[systemd-devel] sd_event_add_io with EPOLLPRI option

[Lennart Poettering]

On Do, 24.08.17 10:24, Yong Li (sdliyong at gmail.com) wrote:

> I found the root cause: I did not read the data in my callback function!
> Note that an event source set to SD_EVENT_ON will fire continuously
> unless data is read from or written to the file descriptor to reset
> the mask of events seen.

BTW, you can use SD_EVENT_ONESHOT for events that shall be fired only
once, and are disabled automatically for the next iteration when its
callback is invoked.

Lennart

-- 
Lennart Poettering, Red Hat