cat: Give a better error if the user specified no drives on command line.
authorRichard W.M. Jones <rjones@redhat.com>
Fri, 19 Nov 2010 13:05:49 +0000 (13:05 +0000)
committerRichard W.M. Jones <rjones@redhat.com>
Fri, 19 Nov 2010 13:06:22 +0000 (13:06 +0000)
cat/virt-cat.c

index 58ebd8e..3510a94 100644 (file)
@@ -220,6 +220,10 @@ main (int argc, char *argv[])
   if (optind >= argc || argc - optind < 1)
     usage (EXIT_FAILURE);
 
+  /* User must have specified some drives. */
+  if (drvs == NULL)
+    usage (EXIT_FAILURE);
+
   /* Add drives, inspect and mount.  Note that inspector is always true,
    * and there is no -m option.
    */