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-rw-r--r--tests/test-symlink.h96
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diff --git a/tests/test-symlink.h b/tests/test-symlink.h
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+/* Tests of symlink.
+ 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 symlink(a,b) and
+ symlinkat(a,AT_FDCWD,b). FUNC is the function to test. 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_symlink (int (*func) (char const *, char const *), bool print)
+{
+ if (func ("nowhere", BASE "link1"))
+ {
+ if (print)
+ fputs ("skipping test: symlinks not supported on this file system\n",
+ stderr);
+ return 77;
+ }
+
+ /* Some systems allow the creation of 0-length symlinks as a synonym
+ for "."; but most reject it. */
+ {
+ int status;
+ errno = 0;
+ status = func ("", BASE "link2");
+ if (status == -1)
+ ASSERT (errno == ENOENT || errno == EINVAL);
+ else
+ {
+ ASSERT (status == 0);
+ ASSERT (unlink (BASE "link2") == 0);
+ }
+ }
+
+ /* Sanity checks of failures. */
+ errno = 0;
+ ASSERT (func ("nowhere", "") == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (func ("nowhere", ".") == -1);
+ ASSERT (errno == EEXIST || errno == EINVAL);
+ errno = 0;
+ ASSERT (func ("somewhere", BASE "link1") == -1);
+ ASSERT (errno == EEXIST);
+ errno = 0;
+ ASSERT (func ("nowhere", BASE "link2/") == -1);
+ ASSERT (errno == ENOTDIR || errno == ENOENT);
+ ASSERT (mkdir (BASE "dir", 0700) == 0);
+ errno = 0;
+ ASSERT (func ("nowhere", BASE "dir") == -1);
+ ASSERT (errno == EEXIST);
+ errno = 0;
+ ASSERT (func ("nowhere", BASE "dir/") == -1);
+ ASSERT (errno == EEXIST || errno == EINVAL
+ || errno == ENOENT /* Lustre FS on Linux */);
+ ASSERT (close (creat (BASE "file", 0600)) == 0);
+ errno = 0;
+ ASSERT (func ("nowhere", BASE "file") == -1);
+ ASSERT (errno == EEXIST);
+ errno = 0;
+ ASSERT (func ("nowhere", BASE "file/") == -1);
+ ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
+
+ /* Trailing slash must always be rejected. */
+ ASSERT (unlink (BASE "link1") == 0);
+ ASSERT (func (BASE "link2", BASE "link1") == 0);
+ errno = 0;
+ ASSERT (func (BASE "nowhere", BASE "link1/") == -1);
+ ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
+ errno = 0;
+ ASSERT (unlink (BASE "link2") == -1);
+ ASSERT (errno == ENOENT);
+
+ /* Cleanup. */
+ ASSERT (rmdir (BASE "dir") == 0);
+ ASSERT (unlink (BASE "file") == 0);
+ ASSERT (unlink (BASE "link1") == 0);
+
+ return 0;
+}