| /* Tests of unlink. |
| 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 both unlink(n) and |
| unlinkat(AT_FDCWD,n,0). FUNC is the function to test. Assumes |
| that BASE and ASSERT are already defined, and that appropriate |
| headers are already included. If PRINT, then warn before returning |
| status 77 when symlinks are unsupported. */ |
| |
| static int |
| test_unlink_func (int (*func) (char const *name), bool print) |
| { |
| /* Setup. */ |
| ASSERT (mkdir (BASE "dir", 0700) == 0); |
| ASSERT (close (creat (BASE "dir/file", 0600)) == 0); |
| |
| /* Basic error conditions. */ |
| errno = 0; |
| ASSERT (func ("") == -1); |
| ASSERT (errno == ENOENT); |
| errno = 0; |
| ASSERT (func (BASE "nosuch") == -1); |
| ASSERT (errno == ENOENT); |
| errno = 0; |
| ASSERT (func (BASE "nosuch/") == -1); |
| ASSERT (errno == ENOENT); |
| /* Resulting errno after directories is rather varied across |
| implementations (EPERM, EINVAL, EACCES, EBUSY, EISDIR, ENOTSUP); |
| however, we must be careful to not attempt unlink on a directory |
| unless we know it must fail. */ |
| if (cannot_unlink_dir ()) |
| { |
| ASSERT (func (".") == -1); |
| ASSERT (func ("..") == -1); |
| ASSERT (func ("/") == -1); |
| ASSERT (func (BASE "dir") == -1); |
| ASSERT (mkdir (BASE "dir1", 0700) == 0); |
| ASSERT (func (BASE "dir1") == -1); |
| ASSERT (rmdir (BASE "dir1") == 0); |
| } |
| errno = 0; |
| ASSERT (func (BASE "dir/file/") == -1); |
| ASSERT (errno == ENOTDIR); |
| |
| /* Test symlink behavior. Specifying trailing slash will attempt |
| unlink of a directory, so only attempt it if we know it must |
| fail. */ |
| if (symlink (BASE "dir", BASE "link") != 0) |
| { |
| ASSERT (func (BASE "dir/file") == 0); |
| ASSERT (rmdir (BASE "dir") == 0); |
| if (print) |
| fputs ("skipping test: symlinks not supported on this file system\n", |
| stderr); |
| return 77; |
| } |
| if (cannot_unlink_dir ()) |
| ASSERT (func (BASE "link/") == -1); |
| ASSERT (func (BASE "link") == 0); |
| ASSERT (symlink (BASE "dir/file", BASE "link") == 0); |
| errno = 0; |
| ASSERT (func (BASE "link/") == -1); |
| ASSERT (errno == ENOTDIR); |
| /* Order here proves unlink of a symlink does not follow through to |
| the file. */ |
| ASSERT (func (BASE "link") == 0); |
| ASSERT (func (BASE "dir/file") == 0); |
| ASSERT (rmdir (BASE "dir") == 0); |
| |
| return 0; |
| } |