1 files changed, 107 insertions, 0 deletions
diff --git a/tests/test-fstatat.c b/tests/test-fstatat.c
new file mode 100644
index 00000000..65c80104
--- /dev/null
+++ b/tests/test-fstatat.c
@@ -0,0 +1,107 @@
+/* Tests of fstatat.
+   Copyright (C) 2009-2024 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 <sys/stat.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fstatat, int, (int, char const *, struct stat *, int));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "openat.h"
+#include "same-inode.h"
+#include "ignore-value.h"
+#include "macros.h"
+
+#ifndef BASE
+# define BASE "test-fstatat.t"
+#endif
+
+#include "test-lstat.h"
+#include "test-stat.h"
+
+static int dfd = AT_FDCWD;
+
+/* Wrapper around fstatat to test stat behavior.  */
+static int
+do_stat (char const *name, struct stat *st)
+{
+#ifdef TEST_STATAT
+  return statat (dfd, name, st);
+#else
+  return fstatat (dfd, name, st, 0);
+#endif
+}
+
+/* Wrapper around fstatat to test lstat behavior.  */
+static int
+do_lstat (char const *name, struct stat *st)
+{
+#ifdef TEST_STATAT
+  return lstatat (dfd, name, st);
+#else
+  return fstatat (dfd, name, st, AT_SYMLINK_NOFOLLOW);
+#endif
+}
+
+int
+main (_GL_UNUSED int argc, _GL_UNUSED char *argv[])
+{
+  int result;
+
+  /* Remove any leftovers from a previous partial run.  */
+  ignore_value (system ("rm -rf " BASE "*"));
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct stat statbuf;
+
+    errno = 0;
+    ASSERT (fstatat (-1, "foo", &statbuf, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct stat statbuf;
+
+    close (99);
+    errno = 0;
+    ASSERT (fstatat (99, "foo", &statbuf, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  result = test_stat_func (do_stat, false);
+  ASSERT (test_lstat_func (do_lstat, false) == result);
+  dfd = open (".", O_RDONLY);
+  ASSERT (0 <= dfd);
+  ASSERT (test_stat_func (do_stat, false) == result);
+  ASSERT (test_lstat_func (do_lstat, false) == result);
+  ASSERT (close (dfd) == 0);
+
+  /* FIXME - add additional tests of dfd not at current directory.  */
+
+  if (result == 77)
+    fputs ("skipping test: symlinks not supported on this file system\n",
+           stderr);
+  return (result ? result : test_exit_status);
+}