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/* checkfg.c: checks if the current process is in the foreground */
/* (C) 2011 magicant */
/* 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, see <http://www.gnu.org/licenses/>. */
#define _POSIX_C_SOURCE 200112L
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
int main(void)
{
int ttyfd = open("/dev/tty", O_RDWR | O_NOCTTY | O_NONBLOCK);
if (ttyfd < 0)
return EXIT_FAILURE;
pid_t tpgid = tcgetpgrp(ttyfd);
if (tpgid < 0)
return EXIT_FAILURE;
pid_t pgid = getpgrp();
return tpgid == pgid ? EXIT_SUCCESS : EXIT_FAILURE;
}
/* vim: set ts=8 sts=4 sw=4 et tw=80: */
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