Re: CUPS - how to match autodetected printers to physical ones

[Brian <ad44@cityscape.co.uk>]

On Mon 11 Apr 2022 at 13:04:12 -0400, Greg Wooledge wrote:

> On Mon, Apr 11, 2022 at 05:47:07PM +0100, Brian wrote:
> > What does
> > 
> >    avahi-browse -rt _ipp._tcp | grep -B3 port
> > 
> > give for this device?
> 
> =   eno1 IPv4 Canon LBP351dn (f9:7a:4a)                     Internet Printer     local
>    hostname = [dhcp-10-76-172-100.local]
>    address = [10.76.172.100]
>    port = [631]
> 
> And for completeness:
> 
> wooledg:~$ avahi-resolve -n dhcp-10-76-172-100.local
> dhcp-10-76-172-100.local	10.76.172.100

Thanks. I completly forgot: CUPS constructs a destination from a
printer's Service (Bonjour) Name by replacing a dash (-) with an
underscore (_). It then adds an underscore (_) to the end. (It
has stopped doing the latter in the most recent version, I thnk).

I will scub the third method. It is too involved to explain how
to reverse what is in the implicitclass URI just for resolving.
avahi-browse seems the way to go for your purpose.

BTW. I am interested in how using /usr/lib/cups/backend/snmp went.
Its drawback is that not all printers provide an snmp service.

-- 
Brian.