1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* Copyright (C) 1991-2018 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 <hurd.h>
#include <lowlevellock.h>
pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
int _hurd_orphaned;
static void
init_pids (void)
{
__USEPORT (PROC,
({
__proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned);
__proc_getpgrp (port, _hurd_pid, &_hurd_pgrp);
}));
(void) &init_pids; /* Avoid "defined but not used" warning. */
}
text_set_element (_hurd_proc_subinit, init_pids);
#include <hurd/msg_server.h>
#include "set-hooks.h"
#include <cthreads.h>
DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
/* These let user threads synchronize with an operation which changes ids. */
unsigned int _hurd_pids_changed_stamp;
struct condition _hurd_pids_changed_sync;
kern_return_t
_S_msg_proc_newids (mach_port_t me,
task_t task,
pid_t ppid, pid_t pgrp, int orphaned)
{
int pgrp_changed;
if (task != __mach_task_self ())
return EPERM;
__mach_port_deallocate (__mach_task_self (), task);
pgrp_changed = pgrp != _hurd_pgrp;
_hurd_ppid = ppid;
_hurd_pgrp = pgrp;
_hurd_orphaned = orphaned;
if (pgrp_changed)
/* Run things that want notification of a pgrp change. */
RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp));
/* Notify any waiting user threads that the id change as been completed. */
++_hurd_pids_changed_stamp;
lll_wake (&_hurd_pids_changed_stamp, GSYNC_BROADCAST);
return 0;
}
|
