posix/tst-getlogin.c

   1 /* Copyright (C) 1999 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <unistd.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22
  23 int
  24 main (void)
  25 {
  26   char *login;
  27   int errors = 0;
  28
  29   login = getlogin ();
  30   if (login == NULL)
  31     puts ("getlogin returned NULL, no further tests");
  32   else
  33     {
  34       char name[1024];
  35       int ret;
  36
  37       printf ("getlogin returned: `%s'\n", login);
  38
  39       ret = getlogin_r (name, sizeof (name));
  40       if (ret == 0)
  41         {
  42           printf ("getlogin_r returned: `%s'\n", name);
  43           if (strcmp (name, login) != 0)
  44             {
  45               puts ("Error: getlogin and getlogin_r returned different names");
  46               ++errors;
  47             }
  48         }
  49       else
  50         {
  51           printf ("Error: getlogin_r returned: %d (%s)\n",
  52                   ret, strerror (ret));
  53           ++errors;
  54         }
  55     }
  56
  57   return errors != 0;
  58 }