1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2 #pragma once
3
4 #include <signal.h>
5
6 #include "macro.h"
7
8 int reset_all_signal_handlers(void);
9 int reset_signal_mask(void);
10
11 int sigaction_many_internal(const struct sigaction *sa, ...);
12
13 #define ignore_signals(...) \
14 sigaction_many_internal( \
15 &(const struct sigaction) { \
16 .sa_handler = SIG_IGN, \
17 .sa_flags = SA_RESTART \
18 }, \
19 __VA_ARGS__, \
20 -1)
21
22 #define default_signals(...) \
23 sigaction_many_internal( \
24 &(const struct sigaction) { \
25 .sa_handler = SIG_DFL, \
26 .sa_flags = SA_RESTART \
27 }, \
28 __VA_ARGS__, \
29 -1)
30
31 #define sigaction_many(sa, ...) \
32 sigaction_many_internal(sa, __VA_ARGS__, -1)
33
34 int sigset_add_many(sigset_t *ss, ...);
35 int sigprocmask_many(int how, sigset_t *old, ...);
36
37 const char *signal_to_string(int i) _const_;
38 int signal_from_string(const char *s) _pure_;
39
40 void nop_signal_handler(int sig);
41
block_signals_reset(sigset_t * ss)42 static inline void block_signals_reset(sigset_t *ss) {
43 assert_se(sigprocmask(SIG_SETMASK, ss, NULL) >= 0);
44 }
45
46 #define BLOCK_SIGNALS(...) \
47 _cleanup_(block_signals_reset) _unused_ sigset_t _saved_sigset = ({ \
48 sigset_t _t; \
49 assert_se(sigprocmask_many(SIG_BLOCK, &_t, __VA_ARGS__, -1) >= 0); \
50 _t; \
51 })
52
SIGNAL_VALID(int signo)53 static inline bool SIGNAL_VALID(int signo) {
54 return signo > 0 && signo < _NSIG;
55 }
56
signal_to_string_with_check(int n)57 static inline const char* signal_to_string_with_check(int n) {
58 if (!SIGNAL_VALID(n))
59 return NULL;
60
61 return signal_to_string(n);
62 }
63
64 int signal_is_blocked(int sig);
65
66 int pop_pending_signal_internal(int sig, ...);
67 #define pop_pending_signal(...) pop_pending_signal_internal(__VA_ARGS__, -1)
68