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04277e02 | 1 | /* Copyright (C) 1991-2019 Free Software Foundation, Inc. |
c84142e8 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
c84142e8 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 8 | |
c84142e8 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 RM |
17 | |
18 | #include <hurd.h> | |
fb4cc8a0 AA |
19 | #include <lowlevellock.h> |
20 | ||
28f540f4 RM |
21 | pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp; |
22 | int _hurd_orphaned; | |
23 | ||
24 | static void | |
25 | init_pids (void) | |
26 | { | |
27 | __USEPORT (PROC, | |
28 | ({ | |
29 | __proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned); | |
30 | __proc_getpgrp (port, _hurd_pid, &_hurd_pgrp); | |
31 | })); | |
32 | ||
33 | (void) &init_pids; /* Avoid "defined but not used" warning. */ | |
34 | } | |
35 | ||
36 | text_set_element (_hurd_proc_subinit, init_pids); | |
37 | \f | |
38 | #include <hurd/msg_server.h> | |
39 | #include "set-hooks.h" | |
40 | #include <cthreads.h> | |
41 | ||
42 | DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t)); | |
43 | ||
44 | /* These let user threads synchronize with an operation which changes ids. */ | |
45 | unsigned int _hurd_pids_changed_stamp; | |
46 | struct condition _hurd_pids_changed_sync; | |
47 | ||
48 | kern_return_t | |
49 | _S_msg_proc_newids (mach_port_t me, | |
50 | task_t task, | |
51 | pid_t ppid, pid_t pgrp, int orphaned) | |
52 | { | |
f94a3574 RM |
53 | int pgrp_changed; |
54 | ||
28f540f4 RM |
55 | if (task != __mach_task_self ()) |
56 | return EPERM; | |
57 | ||
58 | __mach_port_deallocate (__mach_task_self (), task); | |
59 | ||
f94a3574 | 60 | pgrp_changed = pgrp != _hurd_pgrp; |
28f540f4 RM |
61 | _hurd_ppid = ppid; |
62 | _hurd_pgrp = pgrp; | |
63 | _hurd_orphaned = orphaned; | |
64 | ||
f94a3574 RM |
65 | if (pgrp_changed) |
66 | /* Run things that want notification of a pgrp change. */ | |
67 | RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp)); | |
28f540f4 RM |
68 | |
69 | /* Notify any waiting user threads that the id change as been completed. */ | |
70 | ++_hurd_pids_changed_stamp; | |
fb4cc8a0 | 71 | lll_wake (&_hurd_pids_changed_stamp, GSYNC_BROADCAST); |
28f540f4 RM |
72 | |
73 | return 0; | |
74 | } |