1/*
2 * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <config.h>
18
19#include <sys/types.h>
20#include <sys/param.h>
21#include <sys/ioctl.h>
22
23#include <fcntl.h>
24#ifdef HAVE_UNISTD_H
25# include <unistd.h>
26#endif /* HAVE_UNISTD_H */
27
28#include <pathnames.h>
29#include "missing.h"
30
31pid_t
32setsid()
33{
34    int fd;
35
36#ifdef SETPGRP_VOID
37    if (setpgrp() == -1)
38#else
39    if (setpgrp(0, 0) == -1)
40#endif
41	return -1;
42# ifdef TIOCNOTTY
43    if ((fd = open(_PATH_TTY, O_RDWR, 0644)) != -1) {
44        (void) ioctl(fd, TIOCNOTTY, NULL);
45        close(fd);
46    }
47# endif
48    return getpid();
49}
50