def AddMonitor(self, path, obj, handleID=None): # strip trailing slashes path = path.rstrip("/") if not self.started: self.add_q.append((path, obj)) return path if not os.path.isdir(path): # inotify is a little wonky about watching files. for # instance, if you watch /tmp/foo, and then do 'mv # /tmp/bar /tmp/foo', it processes that as a deletion of # /tmp/foo (which it technically _is_, but that's rather # useless -- we care that /tmp/foo changed, not that it # was first deleted and then created). In order to # effectively watch a file, we have to watch the directory # it's in, and filter out events for other files in the # same directory that are not similarly watched. # watch_transient_file requires a Processor _class_, not # an object, so we can't have this object handle events, # which is Wrong, so we can't use that function. watch_path = os.path.dirname(path) is_dir = False else: watch_path = path is_dir = True # see if this path is already being watched try: watchdir = self.watches_by_path[watch_path] except KeyError: if not os.path.exists(watch_path): raise OSError(errno.ENOENT, "No such file or directory: '%s'" % path) watchdir = self.watchmgr.add_watch(watch_path, self.mask, quiet=False)[watch_path] self.watches_by_path[watch_path] = watchdir produce_exists = True if not is_dir: if watchdir not in self.event_filter: self.event_filter[watchdir] = [path] elif path not in self.event_filter[watchdir]: self.event_filter[watchdir].append(path) else: # we've been asked to watch a file that we're already # watching, so we don't need to produce 'exists' # events produce_exists = False # inotify doesn't produce initial 'exists' events, so we # inherit from Pseudo to produce those if produce_exists: return Pseudo.AddMonitor(self, path, obj, handleID=path) else: self.handles[path] = obj return path
def AddMonitor(self, path, obj): res = self.wm.add_watch(path, self.mask, quiet=False) if not res: # if we didn't get a return, but we also didn't get an # exception, we're already watching this directory, so we # need to find the watch descriptor for it for wd, watch in self.wm.watches.items(): if watch.path == path: wd = watch.wd else: wd = res[path] # inotify doesn't produce initial 'exists' events, so we # inherit from Pseudo to produce those return Pseudo.AddMonitor(self, path, obj, handleID=wd)