/*
Main routine 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 <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include "pam_auth.h"
#include "vlock.h"
#include "nls.h"
#include "version.h"
#include "kbd_error.h"
int main(int ac, char *const av[])
{
int rc;
const char dev_prefix[] = "/dev/";
const char *username, *tty;
pam_handle_t *pamh;
set_progname(av[0]);
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE_NAME, LOCALEDIR);
textdomain(PACKAGE_NAME);
/* 1st, parse command line arguments. */
parse(ac, av);
/* 2nd, find out tty name... */
tty = ttyname(STDIN_FILENO);
if (!tty)
/* stdin is not a tty, so no need to try. */
kbd_error(EXIT_FAILURE, 0, _("stdin is not a tty"));
/* ... and strip its /dev/ prefix. */
if (!strncmp(tty, dev_prefix, sizeof(dev_prefix) - 1))
tty += sizeof(dev_prefix) - 1;
/* 3rd, get username for PAM. */
username = get_username();
/* 4th, initialize system logger. */
openlog("vlock", LOG_PID, LOG_AUTH);
/* 5th, initialize PAM. */
if (!(pamh = init_pam(username, tty, 0)))
exit(EXIT_FAILURE);
/* 6th, initialize VT, tty and screen. */
if (!init_vt(tty)) {
pam_end(pamh, PAM_SUCCESS);
exit(EXIT_FAILURE);
}
/* 7th, Log the fact of console locking. */
syslog(LOG_NOTICE, "Locked %s on %s for %s by (uid=%u)",
locked_name(), tty, username, getuid());
rc = get_password(pamh, username, tty);
restore_vt();
return rc;
}