Back to index

glibc  2.9
group_member.c
Go to the documentation of this file.
00001 /* `group_member' -- test if process is in a given group.  Hurd version.
00002    Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <errno.h>
00021 #include <unistd.h>
00022 #include <hurd.h>
00023 #include <hurd/id.h>
00024 
00025 int
00026 __group_member (gid)
00027      gid_t gid;
00028 {
00029   int member = 0;
00030   error_t err;
00031   void *crit;
00032 
00033   crit = _hurd_critical_section_lock ();
00034   __mutex_lock (&_hurd_id.lock);
00035 
00036   err = _hurd_check_ids ();
00037   if (! err)
00038     {
00039       size_t i;
00040       for (i = 0; i < _hurd_id.gen.ngids; ++i)
00041        if (_hurd_id.gen.gids[i] == gid)
00042          {
00043            member = 1;
00044            break;
00045          }
00046     }
00047 
00048   __mutex_unlock (&_hurd_id.lock);
00049   _hurd_critical_section_unlock (crit);
00050 
00051   if (err)
00052     __hurd_fail (err);
00053   return member;
00054 }
00055 
00056 weak_alias (__group_member, group_member)