mirror of
https://github.com/denoland/deno.git
synced 2024-12-24 16:19:12 -05:00
Add signal handlers (#3757)
This commit is contained in:
parent
a6a7253df9
commit
bc89f04cbf
13 changed files with 596 additions and 2 deletions
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@ -101,6 +101,7 @@ export {
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} from "./process.ts";
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export { transpileOnly, compile, bundle } from "./compiler_api.ts";
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export { inspect } from "./console.ts";
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export { signal, signals, SignalStream } from "./signals.ts";
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export { build, OperatingSystem, Arch } from "./build.ts";
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export { version } from "./version.ts";
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export const args: string[] = [];
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@ -74,6 +74,9 @@ export let OP_HOSTNAME: number;
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export let OP_OPEN_PLUGIN: number;
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export let OP_COMPILE: number;
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export let OP_TRANSPILE: number;
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export let OP_SIGNAL_BIND: number;
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export let OP_SIGNAL_UNBIND: number;
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export let OP_SIGNAL_POLL: number;
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/** **WARNING:** This is only available during the snapshotting process and is
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* unavailable at runtime. */
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74
cli/js/lib.deno_runtime.d.ts
vendored
74
cli/js/lib.deno_runtime.d.ts
vendored
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@ -2130,6 +2130,80 @@ declare namespace Deno {
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*/
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export const args: string[];
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/** SignalStream represents the stream of signals, implements both
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* AsyncIterator and PromiseLike */
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export class SignalStream implements AsyncIterator<void>, PromiseLike<void> {
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constructor(signal: typeof Deno.Signal);
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then<T, S>(
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f: (v: void) => T | Promise<T>,
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g?: (v: void) => S | Promise<S>
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): Promise<T | S>;
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next(): Promise<IteratorResult<void>>;
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[Symbol.asyncIterator](): AsyncIterator<void>;
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dispose(): void;
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}
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/**
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* Returns the stream of the given signal number. You can use it as an async
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* iterator.
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*
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* for await (const _ of Deno.signal(Deno.Signal.SIGTERM)) {
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* console.log("got SIGTERM!");
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* }
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*
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* You can also use it as a promise. In this case you can only receive the
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* first one.
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*
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* await Deno.signal(Deno.Signal.SIGTERM);
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* console.log("SIGTERM received!")
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*
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* If you want to stop receiving the signals, you can use .dispose() method
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* of the signal stream object.
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*
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* const sig = Deno.signal(Deno.Signal.SIGTERM);
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* setTimeout(() => { sig.dispose(); }, 5000);
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* for await (const _ of sig) {
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* console.log("SIGTERM!")
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* }
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*
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* The above for-await loop exits after 5 seconds when sig.dispose() is called.
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*/
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export function signal(signo: number): SignalStream;
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export const signals: {
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/** Returns the stream of SIGALRM signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGALRM). */
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alarm: () => SignalStream;
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/** Returns the stream of SIGCHLD signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGCHLD). */
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child: () => SignalStream;
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/** Returns the stream of SIGHUP signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGHUP). */
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hungup: () => SignalStream;
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/** Returns the stream of SIGINT signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGINT). */
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interrupt: () => SignalStream;
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/** Returns the stream of SIGIO signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGIO). */
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io: () => SignalStream;
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/** Returns the stream of SIGPIPE signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGPIPE). */
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pipe: () => SignalStream;
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/** Returns the stream of SIGQUIT signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGQUIT). */
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quit: () => SignalStream;
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/** Returns the stream of SIGTERM signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGTERM). */
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terminate: () => SignalStream;
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/** Returns the stream of SIGUSR1 signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGUSR1). */
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userDefined1: () => SignalStream;
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/** Returns the stream of SIGUSR2 signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGUSR2). */
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userDefined2: () => SignalStream;
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/** Returns the stream of SIGWINCH signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGWINCH). */
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windowChange: () => SignalStream;
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};
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/** UNSTABLE: new API. Maybe move EOF here.
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*
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* Special Deno related symbols.
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@ -296,7 +296,7 @@ enum MacOSSignal {
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/** Signals numbers. This is platform dependent.
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*/
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export const Signal = {};
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export const Signal: { [key: string]: number } = {};
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export function setSignals(): void {
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if (build.os === "mac") {
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185
cli/js/signal_test.ts
Normal file
185
cli/js/signal_test.ts
Normal file
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@ -0,0 +1,185 @@
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import {
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test,
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testPerm,
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assert,
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assertEquals,
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assertThrows
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} from "./test_util.ts";
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function defer(n: number): Promise<void> {
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return new Promise((resolve, _) => {
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setTimeout(resolve, n);
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});
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}
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if (Deno.build.os === "win") {
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test(async function signalsNotImplemented(): Promise<void> {
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assertThrows(
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() => {
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Deno.signal(1);
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.alarm(); // for SIGALRM
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.child(); // for SIGCHLD
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.hungup(); // for SIGHUP
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.interrupt(); // for SIGINT
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.io(); // for SIGIO
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.pipe(); // for SIGPIPE
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.quit(); // for SIGQUIT
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.terminate(); // for SIGTERM
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.userDefined1(); // for SIGUSR1
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.userDefined2(); // for SIGURS2
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},
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Error,
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"not implemented"
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);
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assertThrows(
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() => {
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Deno.signals.windowChange(); // for SIGWINCH
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},
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Error,
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"not implemented"
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);
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});
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} else {
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testPerm({ run: true, net: true }, async function signalStreamTest(): Promise<
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void
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> {
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// This prevents the program from exiting.
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const t = setInterval(() => {}, 1000);
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let c = 0;
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const sig = Deno.signal(Deno.Signal.SIGUSR1);
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setTimeout(async () => {
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await defer(20);
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for (const _ of Array(3)) {
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// Sends SIGUSR1 3 times.
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Deno.kill(Deno.pid, Deno.Signal.SIGUSR1);
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await defer(20);
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}
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sig.dispose();
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});
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for await (const _ of sig) {
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c += 1;
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}
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assertEquals(c, 3);
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clearTimeout(t);
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});
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testPerm(
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{ run: true, net: true },
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async function signalPromiseTest(): Promise<void> {
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// This prevents the program from exiting.
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const t = setInterval(() => {}, 1000);
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const sig = Deno.signal(Deno.Signal.SIGUSR1);
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setTimeout(() => {
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Deno.kill(Deno.pid, Deno.Signal.SIGUSR1);
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}, 20);
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await sig;
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sig.dispose();
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clearTimeout(t);
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}
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);
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testPerm({ run: true }, async function signalShorthandsTest(): Promise<void> {
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let s: Deno.SignalStream;
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s = Deno.signals.alarm(); // for SIGALRM
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.child(); // for SIGCHLD
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.hungup(); // for SIGHUP
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.interrupt(); // for SIGINT
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.io(); // for SIGIO
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.pipe(); // for SIGPIPE
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.quit(); // for SIGQUIT
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.terminate(); // for SIGTERM
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.userDefined1(); // for SIGUSR1
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.userDefined2(); // for SIGURS2
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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s = Deno.signals.windowChange(); // for SIGWINCH
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assert(s instanceof Deno.SignalStream);
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s.dispose();
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});
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}
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148
cli/js/signals.ts
Normal file
148
cli/js/signals.ts
Normal file
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@ -0,0 +1,148 @@
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { Signal } from "./process.ts";
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import * as dispatch from "./dispatch.ts";
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import { sendSync, sendAsync } from "./dispatch_json.ts";
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import { build } from "./build.ts";
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/**
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* Returns the stream of the given signal number. You can use it as an async
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* iterator.
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*
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* for await (const _ of Deno.signal(Deno.Signal.SIGTERM)) {
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* console.log("got SIGTERM!");
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* }
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*
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* You can also use it as a promise. In this case you can only receive the
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* first one.
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*
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* await Deno.signal(Deno.Signal.SIGTERM);
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* console.log("SIGTERM received!")
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*
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* If you want to stop receiving the signals, you can use .dispose() method
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* of the signal stream object.
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*
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* const sig = Deno.signal(Deno.Signal.SIGTERM);
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* setTimeout(() => { sig.dispose(); }, 5000);
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* for await (const _ of sig) {
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* console.log("SIGTERM!")
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* }
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*
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* The above for-await loop exits after 5 seconds when sig.dispose() is called.
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*/
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export function signal(signo: number): SignalStream {
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if (build.os === "win") {
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throw new Error("not implemented!");
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}
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return new SignalStream(signo);
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}
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export const signals = {
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/** Returns the stream of SIGALRM signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGALRM). */
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alarm(): SignalStream {
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return signal(Signal.SIGALRM);
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},
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/** Returns the stream of SIGCHLD signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGCHLD). */
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child(): SignalStream {
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return signal(Signal.SIGCHLD);
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},
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/** Returns the stream of SIGHUP signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGHUP). */
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hungup(): SignalStream {
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return signal(Signal.SIGHUP);
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},
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/** Returns the stream of SIGINT signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGINT). */
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interrupt(): SignalStream {
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return signal(Signal.SIGINT);
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},
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/** Returns the stream of SIGIO signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGIO). */
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io(): SignalStream {
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return signal(Signal.SIGIO);
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},
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/** Returns the stream of SIGPIPE signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGPIPE). */
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pipe(): SignalStream {
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return signal(Signal.SIGPIPE);
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},
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/** Returns the stream of SIGQUIT signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGQUIT). */
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quit(): SignalStream {
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return signal(Signal.SIGQUIT);
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},
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/** Returns the stream of SIGTERM signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGTERM). */
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terminate(): SignalStream {
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return signal(Signal.SIGTERM);
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},
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/** Returns the stream of SIGUSR1 signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGUSR1). */
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userDefined1(): SignalStream {
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return signal(Signal.SIGUSR1);
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},
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/** Returns the stream of SIGUSR2 signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGUSR2). */
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userDefined2(): SignalStream {
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return signal(Signal.SIGUSR2);
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},
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/** Returns the stream of SIGWINCH signals.
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* This method is the shorthand for Deno.signal(Deno.Signal.SIGWINCH). */
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windowChange(): SignalStream {
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return signal(Signal.SIGWINCH);
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}
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};
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/** SignalStream represents the stream of signals, implements both
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* AsyncIterator and PromiseLike */
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export class SignalStream implements AsyncIterator<void>, PromiseLike<void> {
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private rid: number;
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/** The promise of polling the signal,
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* resolves with false when it receives signal,
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* Resolves with true when the signal stream is disposed. */
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private pollingPromise: Promise<boolean> = Promise.resolve(false);
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/** The flag, which is true when the stream is disposed. */
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private disposed = false;
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constructor(signo: number) {
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this.rid = sendSync(dispatch.OP_SIGNAL_BIND, { signo }).rid;
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this.loop();
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}
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private async pollSignal(): Promise<boolean> {
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return (
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await sendAsync(dispatch.OP_SIGNAL_POLL, {
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rid: this.rid
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})
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).done;
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}
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private async loop(): Promise<void> {
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do {
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this.pollingPromise = this.pollSignal();
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} while (!(await this.pollingPromise) && !this.disposed);
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}
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then<T, S>(
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f: (v: void) => T | Promise<T>,
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g?: (v: Error) => S | Promise<S>
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): Promise<T | S> {
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return this.pollingPromise.then((_): void => {}).then(f, g);
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}
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async next(): Promise<IteratorResult<void>> {
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return { done: await this.pollingPromise, value: undefined };
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}
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[Symbol.asyncIterator](): AsyncIterator<void> {
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return this;
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}
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dispose(): void {
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if (this.disposed) {
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throw new Error("The stream has already been disposed.");
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}
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this.disposed = true;
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sendSync(dispatch.OP_SIGNAL_UNBIND, { rid: this.rid });
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}
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}
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@ -42,6 +42,7 @@ import "./read_link_test.ts";
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import "./rename_test.ts";
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import "./request_test.ts";
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import "./resources_test.ts";
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import "./signal_test.ts";
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import "./stat_test.ts";
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import "./symbols_test.ts";
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import "./symlink_test.ts";
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@ -44,7 +44,7 @@ mod progress;
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mod repl;
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pub mod resolve_addr;
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mod shell;
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mod signal;
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pub mod signal;
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pub mod source_maps;
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mod startup_data;
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pub mod state;
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|
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@ -22,6 +22,7 @@ pub mod random;
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pub mod repl;
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pub mod resources;
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pub mod runtime_compiler;
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pub mod signal;
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pub mod timers;
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pub mod tls;
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pub mod web_worker;
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|
|
146
cli/ops/signal.rs
Normal file
146
cli/ops/signal.rs
Normal file
|
@ -0,0 +1,146 @@
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use super::dispatch_json::{JsonOp, Value};
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use crate::ops::json_op;
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use crate::state::ThreadSafeState;
|
||||
use deno_core::*;
|
||||
|
||||
#[cfg(unix)]
|
||||
use super::dispatch_json::Deserialize;
|
||||
#[cfg(unix)]
|
||||
use crate::deno_error::bad_resource;
|
||||
#[cfg(unix)]
|
||||
use deno_core::Resource;
|
||||
#[cfg(unix)]
|
||||
use futures::future::{poll_fn, FutureExt};
|
||||
#[cfg(unix)]
|
||||
use serde_json;
|
||||
#[cfg(unix)]
|
||||
use std::task::Waker;
|
||||
#[cfg(unix)]
|
||||
use tokio::signal::unix::{signal, Signal, SignalKind};
|
||||
|
||||
pub fn init(i: &mut Isolate, s: &ThreadSafeState) {
|
||||
i.register_op(
|
||||
"signal_bind",
|
||||
s.core_op(json_op(s.stateful_op(op_signal_bind))),
|
||||
);
|
||||
i.register_op(
|
||||
"signal_unbind",
|
||||
s.core_op(json_op(s.stateful_op(op_signal_unbind))),
|
||||
);
|
||||
i.register_op(
|
||||
"signal_poll",
|
||||
s.core_op(json_op(s.stateful_op(op_signal_poll))),
|
||||
);
|
||||
}
|
||||
|
||||
#[cfg(unix)]
|
||||
/// The resource for signal stream.
|
||||
/// The second element is the waker of polling future.
|
||||
pub struct SignalStreamResource(pub Signal, pub Option<Waker>);
|
||||
|
||||
#[cfg(unix)]
|
||||
impl Resource for SignalStreamResource {}
|
||||
|
||||
#[cfg(unix)]
|
||||
#[derive(Deserialize)]
|
||||
struct BindSignalArgs {
|
||||
signo: i32,
|
||||
}
|
||||
|
||||
#[cfg(unix)]
|
||||
#[derive(Deserialize)]
|
||||
struct SignalArgs {
|
||||
rid: i32,
|
||||
}
|
||||
|
||||
#[cfg(unix)]
|
||||
fn op_signal_bind(
|
||||
state: &ThreadSafeState,
|
||||
args: Value,
|
||||
_zero_copy: Option<PinnedBuf>,
|
||||
) -> Result<JsonOp, ErrBox> {
|
||||
let args: BindSignalArgs = serde_json::from_value(args)?;
|
||||
let mut table = state.lock_resource_table();
|
||||
let rid = table.add(
|
||||
"signal",
|
||||
Box::new(SignalStreamResource(
|
||||
signal(SignalKind::from_raw(args.signo)).expect(""),
|
||||
None,
|
||||
)),
|
||||
);
|
||||
Ok(JsonOp::Sync(json!({
|
||||
"rid": rid,
|
||||
})))
|
||||
}
|
||||
|
||||
#[cfg(unix)]
|
||||
fn op_signal_poll(
|
||||
state: &ThreadSafeState,
|
||||
args: Value,
|
||||
_zero_copy: Option<PinnedBuf>,
|
||||
) -> Result<JsonOp, ErrBox> {
|
||||
let args: SignalArgs = serde_json::from_value(args)?;
|
||||
let rid = args.rid as u32;
|
||||
let state_ = state.clone();
|
||||
|
||||
let future = poll_fn(move |cx| {
|
||||
let mut table = state_.lock_resource_table();
|
||||
if let Some(mut signal) = table.get_mut::<SignalStreamResource>(rid) {
|
||||
signal.1 = Some(cx.waker().clone());
|
||||
return signal.0.poll_recv(cx);
|
||||
}
|
||||
std::task::Poll::Ready(None)
|
||||
})
|
||||
.then(|result| async move { Ok(json!({ "done": result.is_none() })) });
|
||||
|
||||
Ok(JsonOp::AsyncUnref(future.boxed()))
|
||||
}
|
||||
|
||||
#[cfg(unix)]
|
||||
pub fn op_signal_unbind(
|
||||
state: &ThreadSafeState,
|
||||
args: Value,
|
||||
_zero_copy: Option<PinnedBuf>,
|
||||
) -> Result<JsonOp, ErrBox> {
|
||||
let args: SignalArgs = serde_json::from_value(args)?;
|
||||
let rid = args.rid as u32;
|
||||
let mut table = state.lock_resource_table();
|
||||
let resource = table.get::<SignalStreamResource>(rid);
|
||||
if let Some(signal) = resource {
|
||||
if let Some(waker) = &signal.1 {
|
||||
// Wakes up the pending poll if exists.
|
||||
// This prevents the poll future from getting stuck forever.
|
||||
waker.clone().wake();
|
||||
}
|
||||
}
|
||||
table.close(rid).ok_or_else(bad_resource)?;
|
||||
Ok(JsonOp::Sync(json!({})))
|
||||
}
|
||||
|
||||
#[cfg(not(unix))]
|
||||
pub fn op_signal_bind(
|
||||
_state: &ThreadSafeState,
|
||||
_args: Value,
|
||||
_zero_copy: Option<PinnedBuf>,
|
||||
) -> Result<JsonOp, ErrBox> {
|
||||
unimplemented!();
|
||||
}
|
||||
|
||||
#[cfg(not(unix))]
|
||||
fn op_signal_unbind(
|
||||
_state: &ThreadSafeState,
|
||||
_args: Value,
|
||||
_zero_copy: Option<PinnedBuf>,
|
||||
) -> Result<JsonOp, ErrBox> {
|
||||
unimplemented!();
|
||||
}
|
||||
|
||||
#[cfg(not(unix))]
|
||||
fn op_signal_poll(
|
||||
_state: &ThreadSafeState,
|
||||
_args: Value,
|
||||
_zero_copy: Option<PinnedBuf>,
|
||||
) -> Result<JsonOp, ErrBox> {
|
||||
unimplemented!();
|
||||
}
|
|
@ -1,3 +1,4 @@
|
|||
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
|
||||
use deno_core::ErrBox;
|
||||
|
||||
#[cfg(unix)]
|
||||
|
|
|
@ -200,6 +200,7 @@ impl MainWorker {
|
|||
ops::random::init(&mut isolate, &state);
|
||||
ops::repl::init(&mut isolate, &state);
|
||||
ops::resources::init(&mut isolate, &state);
|
||||
ops::signal::init(&mut isolate, &state);
|
||||
ops::timers::init(&mut isolate, &state);
|
||||
ops::worker_host::init(&mut isolate, &state);
|
||||
ops::web_worker::init(&mut isolate, &state);
|
||||
|
|
|
@ -428,6 +428,39 @@ Uncaught NotFound: No such file or directory (os error 2)
|
|||
at handleAsyncMsgFromRust (deno/js/dispatch.ts:27:17)
|
||||
```
|
||||
|
||||
### Handle OS Signals
|
||||
|
||||
[API Reference](https://deno.land/typedoc/index.html#signal)
|
||||
|
||||
You can use `Deno.signal()` function for handling OS signals.
|
||||
|
||||
```
|
||||
for await (const _ of Deno.signal(Deno.Signal.SIGINT)) {
|
||||
console.log("interrupted!");
|
||||
}
|
||||
```
|
||||
|
||||
`Deno.signal()` also works as a promise.
|
||||
|
||||
```
|
||||
await Deno.signal(Deno.Singal.SIGINT);
|
||||
console.log("interrupted!");
|
||||
```
|
||||
|
||||
If you want to stop watching the signal, you can use `dispose()` method of the
|
||||
signal object.
|
||||
|
||||
```
|
||||
const sig = Deno.signal(Deno.Signal.SIGINT);
|
||||
setTimeout(() => { sig.dispose(); }, 5000);
|
||||
|
||||
for await (const _ of sig) {
|
||||
console.log("interrupted");
|
||||
}
|
||||
```
|
||||
|
||||
The above for-await loop exits after 5 seconds when sig.dispose() is called.
|
||||
|
||||
### Linking to third party code
|
||||
|
||||
In the above examples, we saw that Deno could execute scripts from URLs. Like
|
||||
|
|
Loading…
Reference in a new issue