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diff --git a/System/Posix/Directory/Common.hsc b/System/Posix/Directory/Common.hsc
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+{-# LANGUAGE ForeignFunctionInterface #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+#if __GLASGOW_HASKELL__ >= 701
+{-# LANGUAGE Trustworthy #-}
+#endif
+
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  System.Posix.Directory.Common
+-- Copyright   :  (c) The University of Glasgow 2002
+-- License     :  BSD-style (see the file libraries/base/LICENSE)
+-- 
+-- Maintainer  :  libraries@haskell.org
+-- Stability   :  provisional
+-- Portability :  non-portable (requires POSIX)
+--
+-- POSIX directory support
+--
+-----------------------------------------------------------------------------
+
+module System.Posix.Directory.Common (
+       DirStream(..), CDir, CDirent, DirStreamOffset(..),
+       rewindDirStream,
+       closeDirStream,
+       seekDirStream,
+       tellDirStream,
+       changeWorkingDirectoryFd,
+  ) where
+
+import System.IO.Error
+import System.Posix.Error
+import System.Posix.Types
+import Foreign
+import Foreign.C
+
+newtype DirStream = DirStream (Ptr CDir)
+
+type CDir       = ()
+type CDirent    = ()
+
+-- | @rewindDirStream dp@ calls @rewinddir@ to reposition
+--   the directory stream @dp@ at the beginning of the directory.
+rewindDirStream :: DirStream -> IO ()
+rewindDirStream (DirStream dirp) = c_rewinddir dirp
+
+foreign import ccall unsafe "rewinddir"
+   c_rewinddir :: Ptr CDir -> IO ()
+
+-- | @closeDirStream dp@ calls @closedir@ to close
+--   the directory stream @dp@.
+closeDirStream :: DirStream -> IO ()
+closeDirStream (DirStream dirp) = do
+  throwErrnoIfMinus1Retry_ "closeDirStream" (c_closedir dirp)
+
+foreign import ccall unsafe "closedir"
+   c_closedir :: Ptr CDir -> IO CInt
+
+newtype DirStreamOffset = DirStreamOffset COff
+
+seekDirStream :: DirStream -> DirStreamOffset -> IO ()
+seekDirStream (DirStream dirp) (DirStreamOffset off) =
+  c_seekdir dirp off
+
+foreign import ccall unsafe "seekdir"
+  c_seekdir :: Ptr CDir -> COff -> IO ()
+
+tellDirStream :: DirStream -> IO DirStreamOffset
+tellDirStream (DirStream dirp) = do
+  off <- c_telldir dirp
+  return (DirStreamOffset off)
+
+foreign import ccall unsafe "telldir"
+  c_telldir :: Ptr CDir -> IO COff
+
+changeWorkingDirectoryFd :: Fd -> IO ()
+changeWorkingDirectoryFd (Fd fd) = 
+  throwErrnoIfMinus1Retry_ "changeWorkingDirectoryFd" (c_fchdir fd)
+
+foreign import ccall unsafe "fchdir"
+  c_fchdir :: CInt -> IO CInt