    {-# OPTIONS_GHC -fno-implicit-prelude #-}
    -----------------------------------------------------------------------------
    -- |
    -- Module      :  System.Posix.Types
    -- 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 data types: Haskell equivalents of the types defined by the
    -- @\<sys\/types.h>@ C header on a POSIX system.
    --
    -----------------------------------------------------------------------------
    #ifdef __NHC__
    #define HTYPE_DEV_T
    #define HTYPE_INO_T
    #define HTYPE_MODE_T
    #define HTYPE_OFF_T
    #define HTYPE_PID_T
    #define HTYPE_SSIZE_T
    #define HTYPE_GID_T
    #define HTYPE_NLINK_T
    #define HTYPE_UID_T
    #define HTYPE_CC_T
    #define HTYPE_SPEED_T
    #define HTYPE_TCFLAG_T
    #define HTYPE_RLIM_T
    #define HTYPE_NLINK_T
    #define HTYPE_UID_T
    #define HTYPE_GID_T
    #else
    #include "HsBaseConfig.h"
    #endif

    module System.Posix.Types (

      -- * POSIX data types
    #if defined(HTYPE_DEV_T)
      CDev,
    #endif
    #if defined(HTYPE_INO_T)
      CIno,
    #endif
    #if defined(HTYPE_MODE_T)
      CMode,
    #endif
    #if defined(HTYPE_OFF_T)
      COff,
    #endif
    #if defined(HTYPE_PID_T)
      CPid,
    #endif
    #if defined(HTYPE_SSIZE_T)
      CSsize,
    #endif

    #if defined(HTYPE_GID_T)
      CGid,
    #endif
    #if defined(HTYPE_NLINK_T)
      CNlink,
    #endif
    #if defined(HTYPE_UID_T)
      CUid,
    #endif
    #if defined(HTYPE_CC_T)
      CCc,
    #endif
    #if defined(HTYPE_SPEED_T)
      CSpeed,
    #endif
    #if defined(HTYPE_TCFLAG_T)
      CTcflag,
    #endif
    #if defined(HTYPE_RLIM_T)
      CRLim,
    #endif

      Fd(..),

    #if defined(HTYPE_NLINK_T)
      LinkCount,
    #endif
    #if defined(HTYPE_UID_T)
      UserID,
    #endif
    #if defined(HTYPE_GID_T)
      GroupID,
    #endif

      ByteCount,
      ClockTick,
      EpochTime,
      FileOffset,
      ProcessID,
      ProcessGroupID,
      DeviceID,
      FileID,
      FileMode,
      Limit
     ) where

    #ifdef __NHC__
    import NHC.PosixTypes
    import Foreign.C
    #else

    import Foreign
    import Foreign.C
    import Data.Typeable
    import Data.Bits

    #ifdef __GLASGOW_HASKELL__
    import GHC.Base
    import GHC.Enum
    import GHC.Num
    import GHC.Real
    import GHC.Prim
    import GHC.Read
    import GHC.Show
    #else
    import Control.Monad
    #endif

    #include "CTypes.h"

    #if defined(HTYPE_DEV_T)
    ARITHMETIC_TYPE(CDev,tyConCDev,"CDev",HTYPE_DEV_T)
    #endif
    #if defined(HTYPE_INO_T)
    INTEGRAL_TYPE(CIno,tyConCIno,"CIno",HTYPE_INO_T)
    #endif
    #if defined(HTYPE_MODE_T)
    INTEGRAL_TYPE(CMode,tyConCMode,"CMode",HTYPE_MODE_T)
    #endif
    #if defined(HTYPE_OFF_T)
    INTEGRAL_TYPE(COff,tyConCOff,"COff",HTYPE_OFF_T)
    #endif
    #if defined(HTYPE_PID_T)
    INTEGRAL_TYPE(CPid,tyConCPid,"CPid",HTYPE_PID_T)
    #endif

    #if defined(HTYPE_SSIZE_T)
    INTEGRAL_TYPE(CSsize,tyConCSsize,"CSsize",HTYPE_SSIZE_T)
    #endif

    #if defined(HTYPE_GID_T)
    INTEGRAL_TYPE(CGid,tyConCGid,"CGid",HTYPE_GID_T)
    #endif
    #if defined(HTYPE_NLINK_T)
    INTEGRAL_TYPE(CNlink,tyConCNlink,"CNlink",HTYPE_NLINK_T)
    #endif

    #if defined(HTYPE_UID_T)
    INTEGRAL_TYPE(CUid,tyConCUid,"CUid",HTYPE_UID_T)
    #endif
    #if defined(HTYPE_CC_T)
    ARITHMETIC_TYPE(CCc,tyConCCc,"CCc",HTYPE_CC_T)
    #endif
    #if defined(HTYPE_SPEED_T)
    ARITHMETIC_TYPE(CSpeed,tyConCSpeed,"CSpeed",HTYPE_SPEED_T)
    #endif
    #if defined(HTYPE_TCFLAG_T)
    INTEGRAL_TYPE(CTcflag,tyConCTcflag,"CTcflag",HTYPE_TCFLAG_T)
    #endif
    #if defined(HTYPE_RLIM_T)
    INTEGRAL_TYPE(CRLim,tyConCRlim,"CRLim",HTYPE_RLIM_T)
    #endif

    -- ToDo: blksize_t, clockid_t, blkcnt_t, fsblkcnt_t, fsfilcnt_t, id_t, key_t
    -- suseconds_t, timer_t, useconds_t

    -- Make an Fd type rather than using CInt everywhere
    INTEGRAL_TYPE(Fd,tyConFd,"Fd",CInt)

    -- nicer names, and backwards compatibility with POSIX library:
    #if defined(HTYPE_NLINK_T)
    type LinkCount      = CNlink
    #endif
    #if defined(HTYPE_UID_T)
    type UserID         = CUid
    #endif
    #if defined(HTYPE_GID_T)
    type GroupID        = CGid
    #endif

    #endif /* !__NHC__ */

    type ByteCount      = CSize
    type ClockTick      = CClock
    type EpochTime      = CTime
    type DeviceID       = CDev
    type FileID         = CIno
    type FileMode       = CMode
    type ProcessID      = CPid
    type FileOffset     = COff
    type ProcessGroupID = CPid
    type Limit	    = CLong