Add productPath as fallback

cmd/machineid/main.go

@@ -3,19 +3,21 @@
 // Usage: machineid [options]
 //
 // Options:
-//   --appid    <AppID>    Protect machine id by hashing it together with an app id.
+//
+//	--appid    <AppID>    Protect machine id by hashing it together with an app id.
 //
 // Try:
-//   machineid
-//   machineid --appid MyAppID
+//
+//	machineid
+//	machineid --appid MyAppID
 package main
 
 import (
 	"flag"
 	"fmt"
 	"log"
 
-	"github.com/denisbrodbeck/machineid"
+	"github.com/iseki0/machineid"
 )
 
 const usageStr = `

example_test.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"log"
 
-	"github.com/denisbrodbeck/machineid"
+	"github.com/iseki0/machineid"
 )
 
 func Example() {

go.mod

@@ -0,0 +1,5 @@
+module github.com/iseki0/machineid
+
+go 1.18
+
+require golang.org/x/sys v0.24.0

go.sum

@@ -0,0 +1,2 @@
+golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
+golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

id.go

@@ -17,7 +17,7 @@
 // Linux users can generate a new id with `dbus-uuidgen` and put the id into
 // `/var/lib/dbus/machine-id` and `/etc/machine-id`.
 // Windows users can use the `sysprep` toolchain to create images, which produce valid images ready for distribution.
-package machineid // import "github.com/denisbrodbeck/machineid"
+package machineid // import "github.com/iseki0/machineid"
 
 import (
 	"fmt"

id_bsd.go

@@ -1,3 +1,4 @@
+//go:build freebsd || netbsd || openbsd || dragonfly || solaris
 // +build freebsd netbsd openbsd dragonfly solaris
 
 package machineid

id_darwin.go

@@ -1,3 +1,4 @@
+//go:build darwin
 // +build darwin
 
 package machineid

id_darwin_test.go

@@ -1,3 +1,4 @@
+//go:build darwin
 // +build darwin
 
 package machineid

id_linux.go

@@ -1,3 +1,4 @@
+//go:build linux
 // +build linux
 
 package machineid
@@ -9,6 +10,10 @@ const (
 	// Some systems (like Fedora 20) only know this path.
 	// Sometimes it's the other way round.
 	dbusPathEtc = "/etc/machine-id"
+
+	// Some old release haven't above two paths.
+	// Workaround.
+	productPath = "/sys/class/dmi/id/product_uuid"
 )
 
 // machineID returns the uuid specified at `/var/lib/dbus/machine-id` or `/etc/machine-id`.
@@ -20,6 +25,10 @@ func machineID() (string, error) {
 		// try fallback path
 		id, err = readFile(dbusPathEtc)
 	}
+	if err != nil {
+		// try fallback path
+		id, err = readFile(productPath)
+	}
 	if err != nil {
 		return "", err
 	}

id_windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package machineid