1  /* Tests of unlinkat.
       2     Copyright (C) 2009-2023 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 Eric Blake <ebb9@byu.net>, 2009.  */
      18  
      19  #include <config.h>
      20  
      21  #include <unistd.h>
      22  
      23  #include "signature.h"
      24  SIGNATURE_CHECK (unlinkat, int, (int, char const *, int));
      25  
      26  #include <fcntl.h>
      27  #include <errno.h>
      28  #include <stdio.h>
      29  #include <stdlib.h>
      30  #include <sys/stat.h>
      31  
      32  #include "unlinkdir.h"
      33  #include "ignore-value.h"
      34  #include "macros.h"
      35  
      36  #define BASE "test-unlinkat.t"
      37  
      38  #include "test-rmdir.h"
      39  #include "test-unlink.h"
      40  
      41  static int dfd = AT_FDCWD;
      42  
      43  /* Wrapper around unlinkat to test rmdir behavior.  */
      44  static int
      45  rmdirat (char const *name)
      46  {
      47    return unlinkat (dfd, name, AT_REMOVEDIR);
      48  }
      49  
      50  /* Wrapper around unlinkat to test unlink behavior.  */
      51  static int
      52  unlinker (char const *name)
      53  {
      54    return unlinkat (dfd, name, 0);
      55  }
      56  
      57  int
      58  main (_GL_UNUSED int argc, char *argv[])
      59  {
      60    /* FIXME: Add tests of fd other than ".".  */
      61    int result1;
      62    int result2;
      63  
      64    /* Remove any leftovers from a previous partial run.  */
      65    ignore_value (system ("rm -rf " BASE "*"));
      66  
      67    /* Test behaviour for invalid file descriptors.  */
      68    {
      69      errno = 0;
      70      ASSERT (unlinkat (-1, "foo", 0) == -1);
      71      ASSERT (errno == EBADF);
      72    }
      73    {
      74      close (99);
      75      errno = 0;
      76      ASSERT (unlinkat (99, "foo", 0) == -1);
      77      ASSERT (errno == EBADF);
      78    }
      79  
      80    result1 = test_rmdir_func (rmdirat, false);
      81    result2 = test_unlink_func (unlinker, false);
      82    ASSERT (result1 == result2);
      83    dfd = open (".", O_RDONLY);
      84    ASSERT (0 <= dfd);
      85    result2 = test_rmdir_func (rmdirat, false);
      86    ASSERT (result1 == result2);
      87    result2 = test_unlink_func (unlinker, false);
      88    ASSERT (result1 == result2);
      89    ASSERT (close (dfd) == 0);
      90    if (result1 == 77)
      91      fputs ("skipping test: symlinks not supported on this file system\n",
      92             stderr);
      93    return result1;
      94  }