1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
// Copyright © 2016 Zlatko Čalušić
//
// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file.
package sysinfo
import (
"errors"
"fmt"
"os/exec"
"strconv"
"strings"
)
// LogicalVolume information.
type LogicalVolume struct {
LVName string `json:"lvname,omitempty"`
VGName string `json:"vgname,omitempty"`
LVSize float64 `json:"lvsize,omitempty"`
}
func (si *SysInfo) getLVMInfo() {
lvs, err := logicalVolumes()
if err != nil {
si.LVM = lvs
return
}
si.LVM = lvs
}
func logicalVolumes() (lvs []LogicalVolume, err error) {
lvsOutput, delimiter, err := getLogicalVolumes()
if err != nil {
return []LogicalVolume{}, err
}
lvsLines := strings.Split(lvsOutput, "\n")
for _, lvLine := range lvsLines {
if len(lvLine) > 0 {
lv, err := parseLine(lvLine, delimiter)
if err != nil {
return lvs, err
}
lvs = append(lvs, lv)
}
}
return
}
func parseLine(lvsLine string, delimiter string) (lv LogicalVolume, rr error) {
var err error
tokens := strings.Split(strings.Trim(lvsLine, " "), delimiter)
if len(tokens) != 3 {
err = errors.New("expected 3 colon items from lvs, perhaps an unsupported operating system")
return LogicalVolume{}, err
}
lv.LVName = tokens[0]
lv.VGName = tokens[1]
tokens[2] = strings.Replace(tokens[2], ",", ".", -1)
lv.LVSize, err = strconv.ParseFloat(tokens[2], 32)
if err != nil {
return LogicalVolume{}, err
}
return lv, nil
}
func getLogicalVolumes() (output string, delimiter string, err error) {
delimiter = ":"
output, err = runCommand("lvs", "--units=m", "--separator=:", "--nosuffix", "--noheadings", "--options=lv_name,vg_name,lv_size")
return
}
func runCommand(name string, args ...string) (output string, err error) {
cmd := exec.Command(name, args...)
out, err := cmd.Output()
output = fmt.Sprintf("%s", out)
if err != nil {
return
}
return
}
|
