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Code Issues Packages 1 Wiki Activity

fix(node): track SIG* listeners in process.listeners (#23890)

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Some npm libraries like `signal-exit` rely on the length of the listener
array returned by `process.listeners("SIGNT")` to be correct to
function. We weren't tracking `SIG*` events there, which broke those npm
libraries.

Fixes https://github.com/denoland/deno/issues/22892
This commit is contained in:
Marvin Hagemeister 2024-05-20 15:24:13 +02:00 committed by GitHub
parent d7709daaa0
commit fb3f82b9ea
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2 changed files with 19 additions and 0 deletions
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3
ext/node/polyfills/process.ts
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@ -469,6 +469,7 @@ Process.prototype.on = function (
} else if (event === "SIGTERM" && Deno.build.os === "windows") {
// Ignores SIGTERM on windows.
} else {
EventEmitter.prototype.on.call(this, event, listener);
Deno.addSignalListener(event as Deno.Signal, listener);
}
} else {
@ -494,6 +495,7 @@ Process.prototype.off = function (
} else if (event === "SIGTERM" && Deno.build.os === "windows") {
// Ignores SIGTERM on windows.
} else {
EventEmitter.prototype.off.call(this, event, listener);
Deno.removeSignalListener(event as Deno.Signal, listener);
}
} else {
@ -537,6 +539,7 @@ Process.prototype.prependListener = function (
if (event === "SIGBREAK" && Deno.build.os !== "windows") {
// Ignores SIGBREAK if the platform is not windows.
} else {
EventEmitter.prototype.prependListener.call(this, event, listener);
Deno.addSignalListener(event as Deno.Signal, listener);
}
} else {

16
tests/unit_node/process_test.ts
View file

@ -1108,3 +1108,19 @@ Deno.test({
process.constructor.call({});
},
});
// Test for https://github.com/denoland/deno/issues/22892
Deno.test("process.listeners - include SIG* events", () => {
const listener = () => console.log("SIGINT");
process.on("SIGINT", listener);
assertEquals(process.listeners("SIGINT").length, 1);
const listener2 = () => console.log("SIGINT");
process.prependListener("SIGINT", listener2);
assertEquals(process.listeners("SIGINT").length, 2);
process.off("SIGINT", listener);
assertEquals(process.listeners("SIGINT").length, 1);
process.off("SIGINT", listener2);
assertEquals(process.listeners("SIGINT").length, 0);
});