From efa678f304ab65d6d57eedcb086798381ae22206 Mon Sep 17 00:00:00 2001
From: phuslu <phus.lu@gmail.com>
Date: Mon, 19 Oct 2020 17:31:50 +0800
Subject: [PATCH] Try /etc/machine-id for linux first (#60)

---
 hostid_linux.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hostid_linux.go b/hostid_linux.go
index 7d0c4a9..837b204 100644
--- a/hostid_linux.go
+++ b/hostid_linux.go
@@ -5,6 +5,9 @@ package xid
 import "io/ioutil"
 
 func readPlatformMachineID() (string, error) {
-	b, err := ioutil.ReadFile("/sys/class/dmi/id/product_uuid")
+	b, err := ioutil.ReadFile("/etc/machine-id")
+	if err != nil || len(b) == 0 {
+		b, err = ioutil.ReadFile("/sys/class/dmi/id/product_uuid")
+	}
 	return string(b), err
 }