* `options` {Object}

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

**Default:** `null`.

* `encoding` {string} **Default:** `'utf8'`

* `shell` {string} Shell to execute the command with. See

[Shell Requirements][] and [Default Windows Shell][]. **Default:**

* `args` {string[]} List of string arguments.

* `options` {Object}

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

* `encoding` {string} **Default:** `'utf8'`

* `timeout` {number} **Default:** `0`

* `maxBuffer` {number} Largest amount of data in bytes allowed on stdout or

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

process. Specific behavior depends on the platform, see

[`options.detached`][]).

* `execPath` {string} Executable used to create the child process.

* `execArgv` {string[]} List of string arguments passed to the executable.

**Default:** `process.execArgv`.

* `args` {string[]} List of string arguments.

* `options` {Object}

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

* `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

* `stdio` {string|Array} Child's stdio configuration. `stderr` by default will

be output to the parent process' stderr unless `stdio` is specified.

**Default:** `'pipe'`.

* `uid` {number} Sets the user identity of the process (see setuid(2)).

* `gid` {number} Sets the group identity of the process (see setgid(2)).

* `timeout` {number} In milliseconds the maximum amount of time the process

* `stdio` {string|Array} Child's stdio configuration. `stderr` by default will

be output to the parent process' stderr unless `stdio` is specified.

**Default:** `'pipe'`.

* `shell` {string} Shell to execute the command with. See

[Shell Requirements][] and [Default Windows Shell][]. **Default:**

`'/bin/sh'` on Unix, `process.env.ComSpec` on Windows.

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

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

* `stdio` {string|Array} Child's stdio configuration.

* `uid` {number} Sets the user identity of the process (see setuid(2)).

* `gid` {number} Sets the group identity of the process (see setgid(2)).

* `timeout` {number} In milliseconds the maximum amount of time the process