/*

  Parse command line options for vlock, the VT locking program for linux.

  Copyright (C) 1994-1998 Michael K. Johnson <johnsonm@redhat.com>

  Copyright (C) 2002, 2005 Dmitry V. Levin <ldv@altlinux.org>

  This program is free software; you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation; either version 2 of the License, or

  (at your option) any later version.

  This program is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with this program; if not, write to the Free Software

  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

*/

#include "config.h"

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include <getopt.h>

#include "vlock.h"

#include "nls.h"

#include "version.h"

/*

 * This determines whether the default behavior is to lock only the

 * current VT or all of them.

 * 0 means current, 1 means all.

 */

int o_lock_all;

const char *

locked_name(void)

{

	return o_lock_all ? "console" : (is_vt ? "VC" : "tty");

}

static void __attribute__((__noreturn__))

show_usage(void)

{

	fprintf(stderr,

	        _("Try `%s --help' for more information.\n"),

	        program_invocation_short_name);

	exit(1);

}

static void __attribute__((__noreturn__))

show_help(void)

{

	printf(_("%s: locks virtual consoles, saving your current session.\n"

	         "Usage: %s [options]\n"

	         "       Where [options] are any of:\n"

	         "-c or --current: lock only this virtual console, allowing user to\n"

	         "       switch to other virtual consoles.\n"

	         "-a or --all: lock all virtual consoles by preventing other users\n"

	         "       from switching virtual consoles.\n"

	         "-v or --version: Print the version number of vlock and exit.\n"

	         "-h or --help: Print this help message and exit.\n"),

	       progname, progname);

	exit(0);

}

void parse(int ac, char *const av[])

{

	static struct option long_options[] = {

		{ "current", 0, 0, 'c' },

		{ "all", 0, 0, 'a' },

		{ "version", 0, 0, 'v' },

		{ "help", 0, 0, 'h' },

		{ 0, 0, 0, 0 },

	};

	int c;

	while ((c = getopt_long(ac, av, "acvh", long_options, 0)) != -1) {

		switch (c) {

			case 'c':

				o_lock_all = 0;

				break;

			case 'a':

				o_lock_all = 1;

				break;

			case 'v':

				fprintf(stderr, "%s\n", VERSION);

				exit(EXIT_SUCCESS);

				break;

			case 'h':

				show_help();

				break;

			default:

				show_usage();

				break;

		}

	}

}