Re: [9fans] Content of your /rc/bin/service or /dis/svc ?

[Edouard Klein <edou@rdklein.fr>]

Hi,

Thank you for your answer.


sirjofri <sirjofri+ml-9fans@sirjofri.de> writes:

> Hello,
>
> I don't use /rc/bin/service anymore, but I use /cfg/machinename/service instead. My contents are copies of what's in /rc/bin/service or my own scripts:

I assume that you then bind-mount /cfg/machinename/service to that
machine's /rc/bin/service ?

>
> tcp80 - web server
> tcp443 - web server but wrapped in tls
> ...
>
> I have some cifd running, some irc server that translates to grid chat, my mail
> server (smtp and imap4), and fingerd, the files follow the usual scheme tcpXXX.
> I probably missed one service or the other, but aux/listen is simple enough to
> set up custom servers with arbitrary functionality.
>

Would you mind sharing your fingerd and irc server ? For finger my plan
is to turn this one:
https://github.com/michael-lazar/finger2020/blob/master/finger2020 into
a multi-user version, but if there already is one I won't bother.


> If you have exact questions about aux/listen functionality or you don't understand something, just ask :)
>

- I noticed some tcpXXX files use exec for their last line, and some
don't. Is there a reason ? My understanding is that exec saves one call
to fork per connection, and thus it would be best if it was always used.

- I noticed Inferno makes great use of servers that speak 9P on their
  stdstream, with its
  mount {some-program} /mnt/toto
  These programs are trivial to expose thanks to listen:
   listen -v 'tcp!*!toto' {some-program&}
  On Plan9, I ran into rc's cmd <[0=1] | echo 0 > /srv/name, then mount
  /srv/name /n/toto.
  - Is there a inferno-like shorthand for Plan 9 ?
  - Why the "echo 0" ? (I'm not familiar with rc).

> Btw it's quite common to "deactivate" services by renaming the files to have a
> leading "!". In general, everything that follows the naming scheme
> <protocol><port> and is executable will work.
>
why not just chmod -x them ? In a multiuser system, users may not have
the right to rename them.

Thank you for your help :)

Cheers,

Edouard.

> 
> sirjofri

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