text: /* Copyright (C) 1993, 1994, 1995, 1997 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, write to the Free
     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     02111-1307 USA.  */
  
  #include <errno.h>
  #include <unistd.h>
  #include <hurd.h>
  #include <hurd/id.h>
  
  /* Get the effective user ID of the calling process.  */
  uid_t
  __geteuid ()
  {
    error_t err;
    uid_t euid;
  
    HURD_CRITICAL_BEGIN;
    __mutex_lock (&_hurd_id.lock);
  
    if (err = _hurd_check_ids ())
      {
        errno = err;
        euid = -1;
      }
    else if (_hurd_id.gen.nuids >= 1)
      euid = _hurd_id.gen.uids[0];
    else if (_hurd_id.aux.nuids >= 1)
      /* We have no effective uids.  Return the real uid.  */
      euid = _hurd_id.aux.uids[0];
    else
      {
        /* We do not even have a real uid.  */
        errno = EGRATUITOUS;
        euid = -1;
      }
  
    __mutex_unlock (&_hurd_id.lock);
    HURD_CRITICAL_END;
  
    return euid;
  }
  
  weak_alias (__geteuid, geteuid)
  