dispatch.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   dispatch.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tgrekov <tgrekov@student.hive.fi>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/04/22 13:32:09 by tgrekov           #+#    #+#             */
/*   Updated: 2024/05/20 12:27:21 by tgrekov          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <libft.h>
#include <ft_printf.h>
#include "../utils/utils.h"
 
char    **args_split(char const *s);
char    *get_cmd(char **paths, char *name);
 
static int  _dispatch(char **paths, char **argv, char **envp, int *in_out)
{
    char    *cmd;
 
    cmd = get_cmd(paths, argv[0]);
    if (!cmd)
    {
        ft_printf("%>Command not found: %s\n", 2, argv[0]);
        return (127);
    }
    if (access(cmd, X_OK))
    {
        ft_printf("%>No access to execute \"%s\"\n", 2, cmd);
        return (126);
    }
    if (dup2(in_out[0], 0) == -1)
        return ((int) err("dup2()", (void *) 1));
    if (dup2(in_out[1], 1) == -1)
        return ((int) err("dup2()", (void *) 1));
    execve(cmd, argv, envp);
    free(cmd);
    ft_printf("%>execve() failed for \"%s\": %s\n", 2, cmd, strerror(errno));
    return (1);
}
 
void    dispatch(char **paths, char *args, char **envp, int *in_out)
{
    char    **child_argv;
    int     code;
 
    if (in_out[0] == -1 || in_out[1] == -1)
    {
        arr_free((void **) paths);
        exit(1);
    }
    code = 1;
    child_argv = ft_split(args, ' ');
    if (child_argv)
    {
        code = _dispatch(paths, child_argv, envp, in_out);
        arr_free((void **) child_argv);
    }
    else
        ft_printf("%>Could not split arguments \"%s\": %s\n",
            2, args, strerror(errno));
    arr_free((void **) paths);
    exit(code);
}