| xf.li | bfc6e71 | 2025-02-07 01:54:34 -0800 | [diff] [blame^] | 1 | /* Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <unistd.h> |
| 20 | #include <hurd.h> |
| 21 | #include <hurd/port.h> |
| 22 | |
| 23 | /* Set the process group ID of the process matching PID to PGID. |
| 24 | If PID is zero, the current process's process group ID is set. |
| 25 | If PGID is zero, the process ID of the process is used. */ |
| 26 | int |
| 27 | __setpgid (pid_t pid, pid_t pgid) |
| 28 | { |
| 29 | error_t err; |
| 30 | unsigned int stamp; |
| 31 | |
| 32 | stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */ |
| 33 | |
| 34 | if (err = __USEPORT (PROC, __proc_setpgrp (port, pid, pgid))) |
| 35 | return __hurd_fail (err); |
| 36 | |
| 37 | if (pid == 0 || pid == _hurd_pid) |
| 38 | /* Synchronize with the signal thread to make sure we have |
| 39 | received and processed proc_newids before returning to the user. */ |
| 40 | while (_hurd_pids_changed_stamp == stamp) |
| 41 | { |
| 42 | #ifdef noteven |
| 43 | /* XXX we have no need for a mutex, but cthreads demands one. */ |
| 44 | __condition_wait (&_hurd_pids_changed_sync, NULL); |
| 45 | #else |
| 46 | __swtch_pri(0); |
| 47 | #endif |
| 48 | } |
| 49 | |
| 50 | return 0; |
| 51 | |
| 52 | } |
| 53 | libc_hidden_def (__setpgid) |
| 54 | weak_alias (__setpgid, setpgid) |