Preparing for full PR idaholab#12722

framework/src/base/MooseInit.C

@@ -37,39 +37,35 @@ void my_sig_handler (int signum)
 
   switch (signum)
     {
-    case SIGINT:
-      printf("...caught SIGINT at %s", ctime(&now));
-      break;
 
     case SIGUSR1:
-      printf("...caught SIGUSR1 at %s, ignoring...\n",ctime(&now));
+      printf("...caught SIGUSR1 at %s, triggering checkpoint write...\n",ctime(&now));
       break;
 
+    // this shouldnt be possible to trigger... but just in case.
     default:
       printf("...caught other unknown signal: %d at %s", signum, ctime(&now));
       printf("   see \"man 7 signal\" for a list of known signals\n");
-      break;
+      printf(" --> Restoring default handler for signal %d\n", signum);
+      signal(signum, SIG_DFL);
+      return;
     }
 
   // re-register default signal handler for action
 #ifndef HAVE_MPI
+  // dummy variables
   int x = 0;
   int y = 0;
   MPI_Barrier(MPI_COMM_WORLD);
   MPI_Allreduce(&x,&y,1, MPI_INT, MPI_MAX, MPI_COMM_WORLD);
-  printf(" --> Restoring default handler for signal %d\n", signum);
-  signal(signum, SIG_DFL);
 #endif
   Moose::autosave_flag = true;
   return;
 }
 
 void register_sig_handler()
 {
-  printf("Registering user-specified signal handlers for PID %d\n", getpid());
-
-  signal(SIGINT,  my_sig_handler);
-  signal(SIGTERM, my_sig_handler);
+  printf("Registering signal handlers for PID %d\n", getpid());
   signal(SIGUSR1, my_sig_handler);
 }
 

test/tests/misc/signal_handler/tests

@@ -1,12 +1,16 @@
 [Tests]
+	issues = '#12722'
 	[test_signal]
 		type = SignalTester
 		input = 'simple_transient_diffusion.i'
+		requirement = 'The app should write out a checkpoint file at any time by sending a signal to it.'
+
 	[]
 	[test_signal_recover]
 		type = RunApp
 		input = 'simple_transient_diffusion.i'
 		cli_args = '--recover'
 		prereq = 'test_signal'
+		requirement = 'The app should be able to recover from the autosaved checkpoint created by a signal.'
 	[]
 []