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