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|
{-# LANGUAGE ForeignFunctionInterface #-}
#if __GLASGOW_HASKELL__ >= 701
{-# LANGUAGE Trustworthy #-}
#endif
-----------------------------------------------------------------------------
-- |
-- Module : System.Posix.Temp.ByteString
-- Copyright : (c) Volker Stolz <vs@foldr.org>
-- License : BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer : vs@foldr.org
-- Stability : provisional
-- Portability : non-portable (requires POSIX)
--
-- POSIX environment support
--
-----------------------------------------------------------------------------
module System.Posix.Temp.ByteString (
mkstemp
{- Not ported (yet?):
tmpfile: can we handle FILE*?
tmpnam: ISO C, should go in base?
tempname: dito
-}
) where
#include "HsUnix.h"
import System.IO (Handle)
import System.Posix.IO
import System.Posix.Types
import Foreign.C hiding (
throwErrnoPath,
throwErrnoPathIf,
throwErrnoPathIf_,
throwErrnoPathIfNull,
throwErrnoPathIfMinus1,
throwErrnoPathIfMinus1_ )
import System.Posix.ByteString.FilePath
import Data.ByteString (ByteString)
-- |'mkstemp' - make a unique filename and open it for
-- reading\/writing (only safe on GHC & Hugs).
-- The returned 'RawFilePath' is the (possibly relative) path of
-- the created file, which is padded with 6 random characters.
mkstemp :: ByteString -> IO (RawFilePath, Handle)
mkstemp template = do
#if defined(__GLASGOW_HASKELL__) || defined(__HUGS__)
withFilePath template $ \ ptr -> do
fd <- throwErrnoIfMinus1 "mkstemp" (c_mkstemp ptr)
name <- peekFilePath ptr
h <- fdToHandle (Fd fd)
return (name, h)
#else
name <- mktemp (template ++ "XXXXXX")
h <- openFile name ReadWriteMode
return (name, h)
-- |'mktemp' - make a unique file name
-- This function should be considered deprecated
mktemp :: ByteString -> IO RawFilePath
mktemp template = do
withFilePath template $ \ ptr -> do
ptr <- throwErrnoIfNull "mktemp" (c_mktemp ptr)
peekFilePath ptr
foreign import ccall unsafe "mktemp"
c_mktemp :: CString -> IO CString
#endif
foreign import ccall unsafe "HsUnix.h __hscore_mkstemp"
c_mkstemp :: CString -> IO CInt
|
