1// +build linux
2
3package machineid
4
5const (
6	// dbusPath is the default path for dbus machine id.
7	dbusPath = "/var/lib/dbus/machine-id"
8	// dbusPathEtc is the default path for dbus machine id located in /etc.
9	// Some systems (like Fedora 20) only know this path.
10	// Sometimes it's the other way round.
11	dbusPathEtc = "/etc/machine-id"
12)
13
14// machineID returns the uuid specified at `/var/lib/dbus/machine-id` or `/etc/machine-id`.
15// If there is an error reading the files an empty string is returned.
16// See https://unix.stackexchange.com/questions/144812/generate-consistent-machine-unique-id
17func machineID() (string, error) {
18	id, err := readFile(dbusPath)
19	if err != nil {
20		// try fallback path
21		id, err = readFile(dbusPathEtc)
22	}
23	if err != nil {
24		return "", err
25	}
26	return trim(string(id)), nil
27}
28