Include getopt.h.

(main): Use getopt_long to handle --version and --help.

1 files changed, 31 insertions, 1 deletions

diff --git a/lib-src/b2m.c b/lib-src/b2m.c
index 2eb6a0354b8..6aea2270a51 100644
--- a/lib-src/b2m.c
+++ b/lib-src/b2m.c
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <sys/types.h>
+#include <getopt.h>
 #ifdef MSDOS
 #include <fcntl.h>
 #endif
@@ -78,6 +79,15 @@ void fatal ();
 
 char *progname;
 
+struct option longopts[] =
+{
+  { "help",			no_argument,	   NULL,     'h'   },
+  { "version",			no_argument,	   NULL,     'V'   },
+  { 0 }
+};
+
+extern int optind;
+
 main (argc, argv)
      int argc;
      char **argv;
@@ -101,11 +111,31 @@ main (argc, argv)
 #endif
   progname = argv[0];
 
-  if (argc != 1)
+  while (1)
+    {
+      int opt = getopt_long (argc, argv, "hV", longopts, 0);
+      if (opt == EOF)
+	break;
+
+      switch (opt)
+	{
+	case 'V':
+	  printf ("%s (GNU Emacs %s)\n", "b2m", VERSION);
+	  puts ("b2m is in the public domain.");
+	  exit (GOOD);
+
+	case 'h':
+	  fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname);
+	  exit (GOOD);
+	}
+    }
+
+  if (optind != argc)
     {
       fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname);
       exit (GOOD);
     }
+
   labels_saved = printing = header = FALSE;
   ltoday = time (0);
   today = ctime (&ltoday);