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)
