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