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// +build linux
package main
import (
"fmt"
"strconv"
"strings"
"syscall"
"github.com/urfave/cli"
)
var signalMap = map[string]syscall.Signal{
"ABRT": syscall.SIGABRT,
"ALRM": syscall.SIGALRM,
"BUS": syscall.SIGBUS,
"CHLD": syscall.SIGCHLD,
"CLD": syscall.SIGCLD,
"CONT": syscall.SIGCONT,
"FPE": syscall.SIGFPE,
"HUP": syscall.SIGHUP,
"ILL": syscall.SIGILL,
"INT": syscall.SIGINT,
"IO": syscall.SIGIO,
"IOT": syscall.SIGIOT,
"KILL": syscall.SIGKILL,
"PIPE": syscall.SIGPIPE,
"POLL": syscall.SIGPOLL,
"PROF": syscall.SIGPROF,
"PWR": syscall.SIGPWR,
"QUIT": syscall.SIGQUIT,
"SEGV": syscall.SIGSEGV,
"STKFLT": syscall.SIGSTKFLT,
"STOP": syscall.SIGSTOP,
"SYS": syscall.SIGSYS,
"TERM": syscall.SIGTERM,
"TRAP": syscall.SIGTRAP,
"TSTP": syscall.SIGTSTP,
"TTIN": syscall.SIGTTIN,
"TTOU": syscall.SIGTTOU,
"UNUSED": syscall.SIGUNUSED,
"URG": syscall.SIGURG,
"USR1": syscall.SIGUSR1,
"USR2": syscall.SIGUSR2,
"VTALRM": syscall.SIGVTALRM,
"WINCH": syscall.SIGWINCH,
"XCPU": syscall.SIGXCPU,
"XFSZ": syscall.SIGXFSZ,
}
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, 2, exactArgs); 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 {
sig := syscall.Signal(s)
for _, msig := range signalMap {
if sig == msig {
return sig, nil
}
}
return -1, fmt.Errorf("unknown signal %q", rawSignal)
}
signal, ok := signalMap[strings.TrimPrefix(strings.ToUpper(rawSignal), "SIG")]
if !ok {
return -1, fmt.Errorf("unknown signal %q", rawSignal)
}
return signal, nil
}