login/getutline.c

   1 /* Copyright (C) 1996-2022 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 <stdlib.h>
  19 #include <utmp.h>
  20
  21
  22 /* Local buffer to store the result.  */
  23 libc_freeres_ptr (static struct utmp *buffer);
  24
  25
  26 struct utmp *
  27 __getutline (const struct utmp *line)
  28 {
  29   struct utmp *result;
  30
  31   if (buffer == NULL)
  32     {
  33       buffer = (struct utmp *) malloc (sizeof (struct utmp));
  34       if (buffer == NULL)
  35         return NULL;
  36     }
  37   if (__getutline_r (line, buffer, &result) < 0)
  38     return NULL;
  39
  40   return result;
  41 }
  42 libc_hidden_def (__getutline)
  43 weak_alias (__getutline, getutline)