Nut upsuser - Apr 2022 - Formal definition of a UPS name

Do we have a formal definition of a UPS name?  For example:

   upsname = "A-Ca-c-_"+ with a minimum of 1 and a maximum of 15
characters

This means that a UPS may be called "_"

Is that acceptable?   Must the initial character always be a letter? Roger

On Tue, 5 Apr 2022, Roger Price wrote:
> Do we have a formal definition of a UPS name?  For example:
>
>  upsname = "A-Ca-c-_"+ with a minimum of 1 and a maximum of 15
characters
I should have written

   upsname = "A-Ca-c0-9-_"+ with a minimum of 1 and a maximum of 15
characters

where the initial character is a letter or a number.  Roger

On Tuesday, 5 April 2022 09:40:41 EDT Roger Price wrote:
> Do we have a formal definition of a UPS name?  For example:
> 
>    upsname = "A-Ca-c-_"+ with a minimum of 1 and a maximum of 15
> characters
> 
> This means that a UPS may be called "_"
> 
> Is that acceptable?   Must the initial character always be a letter?
> Roger
> 
I think that was/is inherited from dns/bind, at least no network name can 
begin with a number, which I found did not work for a hostname on my 
local network even using hosts files. The machine it runs is sold as a 
6040 milling machine but I had to name it sixty40 before I could make it 
network.

A ups can and often is, a network device addressable by the usual ipv4 
local address, so if you want it to be resolved it must start with a 
alpha charactor. There is an rfc for that I'm sure but I can't quote it.

My systems are all usb interfaces, and are happy with the default
"myups"
for a name, but aren't network accessible without going thru ssh first to 
get to the machine its actually plugged into.

Cheers, Gene Heskett.
-- 
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 - Louis D. Brandeis