1: /* Copyright (C) 1991, 92, 93, 94, 95, 97 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, write to the Free
   16:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   17:    02111-1307 USA.  */
   18: 
   19: #include <hurd.h>
   20: pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
   21: int _hurd_orphaned;
   22: 
   23: static void
   24: init_pids (void)
   25: {
   26:   __USEPORT (PROC,
   27:              ({
   28:                __proc_getpids (port, &_hurd_pid, &_hurd_ppid, &_hurd_orphaned);
   29:                __proc_getpgrp (port, _hurd_pid, &_hurd_pgrp);
   30:              }));
   31: 
   32:   (void) &init_pids;            /* Avoid "defined but not used" warning.  */
   33: }
   34: 
   35: text_set_element (_hurd_proc_subinit, init_pids);
   36: ^L
   37: #include <hurd/msg_server.h>
   38: #include "set-hooks.h"
   39: #include <cthreads.h>
   40: 
   41: DEFINE_HOOK (_hurd_pgrp_changed_hook, (pid_t));
   42: 
   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;
   46: 
   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)
   51: {
   52:   int pgrp_changed;
   53: 
   54:   if (task != __mach_task_self ())
   55:     return EPERM;
   56: 
   57:   __mach_port_deallocate (__mach_task_self (), task);
   58: 
   59:   pgrp_changed = pgrp != _hurd_pgrp;
   60:   _hurd_ppid = ppid;
   61:   _hurd_pgrp = pgrp;
   62:   _hurd_orphaned = orphaned;
   63: 
   64:   if (pgrp_changed)
   65:     /* Run things that want notification of a pgrp change.  */
   66:     RUN_HOOK (_hurd_pgrp_changed_hook, (pgrp));
   67: 
   68:   /* Notify any waiting user threads that the id change as been completed.  */
   69:   ++_hurd_pids_changed_stamp;
   70: 
   71:   return 0;
   72: }