basic: mark unused variable as such

[elogind.git] / src / basic / signal-util.h

diff --git a/src/basic/signal-util.h b/src/basic/signal-util.h
index b746e5cb896561c2c2e0f6fbb520a7e0d43e1cee..cbdb6ce33aac06b5bd58928f2052208079f3e423 100644 (file)
--- a/src/basic/signal-util.h
+++ b/src/basic/signal-util.h
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
 #pragma once
 
 /***
@@ -29,8 +27,7 @@ int reset_all_signal_handlers(void);
 int reset_signal_mask(void);
 
 int ignore_signals(int sig, ...);
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 int default_signals(int sig, ...);
 int sigaction_many(const struct sigaction *sa, ...);
 #endif // 0
@@ -42,7 +39,18 @@ const char *signal_to_string(int i) _const_;
 int signal_from_string(const char *s) _pure_;
 
 int signal_from_string_try_harder(const char *s);
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
+
 void nop_signal_handler(int sig);
 #endif // 0
+
+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;                                                                \
+        })