FlushInput discards data written to a file descriptor but not read.

GetWinsize queries the size of the terminal referenced by the given file.

Ioctl wraps the ioctl syscall.

IsATTY returns true if the given file is a terminal.

NewTermiosFromFd extracts the terminal attribute of the given file descriptor.

WaitForRead blocks until any of the given files is ready to be read.

SIGWINCH is the Window size change signal.

Termios represents terminal attributes.