login/getutline_r.c

   1 /* Copyright (C) 1996-2023 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, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <libc-lock.h>
  20 #include <utmp.h>
  21
  22 #include "utmp-private.h"
  23
  24
  25 /* We have to use the lock in getutent_r.c.  */
  26 __libc_lock_define (extern, __libc_utmp_lock attribute_hidden)
  27
  28
  29 int
  30 __getutline_r (const struct utmp *line, struct utmp *buffer,
  31                struct utmp **result)
  32 {
  33   int retval;
  34
  35   __libc_lock_lock (__libc_utmp_lock);
  36
  37   retval = __libc_getutline_r (line, buffer, result);
  38
  39   __libc_lock_unlock (__libc_utmp_lock);
  40
  41   return retval;
  42 }
  43 libc_hidden_def (__getutline_r)
  44 weak_alias (__getutline_r, getutline_r)