Terminal support

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

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.

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

Throws IOError ("unsupported operation") if platform does not provide tcdrain(3) (use #if HAVE_TCDRAIN CPP guard to detect availability).

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

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

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

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

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

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 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.

Throws IOError ("unsupported operation") if platform does not provide ctermid(3) (use #if HAVE_CTERMID CPP guard to detect availability).

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

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.