Revision ec0465ade87996214959a393239eec520daf92ea authored by Junio C Hamano on 20 March 2015, 20:11:48 UTC, committed by Junio C Hamano on 20 March 2015, 20:11:48 UTC
Portability fixes and workarounds for shell scripts have been added to help BSD-derived systems. * km/bsd-shells: t5528: do not fail with FreeBSD shell help.c: use SHELL_PATH instead of hard-coded "/bin/sh" git-compat-util.h: move SHELL_PATH default into header git-instaweb: use @SHELL_PATH@ instead of /bin/sh git-instaweb: allow running in a working tree subdirectory
sigchain.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);
}
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