diff --git a/starainrt.go b/starainrt.go
index ebf7750..582034b 100644
--- a/starainrt.go
+++ b/starainrt.go
@@ -21,8 +21,10 @@ import (
 	"os"
 	"os/exec"
 	"regexp"
+	"runtime"
 	"strconv"
 	"strings"
+	"syscall"
 	"time"
 )
 
@@ -985,3 +987,45 @@ func (this suncli) WriteCmd(cmdstr string) {
 	this.infile.Write([]byte(cmdstr + "\n"))
 	return
 }
+
+func (this suncli) ExitCode() int {
+	return this.cmd.ProcessState.Sys().(syscall.WaitStatus).ExitStatus()
+}
+
+func MsgBox(text, defaults string) string {
+	var input string
+	input = defaults
+	fmt.Print(text)
+	fmt.Scanln(&input)
+	return strings.TrimSpace(input)
+}
+
+func MessageBox(text, defaults string) string {
+	fmt.Print(text)
+	inputReader := bufio.NewReader(os.Stdin)
+	str, _ := inputReader.ReadString('\n')
+	if runtime.GOOS == "windows" {
+		str = str[0 : len(str)-2]
+	} else {
+		str = str[0 : len(str)-1]
+	}
+	if str == "" {
+		str = defaults
+	}
+	return strings.TrimSpace(str)
+}
+
+func YesNo(text string, defaults bool) bool {
+	res := strings.ToUpper(MsgBox(text, ""))
+	if res == "" {
+		return defaults
+	}
+	res = res[0:1]
+	if res == "Y" {
+		return true
+	} else if res == "N" {
+		return false
+	} else {
+		return defaults
+	}
+}