- {string}
The subprocess.spawnfile
property indicates the executable file name of
the child process that is launched.
For [child_process.fork()
][], its value will be equal to
[process.execPath
][].
For [child_process.spawn()
][], its value will be the name of
the executable file.
For [child_process.exec()
][], its value will be the name of the shell
in which the child process is launched.