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>