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|
{-# OPTIONS_GHC -cpp -fffi #-}
-----------------------------------------------------------------------------
-- |
-- Module : System.Process.Internals
-- Copyright : (c) The University of Glasgow 2004
-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : libraries@haskell.org
-- Stability : experimental
-- Portability : portable
--
-- Operations for creating and interacting with sub-processes.
--
-----------------------------------------------------------------------------
-- #hide
module System.Process.Internals (
ProcessHandle(..), PHANDLE,
#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__)
pPrPr_disableITimers, c_execvpe
#endif
) where
import Prelude -- necessary to get dependencies right
#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__)
import System.Posix.Types ( CPid )
#else
import Data.Word ( Word32 )
#endif
import Foreign.C.String ( CString )
import Foreign.C.Types ( CInt )
import Foreign.Ptr ( Ptr )
#ifdef __HUGS__
{-# CFILES cbits/execvpe.c #-}
#endif
-- ----------------------------------------------------------------------------
-- ProcessHandle type
{- | A handle to a process, which can be used to wait for termination
of the process using 'waitForProcess'.
None of the process-creation functions in this library wait for
termination: they all return a 'ProcessHandle' which may be used
to wait for the process later.
-}
#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__)
type PHANDLE = CPid
#else
type PHANDLE = Word32
#endif
newtype ProcessHandle = ProcessHandle PHANDLE
-- ----------------------------------------------------------------------------
#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__)
-- this function disables the itimer, which would otherwise cause confusing
-- signals to be sent to the new process.
foreign import ccall unsafe "pPrPr_disableITimers"
pPrPr_disableITimers :: IO ()
foreign import ccall unsafe "execvpe"
c_execvpe :: CString -> Ptr CString -> Ptr CString -> IO CInt
#endif
|
