builtin: implement pwd

Makefile

@@ -30,6 +30,8 @@ srcs = \
 	src/executing/here_doc/here_doc_expand_line.c \
 	src/executing/here_doc/random_filename.c \
 	src/executing/here_doc/strip_newline.c \
+	src/executing/simple_cmd/builtin_invalid.c \
+	src/executing/simple_cmd/builtin_pwd.c \
 	src/executing/simple_cmd/simple_cmd_execute.c \
 	src/ft_errno.c \
 	src/get_command.c \

src/executing/simple_cmd/builtin_invalid.c

@@ -0,0 +1,20 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   builtin_invalid.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/03/31 14:17:14 by khais             #+#    #+#             */
+/*   Updated: 2025/03/31 14:17:42 by khais            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+
+t_builtin_type	builtin_invalid(t_simple_cmd *cmd, t_minishell *app)
+{
+	(void)cmd;
+	(void)app;
+	return (BUILTIN_INVALID);
+}

src/executing/simple_cmd/builtin_pwd.c

@@ -0,0 +1,58 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   builtin_pwd.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/03/31 14:21:52 by khais             #+#    #+#             */
+/*   Updated: 2025/03/31 14:48:23 by khais            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "builtins.h"
+#include "libft.h"
+#include "../../ft_errno.h"
+#include "errno.h"
+
+static char	*get_current_dir(void)
+{
+	char	*path;
+	size_t	size;
+
+	size = 64;
+	path = ft_calloc(size, sizeof(char));
+	if (path == NULL)
+		return (ft_errno(FT_EERRNO), NULL);
+	while (getcwd(path, size) == NULL)
+	{
+		if (errno != ERANGE)
+			return (ft_errno(FT_EERRNO), NULL);
+		free(path);
+		size *= 2;
+		path = ft_calloc(size, sizeof(char));
+		if (path == NULL)
+			return (ft_errno(FT_EERRNO), NULL);
+	}
+	return (path);
+}
+
+t_builtin_type	builtin_pwd(t_simple_cmd *cmd, t_minishell *app)
+{
+	char	*path;
+
+	(void)cmd;
+	path = get_current_dir();
+	if (path == NULL)
+	{
+		app->last_return_value = 1;
+		ft_perror("pwd: failed to get current directory");
+	}
+	else
+	{
+		ft_printf("%s\n", path);
+		free(path);
+		app->last_return_value = 0;
+	}
+	return (BUILTIN_PWD);
+}

src/executing/simple_cmd/builtins.h

@@ -0,0 +1,21 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   builtins.h                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/03/31 14:16:13 by khais             #+#    #+#             */
+/*   Updated: 2025/03/31 14:21:46 by khais            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef BUILTINS_H
+# define BUILTINS_H
+
+# include "simple_cmd_execute.h"
+
+t_builtin_type	builtin_invalid(t_simple_cmd *cmd, t_minishell *app);
+t_builtin_type	builtin_pwd(t_simple_cmd *cmd, t_minishell *app);
+
+#endif // BUILTINS_H

src/executing/simple_cmd/simple_cmd_execute.c

@@ -6,11 +6,12 @@
 /*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/03/27 16:21:56 by khais             #+#    #+#             */
-/*   Updated: 2025/03/28 16:56:47 by khais            ###   ########.fr       */
+/*   Updated: 2025/03/31 14:21:40 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "simple_cmd_execute.h"
+#include "builtins.h"
 #include "libft.h"
 #include "../../subst/subst.h"
 #include "../../env/env_convert.h"
@@ -38,6 +39,28 @@ static void	command_not_found(t_simple_cmd *cmd)
 		cmd->words->word->word);
 }
 
+static t_builtin_type	get_builtin(t_simple_cmd *cmd)
+{
+	char	*word;
+
+	word = cmd->words->word->word;
+	if (ft_strcmp("pwd", word) == 0)
+		return (BUILTIN_PWD);
+	return (BUILTIN_INVALID);
+}
+
+static t_builtin_type	execute_builtin(t_simple_cmd *cmd, t_minishell *app)
+{
+	t_builtin_type			type;
+	static t_builtin_type	(*builtins[])(t_simple_cmd *, t_minishell *) = {
+	[BUILTIN_INVALID] = builtin_invalid,
+	[BUILTIN_PWD] = builtin_pwd,
+	};
+
+	type = get_builtin(cmd);
+	return (builtins[type](cmd, app));
+}
+
 void	simple_cmd_execute(t_simple_cmd *cmd, t_minishell *app)
 {
 	char	*exe;
@@ -45,6 +68,8 @@ void	simple_cmd_execute(t_simple_cmd *cmd, t_minishell *app)
 
 	if (cmd == NULL || cmd->words == NULL || cmd->words->word == NULL)
 		return ;
+	if (execute_builtin(cmd, app) != BUILTIN_INVALID)
+		return ;
 	exe = get_cmdpath(cmd->words->word->word, app);
 	if (exe == NULL)
 	{

src/executing/simple_cmd/simple_cmd_execute.h

@@ -6,7 +6,7 @@
 /*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/03/27 16:20:31 by khais             #+#    #+#             */
-/*   Updated: 2025/03/27 16:40:32 by khais            ###   ########.fr       */
+/*   Updated: 2025/03/31 13:59:26 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -18,4 +18,10 @@
 
 void	simple_cmd_execute(t_simple_cmd *cmd, t_minishell *app);
 
+typedef enum e_builtin_type
+{
+	BUILTIN_INVALID,
+	BUILTIN_PWD,
+}	t_builtin_type;
+
 #endif // SIMPLE_CMD_EXECUTE_H

test.sh

@@ -143,6 +143,39 @@ minishell: qwertyuiop: command not found
 minishell: poiuytrewq: command not found
 EOF
 
+when_run <<EOF "pwd works"
+pwd
+pwd hello
+pwd hello there
+pwd -O
+pwd -O hello
+pwd there -O hello
+EOF
+expecting <<EOF
+/tmp/dir.minishell
+/tmp/dir.minishell
+/tmp/dir.minishell
+/tmp/dir.minishell
+/tmp/dir.minishell
+/tmp/dir.minishell
+EOF
+
+when_run <<EOF "pwd works in any directory"
+mkdir test
+cd test
+pwd
+mkdir hi
+cd hi
+pwd
+cd ..
+pwd
+EOF
+todo <<EOF
+/tmp/dir.minishell/test
+/tmp/dir.minishell/test/hi
+/tmp/dir.minishell/test
+EOF
+
 when_run <<EOF "quoted parentheses are not operators"
 echo unclosed '('
 EOF