[thin_rmap] Fail if no regions are supplied.

jthornber · Sep 19, 2017 · 3790f2e · 3790f2e
1 parent f7d7933
commit 3790f2e
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/thin-provisioning/thin_rmap.cc b/thin-provisioning/thin_rmap.cc
@@ -180,6 +180,12 @@ thin_rmap_cmd::run(int argc, char **argv)
 		exit(1);
 	}
 
+	if (!regions.size()) {
+		cerr << "No regions provided." << endl;
+		usage(cerr);
+		exit(1);
+	}
+
 	return rmap(argv[optind], regions);
 }