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diff --git a/gnulib-tests/test-renameatu.c b/gnulib-tests/test-renameatu.c
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+/* Test renameatu.
+ Copyright (C) 2009-2023 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. */
+
+#include <config.h>
+
+#include <renameatu.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (renameatu, int,
+ (int, char const *, int, char const *, unsigned int));
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include "filenamecat.h"
+#include "ignore-value.h"
+#include "macros.h"
+
+#define BASE "test-renameatu.t"
+
+#include "test-rename.h"
+
+static int dfd1 = AT_FDCWD;
+static int dfd2 = AT_FDCWD;
+
+/* Wrapper to test renameatu like rename. */
+static int
+do_rename (char const *name1, char const *name2)
+{
+ return renameatu (dfd1, name1, dfd2, name2, 0);
+}
+
+int
+main (void)
+{
+ int i;
+ int dfd;
+ char *cwd;
+ int result;
+
+ /* Clean up any trash from prior testsuite runs. */
+ ignore_value (system ("rm -rf " BASE "*"));
+
+ /* Test behaviour for invalid file descriptors. */
+ {
+ errno = 0;
+ ASSERT (renameatu (-1, "foo", AT_FDCWD, "bar", 0) == -1);
+ ASSERT (errno == EBADF);
+ }
+ {
+ close (99);
+ errno = 0;
+ ASSERT (renameatu (99, "foo", AT_FDCWD, "bar", 0) == -1);
+ ASSERT (errno == EBADF);
+ }
+ ASSERT (close (creat (BASE "oo", 0600)) == 0);
+ {
+ errno = 0;
+ ASSERT (renameatu (AT_FDCWD, BASE "oo", -1, "bar", 0) == -1);
+ ASSERT (errno == EBADF);
+ }
+ {
+ errno = 0;
+ ASSERT (renameatu (AT_FDCWD, BASE "oo", 99, "bar", 0) == -1);
+ ASSERT (errno == EBADF);
+ }
+ ASSERT (unlink (BASE "oo") == 0);
+
+ /* Test basic rename functionality, using current directory. */
+ result = test_rename (do_rename, false);
+ dfd1 = open (".", O_RDONLY);
+ ASSERT (0 <= dfd1);
+ ASSERT (test_rename (do_rename, false) == result);
+ dfd2 = dfd1;
+ ASSERT (test_rename (do_rename, false) == result);
+ dfd1 = AT_FDCWD;
+ ASSERT (test_rename (do_rename, false) == result);
+ ASSERT (close (dfd2) == 0);
+
+ /* Create locations to manipulate. */
+ ASSERT (mkdir (BASE "sub1", 0700) == 0);
+ ASSERT (mkdir (BASE "sub2", 0700) == 0);
+ dfd = creat (BASE "00", 0600);
+ ASSERT (0 <= dfd);
+ ASSERT (close (dfd) == 0);
+ cwd = getcwd (NULL, 0);
+ ASSERT (cwd);
+
+ dfd = open (BASE "sub1", O_RDONLY);
+ ASSERT (0 <= dfd);
+ ASSERT (chdir (BASE "sub2") == 0);
+
+ /* There are 16 possible scenarios, based on whether an fd is
+ AT_FDCWD or real, and whether a file is absolute or relative.
+
+ To ensure that we test all of the code paths (rather than
+ triggering early normalization optimizations), we use a loop to
+ repeatedly rename a file in the parent directory, use an fd open
+ on subdirectory 1, all while executing in subdirectory 2; all
+ relative names are thus given with a leading "../". Finally, the
+ last scenario (two relative paths given, neither one AT_FDCWD)
+ has two paths, based on whether the two fds are equivalent, so we
+ do the other variant after the loop. */
+ for (i = 0; i < 16; i++)
+ {
+ int fd1 = (i & 8) ? dfd : AT_FDCWD;
+ char *file1 = file_name_concat ((i & 4) ? ".." : cwd, BASE "xx", NULL);
+ int fd2 = (i & 2) ? dfd : AT_FDCWD;
+ char *file2 = file_name_concat ((i & 1) ? ".." : cwd, BASE "xx", NULL);
+
+ ASSERT (sprintf (strchr (file1, '\0') - 2, "%02d", i) == 2);
+ ASSERT (sprintf (strchr (file2, '\0') - 2, "%02d", i + 1) == 2);
+ ASSERT (renameatu (fd1, file1, fd2, file2, 0) == 0);
+ free (file1);
+ free (file2);
+ }
+ dfd2 = open ("..", O_RDONLY);
+ ASSERT (0 <= dfd2);
+ ASSERT (renameatu (dfd, "../" BASE "16", dfd2, BASE "17", 0) == 0);
+ ASSERT (close (dfd2) == 0);
+
+ /* Now we change back to the parent directory, and set dfd to ".";
+ using dfd in remaining tests will expose any bugs if emulation
+ via /proc/self/fd doesn't check for empty names. */
+ ASSERT (chdir ("..") == 0);
+ ASSERT (close (dfd) == 0);
+ dfd = open (".", O_RDONLY);
+ ASSERT (0 <= dfd);
+
+ ASSERT (close (creat (BASE "sub2/file", 0600)) == 0);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "sub1", dfd, BASE "sub2", 0) == -1);
+ ASSERT (errno == EEXIST || errno == ENOTEMPTY);
+ ASSERT (unlink (BASE "sub2/file") == 0);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "sub2", dfd, BASE "sub1/.", 0) == -1);
+ ASSERT (errno == EINVAL || errno == EISDIR || errno == EBUSY
+ || errno == ENOTEMPTY || errno == EEXIST
+ || errno == ENOENT /* WSL */);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "sub2/.", dfd, BASE "sub1", 0) == -1);
+ ASSERT (errno == EINVAL || errno == EBUSY || errno == EEXIST
+ || errno == ENOENT /* WSL */);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "17", dfd, BASE "sub1", 0) == -1);
+ ASSERT (errno == EISDIR);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "nosuch", dfd, BASE "18", 0) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (renameatu (dfd, "", dfd, BASE "17", 0) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "17", dfd, "", 0) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "sub2", dfd, BASE "17", 0) == -1);
+ ASSERT (errno == ENOTDIR);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "17/", dfd, BASE "18", 0) == -1);
+ ASSERT (errno == ENOTDIR);
+ errno = 0;
+ ASSERT (renameatu (dfd, BASE "17", dfd, BASE "18/", 0) == -1);
+ ASSERT (errno == ENOTDIR || errno == ENOENT);
+
+ /* Finally, make sure we cannot overwrite existing files. */
+ ASSERT (close (creat (BASE "sub2/file", 0600)) == 0);
+ errno = 0;
+ ASSERT ((renameatu (dfd, BASE "sub2/file", dfd, BASE "sub2/file",
+ RENAME_NOREPLACE)
+ == -1)
+ && errno == EEXIST);
+ errno = 0;
+ ASSERT ((renameatu (dfd, BASE "sub2", dfd, BASE "sub2", RENAME_NOREPLACE)
+ == -1)
+ && errno == EEXIST);
+ errno = 0;
+ ASSERT ((renameatu (dfd, BASE "sub2", dfd, BASE "sub1", RENAME_NOREPLACE)
+ == -1)
+ && errno == EEXIST);
+ errno = 0;
+ ASSERT ((renameatu (dfd, BASE "sub2/file", dfd, BASE "17", RENAME_NOREPLACE)
+ == -1)
+ && errno == EEXIST);
+
+ /* Cleanup. */
+ ASSERT (close (dfd) == 0);
+ ASSERT (unlink (BASE "sub2/file") == 0);
+ ASSERT (unlink (BASE "17") == 0);
+ ASSERT (rmdir (BASE "sub1") == 0);
+ ASSERT (rmdir (BASE "sub2") == 0);
+ free (cwd);
+
+ if (result)
+ fputs ("skipping test: symlinks not supported on this file system\n",
+ stderr);
+ return result;
+}
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