mirror of
https://codeberg.org/la-chouette/minishell.git
synced 2025-12-06 07:28:09 +01:00
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* sig.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jguelen <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/02/20 10:26:05 by jguelen #+# #+# */
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/* Updated: 2025/04/04 16:58:58 by khais ### ########.fr */
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/* */
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/* ************************************************************************** */
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// stdio must be included before readline
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#include <stdio.h>
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#include "readline/readline.h"
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#include "sig.h"
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#include "signal.h"
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/*
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** g_signum exists to store the value of a signal if relevant for later
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** processing.
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** NOTE: g_signum starts at 0 and should be set back to 0 after the information
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** it stores has been properly processed.
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*/
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int g_signum = 0;
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/*
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** redisplay prompt
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*/
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static void sig_interactive(int signum)
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{
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(void)signum;
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rl_replace_line("", 0);
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ft_printf("\n");
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rl_on_new_line();
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rl_redisplay();
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}
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void readline_reset(void)
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{
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rl_replace_line("", 0);
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ft_printf("\n");
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rl_redisplay();
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}
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/*
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** Stores the value of the caught signal in g_signum for later processing.
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*/
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static void sig_cmd(int signum, siginfo_t *siginfo, void *context)
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{
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(void)context;
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(void)siginfo;
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g_signum = signum;
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}
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/*
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** Catches SIGINT and SIGQUIT.
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** Set to ignore SIGQUIT and catch SIGINT to set g_signum for
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** further processing when in interactive mode.
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*/
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int set_interactive_mode_sig_handling(void)
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{
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struct sigaction sig_act;
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ft_bzero(&sig_act, sizeof(struct sigaction));
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sig_act.sa_handler = &sig_interactive;
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sig_act.sa_flags |= SA_RESTART;
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if (sigemptyset(&sig_act.sa_mask) == -1)
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return (-1);
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if (sigaction(SIGINT, &sig_act, NULL) == -1)
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return (-1);
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sig_act.sa_handler = SIG_IGN;
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if (sigaction(SIGQUIT, &sig_act, NULL) == -1)
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return (-1);
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return (0);
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}
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/*
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** Set to ignore SIGINT and SIGQUIT signals if they are generated through
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** a call to kill when the program is currently executing commands.
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** Otherwise set g_signum to the number corresponding to the caught signal.
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*/
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int set_exec_mode_sig_handling(void)
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{
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struct sigaction sig_act;
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ft_bzero(&sig_act, sizeof(struct sigaction));
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if (sigemptyset(&sig_act.sa_mask) == -1)
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return (-1);
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sig_act.sa_sigaction = &sig_cmd;
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sig_act.sa_flags |= SA_SIGINFO;
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sig_act.sa_flags |= SA_RESTART;
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if (sigaction(SIGINT, &sig_act, NULL) == -1)
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return (-1);
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if (sigaction(SIGQUIT, &sig_act, NULL) == -1)
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return (-1);
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return (0);
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}
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