minishell/executor_utils1.c at master · yuchi1025/minishell · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   executor_utils1.c                                  :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yucchen <yucchen@student.42singapore.sg    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/01/08 16:47:15 by yucchen           #+#    #+#             */
/*   Updated: 2026/01/09 14:52:05 by yucchen          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "parser.h"

void	ft_free_array(char **array)
{
	int	i;

	i = 0;
	if (!array)
		return ;
	while (array[i])
	{
		free(array[i]);
		i++;
	}
	free(array);
}

void	child_cleanup(t_cmd *cmd_head, t_env **env, char **envp)
{
	if (envp)
		ft_free_array(envp);
	if (cmd_head)
		free_cmd_list(cmd_head);
	if (env && *env)
		free_env_list(*env);
}

static void	child_error(t_child *child,	char *cmdname, char *msg, int code)
{
	ft_putstr_fd("minishell: ", 2);
	ft_putstr_fd(cmdname, 2);
	ft_putendl_fd(msg, 2);
	child_cleanup(child->cmd_head, child->env, child->envp);
	exit(code);
}

static void	map_error(char *full_path, t_cmd *cmd, t_child *child)
{
	execve(full_path, cmd->argv, child->envp);
	free(full_path);
	if (errno == ENOENT)
		child_error(child, cmd->argv[0], ": No such file or directory", 127);
	else if (errno == EISDIR)
		child_error(child, cmd->argv[0], ": Is a directory", 126);
	else if (errno == EACCES)
		child_error(child, cmd->argv[0], ": Permission denied", 126);
	else if (errno == ENOEXEC)
		child_error(child, cmd->argv[0], ": Exec format error", 126);
	else if (errno == ENOTDIR)
		child_error(child, cmd->argv[0], ": Not a directory", 126);
	ft_putstr_fd("minishell: ", 2);
	ft_putstr_fd(cmd->argv[0], 2);
	ft_putstr_fd(": ", 2);
	perror(NULL);
	child_cleanup(child->cmd_head, child->env, child->envp);
	exit(126);
}

void	try_exec(t_cmd *cmd, t_child *child)
{
	char		*full_path;
	struct stat	st;

	if (ft_strchr(cmd->argv[0], '/'))
	{
		full_path = ft_strdup(cmd->argv[0]);
		if (!full_path)
		{
			perror("malloc");
			child_cleanup(child->cmd_head, child->env, child->envp);
			exit(EXIT_FAILURE);
		}
		if (stat(full_path, &st) == 0 && S_ISDIR(st.st_mode))
		{
			free(full_path);
			child_error(child, cmd->argv[0], ": Is a directory", 126);
		}
	}
	else
		full_path = search_path(cmd->argv[0], child->envp);
	if (!full_path)
		child_error(child, cmd->argv[0], ": command not found", 127);
	map_error(full_path, cmd, child);
}