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init/initd/setup_tty.c
David Oberhollenzer 1b3b98135e Add license headers and comments to source
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
2018-03-24 22:50:28 +01:00

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C

/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* Copyright (C) 2018 - David Oberhollenzer
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include "init.h"
int setup_tty(void)
{
int fd;
fd = open("/dev/console", O_WRONLY | O_NOCTTY);
if (fd < 0) {
perror("/dev/console");
return -1;
}
close(STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
close(fd);
return 0;
}