Only file-system events (EVFILT_VNODE) are supported.
(with-kqueue (kqueue `(("/tmp/test" ,(logior note-write note-attrib))))
(read-events kqueue))
blocks
$ echo x >> /tmp/test
=>
(#<EVENT #P"/tmp/test" flags: NOTE-WRITE>)
The flags are only printed using names, the actual values are integers.
An easy way to check for multiple events:
(member (logior note-write note-read)
events
:key #'event-flag
:test #'logtest)
With a timeout:
(with-kqueue (kqueue `(("/tmp/test" ,(logior note-write note-attrib))))
(loop for events = (read-events kqueue :timeout 1)
thereis events
do (write-line "timed out")))
timed out
timed out
$ echo 10 >> /tmp/test
=>
(#<EVENT #P"/tmp/test" flags: NOTE-WRITE>)
See also https://github.com/stassats/inotify