1  /* BZ #22679 getcwd(3) should not succeed without returning an absolute path.
       2  
       3     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <errno.h>
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include <support/check.h>
      24  #include <support/namespace.h>
      25  #include <support/support.h>
      26  #include <support/temp_file.h>
      27  #include <support/test-driver.h>
      28  #include <support/xunistd.h>
      29  #include <unistd.h>
      30  
      31  static char *chroot_dir;
      32  
      33  /* The actual test.  Run it in a subprocess, so that the test harness
      34     can remove the temporary directory in --direct mode.  */
      35  static void
      36  getcwd_callback (void *closure)
      37  {
      38    xchroot (chroot_dir);
      39  
      40    errno = 0;
      41    char *cwd = getcwd (NULL, 0);
      42    TEST_COMPARE (errno, ENOENT);
      43    TEST_VERIFY (cwd == NULL);
      44  
      45    errno = 0;
      46    cwd = realpath (".", NULL);
      47    TEST_COMPARE (errno, ENOENT);
      48    TEST_VERIFY (cwd == NULL);
      49  
      50    _exit (0);
      51  }
      52  
      53  static int
      54  do_test (void)
      55  {
      56    support_become_root ();
      57    if (!support_can_chroot ())
      58      return EXIT_UNSUPPORTED;
      59  
      60    chroot_dir = support_create_temp_directory ("tst-getcwd-abspath-");
      61    support_isolate_in_subprocess (getcwd_callback, NULL);
      62  
      63    return 0;
      64  }
      65  
      66  #include <support/test-driver.c>