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// +build linux
package main
import (
"fmt"
"strconv"
"strings"
"syscall"
"github.com/urfave/cli"
)
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
}
if err := container.Signal(signal, context.Bool("all")); err != nil {
return err
}
return nil
},
}
func parseSignal(rawSignal string) (syscall.Signal, error) {
s, err := strconv.Atoi(rawSignal)
if err == nil {
return syscall.Signal(s), nil
}
signal, ok := signalMap[strings.TrimPrefix(strings.ToUpper(rawSignal), "SIG")]
if !ok {
return -1, fmt.Errorf("unknown signal %q", rawSignal)
}
return signal, nil
}