Add support for macOS

exhibit/terminal.go

@@ -1,8 +1,6 @@
 package exhibit
 
 import (
-	"golang.org/x/sys/unix"
-
 	"bytes"
 	"fmt"
 	"io"
@@ -11,6 +9,8 @@ import (
 	"sync"
 	"time"
 	"unicode/utf8"
+
+	"golang.org/x/sys/unix"
 )
 
 const (
@@ -69,7 +69,7 @@ func Init() *Terminal {
 		log.Panic(err)
 	}
 
-	termios, err := unix.IoctlGetTermios(int(out.Fd()), unix.TCGETS)
+	termios, err := unix.IoctlGetTermios(int(out.Fd()), ioctlReadTermios)
 	if err != nil {
 		out.Close()
 		in.Close()
@@ -408,7 +408,7 @@ func (t *Terminal) enterRaw() {
 	termios.Cc[unix.VMIN] = 1
 	termios.Cc[unix.VTIME] = 0
 
-	err := unix.IoctlSetTermios(t.outFd(), unix.TCSETS, &termios)
+	err := unix.IoctlSetTermios(t.outFd(), ioctlWriteTermios, &termios)
 	if err != nil {
 		t.exitAlt()
 		t.out.Close()
@@ -418,7 +418,7 @@ func (t *Terminal) enterRaw() {
 }
 
 func (t *Terminal) exitRaw() {
-	err := unix.IoctlSetTermios(t.outFd(), unix.TCSETS, &t.termios)
+	err := unix.IoctlSetTermios(t.outFd(), ioctlWriteTermios, &t.termios)
 	if err != nil {
 		t.out.Close()
 		t.in.Close()

exhibit/termios_bsd.go

@@ -0,0 +1,10 @@
+// +build darwin freebsd netbsd openbsd
+
+package exhibit
+
+import (
+	"syscall"
+)
+
+const ioctlReadTermios = syscall.TIOCGETA
+const ioctlWriteTermios = syscall.TIOCSETA

exhibit/termios_linux.go

@@ -0,0 +1,10 @@
+// +build linux
+
+package exhibit
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+const ioctlReadTermios = unix.TCGETS
+const ioctlWriteTermios = unix.TCSETS