import Prelude hiding ( catch )
import qualified Prelude
+import Control.Monad (guard)
import System.Environment ( getEnv )
import System.FilePath
import System.IO
import System.IO.Error hiding ( catch, try )
import Control.Monad ( when, unless )
-import Control.Exception
+import Control.Exception.Base
#ifdef __NHC__
-import Directory
+import Directory hiding ( getDirectoryContents
+ , doesDirectoryExist, doesFileExist
+ , getModificationTime )
import System (system)
#endif /* __NHC__ */
{-# CFILES cbits/directory.c #-}
-#ifdef __GLASGOW_HASKELL__
import System.Posix.Types
import System.Posix.Internals
import System.Time ( ClockTime(..) )
+#ifdef __GLASGOW_HASKELL__
import GHC.IOBase ( IOException(..), IOErrorType(..), ioException )
+#ifdef mingw32_HOST_OS
+import qualified System.Win32
+#else
+import qualified System.Posix
+#endif
+
{- $intro
A directory contains a series of entries, each of which is a named
reference to a file system object (file, directory etc.). Some
createDirectory :: FilePath -> IO ()
createDirectory path = do
- modifyIOError (`ioeSetFileName` path) $
- withCString path $ \s -> do
- throwErrnoIfMinus1Retry_ "createDirectory" $
- mkdir s 0o777
+#ifdef mingw32_HOST_OS
+ System.Win32.createDirectory path Nothing
+#else
+ System.Posix.createDirectory path 0o777
+#endif
#else /* !__GLASGOW_HASKELL__ */
createDirectoryIfMissing :: Bool -- ^ Create its parents too?
-> FilePath -- ^ The path to the directory you want to make
-> IO ()
-createDirectoryIfMissing parents file = do
- b <- doesDirectoryExist file
- case (b,parents, file) of
- (_, _, "") -> return ()
- (True, _, _) -> return ()
- (_, True, _) -> mapM_ (createDirectoryIfMissing False) $ mkParents file
- (_, False, _) -> createDirectory file
- where mkParents = scanl1 (</>) . splitDirectories . normalise
+createDirectoryIfMissing create_parents path0
+ | create_parents = createDirs (parents path0)
+ | otherwise = createDirs (take 1 (parents path0))
+ where
+ parents = reverse . scanl1 (</>) . splitDirectories . normalise
+
+ createDirs [] = return ()
+ createDirs (dir:[]) = createDir dir throw
+ createDirs (dir:dirs) =
+ createDir dir $ \_ -> do
+ createDirs dirs
+ createDir dir throw
+
+ createDir :: FilePath -> (IOException -> IO ()) -> IO ()
+ createDir dir notExistHandler = do
+ r <- try $ createDirectory dir
+ case (r :: Either IOException ()) of
+ Right () -> return ()
+ Left e
+ | isDoesNotExistError e -> notExistHandler e
+ -- createDirectory (and indeed POSIX mkdir) does not distinguish
+ -- between a dir already existing and a file already existing. So we
+ -- check for it here. Unfortunately there is a slight race condition
+ -- here, but we think it is benign. It could report an exeption in
+ -- the case that the dir did exist but another process deletes the
+ -- directory and creates a file in its place before we can check
+ -- that the directory did indeed exist.
+ | isAlreadyExistsError e ->
+ (withFileStatus "createDirectoryIfMissing" dir $ \st -> do
+ isDir <- isDirectory st
+ if isDir then return ()
+ else throw e
+ ) `catch` ((\_ -> return ()) :: IOException -> IO ())
+ | otherwise -> throw e
#if __GLASGOW_HASKELL__
{- | @'removeDirectory' dir@ removes an existing directory /dir/. The
-}
removeDirectory :: FilePath -> IO ()
-removeDirectory path = do
- modifyIOError (`ioeSetFileName` path) $
- withCString path $ \s ->
- throwErrnoIfMinus1Retry_ "removeDirectory" (c_rmdir s)
+removeDirectory path =
+#ifdef mingw32_HOST_OS
+ System.Win32.removeDirectory path
+#else
+ System.Posix.removeDirectory path
+#endif
+
#endif
-- | @'removeDirectoryRecursive' dir@ removes an existing directory /dir/
-}
removeFile :: FilePath -> IO ()
-removeFile path = do
- modifyIOError (`ioeSetFileName` path) $
- withCString path $ \s ->
- throwErrnoIfMinus1Retry_ "removeFile" (c_unlink s)
+removeFile path =
+#if mingw32_HOST_OS
+ System.Win32.deleteFile path
+#else
+ System.Posix.removeLink path
+#endif
{- |@'renameDirectory' old new@ changes the name of an existing
directory from /old/ to /new/. If the /new/ directory
renameDirectory :: FilePath -> FilePath -> IO ()
renameDirectory opath npath =
+ -- XXX this test isn't performed atomically with the following rename
withFileStatus "renameDirectory" opath $ \st -> do
is_dir <- isDirectory st
if (not is_dir)
- then ioException (IOError Nothing InappropriateType "renameDirectory"
- ("not a directory") (Just opath))
+ then ioException (ioeSetErrorString
+ (mkIOError InappropriateType "renameDirectory" Nothing (Just opath))
+ "not a directory")
else do
-
- withCString opath $ \s1 ->
- withCString npath $ \s2 ->
- throwErrnoIfMinus1Retry_ "renameDirectory" (c_rename s1 s2)
+#ifdef mingw32_HOST_OS
+ System.Win32.moveFileEx opath npath System.Win32.mOVEFILE_REPLACE_EXISTING
+#else
+ System.Posix.rename opath npath
+#endif
{- |@'renameFile' old new@ changes the name of an existing file system
object from /old/ to /new/. If the /new/ object already
renameFile :: FilePath -> FilePath -> IO ()
renameFile opath npath =
+ -- XXX this test isn't performed atomically with the following rename
withFileOrSymlinkStatus "renameFile" opath $ \st -> do
is_dir <- isDirectory st
if is_dir
- then ioException (IOError Nothing InappropriateType "renameFile"
- "is a directory" (Just opath))
+ then ioException (ioeSetErrorString
+ (mkIOError InappropriateType "renameFile" Nothing (Just opath))
+ "is a directory")
else do
-
- withCString opath $ \s1 ->
- withCString npath $ \s2 ->
- throwErrnoIfMinus1Retry_ "renameFile" (c_rename s1 s2)
+#ifdef mingw32_HOST_OS
+ System.Win32.moveFileEx opath npath System.Win32.mOVEFILE_REPLACE_EXISTING
+#else
+ System.Posix.rename opath npath
+#endif
#endif /* __GLASGOW_HASKELL__ */
#ifdef __NHC__
copyFile fromFPath toFPath =
do readFile fromFPath >>= writeFile toFPath
- try (copyPermissions fromFPath toFPath)
- return ()
+ Prelude.catch (copyPermissions fromFPath toFPath)
+ (\_ -> return ())
#else
copyFile fromFPath toFPath =
copy `Prelude.catch` (\exc -> throw $ ioeSetLocation exc "copyFile")
bracketOnError openTmp cleanTmp $ \(tmpFPath, hTmp) ->
do allocaBytes bufferSize $ copyContents hFrom hTmp
hClose hTmp
- ignoreExceptions $ copyPermissions fromFPath tmpFPath
+ ignoreIOExceptions $ copyPermissions fromFPath tmpFPath
renameFile tmpFPath toFPath
openTmp = openBinaryTempFile (takeDirectory toFPath) ".copyFile.tmp"
- cleanTmp (tmpFPath, hTmp) = do ignoreExceptions $ hClose hTmp
- ignoreExceptions $ removeFile tmpFPath
+ cleanTmp (tmpFPath, hTmp)
+ = do ignoreIOExceptions $ hClose hTmp
+ ignoreIOExceptions $ removeFile tmpFPath
bufferSize = 1024
copyContents hFrom hTo buffer = do
when (count > 0) $ do
hPutBuf hTo buffer count
copyContents hFrom hTo buffer
+
+ ignoreIOExceptions io = io `catch` ioExceptionIgnorer
+ ioExceptionIgnorer :: IOException -> IO ()
+ ioExceptionIgnorer _ = return ()
#endif
-- | Given path referring to a file or directory, returns a
#endif
-#ifdef __GLASGOW_HASKELL__
+#ifndef __HUGS__
{- |@'getDirectoryContents' dir@ returns a list of /all/ entries
in /dir/.
return (entry:entries)
else do errno <- getErrno
if (errno == eINTR) then loop ptr_dEnt dir else do
- let (Errno eo) = errno
- if (eo == end_of_dir)
- then return []
- else throwErrno desc
-
+ let (Errno eo) = errno
+ if (eo == end_of_dir)
+ then return []
+ else throwErrno desc
+#endif /* !__HUGS__ */
{- |If the operating system has a notion of current directories,
The operating system has no notion of current directory.
-}
-
+#ifdef __GLASGOW_HASKELL__
getCurrentDirectory :: IO FilePath
getCurrentDirectory = do
- p <- mallocBytes long_path_size
- go p long_path_size
- where go p bytes = do
- p' <- c_getcwd p (fromIntegral bytes)
- if p' /= nullPtr
- then do s <- peekCString p'
- free p'
- return s
- else do errno <- getErrno
- if errno == eRANGE
- then do let bytes' = bytes * 2
- p'' <- reallocBytes p bytes'
- go p'' bytes'
- else throwErrno "getCurrentDirectory"
+#ifdef mingw32_HOST_OS
+ System.Win32.getCurrentDirectory
+#else
+ System.Posix.getWorkingDirectory
+#endif
{- |If the operating system has a notion of current directories,
@'setCurrentDirectory' dir@ changes the current
-}
setCurrentDirectory :: FilePath -> IO ()
-setCurrentDirectory path = do
- modifyIOError (`ioeSetFileName` path) $
- withCString path $ \s ->
- throwErrnoIfMinus1Retry_ "setCurrentDirectory" (c_chdir s)
- -- ToDo: add path to error
+setCurrentDirectory path =
+#ifdef mingw32_HOST_OS
+ System.Win32.setCurrentDirectory path
+#else
+ System.Posix.changeWorkingDirectory path
+#endif
+
+#endif /* __GLASGOW_HASKELL__ */
+#ifndef __HUGS__
{- |The operation 'doesDirectoryExist' returns 'True' if the argument file
exists and is a directory, and 'False' otherwise.
-}
doesDirectoryExist :: FilePath -> IO Bool
-doesDirectoryExist name =
- catchAny
+doesDirectoryExist name =
(withFileStatus "doesDirectoryExist" name $ \st -> isDirectory st)
- (\ _ -> return False)
+ `catch` ((\ _ -> return False) :: IOException -> IO Bool)
{- |The operation 'doesFileExist' returns 'True'
if the argument file exists and is not a directory, and 'False' otherwise.
-}
doesFileExist :: FilePath -> IO Bool
-doesFileExist name = do
- catchAny
+doesFileExist name =
(withFileStatus "doesFileExist" name $ \st -> do b <- isDirectory st; return (not b))
- (\ _ -> return False)
+ `catch` ((\ _ -> return False) :: IOException -> IO Bool)
{- |The 'getModificationTime' operation returns the
clock time at which the file or directory was last modified.
withFileStatus "getModificationTime" name $ \ st ->
modificationTime st
+#endif /* !__HUGS__ */
+
withFileStatus :: String -> FilePath -> (Ptr CStat -> IO a) -> IO a
withFileStatus loc name f = do
modifyIOError (`ioeSetFileName` name) $
foreign import ccall unsafe "__hscore_S_IFDIR" s_IFDIR :: CMode
#endif
+
+#ifdef __GLASGOW_HASKELL__
foreign import ccall unsafe "__hscore_long_path_size"
long_path_size :: Int
-
#else
long_path_size :: Int
long_path_size = 2048 -- // guess?
-
#endif /* __GLASGOW_HASKELL__ */
{- | Returns the current user's home directory.
getTemporaryDirectory :: IO FilePath
getTemporaryDirectory = do
#if defined(mingw32_HOST_OS)
- allocaBytes long_path_size $ \pPath -> do
- _r <- c_GetTempPath (fromIntegral long_path_size) pPath
- peekCString pPath
+ System.Win32.getTemporaryDirectory
#else
getEnv "TMPDIR"
#if !__NHC__
`Prelude.catch` \e -> if isDoesNotExistError e then return "/tmp"
else throw e
#else
- `catch` (\ex -> return "/tmp")
+ `Prelude.catch` (\ex -> return "/tmp")
#endif
#endif
foreign import ccall unsafe "__hscore_CSIDL_WINDOWS" csidl_WINDOWS :: CInt
foreign import ccall unsafe "__hscore_CSIDL_PERSONAL" csidl_PERSONAL :: CInt
-foreign import stdcall unsafe "GetTempPathA" c_GetTempPath :: CInt -> CString -> IO CInt
-
raiseUnsupported :: String -> IO ()
raiseUnsupported loc =
- ioException (IOError Nothing UnsupportedOperation loc "unsupported operation" Nothing)
+ ioException (ioeSetErrorString (mkIOError UnsupportedOperation loc Nothing Nothing) "unsupported operation")
#endif
#else
exeExtension = ""
#endif
-