Explicitly set sa_flags in sigaction.

src/main.c

@@ -109,6 +109,7 @@ int main(int argc, char *argv[])
 
     act.sa_handler = sigalrm;
     sigemptyset(&act.sa_mask);
+    act.sa_flags = SA_RESTART;
     if (sigaction(SIGALRM, &act, NULL) < 0) {
         fprintf(stderr, "%s: sigaction() failed: %s\n",
                 argv[0], strerror(errno));
@@ -116,6 +117,7 @@ int main(int argc, char *argv[])
     }
 
     act.sa_handler = sigxcpu;
+    act.sa_flags = SA_RESTART;
     sigemptyset(&act.sa_mask);
     if (sigaction(SIGXCPU, &act, NULL) < 0) {
         fprintf(stderr, "%s: sigaction() failed: %s\n",

src/queue.c

@@ -359,7 +359,8 @@ void HandleQueuedReminders(void)
 
     if (ShouldFork || Daemon) {
         sa.sa_handler = SigIntHandler;
-        sa.sa_flags = 0;
+        sa.sa_flags = SA_RESTART;
+        sigemptyset(&sa.sa_mask);
         (void) sigaction(SIGINT, &sa, NULL);
         sa.sa_handler = SigContHandler;
         (void) sigaction(SIGCONT, &sa, NULL);