/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   sig.c                                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jguelen <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/02/20 10:26:05 by jguelen           #+#    #+#             */
/*   Updated: 2025/02/20 18:03:06 by jguelen          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "sig.h"

// TODO Check the return values and implement handlers

int set_interactive_mode_sig_handling(void)
{
	struct sigaction	sig_act;

	ft_bzero(&sig_act);
	sig_act.sa_handler = &sig_int_new_prompt;
	if (sigemptyset(sig_act.sa_mask) == -1)
		return (-1);
	if (sigaction(SIGINT, &sig_act, NULL) == -1)
		return (-1);
	sig_act.sa_handler = SIG_IGN;
	if (sigaction(SIGQUIT, &sig_act, NULL) == -1)
		return (-1);
	return (0);
}

/*
** in case a SIGINT is sent by kill
** deals with a SIGQUIT the same way as above
*/
int set_exec_mode_sig_handling(void)
{
	struct sigaction	sig_act;
	struct sigaction	sig_hand;

	ft_bzero(&sig_act);
	if (sigemptyset(sig_act.sa_mask) == -1)
		return (-1);
	sig_act.sa_sigaction = &ignoreif_sent_by_kill; //ignore if code == SI_USER
	sig_act.sa_flags |= SA_SIGINFO;
	if (sigaction(SIGINT, &sig_act, NULL) == -1)
		return (-1);
	ft_bzero(&sig_hand);
	if (sigemptyset(sig_hand.sa_mask) == -1)
		return (-1);
	sig_hand.sa_handler = SIG_DFL;
	if (sigaction(SIGQUIT, &sig_hand, NULL) == -1)
		return (-1);
	return (0);
}

/*
** Can be used at the start of a child process.
** Check if necessary since execve is executed.
** @RETURN Return 0 i case of success, -1 in case of error and errno is set
** to indicate the error.
*/
int set_default_sig_handling(void)
{
	struct sigaction	sig;
	int					i;

	ft_bzero(&sig);
	sig.sa_handler = SIG_DFL;
	if (sigemptyset(sig.sa_mask) == -1)
		return (-1);
	i = 0;
	while (i < 128)
	{
		if (sigaction(i, &sig, NULL) == -1)
			return (-1);
		i++;
	}
	return (0);
}