1 files changed, 37 insertions, 0 deletions
diff --git a/tests/d_type-check b/tests/d_type-check
new file mode 100644
index 000000000..e40904907
--- /dev/null
+++ b/tests/d_type-check
@@ -0,0 +1,37 @@
+#!/usr/bin/python
+# Exit 0 if "." has useful d_type information, else 1.
+# Intended to exit 0 only on Linux/GNU systems.
+import sys
+
+fail = 1
+try:
+  import ctypes
+
+  (DT_UNKNOWN, DT_DIR,) = (0, 4,)
+
+  class dirent(ctypes.Structure):
+    _fields_ = [
+      ("d_ino", ctypes.c_long),
+      ("d_off", ctypes.c_long),
+      ("d_reclen", ctypes.c_ushort),
+      ("d_type", ctypes.c_ubyte),
+      ("d_name", ctypes.c_char*256)]
+
+  direntp = ctypes.POINTER(dirent)
+
+  # FIXME: find a way to hard-coding libc's so-name.
+  libc = ctypes.cdll.LoadLibrary("libc.so.6")
+  libc.readdir.restype = direntp
+
+  dirp = libc.opendir(".")
+  if dirp:
+    ep = libc.readdir(dirp)
+    if ep:
+      name = ep.contents.d_name
+      if (name == "." or name == "..") and ep.contents.d_type == DT_DIR:
+        fail = 0
+
+except:
+  pass
+
+sys.exit(fail)