signal-util: generalize sigaction_nop_nocldstop

src/basic/signal-util.c

@@ -302,6 +302,11 @@ const struct sigaction sigaction_default = {
         .sa_flags = SA_RESTART,
 };
 
+const struct sigaction sigaction_nop_nocldstop = {
+        .sa_handler = nop_signal_handler,
+        .sa_flags = SA_NOCLDSTOP|SA_RESTART,
+};
+
 int parse_signo(const char *s, int *ret) {
         int sig, r;
 

src/basic/signal-util.h

@@ -68,5 +68,6 @@ void propagate_signal(int sig, siginfo_t *siginfo);
 
 extern const struct sigaction sigaction_ignore;
 extern const struct sigaction sigaction_default;
+extern const struct sigaction sigaction_nop_nocldstop;
 
 int parse_signo(const char *s, int *ret);