mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* Copyright (C) 1991, 1995, 1996, 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
|
|
/* Create a new session with the calling process as its leader.
|
|
The process group IDs of the session and the calling process
|
|
are set to the process ID of the calling process, which is returned. */
|
|
int
|
|
__setsid ()
|
|
{
|
|
pid_t pid = getpid ();
|
|
int tty;
|
|
int save = errno;
|
|
|
|
if (__getpgid (pid) == pid)
|
|
{
|
|
/* Already the leader. */
|
|
__set_errno (EPERM);
|
|
return -1;
|
|
}
|
|
|
|
if (setpgid (pid, pid) < 0)
|
|
return -1;
|
|
|
|
tty = open ("/dev/tty", 0);
|
|
if (tty < 0)
|
|
{
|
|
__set_errno (save);
|
|
return 0;
|
|
}
|
|
(void) __ioctl (tty, TIOCNOTTY, 0);
|
|
(void) __close (tty);
|
|
|
|
__set_errno (save);
|
|
return 0;
|
|
}
|
|
|
|
weak_alias (__setsid, setsid)
|