/
command.go
160 lines (138 loc) · 3.43 KB
/
command.go
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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
package scrape
import (
"bufio"
"errors"
"fmt"
"io"
"strconv"
"strings"
"time"
"github.com/liupzmin/weewoe/log"
"github.com/liupzmin/weewoe/ssh"
"github.com/liupzmin/weewoe/util/xmap"
"github.com/liupzmin/weewoe/util/xstring"
ssh2 "golang.org/x/crypto/ssh"
)
type Command struct {
target Target
p Process
}
func NewCommand(t Target, p Process) *Command {
return &Command{
target: t,
p: p,
}
}
func (c *Command) GetPID() (string, error) {
if c.p.Flag == "" && c.p.PIDFile == "" {
return "", fmt.Errorf("you have to specify either pidfile or flag")
}
if c.p.PIDFile != "" {
return c.getPIDByFile(c.p.PIDFile)
}
return c.getPIDByFlag(c.p.Flag)
}
func (c *Command) GetProcessStat() (*ProcessState, error) {
bad := &ProcessState{
Process: c.p,
State: Bad,
StateDescribe: "",
StartTime: 0,
Timestamp: time.Now().Unix(),
}
btime, err := GetBootTime(c.target.Conn)
if err != nil {
log.Warnf("GetBootTime error: %s", err)
return bad, nil
}
pid, err := c.GetPID()
if err != nil {
log.Warnf("GetPID failed: %s", err)
return bad, nil
}
log.Debugf("%s's pid is %s", c.p.Name, pid)
cmd := fmt.Sprintf("/bin/cat /proc/%s/stat", strings.TrimSpace(pid))
output, err := c.target.Conn.SingleRun(cmd)
if err != nil {
var exit *ssh2.ExitError
if errors.As(err, &exit) {
log.Warnf("GetProcessStat error exit: %s", err)
return bad, nil
} else {
return nil, err
}
}
reader := bufio.NewReader(strings.NewReader(output))
stat, _, err := reader.ReadLine()
if err != nil {
return nil, err
}
ps, err := NewProcStat(stat)
if err != nil {
return nil, err
}
return &ProcessState{
Process: c.p,
State: Good,
StateDescribe: ps.State,
StartTime: ps.StartTime(btime),
Timestamp: time.Now().Unix(),
}, nil
}
func (c *Command) getPIDByFile(file string) (string, error) {
cmd := fmt.Sprintf("cat %s", file)
pid, err := c.target.Conn.SingleRun(cmd)
if err != nil {
return "", err
}
if pid == "" {
return "", fmt.Errorf("pid file is empty")
}
return pid, nil
}
func (c *Command) getPIDByFlag(flag string) (string, error) {
flags := xmap.Map(strings.Split(flag, ","), func(s string) string {
return "grep " + s
})
//cmd := fmt.Sprintf("ps -ef|%s|grep -v grep|awk '{print $2}'", strings.Join(flags, "|"))
cmd := fmt.Sprintf("ps -ef|%s|grep -v grep", strings.Join(flags, "|"))
log.Infof("Run CMD: %s", cmd)
output, err := c.target.Conn.SingleRun(cmd)
if err != nil {
return "", err
}
output = xstring.TrimEmptyLines([]byte(output))
log.Infof("Output for [%s]: %s", flag, output)
count, err := xstring.GetNoEmptyLineNumber(output)
if err != nil {
log.Errorf("get line number failed: %s", err.Error())
return "", err
}
if count > 1 {
return "", fmt.Errorf("more than 1 line in pid cmd output")
}
reader := bufio.NewReader(strings.NewReader(output))
pidStr, _, err := reader.ReadLine()
if err == io.EOF {
return "", err
}
if err != nil {
log.Errorf("read pid line failed: %s", err.Error())
return "", err
}
pidSlice := strings.Fields(string(pidStr))
return pidSlice[1], nil
}
func GetBootTime(conn *ssh.Connection) (int64, error) {
cmd := "cat /proc/stat|grep btime|awk '{print $2}'"
output, err := conn.SingleRun(cmd)
if err != nil {
return 0, err
}
reader := bufio.NewReader(strings.NewReader(output))
btime, _, err := reader.ReadLine()
if err != nil {
return 0, err
}
return strconv.ParseInt(string(btime), 10, 64)
}