1 files changed, 64 insertions, 0 deletions
diff --git a/gnulib-tests/test-fchmodat.c b/gnulib-tests/test-fchmodat.c
new file mode 100644
index 0000000..f6b695b
--- /dev/null
+++ b/gnulib-tests/test-fchmodat.c
@@ -0,0 +1,64 @@
+/* Test changing the protections of a file relative to an open directory.
+   Copyright (C) 2011-2020 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/>.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fchmodat, int, (int, const char *, mode_t, int));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-fchmodat."
+
+int
+main (void)
+{
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (fchmodat (-1, "foo", 0600, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (fchmodat (99, "foo", 0600, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  /* Test that fchmodat works on non-symlinks, when given
+     the AT_SYMLINK_NOFOLLOW flag.  */
+  {
+    struct stat statbuf;
+    unlink (BASE "file");
+    ASSERT (close (creat (BASE "file", 0600)) == 0);
+    ASSERT (fchmodat (AT_FDCWD, BASE "file", 0400, AT_SYMLINK_NOFOLLOW) == 0);
+    ASSERT (stat (BASE "file", &statbuf) >= 0);
+    ASSERT ((statbuf.st_mode & 0700) == 0400);
+    /* Clean up.  */
+    ASSERT (chmod (BASE "file", 0600) == 0);
+    ASSERT (unlink (BASE "file") == 0);
+  }
+
+  return 0;
+}