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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
package main
import (
"encoding/json"
"fmt"
"strings"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/cmd/podman/formats"
"github.com/projectatomic/libpod/libpod"
"github.com/urfave/cli"
)
var (
topFlags = []cli.Flag{
cli.StringFlag{
Name: "format",
Usage: "Change the output to JSON",
}, LatestFlag,
}
topDescription = `
podman top
Display the running processes of the container.
`
topCommand = cli.Command{
Name: "top",
Usage: "Display the running processes of a container",
Description: topDescription,
Flags: topFlags,
Action: topCmd,
ArgsUsage: "CONTAINER-NAME",
SkipArgReorder: true,
}
)
func topCmd(c *cli.Context) error {
var container *libpod.Container
var err error
doJSON := false
if c.IsSet("format") {
if strings.ToUpper(c.String("format")) == "JSON" {
doJSON = true
} else {
return errors.Errorf("only 'json' is supported for a format option")
}
}
args := c.Args()
var psArgs []string
psOpts := []string{"-o", "uid,pid,ppid,c,stime,tname,time,cmd"}
if len(args) < 1 && !c.Bool("latest") {
return errors.Errorf("you must provide the name or id of a running container")
}
if err := validateFlags(c, topFlags); err != nil {
return err
}
runtime, err := getRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
if len(args) > 1 {
psOpts = args[1:]
}
if c.Bool("latest") {
container, err = runtime.GetLatestContainer()
} else {
container, err = runtime.LookupContainer(args[0])
}
if err != nil {
return errors.Wrapf(err, "unable to lookup %s", args[0])
}
conStat, err := container.State()
if err != nil {
return errors.Wrapf(err, "unable to look up state for %s", args[0])
}
if conStat != libpod.ContainerStateRunning {
return errors.Errorf("top can only be used on running containers")
}
psArgs = append(psArgs, psOpts...)
results, err := container.GetContainerPidInformation(psArgs)
if err != nil {
return err
}
headers := getHeaders(results[0])
format := genTopFormat(headers)
var out formats.Writer
psParams, err := psDataToPSParams(results[1:], headers)
if err != nil {
return errors.Wrap(err, "unable to convert ps data to proper structure")
}
if doJSON {
out = formats.JSONStructArray{Output: topToGeneric(psParams)}
} else {
out = formats.StdoutTemplateArray{Output: topToGeneric(psParams), Template: format, Fields: createTopHeaderMap(headers)}
}
formats.Writer(out).Out()
return nil
}
func getHeaders(s string) []string {
var headers []string
tmpHeaders := strings.Fields(s)
for _, header := range tmpHeaders {
headers = append(headers, strings.Replace(header, "%", "", -1))
}
return headers
}
func genTopFormat(headers []string) string {
format := "table "
for _, header := range headers {
format = fmt.Sprintf("%s{{.%s}}\t", format, header)
}
return format
}
// imagesToGeneric creates an empty array of interfaces for output
func topToGeneric(templParams []PSParams) (genericParams []interface{}) {
for _, v := range templParams {
genericParams = append(genericParams, interface{}(v))
}
return
}
// generate the header based on the template provided
func createTopHeaderMap(v []string) map[string]string {
values := make(map[string]string)
for _, key := range v {
value := key
if value == "CPU" {
value = "%CPU"
} else if value == "MEM" {
value = "%MEM"
}
values[key] = strings.ToUpper(splitCamelCase(value))
}
return values
}
// PSDataToParams converts a string array of data and its headers to an
// arra if PSParams
func psDataToPSParams(data []string, headers []string) ([]PSParams, error) {
var params []PSParams
for _, line := range data {
tmpMap := make(map[string]string)
tmpArray := strings.Fields(line)
if len(tmpArray) == 0 {
continue
}
for index, v := range tmpArray {
header := headers[index]
tmpMap[header] = v
}
jsonData, _ := json.Marshal(tmpMap)
var r PSParams
err := json.Unmarshal(jsonData, &r)
if err != nil {
return []PSParams{}, err
}
params = append(params, r)
}
return params, nil
}
//PSParams is a list of options that the command line ps recognizes
type PSParams struct {
CPU string
MEM string
COMMAND string
BLOCKED string
START string
TIME string
C string
CAUGHT string
CGROUP string
CLSCLS string
CLS string
CMD string
CP string
DRS string
EGID string
EGROUP string
EIP string
ESP string
ELAPSED string
EUIDE string
USER string
F string
FGID string
FGROUP string
FUID string
FUSER string
GID string
GROUP string
IGNORED string
IPCNS string
LABEL string
STARTED string
SESSION string
LWP string
MACHINE string
MAJFLT string
MINFLT string
MNTNS string
NETNS string
NI string
NLWP string
OWNER string
PENDING string
PGID string
PGRP string
PID string
PIDNS string
POL string
PPID string
PRI string
PSR string
RGID string
RGROUP string
RSS string
RSZ string
RTPRIO string
RUID string
RUSER string
S string
SCH string
SEAT string
SESS string
P string
SGID string
SGROUP string
SID string
SIZE string
SLICE string
SPID string
STACKP string
STIME string
SUID string
SUPGID string
SUPGRP string
SUSER string
SVGID string
SZ string
TGID string
THCNT string
TID string
TTY string
TPGID string
TRS string
TT string
UID string
UNIT string
USERNS string
UTSNS string
UUNIT string
VSZ string
WCHAN string
}
|
