Package service provides a simple way to create a system service. Currently supports Windows, Linux/(systemd | Upstart | SysV), and OSX/Launchd. Windows controls services by setting up callbacks that is non-trivial. This is very different then other systems. This package provides the same API despite the substantial differences. It also can be used to detect how a program is called, from an interactive terminal or from a service manager. Examples in the example/ folder.