mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-30 11:07:56 +00:00
50b076f4dd
* sysdeps/mach/hurd/wait4.c (__wait4): When proc_wait returns EAGAIN, return zero to indicate no children died yet (assuming WNOHANG). * sysdeps/mach/hurd/setsid.c: #include <hurd/fd.h>. 1999-09-17 Roland McGrath <roland@baalperazim.frob.com> * hurd/port2fd.c (_hurd_port2fd): Never change CTTYID port. * sysdeps/mach/hurd/setsid.c (__setsid): Fix return type -> pid_t. Return _hurd_pgrp instead of 0.
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/* Copyright (C) 1993,94,95,97,99 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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 <hurd.h>
|
|
#include <hurd/port.h>
|
|
#include <hurd/fd.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. */
|
|
pid_t
|
|
__setsid (void)
|
|
{
|
|
error_t err;
|
|
unsigned int stamp;
|
|
|
|
HURD_CRITICAL_BEGIN;
|
|
__mutex_lock (&_hurd_dtable_lock);
|
|
|
|
stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */
|
|
|
|
/* Tell the proc server we want to start a new session. */
|
|
err = __USEPORT (PROC, __proc_setsid (port));
|
|
if (!err)
|
|
/* Punt our current ctty. We hold the dtable lock from before the
|
|
proc_setsid call through clearing the cttyid port so that we can be
|
|
sure that it's been cleared by the time the signal thread attempts
|
|
to re-ctty the dtable in response to the pgrp change notification. */
|
|
_hurd_port_set (&_hurd_ports[INIT_PORT_CTTYID], MACH_PORT_NULL);
|
|
|
|
__mutex_unlock (&_hurd_dtable_lock);
|
|
|
|
if (!err)
|
|
/* Synchronize with the signal thread to make sure we have
|
|
received and processed proc_newids before returning to the user.
|
|
This both updates _hurd_pgrp, and
|
|
*/
|
|
while (_hurd_pids_changed_stamp == stamp)
|
|
{
|
|
#ifdef noteven
|
|
/* XXX we have no need for a mutex, but cthreads demands one. */
|
|
__condition_wait (&_hurd_pids_changed_sync, NULL);
|
|
#else
|
|
__swtch_pri (0);
|
|
#endif
|
|
}
|
|
|
|
HURD_CRITICAL_END;
|
|
|
|
return err ? __hurd_fail (err) : _hurd_pgrp;
|
|
}
|
|
|
|
weak_alias (__setsid, setsid)
|