1  /* Tests of fstatat.
       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 <sys/stat.h>
      22  
      23  #include "signature.h"
      24  SIGNATURE_CHECK (fstatat, int, (int, char const *, struct stat *, int));
      25  
      26  #include <fcntl.h>
      27  #include <errno.h>
      28  #include <stdio.h>
      29  #include <stdlib.h>
      30  #include <unistd.h>
      31  
      32  #include "openat.h"
      33  #include "same-inode.h"
      34  #include "ignore-value.h"
      35  #include "macros.h"
      36  
      37  #ifndef BASE
      38  # define BASE "test-fstatat.t"
      39  #endif
      40  
      41  #include "test-lstat.h"
      42  #include "test-stat.h"
      43  
      44  static int dfd = AT_FDCWD;
      45  
      46  /* Wrapper around fstatat to test stat behavior.  */
      47  static int
      48  do_stat (char const *name, struct stat *st)
      49  {
      50  #ifdef TEST_STATAT
      51    return statat (dfd, name, st);
      52  #else
      53    return fstatat (dfd, name, st, 0);
      54  #endif
      55  }
      56  
      57  /* Wrapper around fstatat to test lstat behavior.  */
      58  static int
      59  do_lstat (char const *name, struct stat *st)
      60  {
      61  #ifdef TEST_STATAT
      62    return lstatat (dfd, name, st);
      63  #else
      64    return fstatat (dfd, name, st, AT_SYMLINK_NOFOLLOW);
      65  #endif
      66  }
      67  
      68  int
      69  main (_GL_UNUSED int argc, _GL_UNUSED char *argv[])
      70  {
      71    int result;
      72  
      73    /* Remove any leftovers from a previous partial run.  */
      74    ignore_value (system ("rm -rf " BASE "*"));
      75  
      76    /* Test behaviour for invalid file descriptors.  */
      77    {
      78      struct stat statbuf;
      79  
      80      errno = 0;
      81      ASSERT (fstatat (-1, "foo", &statbuf, 0) == -1);
      82      ASSERT (errno == EBADF);
      83    }
      84    {
      85      struct stat statbuf;
      86  
      87      close (99);
      88      errno = 0;
      89      ASSERT (fstatat (99, "foo", &statbuf, 0) == -1);
      90      ASSERT (errno == EBADF);
      91    }
      92  
      93    result = test_stat_func (do_stat, false);
      94    ASSERT (test_lstat_func (do_lstat, false) == result);
      95    dfd = open (".", O_RDONLY);
      96    ASSERT (0 <= dfd);
      97    ASSERT (test_stat_func (do_stat, false) == result);
      98    ASSERT (test_lstat_func (do_lstat, false) == result);
      99    ASSERT (close (dfd) == 0);
     100  
     101    /* FIXME - add additional tests of dfd not at current directory.  */
     102  
     103    if (result == 77)
     104      fputs ("skipping test: symlinks not supported on this file system\n",
     105             stderr);
     106    return result;
     107  }