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Signal: A basic version for the capture of signals.

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Jérôme Guélen 2025-02-21 15:10:46 +01:00 • committed by Khaïs COLIN
parent 837abc8361
commit 83d88681a2
2 changed files with 29 additions and 18 deletions
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41
src/sig/sig.c
View file

@ -6,15 +6,31 @@
/* By: jguelen <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/02/20 10:26:05 by jguelen #+# #+# */
/* Updated: 2025/02/20 18:03:06 by jguelen ### ########.fr */
/* Updated: 2025/02/21 14:48:48 by jguelen ### ########.fr */
/* */
/* ************************************************************************** */
#include "sig.h"
// TODO Check the return values and implement handlers
int g_signum = 0;
int set_interactive_mode_sig_handling(void)
static void sig_interactive(int signum)
{
g_signum = signum;
}
/*
** Ignores the signal if it was sent by a kill command.
*/
static void ignoreif_sent_by_kill(int signum, siginfo_t *siginfo, void *context)
{
(void *)context;
if (siginfo->si_code == SI_USER)
return ;
g_signum = signum;
}
int set_interactive_mode_sig_handling(void)
{
struct sigaction sig_act;
@ -30,27 +46,18 @@ int set_interactive_mode_sig_handling(void)
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)
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_sigaction = &ignoreif_sent_by_kill;
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)
if (sigaction(SIGQUIT, &sig_act, NULL) == -1)
return (-1);
return (0);
}
@ -61,7 +68,7 @@ int set_exec_mode_sig_handling(void)
** @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)
int set_default_sig_handling(void)
{
struct sigaction sig;
int i;
@ -71,7 +78,7 @@ int set_default_sig_handling(void)
if (sigemptyset(sig.sa_mask) == -1)
return (-1);
i = 0;
while (i < 128)
while (i < NSIG)
{
if (sigaction(i, &sig, NULL) == -1)
return (-1);

6
src/sig/sig.h
View file

@ -6,7 +6,7 @@
/* By: jguelen <jguelen@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/02/19 18:21:55 by jguelen #+# #+# */
/* Updated: 2025/02/20 16:37:19 by jguelen ### ########.fr */
/* Updated: 2025/02/21 13:52:47 by jguelen ### ########.fr */
/* */
/* ************************************************************************** */
@ -17,6 +17,10 @@
# include <stddef.h>
# include <asm-generic/signal-defs.h>
# define NSIG 64
extern int g_signum;
int set_interactive_mode_sig_handling(void);
int set_exec_mode_sig_handling(void);
int set_default_sig_handling(void);