forked from containerd/containerd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
exec.go
106 lines (99 loc) · 2.16 KB
/
exec.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
package main
import (
"errors"
"github.com/Sirupsen/logrus"
"github.com/containerd/console"
"github.com/containerd/containerd"
"github.com/urfave/cli"
)
var execCommand = cli.Command{
Name: "exec",
Usage: "execute additional processes in an existing container",
ArgsUsage: "CONTAINER CMD [ARG...]",
Flags: []cli.Flag{
cli.StringFlag{
Name: "cwd",
Usage: "working directory of the new process",
},
cli.BoolFlag{
Name: "tty,t",
Usage: "allocate a TTY for the container",
},
cli.StringFlag{
Name: "exec-id",
Usage: "exec specific id for the process",
},
},
Action: func(context *cli.Context) error {
var (
ctx, cancel = appContext(context)
id = context.Args().First()
args = context.Args().Tail()
tty = context.Bool("tty")
)
defer cancel()
if id == "" {
return errors.New("container id must be provided")
}
client, err := newClient(context)
if err != nil {
return err
}
container, err := client.LoadContainer(ctx, id)
if err != nil {
return err
}
spec, err := container.Spec()
if err != nil {
return err
}
task, err := container.Task(ctx, nil)
if err != nil {
return err
}
pspec := spec.Process
pspec.Terminal = tty
pspec.Args = args
io := containerd.Stdio
if tty {
io = containerd.StdioTerminal
}
process, err := task.Exec(ctx, context.String("exec-id"), pspec, io)
if err != nil {
return err
}
defer process.Delete(ctx)
statusC := make(chan uint32, 1)
go func() {
status, err := process.Wait(ctx)
if err != nil {
logrus.WithError(err).Error("wait process")
}
statusC <- status
}()
var con console.Console
if tty {
con = console.Current()
defer con.Reset()
if err := con.SetRaw(); err != nil {
return err
}
}
if err := process.Start(ctx); err != nil {
return err
}
if tty {
if err := handleConsoleResize(ctx, process, con); err != nil {
logrus.WithError(err).Error("console resize")
}
} else {
sigc := forwardAllSignals(ctx, process)
defer stopCatch(sigc)
}
status := <-statusC
if status != 0 {
return cli.NewExitError("", int(status))
}
return nil
},
}