* `cwd` {String} Current working directory of the child process
* `env` {Object} Environment key-value pairs
* `encoding` {String} (Default: 'utf8')
+ * `execPath` {String} Executable used to create the child process
* Return: ChildProcess object
This is a special case of the `spawn()` functionality for spawning Node
startup and 10mb memory for each new Node. That is, you cannot create many
thousands of them.
+The `execPath` property in the `options` object allows for a process to be
+created for the child rather than the current `node` executable. This should be
+done with care and by default will talk over the fd represented an
+environmental variable `NODE_CHANNEL_FD` on the child process. The input and
+output on this fd is expected to be line delimited JSON objects.
+
[EventEmitter]: events.html#events_class_events_eventemitter
--- /dev/null
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var assert = require('assert');
+var cp = require('child_process');
+var fs = require('fs');
+var path = require('path');
+var common = require('../common');
+var msg = {test: 'this'};
+var nodePath = process.execPath;
+var symlinkPath = path.join(common.tmpDir, 'node-symlink');
+
+if (process.env.FORK) {
+ assert(process.send);
+ assert.equal(process.argv[0], symlinkPath);
+ process.send(msg);
+ process.exit();
+}
+else {
+ try {
+ fs.unlinkSync(symlinkPath);
+ }
+ catch (e) {
+ if (e.code !== 'ENOENT') throw e;
+ }
+ fs.symlinkSync(nodePath, symlinkPath);
+
+ var child = require('child_process').fork(__filename, {
+ execPath: symlinkPath,
+ env: { FORK: 'true' }
+ });
+ child.on('message', common.mustCall(function(recv) {
+ assert.deepEqual(msg, recv);
+ }));
+ child.on('exit', common.mustCall(function(code) {
+ fs.unlinkSync(symlinkPath);
+ assert.equal(code, 0);
+ }));
+}