| // SPDX-License-Identifier: GPL-2.0 |
| #define SIGCHAIN_MAX_SIGNALS 32 |
| 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); |
| static int sigchain_push(int sig, sigchain_fun f) |
| struct sigchain_signal *s = signals + sig; |
| ALLOC_GROW(s->old, s->n + 1, s->alloc); |
| s->old[s->n] = signal(sig, f); |
| if (s->old[s->n] == SIG_ERR) |
| int sigchain_pop(int sig) |
| struct sigchain_signal *s = signals + sig; |
| if (signal(sig, s->old[s->n - 1]) == SIG_ERR) |
| 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); |