exec: correct error and return value when cmd is a directory

minishell: /: Is a directory
$? = 126

src/executing/simple_cmd/subprocess.c

@@ -6,7 +6,7 @@
 /*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2025/04/02 18:19:23 by khais             #+#    #+#             */
-/*   Updated: 2025/04/02 18:20:54 by khais            ###   ########.fr       */
+/*   Updated: 2025/04/08 13:23:59 by khais            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,7 +14,10 @@
 #include "../../env/env_convert.h"
 #include "../../parser/simple_cmd/simple_cmd.h"
 #include "../../subst/path_split.h"
+#include <dirent.h>
+#include "../../ft_errno.h"
 #include <stdio.h>
+#include <errno.h>
 
 static char	**argv_from_wordlist(t_wordlist *wordlist)
 {
@@ -31,20 +34,51 @@ static char	**argv_from_wordlist(t_wordlist *wordlist)
 	return (out);
 }
 
-static void	ft_execve(char *exe, char **argv, char **envp)
+static bool	ft_is_directory(char *path)
 {
+	DIR		*dir;
+	bool	retvalue;
+
+	errno = 0;
+	retvalue = true;
+	dir = opendir(path);
+	if (errno == ENOTDIR)
+		retvalue = false;
+	if (dir != NULL)
+		closedir(dir);
+	return (retvalue);
+}
+
+static int	ft_execve(char *exe, char **argv, char **envp)
+{
+	int	retvalue;
+
+	retvalue = 127;
 	execve(exe, argv, envp);
+	if (ft_is_directory(exe))
+	{
+		ft_dprintf(STDERR_FILENO, "minishell: %s: %s\n", argv[0],
+			strerror(EISDIR));
+		retvalue = 126;
+	}
+	else
+	{
 		ft_dprintf(STDERR_FILENO, "minishell: %s: ", argv[0]);
-	perror(NULL);
+		ft_perror(NULL);
+	}
 	free(exe);
 	path_split_destroy(argv);
 	path_split_destroy(envp);
+	return (retvalue);
 }
 
 void	execute_subprocess(char *exe, t_simple_cmd *cmd, t_minishell *app)
 {
-	ft_execve(exe, argv_from_wordlist(cmd->words), envp_from_env(app->env));
+	int	retvalue;
+
+	retvalue = ft_execve(exe, argv_from_wordlist(cmd->words),
+			envp_from_env(app->env));
 	simple_cmd_destroy(cmd);
 	env_destroy(app->env);
-	exit(127);
+	exit(retvalue);
 }

test.sh

@@ -131,6 +131,51 @@ EOF
 expecting <<EOF
 EOF
 
+when_run <<EOF "/ is a directory"
+/
+echo \$?
+EOF
+expecting <<EOF
+minishell: /: Is a directory
+126
+EOF
+
+when_run <<EOF "// is a directory"
+//
+echo \$?
+EOF
+expecting <<EOF
+minishell: //: Is a directory
+126
+EOF
+
+when_run <<EOF "/. is a directory"
+/.
+echo \$?
+EOF
+expecting <<EOF
+minishell: /.: Is a directory
+126
+EOF
+
+when_run <<EOF "/./../../../../.. is a directory"
+/./../../../../..
+echo \$?
+EOF
+expecting <<EOF
+minishell: /./../../../../..: Is a directory
+126
+EOF
+
+when_run <<EOF "//////// is a directory"
+////////
+echo \$?
+EOF
+expecting <<EOF
+minishell: ////////: Is a directory
+126
+EOF
+
 when_run <<EOF "simple commands are run"
 echo no files:
 ls -a