signals.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   signals.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dmdemirk <dmdemirk@student.42london.c      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/07/17 13:59:59 by dmdemirk          #+#    #+#             */
/*   Updated: 2024/09/09 12:32:04 by dmdemirk         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "signals.h"
#include <readline/readline.h>
#include <readline/history.h>
#include <unistd.h>
#include "libft.h"
 
void    signal_reset_prompt(int signo);
void    set_signals_interactive(void);
void    signal_print_newline(int signal);
void    sigquit_ignore(void);
void    set_signals_noninteractive(void);
 
void    signal_reset_prompt(int signo)
{
    (void)signo;
    write(1, "\n", 1);
    rl_on_new_line();
    rl_replace_line("", 0);
    rl_redisplay();
}
 
void    signal_print_newline(int signal)
{
    (void)signal;
    write(STDOUT_FILENO, "\n", 1);
    rl_on_new_line();
}
 
void    sigquit_ignore(void)
{
    struct sigaction    a;
 
    sigemptyset(&a.sa_mask);
    a.sa_flags = 0;
    a.sa_handler = SIG_IGN;
    sigaction(SIGQUIT, &a, NULL);
}
 
void    set_signals_interactive(void)
{
    struct sigaction    a;
 
    sigquit_ignore();
    sigemptyset(&a.sa_mask);
    a.sa_flags = 0;
    a.sa_handler = *signal_reset_prompt;
    a.sa_flags |= SA_RESTART;
    sigaction(SIGINT, &a, NULL);
}
 
void    set_signals_noninteractive(void)
{
    struct sigaction    a;
 
    sigemptyset(&a.sa_mask);
    a.sa_flags = 0;
    a.sa_handler = &signal_print_newline;
    sigaction(SIGINT, &a, NULL);
    a.sa_handler = SIG_IGN;
    sigaction(SIGQUIT, &a, NULL);
}