Merge pull request #75 from zchee/homebrew

Add check binary owner on PreCreateCheck()

README.md

@@ -36,6 +36,18 @@ If you were doubt problem either, please post to this repository [issues](https:
 
 ## Install
 
+Use [Homebrew/homebrew](https://github.com/Homebrew/homebrew),
+
+```bash
+$ brew install docker-machine-driver-xhyve
+
+# docker-machine-driver-xhyve need root owner and uid
+$ sudo chown root:wheel $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
+$ sudo chmod u+s $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
+```
+
+Use `go get`,
+
 ```bash
 # Need Go 1.5 vendoring support
 $ export GO15VENDOREXPERIMENT=1

xhyve/xhyve.go

@@ -285,6 +285,16 @@ func (d *Driver) PreCreateCheck() error {
 			ver +
 			"\n\t Please upgrade to version 5 at https://www.virtualbox.org/wiki/Downloads")
 	}
+
+	// Check binary owner
+	bin, err := os.Stat(os.Args[0])
+	if err != nil {
+		return err
+	}
+	if int(bin.Sys().(*syscall.Stat_t).Uid) == 501 {
+		return fmt.Errorf("%s need root owner. See https://github.com/zchee/docker-machine-driver-xhyve#install", os.Args[0])
+	}
+
 	return nil
 }