From d058f43febe397857ddaa7e72a58310e89576e28 Mon Sep 17 00:00:00 2001
From: "Vipul Gupta (@vipulgupta2048)" <vipul@balena.io>
Date: Fri, 9 Apr 2021 19:54:04 +0530
Subject: [PATCH] patch: Fix substring end parameter for accurate CPU ID

Signed-off-by: Vipul Gupta (@vipulgupta2048) <vipul@balena.io>
---
 src/lib/system-info.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/system-info.ts b/src/lib/system-info.ts
index 5ba9fcaa..7a56282f 100644
--- a/src/lib/system-info.ts
+++ b/src/lib/system-info.ts
@@ -69,7 +69,7 @@ export async function getCpuId(): Promise<string | undefined> {
 	try {
 		const buffer = await fs.readFile('/proc/device-tree/serial-number');
 		// Remove the null byte at the end
-		return buffer.toString('utf-8').substr(0, buffer.length - 2);
+		return buffer.toString('utf-8').replace(/\0/g, '');
 	} catch {
 		return undefined;
 	}