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/**
* cerberus – Minimal login program
*
* Copyright © 2013 Mattias Andrée (maandree@member.fsf.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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <unistd.h>
#include <sys/stat.h>
#include <stdio.h>
#include <termios.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <stropts.h>
#include <linux/vt.h>
#ifndef TTY_PERM
#define TTY_PERM 0600
#endif
#ifndef FAILURE_SLEEP
#define FAILURE_SLEEP 5
#endif
/**
* Secure the TTY from spying
*
* @param group The group, -1 for unchanged
*/
void secure_tty(gid_t group);
/**
* Set ownership and mode of the TTY
*
* @param owner The owner, -1 for unchanged
* @param group The group, -1 for unchanged
* @param with_fail Abort on failure
*/
void chown_tty(uid_t owner, gid_t group, int with_fail);
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