mirror of
https://github.com/opencontainers/runc.git
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c5b0be78e8
This was added by commit 5aa82c950 back in the day when we thought
runc is going to be cross-platform. It's very clear now it's Linux-only
package.
While at it, further clarify it in README that we're Linux only.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package main
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/urfave/cli"
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"golang.org/x/sys/unix"
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)
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var killCommand = cli.Command{
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Name: "kill",
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Usage: "kill sends the specified signal (default: SIGTERM) to the container's init process",
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ArgsUsage: `<container-id> [signal]
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Where "<container-id>" is the name for the instance of the container and
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"[signal]" is the signal to be sent to the init process.
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EXAMPLE:
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For example, if the container id is "ubuntu01" the following will send a "KILL"
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signal to the init process of the "ubuntu01" container:
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# runc kill ubuntu01 KILL`,
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "all, a",
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Usage: "send the specified signal to all processes inside the container",
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},
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},
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Action: func(context *cli.Context) error {
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if err := checkArgs(context, 1, minArgs); err != nil {
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return err
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}
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if err := checkArgs(context, 2, maxArgs); err != nil {
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return err
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}
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container, err := getContainer(context)
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if err != nil {
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return err
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}
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sigstr := context.Args().Get(1)
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if sigstr == "" {
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sigstr = "SIGTERM"
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}
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signal, err := parseSignal(sigstr)
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if err != nil {
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return err
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}
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return container.Signal(signal, context.Bool("all"))
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},
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}
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func parseSignal(rawSignal string) (unix.Signal, error) {
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s, err := strconv.Atoi(rawSignal)
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if err == nil {
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return unix.Signal(s), nil
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}
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sig := strings.ToUpper(rawSignal)
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if !strings.HasPrefix(sig, "SIG") {
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sig = "SIG" + sig
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}
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signal := unix.SignalNum(sig)
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if signal == 0 {
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return -1, fmt.Errorf("unknown signal %q", rawSignal)
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}
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return signal, nil
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}
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