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| Current File : //proc/self/root/home/ubuntu/node-v16.18.1/test/sequential/test-child-process-pass-fd.js |
'use strict';
const common = require('../common');
// On some OS X versions, when passing fd's between processes:
// When the handle associated to a specific file descriptor is closed by the
// sender process before it's received in the destination, the handle is indeed
// closed while it should remain opened. In order to fix this behavior, don't
// close the handle until the `NODE_HANDLE_ACK` is received by the sender.
// This test is basically `test-cluster-net-send` but creating lots of workers
// so the issue reproduces on OS X consistently.
if (common.isPi) {
common.skip('Too slow for Raspberry Pi devices');
}
const assert = require('assert');
const { fork } = require('child_process');
const net = require('net');
const N = 80;
let messageCallbackCount = 0;
function forkWorker() {
const messageCallback = (msg, handle) => {
messageCallbackCount++;
assert.strictEqual(msg, 'handle');
assert.ok(handle);
worker.send('got');
let recvData = '';
handle.on('data', common.mustCall((data) => {
recvData += data;
}));
handle.on('end', () => {
assert.strictEqual(recvData, 'hello');
worker.kill();
});
};
const worker = fork(__filename, ['child']);
worker.on('error', (err) => {
if (/\bEAGAIN\b/.test(err.message)) {
forkWorker();
return;
}
throw err;
});
worker.once('message', messageCallback);
}
if (process.argv[2] !== 'child') {
for (let i = 0; i < N; ++i) {
forkWorker();
}
process.on('exit', () => { assert.strictEqual(messageCallbackCount, N); });
} else {
let socket;
let cbcalls = 0;
function socketConnected() {
if (++cbcalls === 2)
process.send('handle', socket);
}
// As a side-effect, listening for the message event will ref the IPC channel,
// so the child process will stay alive as long as it has a parent process/IPC
// channel. Once this is done, we can unref our client and server sockets, and
// the only thing keeping this worker alive will be IPC. This is important,
// because it means a worker with no parent will have no referenced handles,
// thus no work to do, and will exit immediately, preventing process leaks.
process.on('message', common.mustCall());
const server = net.createServer((c) => {
process.once('message', (msg) => {
assert.strictEqual(msg, 'got');
c.end('hello');
});
socketConnected();
}).unref();
server.listen(0, common.localhostIPv4, () => {
const { port } = server.address();
socket = net.connect(port, common.localhostIPv4, socketConnected).unref();
});
}
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