mirror of
https://github.com/git/git.git
synced 2024-10-30 05:47:53 +01:00
bfb6b53c05
The new method removes all common signal handlers that were installed by sigchain_push. CC: Jeff King <peff@peff.net> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
#include "cache.h"
|
|
#include "sigchain.h"
|
|
|
|
#define SIGCHAIN_MAX_SIGNALS 32
|
|
|
|
struct sigchain_signal {
|
|
sigchain_fun *old;
|
|
int n;
|
|
int alloc;
|
|
};
|
|
static struct sigchain_signal signals[SIGCHAIN_MAX_SIGNALS];
|
|
|
|
static void check_signum(int sig)
|
|
{
|
|
if (sig < 1 || sig >= SIGCHAIN_MAX_SIGNALS)
|
|
die("BUG: signal out of range: %d", sig);
|
|
}
|
|
|
|
int sigchain_push(int sig, sigchain_fun f)
|
|
{
|
|
struct sigchain_signal *s = signals + sig;
|
|
check_signum(sig);
|
|
|
|
ALLOC_GROW(s->old, s->n + 1, s->alloc);
|
|
s->old[s->n] = signal(sig, f);
|
|
if (s->old[s->n] == SIG_ERR)
|
|
return -1;
|
|
s->n++;
|
|
return 0;
|
|
}
|
|
|
|
int sigchain_pop(int sig)
|
|
{
|
|
struct sigchain_signal *s = signals + sig;
|
|
check_signum(sig);
|
|
if (s->n < 1)
|
|
return 0;
|
|
|
|
if (signal(sig, s->old[s->n - 1]) == SIG_ERR)
|
|
return -1;
|
|
s->n--;
|
|
return 0;
|
|
}
|
|
|
|
void sigchain_push_common(sigchain_fun f)
|
|
{
|
|
sigchain_push(SIGINT, f);
|
|
sigchain_push(SIGHUP, f);
|
|
sigchain_push(SIGTERM, f);
|
|
sigchain_push(SIGQUIT, f);
|
|
sigchain_push(SIGPIPE, f);
|
|
}
|
|
|
|
void sigchain_pop_common(void)
|
|
{
|
|
sigchain_pop(SIGPIPE);
|
|
sigchain_pop(SIGQUIT);
|
|
sigchain_pop(SIGTERM);
|
|
sigchain_pop(SIGHUP);
|
|
sigchain_pop(SIGINT);
|
|
}
|