| Directory: | src/ |
|---|---|
| File: | src/signal.c |
| Date: | 2024-04-25 03:45:42 |
| Exec | Total | Coverage | |
|---|---|---|---|
| Lines: | 31 | 38 | 81.6% |
| Branches: | 5 | 10 | 50.0% |
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2022 Egor Tensin <egor@tensin.name> | ||
| 3 | * This file is part of the "cimple" project. | ||
| 4 | * For details, see https://github.com/egor-tensin/cimple. | ||
| 5 | * Distributed under the MIT License. | ||
| 6 | */ | ||
| 7 | |||
| 8 | #include "signal.h" | ||
| 9 | #include "file.h" | ||
| 10 | #include "log.h" | ||
| 11 | |||
| 12 | #include <signal.h> | ||
| 13 | #include <stddef.h> | ||
| 14 | #include <sys/signalfd.h> | ||
| 15 | |||
| 16 | static int sigterm_signals[] = {SIGINT, SIGTERM, SIGQUIT}; | ||
| 17 | |||
| 18 | 27703 | static void sigterms_mask(sigset_t *set) | |
| 19 | { | ||
| 20 | 27703 | sigemptyset(set); | |
| 21 |
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110812 | for (size_t i = 0; i < sizeof(sigterm_signals) / sizeof(sigterm_signals[0]); ++i) |
| 22 | 83109 | sigaddset(set, sigterm_signals[i]); | |
| 23 | 27703 | } | |
| 24 | |||
| 25 | 82943 | static int signal_set_mask_internal(const sigset_t *new, sigset_t *old) | |
| 26 | { | ||
| 27 | 82943 | int ret = 0; | |
| 28 | |||
| 29 | 82943 | ret = pthread_sigmask(SIG_SETMASK, new, old); | |
| 30 |
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82943 | if (ret) { |
| 31 | ✗ | pthread_errno(ret, "pthread_sigmask"); | |
| 32 | ✗ | return ret; | |
| 33 | } | ||
| 34 | |||
| 35 | 82943 | return ret; | |
| 36 | } | ||
| 37 | |||
| 38 | 27620 | int signal_set_mask(const sigset_t *new) | |
| 39 | { | ||
| 40 | 27620 | return signal_set_mask_internal(new, NULL); | |
| 41 | } | ||
| 42 | |||
| 43 | 27620 | int signal_block_all(sigset_t *old) | |
| 44 | { | ||
| 45 | sigset_t new; | ||
| 46 | 27620 | sigfillset(&new); | |
| 47 | 27620 | return signal_set_mask_internal(&new, old); | |
| 48 | } | ||
| 49 | |||
| 50 | 27620 | int signal_block_sigterms(void) | |
| 51 | { | ||
| 52 | sigset_t set; | ||
| 53 | 27620 | sigterms_mask(&set); | |
| 54 | 27620 | return signal_set_mask_internal(&set, NULL); | |
| 55 | } | ||
| 56 | |||
| 57 | 83 | int signalfd_create(const sigset_t *set) | |
| 58 | { | ||
| 59 | static const int flags = SFD_CLOEXEC; | ||
| 60 | sigset_t old; | ||
| 61 | 83 | int ret = 0; | |
| 62 | |||
| 63 | 83 | ret = signal_set_mask_internal(set, &old); | |
| 64 |
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83 | if (ret < 0) |
| 65 | ✗ | return ret; | |
| 66 | |||
| 67 | 83 | ret = signalfd(-1, set, flags); | |
| 68 |
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83 | if (ret < 0) |
| 69 | ✗ | goto restore; | |
| 70 | |||
| 71 | 83 | return ret; | |
| 72 | |||
| 73 | ✗ | restore: | |
| 74 | ✗ | signal_set_mask_internal(&old, NULL); | |
| 75 | |||
| 76 | ✗ | return ret; | |
| 77 | } | ||
| 78 | |||
| 79 | 83 | int signalfd_create_sigterms(void) | |
| 80 | { | ||
| 81 | sigset_t set; | ||
| 82 | 83 | sigterms_mask(&set); | |
| 83 | 83 | return signalfd_create(&set); | |
| 84 | } | ||
| 85 | |||
| 86 | 83 | void signalfd_destroy(int fd) | |
| 87 | { | ||
| 88 | 83 | file_close(fd); | |
| 89 | 83 | } | |
| 90 |