tests/test-getlogin_r.c

   1 /* Test of getting user name.
   2    Copyright (C) 2010-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible and Paul Eggert.  */
  18
  19 #include <config.h>
  20
  21 #include <unistd.h>
  22
  23 #include "signature.h"
  24 #if !defined __sun /* On Solaris, the second parameter is of type 'int'.  */
  25 SIGNATURE_CHECK (getlogin_r, int, (char *, size_t));
  26 #endif
  27
  28 #include "test-getlogin.h"
  29
  30 int
  31 main (void)
  32 {
  33   /* Test value.  */
  34   /* Test with a large enough buffer.  */
  35   char buf[1024];
  36   int err = getlogin_r (buf, sizeof buf);
  37 #if defined __sun
  38   if (err == EINVAL)
  39     {
  40       /* This can happen on Solaris 11 OpenIndiana in the MATE desktop.  */
  41       fprintf (stderr, "Skipping test: no entry in /var/adm/utmpx.\n");
  42       exit (77);
  43     }
  44 #endif
  45   test_getlogin_result (buf, err);
  46
  47   /* Test with a small buffer.  */
  48   {
  49     char smallbuf[1024];
  50     size_t n = strlen (buf);
  51     size_t i;
  52
  53     for (i = 0; i <= n; i++)
  54       {
  55         err = getlogin_r (smallbuf, i);
  56         if (i == 0)
  57           ASSERT (err == ERANGE || err == EINVAL);
  58         else
  59           ASSERT (err == ERANGE);
  60       }
  61   }
  62
  63   /* Test with a huge buffer.  */
  64   {
  65     static char hugebuf[70000];
  66
  67     ASSERT (getlogin_r (hugebuf, sizeof (hugebuf)) == 0);
  68     ASSERT (strcmp (hugebuf, buf) == 0);
  69   }
  70
  71   return test_exit_status;
  72 }