boot v2 progress: disks, ssh, success...

tty.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+var (
+	stdinTTY = &tty{int(os.Stdin.Fd()), nil}
+)
+
+type tty struct {
+	fd      int
+	termios *unix.Termios
+}
+
+func (t *tty) EchoOff() {
+	termios, err := unix.IoctlGetTermios(t.fd, unix.TCGETS)
+	if err != nil {
+		return
+	}
+
+	t.termios = termios
+
+	newState := *termios
+	newState.Lflag &^= unix.ECHO
+	newState.Lflag |= unix.ICANON | unix.ISIG
+	newState.Iflag |= unix.ICRNL
+	unix.IoctlSetTermios(t.fd, unix.TCSETS, &newState)
+}
+
+func (t *tty) Restore() {
+	if t.termios != nil {
+		unix.IoctlSetTermios(t.fd, unix.TCSETS, t.termios)
+		t.termios = nil
+	}
+}