1// Licensed to Elasticsearch B.V. under one or more contributor
2// license agreements. See the NOTICE file distributed with
3// this work for additional information regarding copyright
4// ownership. Elasticsearch B.V. licenses this file to you under
5// the Apache License, Version 2.0 (the "License"); you may
6// not use this file except in compliance with the License.
7// You may obtain a copy of the License at
8//
9//     http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18// +build darwin,amd64,cgo
19
20package darwin
21
22import (
23	"syscall"
24	"time"
25
26	"github.com/pkg/errors"
27)
28
29const kernBoottimeMIB = "kern.boottime"
30
31func BootTime() (time.Time, error) {
32	var tv syscall.Timeval
33	if err := sysctlByName(kernBoottimeMIB, &tv); err != nil {
34		return time.Time{}, errors.Wrap(err, "failed to get host uptime")
35	}
36
37	bootTime := time.Unix(int64(tv.Sec), int64(tv.Usec)*int64(time.Microsecond))
38	return bootTime, nil
39}
40