1 package main
2
3 import (
4 "fmt"
5 "strconv"
6 "strings"
7
8 "github.com/urfave/cli"
9 "golang.org/x/sys/unix"
10 )
11
12 var killCommand = cli.Command{
13 Name: "kill",
14 Usage: "kill sends the specified signal (default: SIGTERM) to the container's init process",
15 ArgsUsage: `<container-id> [signal]
16
17 Where "<container-id>" is the name for the instance of the container and
18 "[signal]" is the signal to be sent to the init process.
19
20 EXAMPLE:
21 For example, if the container id is "ubuntu01" the following will send a "KILL"
22 signal to the init process of the "ubuntu01" container:
23
24 # runc kill ubuntu01 KILL`,
25 Flags: []cli.Flag{
26 cli.BoolFlag{
27 Name: "all, a",
28 Usage: "send the specified signal to all processes inside the container",
29 },
30 },
31 Action: func(context *cli.Context) error {
32 if err := checkArgs(context, 1, minArgs); err != nil {
33 return err
34 }
35 if err := checkArgs(context, 2, maxArgs); err != nil {
36 return err
37 }
38 container, err := getContainer(context)
39 if err != nil {
40 return err
41 }
42
43 sigstr := context.Args().Get(1)
44 if sigstr == "" {
45 sigstr = "SIGTERM"
46 }
47
48 signal, err := parseSignal(sigstr)
49 if err != nil {
50 return err
51 }
52 return container.Signal(signal, context.Bool("all"))
53 },
54 }
55
56 func parseSignal(rawSignal string) (unix.Signal, error) {
57 s, err := strconv.Atoi(rawSignal)
58 if err == nil {
59 return unix.Signal(s), nil
60 }
61 sig := strings.ToUpper(rawSignal)
62 if !strings.HasPrefix(sig, "SIG") {
63 sig = "SIG" + sig
64 }
65 signal := unix.SignalNum(sig)
66 if signal == 0 {
67 return -1, fmt.Errorf("unknown signal %q", rawSignal)
68 }
69 return signal, nil
70 }
71
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