unix-2.4.0.1: POSIX functionality Source code Contents Index

System.Posix.Terminal Portability non-portable (requires POSIX) Stability provisional Maintainer libraries@haskell.org

Contents Terminal support Terminal attributes Terminal operations Process groups Testing a file descriptor Pseudoterminal operations

Description

POSIX Terminal support

Synopsis

data TerminalAttributes getTerminalAttributes :: Fd -> IO TerminalAttributes data TerminalState = Immediately | WhenDrained | WhenFlushed setTerminalAttributes :: Fd -> TerminalAttributes -> TerminalState -> IO () data TerminalMode = InterruptOnBreak | MapCRtoLF | IgnoreBreak | IgnoreCR | IgnoreParityErrors | MapLFtoCR | CheckParity | StripHighBit | StartStopInput | StartStopOutput | MarkParityErrors | ProcessOutput | LocalMode | ReadEnable | TwoStopBits | HangupOnClose | EnableParity | OddParity | EnableEcho | EchoErase | EchoKill | EchoLF | ProcessInput | ExtendedFunctions | KeyboardInterrupts | NoFlushOnInterrupt | BackgroundWriteInterrupt withoutMode :: TerminalAttributes -> TerminalMode -> TerminalAttributes withMode :: TerminalAttributes -> TerminalMode -> TerminalAttributes terminalMode :: TerminalMode -> TerminalAttributes -> Bool bitsPerByte :: TerminalAttributes -> Int withBits :: TerminalAttributes -> Int -> TerminalAttributes data ControlCharacter = EndOfFile | EndOfLine | Erase | Interrupt | Kill | Quit | Start | Stop | Suspend controlChar :: TerminalAttributes -> ControlCharacter -> Maybe Char withCC :: TerminalAttributes -> (ControlCharacter, Char) -> TerminalAttributes withoutCC :: TerminalAttributes -> ControlCharacter -> TerminalAttributes inputTime :: TerminalAttributes -> Int withTime :: TerminalAttributes -> Int -> TerminalAttributes minInput :: TerminalAttributes -> Int withMinInput :: TerminalAttributes -> Int -> TerminalAttributes data BaudRate = B0 | B50 | B75 | B110 | B134 | B150 | B200 | B300 | B600 | B1200 | B1800 | B2400 | B4800 | B9600 | B19200 | B38400 | B57600 | B115200 inputSpeed :: TerminalAttributes -> BaudRate withInputSpeed :: TerminalAttributes -> BaudRate -> TerminalAttributes outputSpeed :: TerminalAttributes -> BaudRate withOutputSpeed :: TerminalAttributes -> BaudRate -> TerminalAttributes sendBreak :: Fd -> Int -> IO () drainOutput :: Fd -> IO () data QueueSelector = InputQueue | OutputQueue | BothQueues discardData :: Fd -> QueueSelector -> IO () data FlowAction = SuspendOutput | RestartOutput | TransmitStop | TransmitStart controlFlow :: Fd -> FlowAction -> IO () getTerminalProcessGroupID :: Fd -> IO ProcessGroupID setTerminalProcessGroupID :: Fd -> ProcessGroupID -> IO () queryTerminal :: Fd -> IO Bool getTerminalName :: Fd -> IO FilePath getControllingTerminalName :: IO FilePath openPseudoTerminal :: IO (Fd, Fd) getSlaveTerminalName :: Fd -> IO FilePath

Terminal support

Terminal attributes

data TerminalAttributes Source

getTerminalAttributes :: Fd -> IO TerminalAttributes Source

getTerminalAttributes fd calls tcgetattr to obtain the TerminalAttributes associated with Fd fd.

data TerminalState Source

Constructors Immediately WhenDrained WhenFlushed

setTerminalAttributes :: Fd -> TerminalAttributes -> TerminalState -> IO () Source

setTerminalAttributes fd attr ts calls tcsetattr to change the TerminalAttributes associated with Fd fd to attr, when the terminal is in the state indicated by ts.

data TerminalMode Source

Constructors InterruptOnBreak MapCRtoLF IgnoreBreak IgnoreCR IgnoreParityErrors MapLFtoCR CheckParity StripHighBit StartStopInput StartStopOutput MarkParityErrors ProcessOutput LocalMode ReadEnable TwoStopBits HangupOnClose EnableParity OddParity EnableEcho EchoErase EchoKill EchoLF ProcessInput ExtendedFunctions KeyboardInterrupts NoFlushOnInterrupt BackgroundWriteInterrupt

withoutMode :: TerminalAttributes -> TerminalMode -> TerminalAttributes Source

withMode :: TerminalAttributes -> TerminalMode -> TerminalAttributes Source

terminalMode :: TerminalMode -> TerminalAttributes -> Bool Source

bitsPerByte :: TerminalAttributes -> Int Source

withBits :: TerminalAttributes -> Int -> TerminalAttributes Source

data ControlCharacter Source

Constructors EndOfFile EndOfLine Erase Interrupt Kill Quit Start Stop Suspend

controlChar :: TerminalAttributes -> ControlCharacter -> Maybe Char Source

withCC :: TerminalAttributes -> (ControlCharacter, Char) -> TerminalAttributes Source

withoutCC :: TerminalAttributes -> ControlCharacter -> TerminalAttributes Source

inputTime :: TerminalAttributes -> Int Source

withTime :: TerminalAttributes -> Int -> TerminalAttributes Source

minInput :: TerminalAttributes -> Int Source

withMinInput :: TerminalAttributes -> Int -> TerminalAttributes Source

data BaudRate Source

Constructors B0 B50 B75 B110 B134 B150 B200 B300 B600 B1200 B1800 B2400 B4800 B9600 B19200 B38400 B57600 B115200

inputSpeed :: TerminalAttributes -> BaudRate Source

withInputSpeed :: TerminalAttributes -> BaudRate -> TerminalAttributes Source

outputSpeed :: TerminalAttributes -> BaudRate Source

withOutputSpeed :: TerminalAttributes -> BaudRate -> TerminalAttributes Source

Terminal operations

sendBreak :: Fd -> Int -> IO () Source

sendBreak fd duration calls tcsendbreak to transmit a continuous stream of zero-valued bits on Fd fd for the specified implementation-dependent duration.

drainOutput :: Fd -> IO () Source

drainOutput fd calls tcdrain to block until all output written to Fd fd has been transmitted.

data QueueSelector Source

Constructors InputQueue OutputQueue BothQueues

discardData :: Fd -> QueueSelector -> IO () Source

discardData fd queues calls tcflush to discard pending input and/or output for Fd fd, as indicated by the QueueSelector queues.

data FlowAction Source

Constructors SuspendOutput TCOOFF RestartOutput TCOON TransmitStop TCIOFF TransmitStart TCION

controlFlow :: Fd -> FlowAction -> IO () Source

controlFlow fd action calls tcflow to control the flow of data on Fd fd, as indicated by action.

Process groups

getTerminalProcessGroupID :: Fd -> IO ProcessGroupID Source

getTerminalProcessGroupID fd calls tcgetpgrp to obtain the ProcessGroupID of the foreground process group associated with the terminal attached to Fd fd.

setTerminalProcessGroupID :: Fd -> ProcessGroupID -> IO () Source

setTerminalProcessGroupID fd pgid calls tcsetpgrp to set the ProcessGroupID of the foreground process group associated with the terminal attached to Fd fd to pgid.

Testing a file descriptor

queryTerminal :: Fd -> IO Bool Source

queryTerminal fd calls isatty to determine whether or not Fd fd is associated with a terminal.

getTerminalName :: Fd -> IO FilePath Source

getTerminalName fd calls ttyname to obtain a name associated with the terminal for Fd fd. If fd is associated with a terminal, getTerminalName returns the name of the terminal.

getControllingTerminalName :: IO FilePath Source

getControllingTerminalName calls ctermid to obtain a name associated with the controlling terminal for the process. If a controlling terminal exists, getControllingTerminalName returns the name of the controlling terminal.

Pseudoterminal operations

openPseudoTerminal :: IO (Fd, Fd) Source

openPseudoTerminal creates a pseudoterminal (pty) pair, and returns the newly created pair as a (master, slave) tuple.

getSlaveTerminalName :: Fd -> IO FilePath Source

getSlaveTerminalName calls ptsname to obtain the name of the slave terminal associated with a pseudoterminal pair. The file descriptor to pass in must be that of the master.

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