unix-2.6.0.1: POSIX functionality

Portabilitynon-portable (requires POSIX)
Stabilityprovisional
Maintainer[email protected]
Safe HaskellTrustworthy

System.Posix.Terminal

Contents

Description

POSIX Terminal support

Synopsis

Terminal support

Terminal attributes

getTerminalAttributes :: Fd -> IO TerminalAttributesSource

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

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.

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.

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.

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 ProcessGroupIDSource

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 BoolSource

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

getTerminalName :: Fd -> IO FilePathSource

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 FilePathSource

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 FilePathSource

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.