILED" -eq 0 ]; then
+		pass "$CASE_NAME assertions"
+	fi
+}
+
+trap cleanup EXIT
+
+if [ ! -x "$MSH_BIN" ]; then
+	printf "Compilando minishell...\n"
+	if ! make -C "$ROOT_DIR" >/dev/null; then
+		printf "No se pudo compilar minishell\n"
+		exit 1
+	fi
+fi
+
+run_case "exit_non_numeric" "exit abc\n" 2
+assert_err_contains "numeric argument required"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "exit_sign_only" "exit +\n" 2
+assert_err_contains "numeric argument required"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "exit_negative_wrap" "exit -1\n" 255
+
+run_case "exit_too_many_args" "exit 7 8\npwd\nexit\n" 0
+assert_err_contains "too many arguments"
+assert_out_contains "$ROOT_DIR"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "cd_home_not_set" "cd\nexit\n" 1 1
+assert_err_contains "HOME not set"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "cd_invalid_path" "cd /definitely/not/here\nexit\n" 1
+assert_err_contains "No such file or directory"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "cd_dash_roundtrip" "cd /tmp\ncd -\npwd\nexit\n" 0
+assert_out_contains "$ROOT_DIR"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_pwd_deleted_dir_case
+
+run_case "echo_flags" "echo -nn hi\necho hi-there\nexit\n" 0
+assert_out_contains "himinishell >"
+assert_out_contains "hi-there"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "env_builtin_with_arg" "env EXTRA\nexit\n" 1
+assert_err_contains "too many arguments"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "export_unset_cycle" \
+	"export FOO=bar\n/usr/bin/env\nunset FOO\n/usr/bin/env\nexit\n" \
+	0
+assert_out_regex_count "^FOO=bar$" 1
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "env_builtin_lists_exported" \
+	"export FOO=bar\nenv\nunset FOO\nenv\nexit\n" \
+	0
+assert_out_regex_count "^FOO=bar$" 1
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "export_invalid_identifier" "export 1A=2\nexit\n" 1
+assert_err_contains "not a valid identifier"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "unset_invalid_identifier" "unset 1A\nexit\n" 1
+assert_err_contains "not a valid identifier"
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+run_case "export_without_value" "unset ZZZ\nexport ZZZ\n/usr/bin/env\nexit\n" 0
+assert_out_regex_count "^ZZZ=$" 1
+if [ "$CASE_FAILED" -eq 0 ]; then
+	pass "$CASE_NAME assertions"
+fi
+
+printf "\nResumen tests builtins: PASS=%d FAIL=%d\n" "$PASS_COUNT" "$FAIL_COUNT"
+if [ "$FAIL_COUNT" -ne 0 ]; then
+	exit 1
+fi
+exit 0