// SignalsTopic returns a ControlZ topic that sends command signals to the process
func SignalsTopic() fw.Topic {
	return signalsTopic{}
}

func (signalsTopic) Title() string {
	return "Signals"
}

func (signalsTopic) Prefix() string {
	return "signal"
}

func (signalsTopic) Activate(context fw.TopicContext) {
	tmpl := assets.ParseTemplate(context.Layout(), "templates/signals.html")

{{ define "content" }}

<p>
    Send signals to the running process.
</p>

<br>
<button class="btn btn-istio" onclick="sendSIGUSR1()">SIGUSR1</button>

{{ template "last-refresh" .}}

<script>
    "use strict";

    function sendSIGUSR1() {
        let url = window.location.protocol + "//" + window.location.host + "/signalj/SIGUSR1";

        let ajax = new XMLHttpRequest();
        ajax.onload = onload;

			exit(stopProcess())
		case osSignal := <-globalOSSignalCh:
			logger.Info("Exiting on signal: %s", strings.ToUpper(osSignal.String()))
			daemon.SdNotify(false, daemon.SdNotifyStopping)
			exit(stopProcess())
		case signal := <-globalServiceSignalCh:
			switch signal {
			case serviceRestart:
				logger.Info("Restarting on service signal")
				daemon.SdNotify(false, daemon.SdNotifyReloading)
				stop := stopProcess()

// signals no longer need to be diverted to the context.
func NotifyContext(parent context.Context, signals ...os.Signal) (ctx context.Context, stop context.CancelFunc) {
	ctx, cancel := context.WithCancel(parent)
	c := &signalCtx{
		Context: ctx,
		cancel:  cancel,
		signals: signals,
	}
	c.ch = make(chan os.Signal, 1)
	Notify(c.ch, c.signals...)
	if ctx.Err() == nil {
		go func() {

asynchronous signal, a Go signal handler will be installed for that
signal. If, later, Reset is called for that signal, the original
handling for that signal will be reinstalled, restoring the non-Go
signal handler if any.

Go code built without -buildmode=c-archive or -buildmode=c-shared will
install a signal handler for the asynchronous signals listed above,
and save any existing signal handler. If a signal is delivered to a

			buf[0] += a - A;
		printf("\t%d: \"%s\",\n", e, buf);
	}
	printf("}\n\n");
	
	printf("\n\n// Signal table\n");
	printf("var signals = [...]string {\n");
	qsort(signals, nelem(signals), sizeof signals[0], intcmp);
	for(i=0; i<nelem(signals); i++) {
		e = signals[i];
		if(i > 0 && signals[i-1] == e)
			continue;
		strcpy(buf, strsignal(e));
		// lowercase first letter: Bad -> bad, but STREAM -> STREAM.

		flags = sigtable[sig].flags
	}

	// If the signal is ignored, raising the signal is no-op.
	if handler == _SIG_IGN || (handler == _SIG_DFL && flags&_SigIgn != 0) {
		return
	}

	// Reset the signal handler and raise the signal.
	// We are currently running inside a signal handler, so the
	// signal is blocked. We need to unblock it before raising the
	// signal, or the signal we raise will be ignored until we return

	// an asynchronous process.
	signals.AfterShutdownDelayDuration = wrapLifecycleSignal(t, signals.AfterShutdownDelayDuration, before, nil)
	signals.PreShutdownHooksStopped = wrapLifecycleSignal(t, signals.PreShutdownHooksStopped, before, nil)
	signals.NotAcceptingNewRequest = wrapLifecycleSignal(t, signals.NotAcceptingNewRequest, before, nil)
	signals.HTTPServerStoppedListening = wrapLifecycleSignal(t, signals.HTTPServerStoppedListening, before, nil)

package main

import "C"

import (
	"os"
	"os/signal"
	"syscall"
	"time"
)

// The channel used to read SIGIO signals.
var sigioChan chan os.Signal

// CatchSIGIO starts catching SIGIO signals.
//
//export CatchSIGIO
func CatchSIGIO() {
	sigioChan = make(chan os.Signal, 1)
	signal.Notify(sigioChan, syscall.SIGIO)
}

// ResetSIGIO stops catching SIGIO signals.
//
//export ResetSIGIO
func ResetSIGIO() {

package main

import "C"

import (
	"os"
	"os/signal"
	"syscall"
	"time"
)

// The channel used to read SIGIO signals.
var sigioChan chan os.Signal

// CatchSIGIO starts catching SIGIO signals.
//
//export CatchSIGIO
func CatchSIGIO() {
	sigioChan = make(chan os.Signal, 1)
	signal.Notify(sigioChan, syscall.SIGIO)
}

// ResetSIGIO stops catching SIGIO signals.
//
//export ResetSIGIO
func ResetSIGIO() {