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-rw-r--r--gnulib-tests/test-unlink.h86
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diff --git a/gnulib-tests/test-unlink.h b/gnulib-tests/test-unlink.h
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+/* Tests of unlink.
+ Copyright (C) 2009-2022 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;
+}