redirect_append.c

Go to the documentation of this file.

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   redirect_append.c                                  :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dmdemirk <dmdemirk@student.42london.c      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/08 15:13:15 by dmdemirk          #+#    #+#             */
/*   Updated: 2024/11/08 15:13:40 by dmdemirk         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "tokens.h"
#include "shell.h"
#include "redirection.h"
#include "execute.h"
#include "pipe.h"
#include <sys/wait.h>
 
static int  open_and_redirect(t_ast *node, t_ms_data *data)
{
    int fd;
 
    if (data->std_out == -1)
    {
        data->std_out = open_file(node->right, ">>");
        if (data->std_out == -1)
            return (EXIT_FAILURE);
    }
    else
    {
        fd = open_file(node->right, ">>");
        if (fd == -1)
            return (EXIT_FAILURE);
        dup2(fd, STDOUT_FILENO);
        close(fd);
    }
    return (EXIT_SUCCESS);
}
 
int redirect_append(t_ast *node, t_ms_data *data)
{
    pid_t   pid;
    int     exec_status;
    int     status;
 
    pid = fork();
    if (pid == -1)
        return (EXIT_FAILURE);
    if (pid == 0)
    {
        if (open_and_redirect(node, data) != 0)
            exit(EXIT_FAILURE);
        exec_status = execute_ast(node->left, data);
        exit(exec_status);
    }
    if (waitpid(pid, &status, 0) == -1)
        return (EXIT_FAILURE);
    if (WIFSIGNALED(status))
        return (128 + WTERMSIG(status));
    return (WEXITSTATUS(status));
}