minishell/src/executing/simple_cmd/simple_cmd_execute.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   simple_cmd_execute.c                               :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/03/27 16:21:56 by khais             #+#    #+#             */
/*   Updated: 2025/04/01 18:08:02 by khais            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "simple_cmd_execute.h"
#include "builtins.h"
#include "libft.h"
#include "../../subst/subst.h"
#include "../../env/env_convert.h"
#include <unistd.h>
#include <sys/wait.h>
#include <stdio.h>
#include "../../subst/path_split.h"

static char	**argv_from_wordlist(t_wordlist *wordlist)
{
	char	**out;
	int		i;

	out = ft_calloc(wordlist_size(wordlist) + 1, sizeof(char *));
	i = 0;
	while (wordlist != NULL)
	{
		out[i++] = ft_strdup(wordlist->word->word);
		wordlist = wordlist->next;
	}
	return (out);
}

static void	command_not_found(t_simple_cmd *cmd)
{
	ft_dprintf(STDERR_FILENO, "minishell: %s: command not found\n",
		cmd->words->word->word);
}

static void	ft_execve(char *exe, char **argv, char **envp)
{
	execve(exe, argv, envp);
	ft_dprintf(STDERR_FILENO, "minishell: %s: ", argv[0]);
	perror(NULL);
	free(exe);
	path_split_destroy(argv);
	path_split_destroy(envp);
}

static 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));
	simple_cmd_destroy(cmd);
	env_destroy(app->env);
	exit(127);
}

void	simple_cmd_execute(t_simple_cmd *cmd, t_minishell *app)
{
	char	*exe;
	int		pid;

	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)
	{
		command_not_found(cmd);
		return ;
	}
	pid = fork();
	if (pid == 0)
		execute_subprocess(exe, cmd, app);
	free(exe);
	waitpid(pid, NULL, 0);
	return ;
}