func (o *StreamOptions) setupTTY() term.TTY { t := term.TTY{ Parent: o.InterruptParent, Out: o.Out, } if !o.Stdin { // need to nil out o.In to make sure we don't create a stream for stdin o.In = nil o.TTY = false return t } t.In = o.In if !o.TTY { return t } if o.isTerminalIn == nil { o.isTerminalIn = func(tty term.TTY) bool { return tty.IsTerminalIn() } } if !o.isTerminalIn(t) { o.TTY = false if o.Err != nil { fmt.Fprintln(o.Err, "Unable to use a TTY - input is not a terminal or the right kind of file") } return t } // if we get to here, the user wants to attach stdin, wants a TTY, and o.In is a terminal, so we // can safely set t.Raw to true t.Raw = true if o.overrideStreams == nil { // use dockerterm.StdStreams() to get the right I/O handles on Windows o.overrideStreams = dockerterm.StdStreams } stdin, stdout, _ := o.overrideStreams() o.In = stdin t.In = stdin if o.Out != nil { o.Out = stdout t.Out = stdout } return t }