login/getutent_r.c

   1 /* Copyright (C) 1996-2021 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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <libc-lock.h>
  21 #include <stdlib.h>
  22 #include <utmp.h>
  23
  24 #include "utmp-private.h"
  25
  26 /* We need to protect the opening of the file.  */
  27 __libc_lock_define_initialized (, __libc_utmp_lock attribute_hidden)
  28
  29
  30 void
  31 __setutent (void)
  32 {
  33   __libc_lock_lock (__libc_utmp_lock);
  34
  35   __libc_setutent ();
  36
  37   __libc_lock_unlock (__libc_utmp_lock);
  38 }
  39 libc_hidden_def (__setutent)
  40 weak_alias (__setutent, setutent)
  41
  42
  43 int
  44 __getutent_r (struct utmp *buffer, struct utmp **result)
  45 {
  46   int retval;
  47
  48   __libc_lock_lock (__libc_utmp_lock);
  49
  50   retval = __libc_getutent_r (buffer, result);
  51
  52   __libc_lock_unlock (__libc_utmp_lock);
  53
  54   return retval;
  55 }
  56 libc_hidden_def (__getutent_r)
  57 weak_alias (__getutent_r, getutent_r)
  58
  59
  60 struct utmp *
  61 __pututline (const struct utmp *data)
  62 {
  63   struct utmp *buffer;
  64
  65   __libc_lock_lock (__libc_utmp_lock);
  66
  67   buffer = __libc_pututline (data);
  68
  69   __libc_lock_unlock (__libc_utmp_lock);
  70
  71   return buffer;
  72 }
  73 libc_hidden_def (__pututline)
  74 weak_alias (__pututline, pututline)
  75
  76
  77 void
  78 __endutent (void)
  79 {
  80   __libc_lock_lock (__libc_utmp_lock);
  81
  82   __libc_endutent ();
  83
  84   __libc_lock_unlock (__libc_utmp_lock);
  85 }
  86 libc_hidden_def (__endutent)
  87 weak_alias (__endutent, endutent)