Line data    Source code

       1             : /* Tests of symlink.
       2             :    Copyright (C) 2009-2020 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 symlink(a,b) and
      20             :    symlinkat(a,AT_FDCWD,b).  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           1 : test_symlink (int (*func) (char const *, char const *), bool print)
      27             : {
      28           1 :   if (func ("nowhere", BASE "link1"))
      29             :     {
      30           0 :       if (print)
      31           0 :         fputs ("skipping test: symlinks not supported on this file system\n",
      32             :                stderr);
      33           0 :       return 77;
      34             :     }
      35             : 
      36             :   /* Some systems allow the creation of 0-length symlinks as a synonym
      37             :      for "."; but most reject it.  */
      38             :   {
      39             :     int status;
      40           1 :     errno = 0;
      41           1 :     status = func ("", BASE "link2");
      42           1 :     if (status == -1)
      43           1 :       ASSERT (errno == ENOENT || errno == EINVAL);
      44             :     else
      45             :       {
      46           0 :         ASSERT (status == 0);
      47           0 :         ASSERT (unlink (BASE "link2") == 0);
      48             :       }
      49             :   }
      50             : 
      51             :   /* Sanity checks of failures.  */
      52           1 :   errno = 0;
      53           1 :   ASSERT (func ("nowhere", "") == -1);
      54           1 :   ASSERT (errno == ENOENT);
      55           1 :   errno = 0;
      56           1 :   ASSERT (func ("nowhere", ".") == -1);
      57           1 :   ASSERT (errno == EEXIST || errno == EINVAL);
      58           1 :   errno = 0;
      59           1 :   ASSERT (func ("somewhere", BASE "link1") == -1);
      60           1 :   ASSERT (errno == EEXIST);
      61           1 :   errno = 0;
      62           1 :   ASSERT (func ("nowhere", BASE "link2/") == -1);
      63           1 :   ASSERT (errno == ENOTDIR || errno == ENOENT);
      64           1 :   ASSERT (mkdir (BASE "dir", 0700) == 0);
      65           1 :   errno = 0;
      66           1 :   ASSERT (func ("nowhere", BASE "dir") == -1);
      67           1 :   ASSERT (errno == EEXIST);
      68           1 :   errno = 0;
      69           1 :   ASSERT (func ("nowhere", BASE "dir/") == -1);
      70           1 :   ASSERT (errno == EEXIST || errno == EINVAL
      71             :           || errno == ENOENT /* Lustre FS on Linux */);
      72           1 :   ASSERT (close (creat (BASE "file", 0600)) == 0);
      73           1 :   errno = 0;
      74           1 :   ASSERT (func ("nowhere", BASE "file") == -1);
      75           1 :   ASSERT (errno == EEXIST);
      76           1 :   errno = 0;
      77           1 :   ASSERT (func ("nowhere", BASE "file/") == -1);
      78           1 :   ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
      79             : 
      80             :   /* Trailing slash must always be rejected.  */
      81           1 :   ASSERT (unlink (BASE "link1") == 0);
      82           1 :   ASSERT (func (BASE "link2", BASE "link1") == 0);
      83           1 :   errno = 0;
      84           1 :   ASSERT (func (BASE "nowhere", BASE "link1/") == -1);
      85           1 :   ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
      86           1 :   errno = 0;
      87           1 :   ASSERT (unlink (BASE "link2") == -1);
      88           1 :   ASSERT (errno == ENOENT);
      89             : 
      90             :   /* Cleanup.  */
      91           1 :   ASSERT (rmdir (BASE "dir") == 0);
      92           1 :   ASSERT (unlink (BASE "file") == 0);
      93           1 :   ASSERT (unlink (BASE "link1") == 0);
      94             : 
      95           1 :   return 0;
      96             : }