GHC.IO.FD

Raw read/write operations on file descriptors

Documentation

data FD

Constructors

FD

Fields

• fdFD :: !CInt
• fdIsNonBlocking :: !Int

Instances

BufferedIO FD

Since: base-4.1.0.0

Defined in GHC.IO.FD

Methods

newBuffer :: FD -> BufferState -> IO (Buffer Word8)

fillReadBuffer :: FD -> Buffer Word8 -> IO (Int, Buffer Word8)

fillReadBuffer0 :: FD -> Buffer Word8 -> IO (Maybe Int, Buffer Word8)

emptyWriteBuffer :: FD -> Buffer Word8 -> IO (Buffer Word8)

flushWriteBuffer :: FD -> Buffer Word8 -> IO (Buffer Word8)

flushWriteBuffer0 :: FD -> Buffer Word8 -> IO (Int, Buffer Word8)

IODevice FD

Since: base-4.1.0.0

Defined in GHC.IO.FD

Methods

ready :: FD -> Bool -> Int -> IO Bool

close :: FD -> IO ()

isTerminal :: FD -> IO Bool

isSeekable :: FD -> IO Bool

seek :: FD -> SeekMode -> Integer -> IO Integer

tell :: FD -> IO Integer

getSize :: FD -> IO Integer

setSize :: FD -> Integer -> IO ()

setEcho :: FD -> Bool -> IO ()

getEcho :: FD -> IO Bool

setRaw :: FD -> Bool -> IO ()

devType :: FD -> IO IODeviceType

dup :: FD -> IO FD

dup2 :: FD -> FD -> IO FD

RawIO FD

Since: base-4.1.0.0

Defined in GHC.IO.FD

Methods

read :: FD -> Ptr Word8 -> Word64 -> Int -> IO Int

readNonBlocking :: FD -> Ptr Word8 -> Word64 -> Int -> IO (Maybe Int)

write :: FD -> Ptr Word8 -> Word64 -> Int -> IO ()

writeNonBlocking :: FD -> Ptr Word8 -> Word64 -> Int -> IO Int

Show FD

Since: base-4.1.0.0

Defined in GHC.IO.FD

Methods

showsPrec :: Int -> FD -> ShowS

show :: FD -> String

showList :: [FD] -> ShowS

openFile

Arguments

:: FilePath

file to open

-> IOMode

mode in which to open the file

-> Bool

open the file in non-blocking mode?

-> IO (FD, IODeviceType)

Open a file and make an FD for it. Truncates the file to zero size when the IOMode is WriteMode.

mkFD

Arguments

:: CInt

-> IOMode

-> Maybe (IODeviceType, CDev, CIno)

-> Bool

is a socket (on Windows)

-> Bool

is in non-blocking mode on Unix

-> IO (FD, IODeviceType)

Make a FD from an existing file descriptor. Fails if the FD refers to a directory. If the FD refers to a file, mkFD locks the file according to the Haskell 2010 single writer/multiple reader locking semantics (this is why we need the IOMode argument too).

release :: FD -> IO ()

setNonBlockingMode :: FD -> Bool -> IO FD

readRawBufferPtr :: String -> FD -> Ptr Word8 -> Int -> CSize -> IO Int

readRawBufferPtrNoBlock :: String -> FD -> Ptr Word8 -> Int -> CSize -> IO Int

writeRawBufferPtr :: String -> FD -> Ptr Word8 -> Int -> CSize -> IO CInt

stdin :: FD

stdout :: FD

stderr :: FD