| /* Copyright (C) 1993-2014 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <unistd.h> |
| #include <hurd.h> |
| #include <hurd/port.h> |
| |
| /* Set the process group ID of the process matching PID to PGID. |
| If PID is zero, the current process's process group ID is set. |
| If PGID is zero, the process ID of the process is used. */ |
| int |
| __setpgid (pid, pgid) |
| pid_t pid; |
| pid_t pgid; |
| { |
| error_t err; |
| unsigned int stamp; |
| |
| stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */ |
| |
| if (err = __USEPORT (PROC, __proc_setpgrp (port, pid, pgid))) |
| return __hurd_fail (err); |
| |
| if (pid == 0 || pid == _hurd_pid) |
| /* 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_pri(0); |
| #endif |
| } |
| |
| return 0; |
| |
| } |
| libc_hidden_def (__setpgid) |
| weak_alias (__setpgid, setpgid) |