hydra: check error for empty command line

Check empty command line and fail early rather than resulting in mysterious seg faults.
pmodels · May 13, 2023 · 548c671 · 548c671
1 parent 0f72280
commit 548c671
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/pm/hydra/mpiexec/mpiexec.c b/src/pm/hydra/mpiexec/mpiexec.c
@@ -44,6 +44,10 @@ int main(int argc, char **argv)
 
     PMISERV_pg_init();
 
+    if (argc == 1) {
+        HYDU_ERR_SETANDJUMP(status, HYD_INVALID_PARAM, "command line empty. Try -h for usages.\n");
+    }
+
     /* Get user preferences */
     status = HYD_uii_mpx_get_parameters(argv);
     HYDU_ERR_POP(status, "error parsing parameters\n");