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- /* Copyright (C) 1993, 1994 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., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <hurd.h>
- #include <hurd/port.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
- DEFUN_VOID(__setsid)
- {
- error_t err;
- unsigned int stamp;
-
- stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */
-
- /* Tell the proc server we want to start a new session. */
- if (err = __USEPORT (PROC, __proc_setsid (port)))
- return __hurd_fail (err);
-
- /* Punt our current ctty. */
- _hurd_setcttyid (MACH_PORT_NULL);
-
- /* Synchronize with the signal thread to make sure we have
- received and processed proc_newids before returning to the user. */
- 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();
- #endif
- }
-
- return 0;
- }
-