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Clean up

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This commit is contained in:
Julian Ospald
2020-01-26 22:40:03 +01:00
parent 768443df27
commit ecb52f5217
3 changed files with 381 additions and 588 deletions
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686
hpath-directory/src/System/Posix/RawFilePath/Directory.hs
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@@ -28,8 +28,6 @@
-- > import System.Posix.RawFilePath.Directory
{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE FlexibleContexts #-}
module System.Posix.RawFilePath.Directory
(
@@ -90,180 +88,135 @@ module System.Posix.RawFilePath.Directory
, canonicalizePath
, toAbs
)
where
where
import Control.Applicative
(
(<$>)
)
import Control.Exception.Safe
(
IOException
, bracket
, bracketOnError
, throwIO
, finally
)
import Control.Monad
(
unless
, void
, when
)
import Control.Monad.Catch (MonadThrow(..))
import Control.Monad.Fail (MonadFail)
import Control.Monad.IfElse
(
unlessM
)
import qualified Data.ByteString as BS
import Data.ByteString
(
ByteString
)
import Control.Applicative ( (<$>) )
import Control.Exception.Safe ( IOException
, bracket
, bracketOnError
, throwIO
, finally
)
import Control.Monad ( unless
, void
, when
)
import Control.Monad.Catch ( MonadThrow(..) )
import Control.Monad.Fail ( MonadFail )
import Control.Monad.IfElse ( unlessM )
import qualified Data.ByteString as BS
import Data.ByteString ( ByteString )
import Data.Traversable ( for )
import Data.Functor ( ($>) )
#if MIN_VERSION_bytestring(0,10,2)
import Data.ByteString.Builder
import Data.ByteString.Builder
#else
import Data.ByteString.Lazy.Builder
import Data.ByteString.Lazy.Builder
#endif
(
Builder
, byteString
, toLazyByteString
)
import qualified Data.ByteString.Lazy as L
import Data.ByteString.Unsafe
(
unsafePackCStringFinalizer
)
import Data.Foldable
(
for_
)
import Data.IORef
(
IORef
, modifyIORef
, newIORef
, readIORef
)
import Data.Maybe
(
catMaybes
)
import Data.Monoid
(
(<>)
, mempty
)
import Data.Time.Clock
import Data.Time.Clock.POSIX (getPOSIXTime, posixSecondsToUTCTime, POSIXTime)
import Data.Word
(
Word8
)
import Foreign.C.Error
(
eEXIST
, eNOENT
, eNOTEMPTY
, eXDEV
, getErrno
)
import Foreign.C.Types
(
CSize
)
import Foreign.Marshal.Alloc
(
allocaBytes
)
import Foreign.Ptr
(
Ptr
)
import GHC.IO.Exception
(
IOErrorType(..)
)
import Prelude hiding (appendFile, readFile, writeFile)
import Streamly
import Streamly.External.ByteString
import qualified Streamly.External.ByteString.Lazy as SL
import qualified Streamly.Data.Fold as FL
import Streamly.Memory.Array
import qualified Streamly.FileSystem.Handle as FH
( Builder
, byteString
, toLazyByteString
)
import qualified Data.ByteString.Lazy as L
import Data.ByteString.Unsafe ( unsafePackCStringFinalizer )
import qualified Data.ByteString.UTF8 as UTF8
import Data.Foldable ( for_ )
import Data.IORef ( IORef
, modifyIORef
, newIORef
, readIORef
)
import Data.Maybe ( catMaybes )
import Data.Monoid ( (<>)
, mempty
)
import Data.Time.Clock
import Data.Time.Clock.POSIX ( getPOSIXTime
, posixSecondsToUTCTime
, POSIXTime
)
import Data.Word ( Word8 )
import Foreign.C.Error ( eEXIST
, eNOENT
, eNOTEMPTY
, eXDEV
, getErrno
)
import Foreign.C.Types ( CSize )
import Foreign.Marshal.Alloc ( allocaBytes )
import Foreign.Ptr ( Ptr )
import GHC.IO.Exception ( IOErrorType(..) )
import Prelude hiding ( appendFile
, readFile
, writeFile
)
import Streamly
import Streamly.External.ByteString
import qualified Streamly.External.ByteString.Lazy
as SL
import qualified Streamly.Data.Fold as FL
import Streamly.Memory.Array
import qualified Streamly.FileSystem.Handle as FH
import qualified Streamly.Internal.Data.Unfold as SU
import qualified Streamly.Internal.FileSystem.Handle as IFH
import qualified Streamly.Internal.Memory.ArrayStream as AS
import qualified Streamly.Prelude as S
import qualified System.IO as SIO
import System.IO.Error
(
catchIOError
, ioeGetErrorType
)
import System.Posix.FilePath
import System.Posix.ByteString
(
exclusive
)
import System.Posix.RawFilePath.Directory.Errors
import System.Posix.Directory.ByteString
(
createDirectory
, closeDirStream
, getWorkingDirectory
, openDirStream
, removeDirectory
)
import System.Posix.RawFilePath.Directory.Traversals
(
getDirectoryContents'
)
import System.Posix.Files.ByteString
(
createSymbolicLink
, fileAccess
, fileMode
, getFdStatus
, groupExecuteMode
, groupReadMode
, groupWriteMode
, otherExecuteMode
, otherReadMode
, otherWriteMode
, ownerModes
, ownerReadMode
, ownerWriteMode
, readSymbolicLink
, removeLink
, rename
, setFileMode
, unionFileModes
)
import qualified System.Posix.FilePath as FP
import qualified Streamly.Internal.FileSystem.Handle
as IFH
import qualified Streamly.Internal.Memory.ArrayStream
as AS
import qualified Streamly.Prelude as S
import qualified System.IO as SIO
import System.IO.Error ( catchIOError
, ioeGetErrorType
)
import System.Posix.FilePath
import System.Posix.ByteString ( exclusive )
import System.Posix.RawFilePath.Directory.Errors
import System.Posix.Directory.ByteString
( createDirectory
, closeDirStream
, getWorkingDirectory
, openDirStream
, removeDirectory
)
import System.Posix.RawFilePath.Directory.Traversals
( getDirectoryContents' )
import System.Posix.Files.ByteString ( createSymbolicLink
, fileAccess
, fileMode
, getFdStatus
, groupExecuteMode
, groupReadMode
, groupWriteMode
, otherExecuteMode
, otherReadMode
, otherWriteMode
, ownerModes
, ownerReadMode
, ownerWriteMode
, readSymbolicLink
, removeLink
, rename
, setFileMode
, unionFileModes
)
import qualified System.Posix.FilePath as FP
import qualified System.Posix.Files.ByteString as PF
import qualified "unix" System.Posix.IO.ByteString as SPI
import qualified "unix-bytestring" System.Posix.IO.ByteString as SPB
import System.Posix.FD
(
openFd
)
import qualified System.Posix.RawFilePath.Directory.Traversals as SPDT
import qualified System.Posix.Foreign as SPDF
import qualified System.Posix.Process.ByteString as SPP
import System.Posix.Types
(
FileMode
, ProcessID
, Fd
, EpochTime
)
import System.Posix.Time
import qualified "unix" System.Posix.IO.ByteString
as SPI
import qualified "unix-bytestring" System.Posix.IO.ByteString
as SPB
import System.Posix.FD ( openFd )
import qualified System.Posix.RawFilePath.Directory.Traversals
as SPDT
import qualified System.Posix.Foreign as SPDF
import qualified System.Posix.Process.ByteString
as SPP
import System.Posix.Types ( FileMode
, ProcessID
, Fd
, EpochTime
)
import System.Posix.Time
@@ -372,72 +325,74 @@ copyDirRecursive :: RawFilePath -- ^ source dir
-> CopyMode
-> RecursiveErrorMode
-> IO ()
copyDirRecursive fromp destdirp cm rm
= do
ce <- newIORef []
-- for performance, sanity checks are only done for the top dir
throwSameFile fromp destdirp
throwDestinationInSource fromp destdirp
go ce fromp destdirp
collectedExceptions <- readIORef ce
unless (null collectedExceptions)
(throwIO . RecursiveFailure $ collectedExceptions)
where
basename :: MonadFail m => RawFilePath -> m RawFilePath
basename x = let b = takeBaseName x
in if BS.null b then fail ("No base name" :: String) else pure b
copyDirRecursive fromp destdirp cm rm = do
ce <- newIORef []
-- for performance, sanity checks are only done for the top dir
throwSameFile fromp destdirp
throwDestinationInSource fromp destdirp
go ce fromp destdirp
collectedExceptions <- readIORef ce
unless (null collectedExceptions)
(throwIO . RecursiveFailure $ collectedExceptions)
where
basename :: MonadFail m => RawFilePath -> m RawFilePath
basename x =
let b = takeBaseName x
in if BS.null b then fail ("No base name" :: String) else pure b
go :: IORef [(RecursiveFailureHint, IOException)]
-> RawFilePath -> RawFilePath -> IO ()
go ce from destdir = do
go :: IORef [(RecursiveFailureHint, IOException)]
-> RawFilePath
-> RawFilePath
-> IO ()
go ce from destdir = do
-- NOTE: order is important here, so we don't get empty directories
-- on failure
-- NOTE: order is important here, so we don't get empty directories
-- on failure
-- get the contents of the source dir
contents <- handleIOE (ReadContentsFailed from destdir) ce [] $ do
contents <- getDirsFiles from
-- get the contents of the source dir
contents <- handleIOE (ReadContentsFailed from destdir) ce [] $ do
contents <- getDirsFiles from
-- create the destination dir and
-- only return contents if we succeed
handleIOE (CreateDirFailed from destdir) ce [] $ do
fmode' <- PF.fileMode <$> PF.getSymbolicLinkStatus from
case cm of
Strict -> createDirectory destdir fmode'
Overwrite -> catchIOError (createDirectory destdir
fmode')
$ \e ->
case ioeGetErrorType e of
AlreadyExists -> setFileMode destdir
fmode'
_ -> ioError e
return contents
-- create the destination dir and
-- only return contents if we succeed
handleIOE (CreateDirFailed from destdir) ce [] $ do
fmode' <- PF.fileMode <$> PF.getSymbolicLinkStatus from
case cm of
Strict -> createDirectory destdir fmode'
Overwrite -> catchIOError (createDirectory destdir fmode') $ \e ->
case ioeGetErrorType e of
AlreadyExists -> setFileMode destdir fmode'
_ -> ioError e
return contents
-- NOTE: we can't use `easyCopy` here, because we want to call `go`
-- recursively to skip the top-level sanity checks
-- NOTE: we can't use `easyCopy` here, because we want to call `go`
-- recursively to skip the top-level sanity checks
-- if reading the contents and creating the destination dir worked,
-- then copy the contents to the destination too
for_ contents $ \f -> do
ftype <- getFileType f
newdest <- (destdir </>) <$> basename f
case ftype of
SymbolicLink -> handleIOE (RecreateSymlinkFailed f newdest) ce ()
$ recreateSymlink f newdest cm
Directory -> go ce f newdest
RegularFile -> handleIOE (CopyFileFailed f newdest) ce ()
$ copyFile f newdest cm
_ -> return ()
-- if reading the contents and creating the destination dir worked,
-- then copy the contents to the destination too
for_ contents $ \f -> do
ftype <- getFileType f
newdest <- (destdir </>) <$> basename f
case ftype of
SymbolicLink ->
handleIOE (RecreateSymlinkFailed f newdest) ce ()
$ recreateSymlink f newdest cm
Directory -> go ce f newdest
RegularFile ->
handleIOE (CopyFileFailed f newdest) ce () $ copyFile f newdest cm
_ -> return ()
-- helper to handle errors for both RecursiveErrorModes and return a
-- default value
handleIOE :: RecursiveFailureHint
-> IORef [(RecursiveFailureHint, IOException)]
-> a -> IO a -> IO a
handleIOE hint ce def = case rm of
FailEarly -> handleIOError throwIO
CollectFailures -> handleIOError (\e -> modifyIORef ce ((hint, e):)
>> return def)
-- helper to handle errors for both RecursiveErrorModes and return a
-- default value
handleIOE :: RecursiveFailureHint
-> IORef [(RecursiveFailureHint, IOException)]
-> a
-> IO a
-> IO a
handleIOE hint ce def = case rm of
FailEarly -> handleIOError throwIO
CollectFailures ->
handleIOError (\e -> modifyIORef ce ((hint, e) :) >> return def)
-- |Recreate a symlink.
@@ -473,21 +428,20 @@ recreateSymlink :: RawFilePath -- ^ the old symlink file
-> RawFilePath -- ^ destination file
-> CopyMode
-> IO ()
recreateSymlink symsource newsym cm
= do
throwSameFile symsource newsym
sympoint <- readSymbolicLink symsource
case cm of
Strict -> return ()
Overwrite -> do
writable <- do
e <- doesExist newsym
if e then isWritable newsym else pure False
isfile <- doesFileExist newsym
isdir <- doesDirectoryExist newsym
when (writable && isfile) (deleteFile newsym)
when (writable && isdir) (deleteDir newsym)
createSymbolicLink sympoint newsym
recreateSymlink symsource newsym cm = do
throwSameFile symsource newsym
sympoint <- readSymbolicLink symsource
case cm of
Strict -> return ()
Overwrite -> do
writable <- do
e <- doesExist newsym
if e then isWritable newsym else pure False
isfile <- doesFileExist newsym
isdir <- doesDirectoryExist newsym
when (writable && isfile) (deleteFile newsym)
when (writable && isdir) (deleteDir newsym)
createSymbolicLink sympoint newsym
-- |Copies the given regular file to the given destination.
@@ -534,34 +488,44 @@ copyFile :: RawFilePath -- ^ source file
-> IO ()
copyFile from to cm = do
throwSameFile from to
bracket (do
fd <- openFd from SPI.ReadOnly [SPDF.oNofollow] Nothing
handle <- SPI.fdToHandle fd
pure (fd, handle))
(\(_, handle) -> SIO.hClose handle)
bracket
(do
fd <- openFd from SPI.ReadOnly [SPDF.oNofollow] Nothing
handle <- SPI.fdToHandle fd
pure (fd, handle)
)
(\(_, handle) -> SIO.hClose handle)
$ \(fromFd, fH) -> do
sourceFileMode <- System.Posix.Files.ByteString.fileMode <$> getFdStatus fromFd
let dflags = [SPDF.oNofollow, case cm of
Strict -> SPDF.oExcl
Overwrite -> SPDF.oTrunc]
bracketeer (do
fd <- openFd to SPI.WriteOnly dflags $ Just sourceFileMode
handle <- SPI.fdToHandle fd
pure (fd, handle))
(\(_, handle) -> SIO.hClose handle)
(\(_, handle) -> do
SIO.hClose handle
case cm of
-- if we created the file and copying failed, it's
-- safe to clean up
Strict -> deleteFile to
Overwrite -> pure ())
$ \(_, tH) -> do
SIO.hSetBinaryMode fH True
SIO.hSetBinaryMode tH True
streamlyCopy (fH, tH)
where
streamlyCopy (fH, tH) = S.fold (FH.writeChunks tH) $ IFH.toChunksWithBufferOf (256*1024) fH
sourceFileMode <- System.Posix.Files.ByteString.fileMode
<$> getFdStatus fromFd
let dflags =
[ SPDF.oNofollow
, case cm of
Strict -> SPDF.oExcl
Overwrite -> SPDF.oTrunc
]
bracketeer
(do
fd <- openFd to SPI.WriteOnly dflags $ Just sourceFileMode
handle <- SPI.fdToHandle fd
pure (fd, handle)
)
(\(_, handle) -> SIO.hClose handle)
(\(_, handle) -> do
SIO.hClose handle
case cm of
-- if we created the file and copying failed, it's
-- safe to clean up
Strict -> deleteFile to
Overwrite -> pure ()
)
$ \(_, tH) -> do
SIO.hSetBinaryMode fH True
SIO.hSetBinaryMode tH True
streamlyCopy (fH, tH)
where
streamlyCopy (fH, tH) =
S.fold (FH.writeChunks tH) $ IFH.toChunksWithBufferOf (256 * 1024) fH
-- |Copies a regular file, directory or symbolic link. In case of a
-- symbolic link it is just recreated, even if it points to a directory.
@@ -581,10 +545,10 @@ easyCopy :: RawFilePath
easyCopy from to cm rm = do
ftype <- getFileType from
case ftype of
SymbolicLink -> recreateSymlink from to cm
RegularFile -> copyFile from to cm
Directory -> copyDirRecursive from to cm rm
_ -> return ()
SymbolicLink -> recreateSymlink from to cm
RegularFile -> copyFile from to cm
Directory -> copyDirRecursive from to cm rm
_ -> return ()
@@ -644,19 +608,16 @@ deleteDir = removeDirectory
-- - `NoSuchThing` if directory does not exist
-- - `PermissionDenied` if we can't open or write to parent directory
deleteDirRecursive :: RawFilePath -> IO ()
deleteDirRecursive p =
catchErrno [eNOTEMPTY, eEXIST]
(deleteDir p)
$ do
files <- getDirsFiles p
for_ files $ \file -> do
ftype <- getFileType file
case ftype of
SymbolicLink -> deleteFile file
Directory -> deleteDirRecursive file
RegularFile -> deleteFile file
_ -> return ()
removeDirectory p
deleteDirRecursive p = catchErrno [eNOTEMPTY, eEXIST] (deleteDir p) $ do
files <- getDirsFiles p
for_ files $ \file -> do
ftype <- getFileType file
case ftype of
SymbolicLink -> deleteFile file
Directory -> deleteDirRecursive file
RegularFile -> deleteFile file
_ -> return ()
removeDirectory p
-- |Deletes a file, directory or symlink.
@@ -687,18 +648,16 @@ easyDelete p = do
-- |Opens a file appropriately by invoking xdg-open. The file type
-- is not checked. This forks a process.
openFile :: RawFilePath
-> IO ProcessID
openFile fp =
SPP.forkProcess $ SPP.executeFile "xdg-open" True [fp] Nothing
openFile :: RawFilePath -> IO ProcessID
openFile fp = SPP.forkProcess
$ SPP.executeFile (UTF8.fromString "xdg-open") True [fp] Nothing
-- |Executes a program with the given arguments. This forks a process.
executeFile :: RawFilePath -- ^ program
-> [ByteString] -- ^ arguments
-> IO ProcessID
executeFile fp args =
SPP.forkProcess $ SPP.executeFile fp True args Nothing
executeFile fp args = SPP.forkProcess $ SPP.executeFile fp True args Nothing
@@ -718,11 +677,14 @@ executeFile fp args =
-- - `NoSuchThing` if any of the parent components of the path
-- do not exist
createRegularFile :: FileMode -> RawFilePath -> IO ()
createRegularFile fm destBS =
bracket (SPI.openFd destBS SPI.WriteOnly (Just fm)
(SPI.defaultFileFlags { exclusive = True }))
SPI.closeFd
(\_ -> return ())
createRegularFile fm destBS = bracket
(SPI.openFd destBS
SPI.WriteOnly
(Just fm)
(SPI.defaultFileFlags { exclusive = True })
)
SPI.closeFd
(\_ -> return ())
-- |Create an empty directory at the given directory with the given filename.
@@ -769,18 +731,21 @@ createDirIfMissing fm destBS =
--
-- Note: calls `getcwd` if the input path is a relative path
createDirRecursive :: FileMode -> RawFilePath -> IO ()
createDirRecursive fm p =
go p
where
go :: RawFilePath -> IO ()
go dest = do
catchIOError (createDirectory dest fm) $ \e -> do
errno <- getErrno
case errno of
en | en == eEXIST -> unlessM (doesDirectoryExist dest) (ioError e)
| en == eNOENT -> createDirRecursive fm (takeDirectory dest)
>> createDirectory dest fm
| otherwise -> ioError e
createDirRecursive fm p = go p
where
go :: RawFilePath -> IO ()
go dest = do
catchIOError (createDirectory dest fm) $ \e -> do
errno <- getErrno
case errno of
en
| en == eEXIST
-> unlessM (doesDirectoryExist dest) (ioError e)
| en == eNOENT
-> createDirRecursive fm (takeDirectory dest)
>> createDirectory dest fm
| otherwise
-> ioError e
-- |Create a symlink.
@@ -796,8 +761,7 @@ createDirRecursive fm p =
createSymlink :: RawFilePath -- ^ destination file
-> RawFilePath -- ^ path the symlink points to
-> IO ()
createSymlink destBS sympoint
= createSymbolicLink sympoint destBS
createSymlink destBS sympoint = createSymbolicLink sympoint destBS
@@ -875,13 +839,13 @@ moveFile from to cm = do
throwSameFile from to
case cm of
Strict -> catchErrno [eXDEV] (renameFile from to) $ do
easyCopy from to Strict FailEarly
easyDelete from
easyCopy from to Strict FailEarly
easyDelete from
Overwrite -> do
ft <- getFileType from
ft <- getFileType from
writable <- do
e <- doesFileExist to
if e then isWritable to else pure False
e <- doesFileExist to
if e then isWritable to else pure False
case ft of
RegularFile -> do
@@ -936,12 +900,12 @@ readFile path = do
-- - `PermissionDenied` if we cannot read the file or the directory
-- containting it
-- - `NoSuchThing` if the file does not exist
readFileStream :: RawFilePath
-> IO (SerialT IO ByteString)
readFileStream :: RawFilePath -> IO (SerialT IO ByteString)
readFileStream fp = do
fd <- openFd fp SPI.ReadOnly [] Nothing
fd <- openFd fp SPI.ReadOnly [] Nothing
handle <- SPI.fdToHandle fd
let stream = fmap fromArray (S.unfold (SU.finally SIO.hClose FH.readChunks) handle)
let stream =
fmap fromArray (S.unfold (SU.finally SIO.hClose FH.readChunks) handle)
pure stream
@@ -966,7 +930,8 @@ writeFile :: RawFilePath
-> ByteString
-> IO ()
writeFile fp fmode bs =
bracket (openFd fp SPI.WriteOnly [SPDF.oTrunc] fmode) (SPI.closeFd) $ \fd -> void $ SPB.fdWrite fd bs
bracket (openFd fp SPI.WriteOnly [SPDF.oTrunc] fmode) (SPI.closeFd)
$ \fd -> void $ SPB.fdWrite fd bs
-- |Write a given lazy ByteString to a file, truncating the file beforehand.
@@ -985,10 +950,11 @@ writeFileL :: RawFilePath
-> L.ByteString
-> IO ()
writeFileL fp fmode lbs = do
handle <- bracketOnError (openFd fp SPI.WriteOnly [SPDF.oTrunc] fmode) (SPI.closeFd) $ SPI.fdToHandle
handle <-
bracketOnError (openFd fp SPI.WriteOnly [SPDF.oTrunc] fmode) (SPI.closeFd)
$ SPI.fdToHandle
finally (streamlyCopy handle) (SIO.hClose handle)
where
streamlyCopy tH = S.fold (FH.writeChunks tH) $ SL.toChunks lbs
where streamlyCopy tH = S.fold (FH.writeChunks tH) $ SL.toChunks lbs
-- |Append a given ByteString to a file.
@@ -1002,8 +968,8 @@ writeFileL fp fmode lbs = do
-- - `NoSuchThing` if the file does not exist
appendFile :: RawFilePath -> ByteString -> IO ()
appendFile fp bs =
bracket (openFd fp SPI.WriteOnly [SPDF.oAppend] Nothing)
(SPI.closeFd) $ \fd -> void $ SPB.fdWrite fd bs
bracket (openFd fp SPI.WriteOnly [SPDF.oAppend] Nothing) (SPI.closeFd)
$ \fd -> void $ SPB.fdWrite fd bs
@@ -1015,8 +981,8 @@ appendFile fp bs =
-- |Default permissions for a new file.
newFilePerms :: FileMode
newFilePerms
= ownerWriteMode
newFilePerms =
ownerWriteMode
`unionFileModes` ownerReadMode
`unionFileModes` groupWriteMode
`unionFileModes` groupReadMode
@@ -1026,8 +992,8 @@ newFilePerms
-- |Default permissions for a new directory.
newDirPerms :: FileMode
newDirPerms
= ownerModes
newDirPerms =
ownerModes
`unionFileModes` groupExecuteMode
`unionFileModes` groupReadMode
`unionFileModes` otherExecuteMode
@@ -1047,9 +1013,12 @@ newDirPerms
-- Only eNOENT is catched (and returns False).
doesExist :: RawFilePath -> IO Bool
doesExist bs =
catchErrno [eNOENT] (do
_ <- PF.getSymbolicLinkStatus bs
return $ True)
catchErrno
[eNOENT]
(do
_ <- PF.getSymbolicLinkStatus bs
return $ True
)
$ return False
@@ -1059,9 +1028,12 @@ doesExist bs =
-- Only eNOENT is catched (and returns False).
doesFileExist :: RawFilePath -> IO Bool
doesFileExist bs =
catchErrno [eNOENT] (do
fs <- PF.getSymbolicLinkStatus bs
return $ not . PF.isDirectory $ fs)
catchErrno
[eNOENT]
(do
fs <- PF.getSymbolicLinkStatus bs
return $ not . PF.isDirectory $ fs
)
$ return False
@@ -1071,9 +1043,12 @@ doesFileExist bs =
-- Only eNOENT is catched (and returns False).
doesDirectoryExist :: RawFilePath -> IO Bool
doesDirectoryExist bs =
catchErrno [eNOENT] (do
fs <- PF.getSymbolicLinkStatus bs
return $ PF.isDirectory fs)
catchErrno
[eNOENT]
(do
fs <- PF.getSymbolicLinkStatus bs
return $ PF.isDirectory fs
)
$ return False
@@ -1113,12 +1088,9 @@ isExecutable bs = fileAccess bs False False True
-- |Checks whether the directory at the given path exists and can be
-- opened. This invokes `openDirStream` which follows symlinks.
canOpenDirectory :: RawFilePath -> IO Bool
canOpenDirectory bs =
handleIOError (\_ -> return False) $ do
bracket (openDirStream bs)
closeDirStream
(\_ -> return ())
return True
canOpenDirectory bs = handleIOError (\_ -> return False) $ do
bracket (openDirStream bs) closeDirStream (\_ -> return ())
return True
@@ -1176,12 +1148,10 @@ getDirsFiles p = do
getDirsFiles' :: RawFilePath -- ^ dir to read
-> IO [RawFilePath]
getDirsFiles' fp = do
fd <- openFd fp SPI.ReadOnly [SPDF.oNofollow] Nothing
fd <- openFd fp SPI.ReadOnly [SPDF.oNofollow] Nothing
rawContents <- getDirectoryContents' fd
fmap catMaybes $ for rawContents $ \(_, f) ->
if FP.isSpecialDirectoryEntry f
then pure Nothing
else pure $ Just f
if FP.isSpecialDirectoryEntry f then pure Nothing else pure $ Just f
@@ -1202,16 +1172,15 @@ getFileType :: RawFilePath -> IO FileType
getFileType fp = do
fs <- PF.getSymbolicLinkStatus fp
decide fs
where
decide fs
| PF.isDirectory fs = return Directory
| PF.isRegularFile fs = return RegularFile
| PF.isSymbolicLink fs = return SymbolicLink
| PF.isBlockDevice fs = return BlockDevice
| PF.isCharacterDevice fs = return CharacterDevice
| PF.isNamedPipe fs = return NamedPipe
| PF.isSocket fs = return Socket
| otherwise = ioError $ userError "No filetype?!"
where
decide fs | PF.isDirectory fs = return Directory
| PF.isRegularFile fs = return RegularFile
| PF.isSymbolicLink fs = return SymbolicLink
| PF.isBlockDevice fs = return BlockDevice
| PF.isCharacterDevice fs = return CharacterDevice
| PF.isNamedPipe fs = return NamedPipe
| PF.isSocket fs = return Socket
| otherwise = ioError $ userError "No filetype?!"
@@ -1243,4 +1212,3 @@ toAbs bs = do
False -> do
cwd <- getWorkingDirectory
return $ cwd </> bs