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package main
import (
"fmt"
"os"
"syscall"
"github.com/docker/docker/pkg/signal"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
var (
killFlags = []cli.Flag{
cli.StringFlag{
Name: "signal, s",
Usage: "Signal to send to the container",
Value: "KILL",
},
}
killDescription = "The main process inside each container specified will be sent SIGKILL, or any signal specified with option --signal."
killCommand = cli.Command{
Name: "kill",
Usage: "Kill one or more running containers with a specific signal",
Description: killDescription,
Flags: killFlags,
Action: killCmd,
ArgsUsage: "[CONTAINER_NAME_OR_ID]",
}
)
// killCmd kills one or more containers with a signal
func killCmd(c *cli.Context) error {
args := c.Args()
if len(args) == 0 {
return errors.Errorf("specify one or more containers to kill")
}
if err := validateFlags(c, killFlags); err != nil {
return err
}
runtime, err := getRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
var killSignal uint = uint(syscall.SIGTERM)
if c.String("signal") != "" {
// Check if the signalString provided by the user is valid
// Invalid signals will return err
sysSignal, err := signal.ParseSignal(c.String("signal"))
if err != nil {
return err
}
killSignal = uint(sysSignal)
}
var lastError error
for _, container := range c.Args() {
ctr, err := runtime.LookupContainer(container)
if err != nil {
if lastError != nil {
fmt.Fprintln(os.Stderr, lastError)
}
lastError = errors.Wrapf(err, "unable to find container %v", container)
continue
}
if err := ctr.Kill(killSignal); err != nil {
if lastError != nil {
fmt.Fprintln(os.Stderr, lastError)
}
lastError = errors.Wrapf(err, "unable to find container %v", container)
} else {
fmt.Println(ctr.ID())
}
}
return lastError
}
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