1  /* Tests of stat.
       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  /* This file is designed to test both stat(n,buf) and
      20     fstatat(AT_FDCWD,n,buf,0).  FUNC is the function to test.  Assumes
      21     that BASE and ASSERT are already defined, and that appropriate
      22     headers are already included.  If PRINT, warn before skipping
      23     symlink tests with status 77.  */
      24  
      25  static int
      26  test_stat_func (int (*func) (char const *, struct stat *), bool print)
      27  {
      28    struct stat st1;
      29    struct stat st2;
      30    char *cwd = getcwd (NULL, 0);
      31  
      32    ASSERT (cwd);
      33    ASSERT (func (".", &st1) == 0);
      34    ASSERT (func ("./", &st2) == 0);
      35  #if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
      36    ASSERT (SAME_INODE (st1, st2));
      37  #endif
      38    ASSERT (func (cwd, &st2) == 0);
      39  #if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
      40    ASSERT (SAME_INODE (st1, st2));
      41  #endif
      42    ASSERT (func ("/", &st1) == 0);
      43    ASSERT (func ("///", &st2) == 0);
      44  #if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
      45    ASSERT (SAME_INODE (st1, st2));
      46  #endif
      47  
      48    errno = 0;
      49    ASSERT (func ("", &st1) == -1);
      50    ASSERT (errno == ENOENT);
      51    errno = 0;
      52    ASSERT (func ("nosuch", &st1) == -1);
      53    ASSERT (errno == ENOENT);
      54    errno = 0;
      55    ASSERT (func ("nosuch/", &st1) == -1);
      56    ASSERT (errno == ENOENT);
      57  
      58    ASSERT (close (creat (BASE "file", 0600)) == 0);
      59    ASSERT (func (BASE "file", &st1) == 0);
      60    errno = 0;
      61    ASSERT (func (BASE "file/", &st1) == -1);
      62    ASSERT (errno == ENOTDIR);
      63  
      64    /* Now for some symlink tests, where supported.  We set up:
      65       link1 -> directory
      66       link2 -> file
      67       link3 -> dangling
      68       link4 -> loop
      69       then test behavior with trailing slash.
      70    */
      71    if (symlink (".", BASE "link1") != 0)
      72      {
      73        ASSERT (unlink (BASE "file") == 0);
      74        if (print)
      75          fputs ("skipping test: symlinks not supported on this file system\n",
      76                 stderr);
      77        return 77;
      78      }
      79    ASSERT (symlink (BASE "file", BASE "link2") == 0);
      80    ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
      81    ASSERT (symlink (BASE "link4", BASE "link4") == 0);
      82  
      83    ASSERT (func (BASE "link1/", &st1) == 0);
      84    ASSERT (S_ISDIR (st1.st_mode));
      85  
      86    errno = 0;
      87    ASSERT (func (BASE "link2/", &st1) == -1);
      88    ASSERT (errno == ENOTDIR);
      89  
      90    errno = 0;
      91    ASSERT (func (BASE "link3/", &st1) == -1);
      92    ASSERT (errno == ENOENT);
      93  
      94    errno = 0;
      95    ASSERT (func (BASE "link4/", &st1) == -1);
      96    ASSERT (errno == ELOOP);
      97  
      98    /* Cleanup.  */
      99    ASSERT (unlink (BASE "file") == 0);
     100    ASSERT (unlink (BASE "link1") == 0);
     101    ASSERT (unlink (BASE "link2") == 0);
     102    ASSERT (unlink (BASE "link3") == 0);
     103    ASSERT (unlink (BASE "link4") == 0);
     104    free (cwd);
     105  
     106    return 0;
     107  }