login/getutline_r.c

   1 /* Copyright (C) 1996-2018 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>
   4    and Paul Janzen <pcj@primenet.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <libc-lock.h>
  22 #include <utmp.h>
  23
  24 #include "utmp-private.h"
  25
  26
  27 /* We have to use the lock in getutent_r.c.  */
  28 __libc_lock_define (extern, __libc_utmp_lock attribute_hidden)
  29
  30
  31 int
  32 __getutline_r (const struct utmp *line, struct utmp *buffer,
  33                struct utmp **result)
  34 {
  35   int retval;
  36
  37   __libc_lock_lock (__libc_utmp_lock);
  38
  39   retval = (*__libc_utmp_jump_table->getutline_r) (line, buffer, result);
  40
  41   __libc_lock_unlock (__libc_utmp_lock);
  42
  43   return retval;
  44 }
  45 libc_hidden_def (__getutline_r)
  46 weak_alias (__getutline_r, getutline_r)