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// +build freebsd netbsd openbsd dragonfly solaris
package machineid
import (
"bytes"
"os"
)
const hostidPath = "/etc/hostid"
// machineID returns the uuid specified at `/etc/hostid`.
// If the returned value is empty, the uuid from a call to `kenv -q smbios.system.uuid` is returned.
// If there is an error an empty string is returned.
func machineID() (string, error) {
id, err := readHostid()
if err != nil {
// try fallback
id, err = readKenv()
}
if err != nil {
return "", err
}
return id, nil
}
func readHostid() (string, error) {
buf, err := readFile(hostidPath)
if err != nil {
return "", err
}
return trim(string(buf)), nil
}
func readKenv() (string, error) {
buf := &bytes.Buffer{}
err := run(buf, os.Stderr, "kenv", "-q", "smbios.system.uuid")
if err != nil {
return "", err
}
return trim(buf.String()), nil
}
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