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/***************************************************************** -*- C -*- **
*
* console.c
* xrootconsole
* Copyright (C) 1998 Eric Youngblut
*
* 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
*
* The author of this software can be reached by e-mail at
* yngblut@cs.washington.edu. The latest version of this software can be
* found at http://www.cs.washington.edu/homes/yngblut/
*/
#include <fcntl.h>
#include <pty.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
int open_console()
{
int pty, tty, on = 1;
/* Allocate a pseudo-terminal. */
if (openpty(&pty, &tty, NULL, NULL, NULL) == -1)
{
perror("openpty");
exit(EXIT_FAILURE);
}
/* Drop privileges. */
if (seteuid(getuid()) == -1)
{
perror("seteuid");
exit(EXIT_FAILURE);
}
/* Linux specific? */
if (ioctl(tty, TIOCCONS, &on) == -1)
{
perror("ioctl");
exit(EXIT_FAILURE);
}
/* Make it non-blocking. */
if (fcntl(pty, F_SETFL, O_NONBLOCK) == -1)
{
perror("fcntl");
exit(EXIT_FAILURE);
}
return pty;
}
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