| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1991-2016 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 <hurd.h> |
| 19 | pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp; |
| 20 | int _hurd_orphaned; |
| 21 | |
| 22 | static void |
| 23 | init_pids (void) |
| 24 | { |
| 25 | __USEPORT (PROC, |
| 26 | ({ |
| 27 | __proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned); |
| 28 | __proc_getpgrp (port, _hurd_pid, &_hurd_pgrp); |
| 29 | })); |
| 30 | |
| 31 | (void) &init_pids; /* Avoid "defined but not used" warning. */ |
| 32 | } |
| 33 | |
| 34 | text_set_element (_hurd_proc_subinit, init_pids); |
| 35 | |
| 36 | #include <hurd/msg_server.h> |
| 37 | #include "set-hooks.h" |
| 38 | #include <cthreads.h> |
| 39 | |
| 40 | DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t)); |
| 41 | |
| 42 | /* These let user threads synchronize with an operation which changes ids. */ |
| 43 | unsigned int _hurd_pids_changed_stamp; |
| 44 | struct condition _hurd_pids_changed_sync; |
| 45 | |
| 46 | kern_return_t |
| 47 | _S_msg_proc_newids (mach_port_t me, |
| 48 | task_t task, |
| 49 | pid_t ppid, pid_t pgrp, int orphaned) |
| 50 | { |
| 51 | int pgrp_changed; |
| 52 | |
| 53 | if (task != __mach_task_self ()) |
| 54 | return EPERM; |
| 55 | |
| 56 | __mach_port_deallocate (__mach_task_self (), task); |
| 57 | |
| 58 | pgrp_changed = pgrp != _hurd_pgrp; |
| 59 | _hurd_ppid = ppid; |
| 60 | _hurd_pgrp = pgrp; |
| 61 | _hurd_orphaned = orphaned; |
| 62 | |
| 63 | if (pgrp_changed) |
| 64 | /* Run things that want notification of a pgrp change. */ |
| 65 | RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp)); |
| 66 | |
| 67 | /* Notify any waiting user threads that the id change as been completed. */ |
| 68 | ++_hurd_pids_changed_stamp; |
| 69 | |
| 70 | return 0; |
| 71 | } |