kc3-lang/gnulib/tests/test-unlink.h

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• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• tests/test-unlink.h

• /* Tests of unlink.
     Copyright (C) 2009-2025 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
  
  /* This file is designed to test both unlink(n) and
     unlinkat(AT_FDCWD,n,0).  FUNC is the function to test.  Assumes
     that BASE and ASSERT are already defined, and that appropriate
     headers are already included.  If PRINT, then warn before returning
     status 77 when symlinks are unsupported.  */
  
  static int
  test_unlink_func (int (*func) (char const *name), bool print)
  {
    /* Setup.  */
    ASSERT (mkdir (BASE "dir", 0700) == 0);
    ASSERT (close (creat (BASE "dir/file", 0600)) == 0);
  
    /* Basic error conditions.  */
    errno = 0;
    ASSERT (func ("") == -1);
    ASSERT (errno == ENOENT);
    errno = 0;
    ASSERT (func (BASE "nosuch") == -1);
    ASSERT (errno == ENOENT);
    errno = 0;
    ASSERT (func (BASE "nosuch/") == -1);
    ASSERT (errno == ENOENT);
    /* Resulting errno after directories is rather varied across
       implementations (EPERM, EINVAL, EACCES, EBUSY, EISDIR, ENOTSUP);
       however, we must be careful to not attempt unlink on a directory
       unless we know it must fail.  */
    if (cannot_unlink_dir ())
      {
        ASSERT (func (".") == -1);
        ASSERT (func ("..") == -1);
        ASSERT (func ("/") == -1);
        ASSERT (func (BASE "dir") == -1);
        ASSERT (mkdir (BASE "dir1", 0700) == 0);
        ASSERT (func (BASE "dir1") == -1);
        ASSERT (rmdir (BASE "dir1") == 0);
      }
    errno = 0;
    ASSERT (func (BASE "dir/file/") == -1);
    ASSERT (errno == ENOTDIR);
  
    /* Test symlink behavior.  Specifying trailing slash will attempt
       unlink of a directory, so only attempt it if we know it must
       fail.  */
    if (symlink (BASE "dir", BASE "link") != 0)
      {
        ASSERT (func (BASE "dir/file") == 0);
        ASSERT (rmdir (BASE "dir") == 0);
        if (print)
          fputs ("skipping test: symlinks not supported on this file system\n",
                 stderr);
        return 77;
      }
    if (cannot_unlink_dir ())
      ASSERT (func (BASE "link/") == -1);
    ASSERT (func (BASE "link") == 0);
    ASSERT (symlink (BASE "dir/file", BASE "link") == 0);
    errno = 0;
    ASSERT (func (BASE "link/") == -1);
    ASSERT (errno == ENOTDIR);
    /* Order here proves unlink of a symlink does not follow through to
       the file.  */
    ASSERT (func (BASE "link") == 0);
    ASSERT (func (BASE "dir/file") == 0);
    ASSERT (rmdir (BASE "dir") == 0);
  
    return 0;
  }
  

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