'/bin/sh' on UNIX, and 'cmd.exe' on Windows. A different shell can be

specified as a string. The shell should understand the `-c` switch on UNIX,

or `/s /c` on Windows. Defaults to `false` (no shell).

The `child_process.spawn()` method spawns a new process using the given

`command`, with command line arguments in `args`. If omitted, `args` defaults

* `maxBuffer` {Number} largest amount of data (in bytes) allowed on stdout or

stderr - if exceeded child process is killed

* `encoding` {String} The encoding used for all stdio inputs and outputs. (Default: 'buffer')

The `child_process.execFileSync()` method is generally identical to

`child_process.execFile()` with the exception that the method will not return

* `maxBuffer` {Number} largest amount of data (in bytes) allowed on stdout or

stderr - if exceeded child process is killed

* `encoding` {String} The encoding used for all stdio inputs and outputs. (Default: 'buffer')

The `child_process.execSync()` method is generally identical to

`child_process.exec()` with the exception that the method will not return until

'/bin/sh' on UNIX, and 'cmd.exe' on Windows. A different shell can be

specified as a string. The shell should understand the `-c` switch on UNIX,

or `/s /c` on Windows. Defaults to `false` (no shell).

* `pid` {Number} Pid of the child process

* `output` {Array} Array of results from stdio output

* `stdout` {Buffer|String} The contents of `output[1]`