[systemd-devel] Service reactivation with device plugging

[Rob Spanton]

Hi,

I wrote:
> I was recently working on an embedded system that had a daemon
> [ ...which] needed to be run when both [serial] devices were plugged
> in.  If any of the devices was unplugged, the daemon would exit, and
> would need to be restarted the next time both devices were plugged in.

Auke wrote:
> why not write a middle-man layer that uses socket activation?

My understanding of socket activation is that it is for starting a
service when something attempts to connect to a socket.  I don't
understand how this relates to my situation with two serial devices.

> alternatively, you could use inotify and immediately start your
> daemon.

Presumably you mean by writing a second daemon that uses inotify?  Yes,
I can see that this would solve my problem, however I was wondering
whether there was a simpler way of doing it just using systemd.

Cheers,

Rob
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