* `options` {Object}

* `cwd` {String} Current working directory of the child process

* `env` {Object} Environment key-value pairs

* `argv0` {String} Explicitly set the value of `argv[0]` sent to the child

process. This will be set to `command` if not specified.

* `stdio` {Array|String} Child's stdio configuration. (See

[`options.stdio`][`stdio`])

* `detached` {Boolean} Prepare child to run independently of its parent

});

```

*Note: Certain platforms (OS X, Linux) will use the value of `argv[0]` for the

process title while others (Windows, SunOS) will use `command`.*

*Note: Node.js currently overwrites `argv[0]` with `process.execPath` on

startup, so `process.argv[0]` in a Node.js child process will not match the

`argv0` parameter passed to `spawn` from the parent, retrieve it with the

`process.argv0` property instead.*

#### options.detached

<!-- YAML

added: v0.7.10

}

}

args.unshift(file);

if (typeof options.argv0 === 'string') {

args.unshift(options.argv0);

} else {

args.unshift(file);

}

var env = options.env || process.env;

var envPairs = [];

'use strict';

require('../common');

const assert = require('assert');

const cp = require('child_process');

// This test spawns itself with an argument to indicate when it is a child to

// easily and portably print the value of argv[0]

if (process.argv[2] === 'child') {

console.log(process.argv0);

return;

}

const noArgv0 = cp.spawnSync(process.execPath, [__filename, 'child']);

assert.strictEqual(noArgv0.stdout.toString().trim(), process.execPath);

const withArgv0 = cp.spawnSync(process.execPath, [__filename, 'child'],

{argv0: 'withArgv0'});

assert.strictEqual(withArgv0.stdout.toString().trim(), 'withArgv0');