From 9916462c47ad77dddeb7fb7ab82ac8fa2c909529 Mon Sep 17 00:00:00 2001
From: Daniel Stutz <dstutz@gmail.com>
Date: Tue, 13 Apr 2021 10:31:23 +0200
Subject: [PATCH] use ioreg to read IOPlatformUUID as HostID

---
 host/host_darwin.go    | 21 +++++++++++++++++++--
 v3/host/host_darwin.go | 21 +++++++++++++++++++--
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/host/host_darwin.go b/host/host_darwin.go
index 8f51b20..d3e23cf 100644
--- a/host/host_darwin.go
+++ b/host/host_darwin.go
@@ -6,6 +6,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/binary"
+	"errors"
 	"io/ioutil"
 	"os"
 	"os/exec"
@@ -21,11 +22,27 @@ import (
 const USER_PROCESS = 7
 
 func HostIDWithContext(ctx context.Context) (string, error) {
-	uuid, err := unix.Sysctl("kern.uuid")
+	ioreg, err := exec.LookPath("ioreg")
 	if err != nil {
 		return "", err
 	}
-	return strings.ToLower(uuid), err
+
+	out, err := invoke.CommandWithContext(ctx, ioreg, "-rd1", "-c", "IOPlatformExpertDevice")
+	if err != nil {
+		return "", err
+	}
+
+	for _, line := range strings.Split(string(out), "\n") {
+		if strings.Contains(line, "IOPlatformUUID") {
+			parts := strings.SplitAfter(line, `" = "`)
+			if len(parts) == 2 {
+				uuid := strings.TrimRight(parts[1], `"`)
+				return strings.ToLower(uuid), nil
+			}
+		}
+	}
+
+	return "", errors.New("cannot find host id")
 }
 
 func numProcs(ctx context.Context) (uint64, error) {
diff --git a/v3/host/host_darwin.go b/v3/host/host_darwin.go
index 9aadc54..6ac7a82 100644
--- a/v3/host/host_darwin.go
+++ b/v3/host/host_darwin.go
@@ -6,6 +6,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/binary"
+	"errors"
 	"io/ioutil"
 	"os"
 	"os/exec"
@@ -21,11 +22,27 @@ import (
 const user_PROCESS = 7
 
 func HostIDWithContext(ctx context.Context) (string, error) {
-	uuid, err := unix.Sysctl("kern.uuid")
+	ioreg, err := exec.LookPath("ioreg")
 	if err != nil {
 		return "", err
 	}
-	return strings.ToLower(uuid), err
+
+	out, err := invoke.CommandWithContext(ctx, ioreg, "-rd1", "-c", "IOPlatformExpertDevice")
+	if err != nil {
+		return "", err
+	}
+
+	for _, line := range strings.Split(string(out), "\n") {
+		if strings.Contains(line, "IOPlatformUUID") {
+			parts := strings.SplitAfter(line, `" = "`)
+			if len(parts) == 2 {
+				uuid := strings.TrimRight(parts[1], `"`)
+				return strings.ToLower(uuid), nil
+			}
+		}
+	}
+
+	return "", errors.New("cannot find host id")
 }
 
 func numProcs(ctx context.Context) (uint64, error) {