Interface to the Sage cleaner

Triva Note: For the name “sage-cleaner”, think of the “The Cleaner” from Pulp Fiction: http://www.frankjankowski.de/quiz/illus/keitel.jpg

sage.interfaces.cleaner.cleaner(pid, cmd='')

Write a line to the spawned_processes file with the given pid and cmd.

sage.interfaces.cleaner.start_cleaner()

Start sage-cleaner in a new process group.