mirror of https://github.com/k3s-io/k3s
55 lines
870 B
Go
55 lines
870 B
Go
package vhd
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import (
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"encoding/hex"
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"fmt"
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"os"
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"strings"
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)
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// https://groups.google.com/forum/#!msg/golang-nuts/d0nF_k4dSx4/rPGgfXv6QCoJ
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func uuidgen() string {
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b := uuidgenBytes()
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return fmt.Sprintf("%x-%x-%x-%x-%x",
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b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
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}
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func fmtField(name, value string) {
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fmt.Printf("%-25s%s\n", name+":", value)
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}
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func uuidgenBytes() []byte {
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f, err := os.Open("/dev/urandom")
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check(err)
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b := make([]byte, 16)
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f.Read(b)
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return b
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}
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func check(e error) {
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if e != nil {
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panic(e)
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}
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}
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func hexs(a []byte) string {
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return "0x" + hex.EncodeToString(a[:])
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}
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func uuid(a []byte) string {
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return fmt.Sprintf("%08x-%04x-%04x-%04x-%04x",
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a[:4],
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a[4:6],
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a[6:8],
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a[8:10],
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a[10:16])
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}
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func uuidToBytes(uuid string) []byte {
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s := strings.Replace(uuid, "-", "", -1)
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h, err := hex.DecodeString(s)
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check(err)
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return h
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}
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