Re: [9fans] A couple questions about /dev/draw and /dev/kbmap

[Dave MacFarlane <driusan@gmail.com>]

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In that case, is there any way to get the current max packet size that 9p
will allow for
a read or write, or to determine if you're drawing to a local machine or
not? I'm not seeing anything obvious under /dev or /env.

On Wed, May 4, 2016 at 10:45 PM, <cinap_lenrek@felloff.net> wrote:

> you wont have that limitation on devdraw on the local machine. but
> over 9p, your reads and writes are limited by the iounit of the
> channel over which 9p is transfered.
>
> the reson for having a iounit is that you'r not the only one doing
> stuff over the channel. you chunk stuff up in packets, so multiple
> things can appear as simultanious even tho theres only one serial
> channel. the bigger you make the packets, the bigger the latency
> for concurrent packets wanting to be transmitted.
>
> for the keyboard stuff. you cant do that with /dev/cons. drawterm
> only gives you runes, but no kbmap (you'r probably seeing the cpu
> servers kbmap, not the one in drawterm). in 9front [1,2], theres
> /dev/kbd [3] which also gives you button states.
>
> [1] http://9front.org/
> [2] http://drawterm.9front.org/
> [3] http://man.9front.org/8/kbdfs
>
> --
> cinap
>
>


--
- Dave

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