Terminal support

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

setTerminalAttributes fd attr ts calls tcsetattr to change the TerminalAttributes associated with Fdfd 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 Fdfd for the specified implementation-dependent duration.

drainOutput fd calls tcdrain to block until all output written to Fdfd 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 Fdfd, as indicated by the QueueSelectorqueues.

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

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

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

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

getTerminalName fd calls ttyname to obtain a name associated with the terminal for Fdfd. 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.