Include <getopt.h>.

(main): Reject unknown options.

1 files changed, 5 insertions, 10 deletions

diff --git a/src/hostid.c b/src/hostid.c
index 1ca34bb89..8bb76abf1 100644
--- a/src/hostid.c
+++ b/src/hostid.c
@@ -20,6 +20,7 @@
 /* Written by Jim Meyering.  */
 
 #include <config.h>
+#include <getopt.h>
 #include <stdio.h>
 #include <sys/types.h>
 
@@ -73,18 +74,12 @@ main (int argc, char **argv)
 
   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
 		      usage, AUTHORS, (char const *) NULL);
+  if (getopt (argc, argv, "") != -1)
+    usage (EXIT_FAILURE);
 
-  /* The above handles --help and --version.
-     Since there is no other invocation of getopt, handle `--' here.  */
-  if (1 < argc && STREQ (argv[1], "--"))
+  if (optind < argc)
     {
-      --argc;
-      ++argv;
-    }
-
-  if (argc > 1)
-    {
-      error (0, 0, _("extra operand %s"), quote (argv[1]));
+      error (0, 0, _("extra operand %s"), quote (argv[optind]));
       usage (EXIT_FAILURE);
     }