2 #include "subcmd-util.h"
5 #define SIGCHAIN_MAX_SIGNALS 32
7 struct sigchain_signal {
12 static struct sigchain_signal signals[SIGCHAIN_MAX_SIGNALS];
14 static void check_signum(int sig)
16 if (sig < 1 || sig >= SIGCHAIN_MAX_SIGNALS)
17 die("BUG: signal out of range: %d", sig);
20 static int sigchain_push(int sig, sigchain_fun f)
22 struct sigchain_signal *s = signals + sig;
25 ALLOC_GROW(s->old, s->n + 1, s->alloc);
26 s->old[s->n] = signal(sig, f);
27 if (s->old[s->n] == SIG_ERR)
33 int sigchain_pop(int sig)
35 struct sigchain_signal *s = signals + sig;
40 if (signal(sig, s->old[s->n - 1]) == SIG_ERR)
46 void sigchain_push_common(sigchain_fun f)
48 sigchain_push(SIGINT, f);
49 sigchain_push(SIGHUP, f);
50 sigchain_push(SIGTERM, f);
51 sigchain_push(SIGQUIT, f);
52 sigchain_push(SIGPIPE, f);