nss/tst-nss-test_errno.c

   1 /* getpwent failure when dlopen clobbers errno (bug 28953).
   2    Copyright (C) 2022-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <nss.h>
  20 #include <support/check.h>
  21 #include <stdlib.h>
  22 #include <errno.h>
  23 #include <stdbool.h>
  24 #include <pwd.h>
  25 #include <string.h>
  26
  27 static int
  28 do_test (void)
  29 {
  30   __nss_configure_lookup ("passwd", "files test_errno");
  31
  32   errno = 0;
  33   setpwent ();
  34   TEST_COMPARE (errno, 0);
  35
  36   bool root_seen = false;
  37   while (true)
  38     {
  39       errno = 0;
  40       struct passwd *e = getpwent ();
  41       if (e == NULL)
  42         break;
  43       if (strcmp (e->pw_name, "root"))
  44         root_seen = true;
  45     }
  46
  47   TEST_COMPARE (errno, 0);
  48   TEST_VERIFY (root_seen);
  49
  50   errno = 0;
  51   endpwent ();
  52   TEST_COMPARE (errno, 0);
  53
  54   TEST_COMPARE_STRING (getenv ("_nss_test_errno_setpwent"), "yes");
  55   TEST_COMPARE_STRING (getenv ("_nss_test_errno_getpwent_r"), "yes");
  56   TEST_COMPARE_STRING (getenv ("_nss_test_errno_endpwent"), "yes");
  57
  58   return 0;
  59 }
  60
  61 #include <support/test-driver.c>