execute.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   execute.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: baelgadi <baelgadi@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/02/17 17:49:19 by zotaj-di          #+#    #+#             */
/*   Updated: 2026/03/04 05:02:51 by baelgadi         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include <sys/wait.h>
#include <fcntl.h>
#include "minishell_ui.h"
#include "env.h"
#include "get_next_line.h"
 
static int  init_pipe_and_fds(int *pipe_fd, int *saved_fds, t_ui *ui)
{
    if (pipe(pipe_fd) == -1)
    {
        out_add_line(&ui->out, "Error: pipe creation failed");
        ui->out.exit_code = 1;
        update_waifu_mood(ui, MOOD_UPSET);
        return (-1);
    }
    saved_fds[0] = dup(STDOUT_FILENO);
    saved_fds[1] = dup(STDERR_FILENO);
    return (0);
}
 
static void handle_fork_error(t_ui *ui, int *pipe_fd, int *saved_fds)
{
    close(pipe_fd[0]);
    close(pipe_fd[1]);
    close(saved_fds[0]);
    close(saved_fds[1]);
    out_add_line(&ui->out, "Error: fork failed");
    ui->out.exit_code = 1;
    update_waifu_mood(ui, MOOD_UPSET);
}
 
static void exec_child(int *pipe_fd, int *saved_fds, t_shell *shell)
{
    int status;
    int dev_null;
 
    close(pipe_fd[0]);
    close(saved_fds[0]);
    close(saved_fds[1]);
    dev_null = open("/dev/null", O_RDONLY);
    if (dev_null >= 0)
    {
        dup2(dev_null, STDIN_FILENO);
        close(dev_null);
    }
    dup2(pipe_fd[1], STDOUT_FILENO);
    dup2(pipe_fd[1], STDERR_FILENO);
    close(pipe_fd[1]);
    status = process_ui_input(shell->ui->cmd.buf, shell);
    out_free(&shell->ui->out);
    free(shell->ui);
    free_env_list(&shell->env);
    get_next_line(-42);
    exit(status);
}
 
static void exec_parent(int *pipe_fd, int *saved_fds, t_shell *sh, pid_t pid)
{
    int status;
 
    close(pipe_fd[1]);
    read_output_from_fd(sh->ui, pipe_fd[0]);
    close(pipe_fd[0]);
    dup2(saved_fds[0], STDOUT_FILENO);
    dup2(saved_fds[1], STDERR_FILENO);
    close(saved_fds[0]);
    close(saved_fds[1]);
    waitpid(pid, &status, 0);
    if (WIFEXITED(status))
        sh->ui->out.exit_code = WEXITSTATUS(status);
    else
        sh->ui->out.exit_code = 1;
    if (sh->ui->out.exit_code == 0)
        update_waifu_mood(sh->ui, MOOD_PROUD);
    else
        update_waifu_mood(sh->ui, MOOD_UPSET);
}
 
void    execute_minishell_cmd(t_shell *shell)
{
    int     pipe_fd[2];
    int     saved_fds[2];
    pid_t   pid;
 
    if (!shell || !shell->ui)
        return ;
    update_waifu_mood(shell->ui, MOOD_HAPPY);
    if (init_pipe_and_fds(pipe_fd, saved_fds, shell->ui) == -1)
        return ;
    pid = fork();
    if (pid == -1)
    {
        handle_fork_error(shell->ui, pipe_fd, saved_fds);
        return ;
    }
    if (pid == 0)
        exec_child(pipe_fd, saved_fds, shell);
    else
        exec_parent(pipe_fd, saved_fds, shell, pid);
}