login/getutent_r.c

   1 /* Copyright (C) 1996-2020 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 weak_alias (__setutent, setutent)
  40
  41
  42 int
  43 __getutent_r (struct utmp *buffer, struct utmp **result)
  44 {
  45   int retval;
  46
  47   __libc_lock_lock (__libc_utmp_lock);
  48
  49   retval = __libc_getutent_r (buffer, result);
  50
  51   __libc_lock_unlock (__libc_utmp_lock);
  52
  53   return retval;
  54 }
  55 libc_hidden_def (__getutent_r)
  56 weak_alias (__getutent_r, getutent_r)
  57
  58
  59 struct utmp *
  60 __pututline (const struct utmp *data)
  61 {
  62   struct utmp *buffer;
  63
  64   __libc_lock_lock (__libc_utmp_lock);
  65
  66   buffer = __libc_pututline (data);
  67
  68   __libc_lock_unlock (__libc_utmp_lock);
  69
  70   return buffer;
  71 }
  72 libc_hidden_def (__pututline)
  73 weak_alias (__pututline, pututline)
  74
  75
  76 void
  77 __endutent (void)
  78 {
  79   __libc_lock_lock (__libc_utmp_lock);
  80
  81   __libc_endutent ();
  82
  83   __libc_lock_unlock (__libc_utmp_lock);
  84 }
  85 weak_alias (__endutent, endutent)