diff --git a/lib/terminal.go b/lib/terminal.go
new file mode 100644
index 0000000..1e33bb1
--- /dev/null
+++ b/lib/terminal.go
@@ -0,0 +1,93 @@
+package lib
+
+import (
+	"errors"
+	"os/exec"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"veyron2/vlog"
+)
+
+// Used with ioctl TIOCGWINSZ and TIOCSWINSZ.
+type Winsize struct {
+	Row    uint16
+	Col    uint16
+	Xpixel uint16
+	Ypixel uint16
+}
+
+// SetWindowSize sets the terminal's window size.
+func SetWindowSize(fd uintptr, ws Winsize) error {
+	vlog.Infof("Setting window size: %v", ws)
+	ret, _, _ := syscall.Syscall(
+		syscall.SYS_IOCTL,
+		fd,
+		uintptr(syscall.TIOCSWINSZ),
+		uintptr(unsafe.Pointer(&ws)))
+	if int(ret) == -1 {
+		return errors.New("ioctl(TIOCSWINSZ) failed")
+	}
+	return nil
+}
+
+// GetWindowSize gets the terminal's window size.
+func GetWindowSize() (*Winsize, error) {
+	ws := &Winsize{}
+	ret, _, _ := syscall.Syscall(
+		syscall.SYS_IOCTL,
+		uintptr(syscall.Stdin),
+		uintptr(syscall.TIOCGWINSZ),
+		uintptr(unsafe.Pointer(ws)))
+	if int(ret) == -1 {
+		return nil, errors.New("ioctl(TIOCGWINSZ) failed")
+	}
+	return ws, nil
+}
+
+func EnterRawTerminalMode() string {
+	var savedBytes []byte
+	var err error
+	if savedBytes, err = exec.Command("stty", "-F", "/dev/tty", "-g").Output(); err != nil {
+		vlog.Infof("Failed to save terminal settings: %q (%v)", savedBytes, err)
+	}
+	saved := strings.TrimSpace(string(savedBytes))
+
+	args := []string{
+		"-F", "/dev/tty",
+		// Don't buffer stdin. Read characters as they are typed.
+		"-icanon", "min", "1", "time", "0",
+		// Turn off local echo of input characters.
+		"-echo", "-echoe", "-echok", "-echonl",
+		// Disable interrupt, quit, and suspend special characters.
+		"-isig",
+		// Ignore characters with parity errors.
+		"ignpar",
+		// Disable translate newline to carriage return.
+		"-inlcr",
+		// Disable ignore carriage return.
+		"-igncr",
+		// Disable translate carriage return to newline.
+		"-icrnl",
+		// Disable flow control.
+		"-ixon", "-ixany", "-ixoff",
+		// Disable non-POSIX special characters.
+		"-iexten",
+	}
+	if out, err := exec.Command("stty", args...).CombinedOutput(); err != nil {
+		vlog.Infof("stty failed (%v) (%q)", err, out)
+	}
+
+	return string(saved)
+}
+
+func RestoreTerminalSettings(saved string) {
+	args := []string{
+		"-F", "/dev/tty",
+		saved,
+	}
+	if out, err := exec.Command("stty", args...).CombinedOutput(); err != nil {
+		vlog.Infof("stty failed (%v) (%q)", err, out)
+	}
+}