| // +build linux |
| |
| package main |
| |
| import ( |
| "fmt" |
| "strconv" |
| "strings" |
| |
| "github.com/urfave/cli" |
| "golang.org/x/sys/unix" |
| ) |
| |
| var killCommand = cli.Command{ |
| Name: "kill", |
| Usage: "kill sends the specified signal (default: SIGTERM) to the container's init process", |
| ArgsUsage: `<container-id> [signal] |
| |
| Where "<container-id>" is the name for the instance of the container and |
| "[signal]" is the signal to be sent to the init process. |
| |
| EXAMPLE: |
| For example, if the container id is "ubuntu01" the following will send a "KILL" |
| signal to the init process of the "ubuntu01" container: |
| |
| # runc kill ubuntu01 KILL`, |
| Flags: []cli.Flag{ |
| cli.BoolFlag{ |
| Name: "all, a", |
| Usage: "send the specified signal to all processes inside the container", |
| }, |
| }, |
| Action: func(context *cli.Context) error { |
| if err := checkArgs(context, 1, minArgs); err != nil { |
| return err |
| } |
| if err := checkArgs(context, 2, maxArgs); err != nil { |
| return err |
| } |
| container, err := getContainer(context) |
| if err != nil { |
| return err |
| } |
| |
| sigstr := context.Args().Get(1) |
| if sigstr == "" { |
| sigstr = "SIGTERM" |
| } |
| |
| signal, err := parseSignal(sigstr) |
| if err != nil { |
| return err |
| } |
| return container.Signal(signal, context.Bool("all")) |
| }, |
| } |
| |
| func parseSignal(rawSignal string) (unix.Signal, error) { |
| s, err := strconv.Atoi(rawSignal) |
| if err == nil { |
| return unix.Signal(s), nil |
| } |
| sig := strings.ToUpper(rawSignal) |
| if !strings.HasPrefix(sig, "SIG") { |
| sig = "SIG" + sig |
| } |
| signal := unix.SignalNum(sig) |
| if signal == 0 { |
| return -1, fmt.Errorf("unknown signal %q", rawSignal) |
| } |
| return signal, nil |
| } |