PID file.

Interface IPIDFile Manages a file that remembers a process ID.
Class PIDFile Concrete implementation of IPIDFile based on IFilePath.
Class NonePIDFile PID file implementation that does nothing.
Class AlreadyRunningError Process is already running.
Class InvalidPIDFileError PID file contents are invalid.
Class StalePIDFileError PID file contents are valid, but there is no process with the referenced PID.
Class NoPIDFound No PID found in PID file.
API Documentation for Twisted, generated by pydoctor at 2019-08-06 12:10:50.