minishell/executor_utils2.c at master · yuchi1025/minishell · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   executor_utils2.c                                  :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yucchen <yucchen@student.42singapore.sg    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/01/08 16:47:34 by yucchen           #+#    #+#             */
/*   Updated: 2026/01/09 14:52:15 by yucchen          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "parser.h"

// redir-only commands still should create/truncate files
void	exec_child_cmd(t_cmd *cmd, t_env **env, char **envp, t_cmd *cmd_head)
{
	int			code;
	t_child		child;

	child.cmd_head = cmd_head;
	child.env = env;
	child.envp = envp;
	if (apply_redirs(cmd))
	{
		child_cleanup(child.cmd_head, child.env, child.envp);
		exit(EXIT_FAILURE);
	}
	if (!cmd->argv || !cmd->argv[0])
	{
		child_cleanup(child.cmd_head, child.env, child.envp);
		exit(EXIT_SUCCESS);
	}
	if (is_builtin(cmd->argv[0]))
	{
		code = run_builtin(cmd, env);
		child_cleanup(child.cmd_head, child.env, child.envp);
		exit(code);
	}
	try_exec(cmd, &child);
}

static void	restore_error(int dup_stdin, int dup_stdout)
{
	if (dup2(dup_stdin, STDIN_FILENO) == -1)
		perror("dup2 restore stdin");
	if (dup2(dup_stdout, STDOUT_FILENO) == -1)
		perror("dup2 restore stdout");
}

int	run_exit_in_parent(t_cmd *cmd)
{
	int	dup_stdin;
	int	dup_stdout;
	int	need_exit;

	need_exit = 0;
	ft_putendl_fd("exit", 2);
	if (!cmd->redirs)
		return (should_exit(cmd->argv));
	dup_stdin = dup(STDIN_FILENO);
	dup_stdout = dup(STDOUT_FILENO);
	if (dup_stdin == -1 || dup_stdout == -1)
	{
		if (dup_stdin != -1)
			close(dup_stdin);
		if (dup_stdout != -1)
			close(dup_stdout);
		return (perror("dup"), g_last_status = 1, 0);
	}
	if (!apply_redirs(cmd))
		need_exit = should_exit(cmd->argv);
	else
		g_last_status = 1;
	restore_error(dup_stdin, dup_stdout);
	return (close(dup_stdin), close(dup_stdout), need_exit);
}

int	run_builtin_in_parent(t_cmd *cmd, t_env **env)
{
	int	dup_stdin;
	int	dup_stdout;

	if (!cmd->redirs)
		return (g_last_status = run_builtin(cmd, env), 0);
	dup_stdin = dup(STDIN_FILENO);
	dup_stdout = dup(STDOUT_FILENO);
	if (dup_stdin == -1 || dup_stdout == -1)
	{
		if (dup_stdin != -1)
			close(dup_stdin);
		if (dup_stdout != -1)
			close(dup_stdout);
		return (perror("dup"), g_last_status = 1, 0);
	}
	if (!apply_redirs(cmd))
		g_last_status = run_builtin(cmd, env);
	else
		g_last_status = 1;
	restore_error(dup_stdin, dup_stdout);
	return (close(dup_stdin), close(dup_stdout), 0);
}

void	exitcode_from_status(int status)
{
	if (WIFEXITED(status))
		g_last_status = WEXITSTATUS(status);
	else if (WIFSIGNALED(status))
	{
		if (WTERMSIG(status) == SIGINT)
			write(1, "\n", 1);
		else if (WTERMSIG(status) == SIGQUIT)
			write(1, "Quit (core dumped)\n", 19);
		g_last_status = 128 + WTERMSIG(status);
	}
	else
		g_last_status = 1;
}