login/getutid.c

   1 /* Copyright (C) 1996, 1997, 1998, 2001, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdlib.h>
  21 #include <utmp.h>
  22
  23
  24 /* Local buffer to store the result.  */
  25 libc_freeres_ptr (static struct utmp *buffer);
  26
  27 struct utmp *
  28 __getutid (const struct utmp *id)
  29 {
  30   struct utmp *result;
  31
  32   if (buffer == NULL)
  33     {
  34       buffer = (struct utmp *) malloc (sizeof (struct utmp));
  35       if (buffer == NULL)
  36         return NULL;
  37     }
  38   if (__getutid_r (id, buffer, &result) < 0)
  39     return NULL;
  40
  41   return result;
  42 }
  43 weak_alias (__getutid, getutid)