| /* Tests of areadlink and friends. |
| Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Eric Blake <ebb9@byu.net>, 2009. */ |
| |
| /* This file is designed to test areadlink(a), |
| areadlink_with_size(a,b), and areadlinkat(AT_FDCWD,a). FUNC is the |
| function to test; a length is always supplied, but may be ignored. |
| Assumes that BASE and ASSERT are already defined, and that |
| appropriate headers are already included. If PRINT, warn before |
| skipping symlink tests with status 77. */ |
| |
| static int |
| test_areadlink (char * (*func) (char const *, size_t), bool print) |
| { |
| /* Sanity checks of failures. Mingw lacks symlink, but areadlink can |
| still distinguish between various errors. */ |
| errno = 0; |
| ASSERT (func ("no_such", 1) == NULL); |
| ASSERT (errno == ENOENT); |
| errno = 0; |
| ASSERT (func ("no_such/", 1) == NULL); |
| ASSERT (errno == ENOENT); |
| errno = 0; |
| ASSERT (func ("", 1) == NULL); |
| ASSERT (errno == ENOENT || errno == EINVAL); |
| errno = 0; |
| ASSERT (func (".", 1) == NULL); |
| ASSERT (errno == EINVAL); |
| errno = 0; |
| ASSERT (func ("./", 1) == NULL); |
| ASSERT (errno == EINVAL); |
| ASSERT (close (creat (BASE "file", 0600)) == 0); |
| errno = 0; |
| ASSERT (func (BASE "file", 1) == NULL); |
| ASSERT (errno == EINVAL); |
| errno = 0; |
| ASSERT (func (BASE "file/", 1) == NULL); |
| ASSERT (errno == ENOTDIR || errno == EINVAL); /* AIX yields EINVAL */ |
| ASSERT (unlink (BASE "file") == 0); |
| |
| /* Now test actual symlinks. */ |
| if (symlink (BASE "dir", BASE "link")) |
| { |
| if (print) |
| fputs ("skipping test: symlinks not supported on this file system\n", |
| stderr); |
| return 77; |
| } |
| ASSERT (mkdir (BASE "dir", 0700) == 0); |
| errno = 0; |
| ASSERT (func (BASE "link/", 1) == NULL); |
| ASSERT (errno == EINVAL); |
| { |
| /* Too small a guess is okay. */ |
| char *buf = func (BASE "link", 1); |
| ASSERT (buf); |
| ASSERT (strcmp (buf, BASE "dir") == 0); |
| free (buf); |
| /* Too large a guess is okay. */ |
| buf = func (BASE "link", 10000000); |
| ASSERT (buf); |
| ASSERT (strcmp (buf, BASE "dir") == 0); |
| free (buf); |
| } |
| ASSERT (rmdir (BASE "dir") == 0); |
| ASSERT (unlink (BASE "link") == 0); |
| |
| return 0; |
| } |