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'use strict';
const {
ERR_STDERR_CLOSE,
ERR_STDOUT_CLOSE,
ERR_UNKNOWN_STDIN_TYPE,
ERR_UNKNOWN_STREAM_TYPE
} = require('internal/errors').codes;
const { isMainThread } = require('internal/worker');
exports.setup = setupStdio;
function setupStdio() {
var stdin;
var stdout;
var stderr;
function getStdout() {
if (stdout) return stdout;
if (!isMainThread)
return new (require('stream').Writable)({ write(b, e, cb) { cb(); } });
stdout = createWritableStdioStream(1);
stdout.destroySoon = stdout.destroy;
stdout._destroy = function(er, cb) {
// Avoid errors if we already emitted
er = er || new ERR_STDOUT_CLOSE();
cb(er);
};
if (stdout.isTTY) {
process.on('SIGWINCH', () => stdout._refreshSize());
}
return stdout;
}
function getStderr() {
if (stderr) return stderr;
if (!isMainThread)
return new (require('stream').Writable)({ write(b, e, cb) { cb(); } });
stderr = createWritableStdioStream(2);
stderr.destroySoon = stderr.destroy;
stderr._destroy = function(er, cb) {
// Avoid errors if we already emitted
er = er || new ERR_STDERR_CLOSE();
cb(er);
};
if (stderr.isTTY) {
process.on('SIGWINCH', () => stderr._refreshSize());
}
return stderr;
}
function getStdin() {
if (stdin) return stdin;
if (!isMainThread)
return new (require('stream').Readable)({ read() { this.push(null); } });
const tty_wrap = process.binding('tty_wrap');
const fd = 0;
switch (tty_wrap.guessHandleType(fd)) {
case 'TTY':
var tty = require('tty');
stdin = new tty.ReadStream(fd, {
highWaterMark: 0,
readable: true,
writable: false
});
break;
case 'FILE':
var fs = require('fs');
stdin = new fs.ReadStream(null, { fd: fd, autoClose: false });
break;
case 'PIPE':
case 'TCP':
var net = require('net');
// It could be that process has been started with an IPC channel
// sitting on fd=0, in such case the pipe for this fd is already
// present and creating a new one will lead to the assertion failure
// in libuv.
if (process.channel && process.channel.fd === fd) {
stdin = new net.Socket({
handle: process.channel,
readable: true,
writable: false,
manualStart: true
});
} else {
stdin = new net.Socket({
fd: fd,
readable: true,
writable: false,
manualStart: true
});
}
// Make sure the stdin can't be `.end()`-ed
stdin._writableState.ended = true;
break;
default:
// Probably an error on in uv_guess_handle()
throw new ERR_UNKNOWN_STDIN_TYPE();
}
// For supporting legacy API we put the FD here.
stdin.fd = fd;
// stdin starts out life in a paused state, but node doesn't
// know yet. Explicitly to readStop() it to put it in the
// not-reading state.
if (stdin._handle && stdin._handle.readStop) {
stdin._handle.reading = false;
stdin._readableState.reading = false;
stdin._handle.readStop();
}
// If the user calls stdin.pause(), then we need to stop reading
// once the stream implementation does so (one nextTick later),
// so that the process can close down.
stdin.on('pause', () => {
process.nextTick(onpause);
});
function onpause() {
if (!stdin._handle)
return;
if (stdin._handle.reading && !stdin._readableState.flowing) {
stdin._readableState.reading = false;
stdin._handle.reading = false;
stdin._handle.readStop();
}
}
return stdin;
}
Object.defineProperty(process, 'stdout', {
configurable: true,
enumerable: true,
get: getStdout
});
Object.defineProperty(process, 'stderr', {
configurable: true,
enumerable: true,
get: getStderr
});
Object.defineProperty(process, 'stdin', {
configurable: true,
enumerable: true,
get: getStdin
});
process.openStdin = function() {
process.stdin.resume();
return process.stdin;
};
}
function createWritableStdioStream(fd) {
var stream;
const tty_wrap = process.binding('tty_wrap');
// Note stream._type is used for test-module-load-list.js
switch (tty_wrap.guessHandleType(fd)) {
case 'TTY':
var tty = require('tty');
stream = new tty.WriteStream(fd);
stream._type = 'tty';
break;
case 'FILE':
const SyncWriteStream = require('internal/fs/sync_write_stream');
stream = new SyncWriteStream(fd, { autoClose: false });
stream._type = 'fs';
break;
case 'PIPE':
case 'TCP':
var net = require('net');
stream = new net.Socket({
fd: fd,
readable: false,
writable: true
});
stream._type = 'pipe';
break;
default:
// Probably an error on in uv_guess_handle()
throw new ERR_UNKNOWN_STREAM_TYPE();
}
// For supporting legacy API we put the FD here.
stream.fd = fd;
stream._isStdio = true;
return stream;
}
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