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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
commitb750101eb236130cf056c675997decbac904cc49 (patch)
treea5df1a06754bdd014cb975c051c83b01c9a97532 /src/basic/signal-util.h
parentInitial commit. (diff)
downloadsystemd-b750101eb236130cf056c675997decbac904cc49.tar.xz
systemd-b750101eb236130cf056c675997decbac904cc49.zip
Adding upstream version 252.22.upstream/252.22
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/basic/signal-util.h')
-rw-r--r--src/basic/signal-util.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/basic/signal-util.h b/src/basic/signal-util.h
new file mode 100644
index 0000000..36372c1
--- /dev/null
+++ b/src/basic/signal-util.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <signal.h>
+
+#include "macro.h"
+
+int reset_all_signal_handlers(void);
+int reset_signal_mask(void);
+
+int sigaction_many_internal(const struct sigaction *sa, ...);
+
+#define ignore_signals(...) \
+ sigaction_many_internal( \
+ &(const struct sigaction) { \
+ .sa_handler = SIG_IGN, \
+ .sa_flags = SA_RESTART \
+ }, \
+ __VA_ARGS__, \
+ -1)
+
+#define default_signals(...) \
+ sigaction_many_internal( \
+ &(const struct sigaction) { \
+ .sa_handler = SIG_DFL, \
+ .sa_flags = SA_RESTART \
+ }, \
+ __VA_ARGS__, \
+ -1)
+
+#define sigaction_many(sa, ...) \
+ sigaction_many_internal(sa, __VA_ARGS__, -1)
+
+int sigset_add_many(sigset_t *ss, ...);
+int sigprocmask_many(int how, sigset_t *old, ...);
+
+const char *signal_to_string(int i) _const_;
+int signal_from_string(const char *s) _pure_;
+
+void nop_signal_handler(int sig);
+
+static inline void block_signals_reset(sigset_t *ss) {
+ assert_se(sigprocmask(SIG_SETMASK, ss, NULL) >= 0);
+}
+
+#define BLOCK_SIGNALS(...) \
+ _cleanup_(block_signals_reset) _unused_ sigset_t _saved_sigset = ({ \
+ sigset_t _t; \
+ assert_se(sigprocmask_many(SIG_BLOCK, &_t, __VA_ARGS__, -1) >= 0); \
+ _t; \
+ })
+
+static inline bool SIGNAL_VALID(int signo) {
+ return signo > 0 && signo < _NSIG;
+}
+
+static inline const char* signal_to_string_with_check(int n) {
+ if (!SIGNAL_VALID(n))
+ return NULL;
+
+ return signal_to_string(n);
+}
+
+int signal_is_blocked(int sig);
+
+int pop_pending_signal_internal(int sig, ...);
+#define pop_pending_signal(...) pop_pending_signal_internal(__VA_ARGS__, -1)