inotifyd

When a filesystem event matching MASK occurs to a FILE, run PROG as: PROG EVENTS FILE [DIRFILE] If PROG is "-" events are sent to stdout. This file is: a accessed c modified e metadata change w closed (writable) r opened D deleted M moved 0 closed (unwritable) u unmounted o overflow x unwatchable A file in this directory is: m moved in y moved out n created d deleted When x event happens for all FILEs, inotifyd exits (after waiting for PROG).

inotifyd PROG FILE[:MASK] ...