1  /* Tests of fstatat.
       2     Copyright (C) 2009-2022 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 <stdbool.h>
      29  #include <stdio.h>
      30  #include <stdlib.h>
      31  #include <unistd.h>
      32  
      33  #include "openat.h"
      34  #include "same-inode.h"
      35  #include "ignore-value.h"
      36  #include "macros.h"
      37  
      38  #ifndef BASE
      39  # define BASE "test-fstatat.t"
      40  #endif
      41  
      42  #include "test-lstat.h"
      43  #include "test-stat.h"
      44  
      45  static int dfd = AT_FDCWD;
      46  
      47  /* Wrapper around fstatat to test stat behavior.  */
      48  static int
      49  do_stat (char const *name, struct stat *st)
      50  {
      51  #ifdef TEST_STATAT
      52    return statat (dfd, name, st);
      53  #else
      54    return fstatat (dfd, name, st, 0);
      55  #endif
      56  }
      57  
      58  /* Wrapper around fstatat to test lstat behavior.  */
      59  static int
      60  do_lstat (char const *name, struct stat *st)
      61  {
      62  #ifdef TEST_STATAT
      63    return lstatat (dfd, name, st);
      64  #else
      65    return fstatat (dfd, name, st, AT_SYMLINK_NOFOLLOW);
      66  #endif
      67  }
      68  
      69  int
      70  main (_GL_UNUSED int argc, char *argv[])
      71  {
      72    int result;
      73  
      74    /* Remove any leftovers from a previous partial run.  */
      75    ignore_value (system ("rm -rf " BASE "*"));
      76  
      77    /* Test behaviour for invalid file descriptors.  */
      78    {
      79      struct stat statbuf;
      80  
      81      errno = 0;
      82      ASSERT (fstatat (-1, "foo", &statbuf, 0) == -1);
      83      ASSERT (errno == EBADF);
      84    }
      85    {
      86      struct stat statbuf;
      87  
      88      close (99);
      89      errno = 0;
      90      ASSERT (fstatat (99, "foo", &statbuf, 0) == -1);
      91      ASSERT (errno == EBADF);
      92    }
      93  
      94    result = test_stat_func (do_stat, false);
      95    ASSERT (test_lstat_func (do_lstat, false) == result);
      96    dfd = open (".", O_RDONLY);
      97    ASSERT (0 <= dfd);
      98    ASSERT (test_stat_func (do_stat, false) == result);
      99    ASSERT (test_lstat_func (do_lstat, false) == result);
     100    ASSERT (close (dfd) == 0);
     101  
     102    /* FIXME - add additional tests of dfd not at current directory.  */
     103  
     104    if (result == 77)
     105      fputs ("skipping test: symlinks not supported on this file system\n",
     106             stderr);
     107    return result;
     108  }