1 files changed, 208 insertions, 0 deletions
diff --git a/gnulib-tests/test-renameat.c b/gnulib-tests/test-renameat.c
new file mode 100644
index 0000000..8e56fc0
--- /dev/null
+++ b/gnulib-tests/test-renameat.c
@@ -0,0 +1,208 @@
+/* Tests of renameat.
+   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.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (renameat, int, (int, char const *, int, char const *));
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.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-renameat.t"
+
+#include "test-rename.h"
+
+static int dfd1 = AT_FDCWD;
+static int dfd2 = AT_FDCWD;
+
+/* Wrapper to test renameat like rename.  */
+static int
+do_rename (char const *name1, char const *name2)
+{
+  return renameat (dfd1, name1, dfd2, name2);
+}
+
+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 (renameat (-1, "foo", AT_FDCWD, "bar") == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (renameat (99, "foo", AT_FDCWD, "bar") == -1);
+    ASSERT (errno == EBADF);
+  }
+  ASSERT (close (creat (BASE "oo", 0600)) == 0);
+  {
+    errno = 0;
+    ASSERT (renameat (AT_FDCWD, BASE "oo", -1, "bar") == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    errno = 0;
+    ASSERT (renameat (AT_FDCWD, BASE "oo", 99, "bar") == -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 (renameat (fd1, file1, fd2, file2) == 0);
+      free (file1);
+      free (file2);
+    }
+  dfd2 = open ("..", O_RDONLY);
+  ASSERT (0 <= dfd2);
+  ASSERT (renameat (dfd, "../" BASE "16", dfd2, BASE "17") == 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 (renameat (dfd, BASE "sub1", dfd, BASE "sub2") == -1);
+  ASSERT (errno == EEXIST || errno == ENOTEMPTY);
+  ASSERT (unlink (BASE "sub2/file") == 0);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "sub2", dfd, BASE "sub1/.") == -1);
+  ASSERT (errno == EINVAL || errno == EISDIR || errno == EBUSY
+          || errno == ENOTEMPTY || errno == EEXIST
+          || errno == ENOENT /* WSL */);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "sub2/.", dfd, BASE "sub1") == -1);
+  ASSERT (errno == EINVAL || errno == EBUSY || errno == EEXIST
+          || errno == ENOENT /* WSL */);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "17", dfd, BASE "sub1") == -1);
+  ASSERT (errno == EISDIR);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "nosuch", dfd, BASE "18") == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (renameat (dfd, "", dfd, BASE "17") == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "17", dfd, "") == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "sub2", dfd, BASE "17") == -1);
+  ASSERT (errno == ENOTDIR);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "17/", dfd, BASE "18") == -1);
+  ASSERT (errno == ENOTDIR);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "17", dfd, BASE "18/") == -1);
+  ASSERT (errno == ENOTDIR || errno == ENOENT);
+
+  /* Finally, make sure we can overwrite existing files.  */
+  ASSERT (close (creat (BASE "sub2/file", 0600)) == 0);
+  errno = 0;
+  ASSERT (renameat (dfd, BASE "sub2", dfd, BASE "sub1") == 0);
+  ASSERT (renameat (dfd, BASE "sub1/file", dfd, BASE "17") == 0);
+
+  /* Cleanup.  */
+  ASSERT (close (dfd) == 0);
+  errno = 0;
+  ASSERT (unlink (BASE "sub1/file") == -1);
+  ASSERT (errno == ENOENT);
+  ASSERT (unlink (BASE "17") == 0);
+  ASSERT (rmdir (BASE "sub1") == 0);
+  errno = 0;
+  ASSERT (rmdir (BASE "sub2") == -1);
+  ASSERT (errno == ENOENT);
+  free (cwd);
+
+  if (result)
+    fputs ("skipping test: symlinks not supported on this file system\n",
+           stderr);
+  return result;
+}