posix/tst-getlogin.c

   1 /* Copyright (C) 1999-2014 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <unistd.h>
  19 #include <stdio.h>
  20 #include <string.h>
  21
  22 int
  23 main (void)
  24 {
  25   char *login;
  26   int errors = 0;
  27
  28   login = getlogin ();
  29   if (login == NULL)
  30     puts ("getlogin returned NULL, no further tests");
  31   else
  32     {
  33       char name[1024];
  34       int ret;
  35
  36       printf ("getlogin returned: `%s'\n", login);
  37
  38       ret = getlogin_r (name, sizeof (name));
  39       if (ret == 0)
  40         {
  41           printf ("getlogin_r returned: `%s'\n", name);
  42           if (strcmp (name, login) != 0)
  43             {
  44               puts ("Error: getlogin and getlogin_r returned different names");
  45               ++errors;
  46             }
  47         }
  48       else
  49         {
  50           printf ("Error: getlogin_r returned: %d (%s)\n",
  51                   ret, strerror (ret));
  52           ++errors;
  53         }
  54     }
  55
  56   return errors != 0;
  57 }