From 4cb09e2ac6f55f203d4effb80544f40472a54fb4 Mon Sep 17 00:00:00 2001
From: Jason-ZW <zhenyang@rancher.com>
Date: Tue, 9 Oct 2018 10:03:51 +0800
Subject: [PATCH] Add friendly tips on ros config syslinux

---
 cmd/control/config.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/cmd/control/config.go b/cmd/control/config.go
index e9e95014..09666525 100644
--- a/cmd/control/config.go
+++ b/cmd/control/config.go
@@ -1,6 +1,7 @@
 package control
 
 import (
+	"bufio"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -14,6 +15,7 @@ import (
 	"github.com/rancher/os/pkg/log"
 
 	"github.com/codegangsta/cli"
+	"github.com/pkg/errors"
 	"github.com/rancher/os/config"
 	"github.com/rancher/os/pkg/util"
 )
@@ -153,6 +155,22 @@ func env2map(env []string) map[string]string {
 }
 
 func editSyslinux(c *cli.Context) error {
+	// check whether is Raspberry Pi or not
+	bytes, err := ioutil.ReadFile("/proc/device-tree/model")
+	if err == nil && strings.Contains(strings.ToLower(string(bytes)), "raspberry") {
+		buf := bufio.NewWriter(os.Stdout)
+		fmt.Fprintln(buf, "raspberry pi can not use this command")
+		buf.Flush()
+		return errors.New("raspberry pi can not use this command")
+	}
+
+	if _, err := os.Stat("/proc/1/root/boot/global.cfg"); os.IsNotExist(err) {
+		buf := bufio.NewWriter(os.Stdout)
+		fmt.Fprintln(buf, "global.cfg can not be found")
+		buf.Flush()
+		return errors.New("global.cfg can not be found")
+	}
+
 	cmd := exec.Command("system-docker", "run", "--rm", "-it",
 		"-v", "/:/host",
 		"-w", "/host",