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[glibc.git] / hurd / hurdpid.c
blob418b9164e5d8222ef1cdea5f4fda2b89743f2ecc
1 /* Copyright (C) 1991, 92, 93, 94, 95, 97 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <hurd.h>
20 pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
21 int _hurd_orphaned;
23 static void
24 init_pids (void)
26 __USEPORT (PROC,
28 __proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned);
29 __proc_getpgrp (port, _hurd_pid, &_hurd_pgrp);
30 }));
32 (void) &init_pids; /* Avoid "defined but not used" warning. */
35 text_set_element (_hurd_proc_subinit, init_pids);
37 #include <hurd/msg_server.h>
38 #include "set-hooks.h"
39 #include <cthreads.h>
41 DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
43 /* These let user threads synchronize with an operation which changes ids. */
44 unsigned int _hurd_pids_changed_stamp;
45 struct condition _hurd_pids_changed_sync;
47 kern_return_t
48 _S_msg_proc_newids (mach_port_t me,
49 task_t task,
50 pid_t ppid, pid_t pgrp, int orphaned)
52 int pgrp_changed;
54 if (task != __mach_task_self ())
55 return EPERM;
57 __mach_port_deallocate (__mach_task_self (), task);
59 pgrp_changed = pgrp != _hurd_pgrp;
60 _hurd_ppid = ppid;
61 _hurd_pgrp = pgrp;
62 _hurd_orphaned = orphaned;
64 if (pgrp_changed)
65 /* Run things that want notification of a pgrp change. */
66 RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp));
68 /* Notify any waiting user threads that the id change as been completed. */
69 ++_hurd_pids_changed_stamp;
71 return 0;