1/*
2** Zabbix
3** Copyright (C) 2001-2021 Zabbix SIA
4**
5** This program is free software; you can redistribute it and/or modify
6** it under the terms of the GNU General Public License as published by
7** the Free Software Foundation; either version 2 of the License, or
8** (at your option) any later version.
9**
10** This program is distributed in the hope that it will be useful,
11** but WITHOUT ANY WARRANTY; without even the implied warranty of
12** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13** GNU General Public License for more details.
14**
15** You should have received a copy of the GNU General Public License
16** along with this program; if not, write to the Free Software
17** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
18**/
19
20package uptime
21
22import (
23	"bufio"
24	"errors"
25	"fmt"
26	"strconv"
27	"strings"
28	"time"
29
30	"zabbix.com/pkg/std"
31)
32
33func getUptime() (uptime int, err error) {
34	var file std.File
35	if file, err = stdOs.Open("/proc/stat"); err != nil {
36		err = fmt.Errorf("Cannot read boot time: %s", err.Error())
37		return
38	}
39	defer file.Close()
40
41	scanner := bufio.NewScanner(file)
42	for scanner.Scan() {
43		if strings.HasPrefix(scanner.Text(), "btime") {
44			var boot int
45			if boot, err = strconv.Atoi(scanner.Text()[6:]); err != nil {
46				return
47			}
48			return int(time.Now().Unix()) - boot, nil
49		}
50	}
51
52	return 0, errors.New("Cannot locate boot time")
53}
54