Print usage information when shutdown is used by non-root user. Patch from Mike Frysinger and Gentoo.

doc/Changelog

@@ -12,6 +12,8 @@ sysvinit (2.88dsf) UNRELEASED; urgency=low
   * Change tty handling in init to make sure the UTF-8 flag is not cleared
     on boot.  Patch from Samuel Thibault.
   * Add Makefile in toplevel directory.
+  * Print usage information when shutdown is used by non-root user.
+    Patch from Mike Frysinger and Gentoo.
 
  -- Petter Reinholdtsen <pere@hungry.com>  Sun, 12 Jul 2009 19:58:10 +0200
 

src/shutdown.c

@@ -469,6 +469,7 @@ int main(int argc, char **argv)
 
 	if (getuid() != 0) {
   		fprintf(stderr, "shutdown: you must be root to do that!\n");
+		usage();
   		exit(1);
 	}
 	strcpy(down_level, "1");