> fs:start_link(fs_watcher, "/Users/5HT/synrc/fs"). % need to start the fs watcher
> fs:subscribe(fs_watcher). % the pid will receive events as messages
> flush().
Shell got {<0.47.0>,
           {fs,file_event},
           {"/Users/5HT/synrc/fs/src/README.md",[closed,modified]}}

> fs:known_events(fs_watcher). % returns events known by your backend
[mustscansubdirs,userdropped,kerneldropped,eventidswrapped,
 historydone,rootchanged,mount,unmount,created,removed,
 inodemetamod,renamed,modified,finderinfomod,changeowner,
 xattrmod,isfile,isdir,issymlink,ownevent]

> fs:start_looper(). % starts a sample process that logs events
=INFO REPORT==== 28-Aug-2013::19:36:26 ===
file_event: "/tank/proger/erlfsmon/src/4913" [closed,modified]