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
|
// SPDX-License-Identifier: GPL-3.0-or-later
package postfix
import (
"bufio"
"bytes"
"errors"
"fmt"
"strconv"
"strings"
)
type postqueueStats struct {
sizeKbyte int64
requests int64
}
func (p *Postfix) collect() (map[string]int64, error) {
bs, err := p.exec.list()
if err != nil {
return nil, err
}
stats, err := parsePostqueueOutput(bs)
if err != nil {
return nil, err
}
mx := make(map[string]int64)
mx["emails"] = stats.requests
mx["size"] = stats.sizeKbyte
return mx, nil
}
func parsePostqueueOutput(bs []byte) (*postqueueStats, error) {
if len(bs) == 0 {
return nil, errors.New("empty postqueue output")
}
var lastLine string
sc := bufio.NewScanner(bytes.NewReader(bs))
for sc.Scan() {
if line := strings.TrimSpace(sc.Text()); line != "" {
lastLine = strings.TrimSpace(sc.Text())
}
}
if lastLine == "Mail queue is empty" {
return &postqueueStats{}, nil
}
// -- 3 Kbytes in 3 Requests.
parts := strings.Fields(lastLine)
if len(parts) < 5 {
return nil, fmt.Errorf("unexpected postqueue output ('%s')", lastLine)
}
size, err := strconv.ParseInt(parts[1], 10, 64)
if err != nil {
return nil, fmt.Errorf("unexpected postqueue output ('%s')", lastLine)
}
requests, err := strconv.ParseInt(parts[4], 10, 64)
if err != nil {
return nil, fmt.Errorf("unexpected postqueue output ('%s')", lastLine)
}
return &postqueueStats{sizeKbyte: size, requests: requests}, nil
}
|
