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