Re: SANE default scanner

From	Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups	linux.debian.user
Subject	Re: SANE default scanner
Date	2020-07-28 00:30 +0200
Message-ID	<AxjN8-3mk-21@gated-at.bofh.it> (permalink)
References	(6 earlier) <AxdeG-7Pd-23@gated-at.bofh.it> <AxdRo-8i6-17@gated-at.bofh.it> <Axekq-8rR-27@gated-at.bofh.it> <AxixH-2FX-7@gated-at.bofh.it> <Axjk6-2WD-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Nicolas George [2020-07-27 23:49:59] wrote:
> Stefan Monnier (12020-07-27):
>> Indeed.  And given SANE's design, there shouldn't be much need for it:
>> it assumes that either the scanner is local (via a hardware-specific
>> driver, hpaio being one of them) or it's remotely accessed over the SANE
>> protocol, in which case it uses the DNS-SD protocol to find it.
>> 
>> The problem is with scanner that are remote but using a "local driver"
>> (local to the client rather than local to the scanner).
>
> This is a sadly classic pattern in Libre software: "not my problem, it's
> the other project doing it wrong".

I'm not sure where you found assignment of blame in what I wrote.

> - The only way to have SANE-using applications see the scanner is that
>   hpaio detects it.

Apparently not 100% so since it works if you provide the URI explicitly.

> Both these points are design mistakes.

I can't see any reason why your request can't be satisfied by a fairly
simple change to the code (e.g. to read extra URIs from a local
configuration file in the client; better would be to be able to read
this info from something like the DNS), with no need for any kind of
redesign.  So it seems like a simple missing feature.
I haven't looked enough at the code to be sure this can be done easily,
but if it can then it shows it's not a design problem.  Just yet another
missing feature.

        Stefan

Thread

SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 12:00 +0200
  Re: SANE default scanner Georgi Naplatanov <gosho@oles.biz> - 2020-07-27 14:00 +0200
    Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 14:50 +0200
      Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 15:00 +0200
        Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 15:00 +0200
          Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 15:30 +0200
        Re: SANE default scanner Hans <hans.ullrich@loop.de> - 2020-07-27 15:10 +0200
          Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 15:30 +0200
      Re: SANE default scanner Georgi Naplatanov <gosho@oles.biz> - 2020-07-27 15:10 +0200
        Re: SANE default scanner Reco <recoverym4n@enotuniq.net> - 2020-07-27 15:30 +0200
        Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 15:40 +0200
          Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 16:00 +0200
            Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 16:30 +0200
              Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 17:40 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 18:10 +0200
              Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 17:40 +0200
          Re: SANE default scanner Georgi Naplatanov <gosho@oles.biz> - 2020-07-27 16:50 +0200
            Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 17:00 +0200
              Re: SANE default scanner Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-27 17:20 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 17:30 +0200
                Re: SANE default scanner Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-27 18:10 +0200
                Re: SANE default scanner Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-27 18:40 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 19:20 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 18:40 +0200
                Re: SANE default scanner Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-27 23:10 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-28 00:00 +0200
                Re: SANE default scanner Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-28 00:30 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-28 14:20 +0200
                Re: SANE default scanner Stefan Monnier <monnier@iro.umontreal.ca> - 2020-07-28 16:20 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-28 21:30 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-29 11:20 +0200
                Re: SANE default scanner <tomas@tuxteam.de> - 2020-07-29 12:10 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-29 20:30 +0200
                Re: SANE default scanner <tomas@tuxteam.de> - 2020-07-29 21:40 +0200
                Re: SANE default scanner <tomas@tuxteam.de> - 2020-07-28 09:40 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 18:40 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 18:50 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 19:10 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 19:20 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 20:00 +0200
                Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 19:40 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-28 14:20 +0200
              Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 20:40 +0200
                Re: SANE default scanner Brian <ad44@cityscape.co.uk> - 2020-07-27 21:20 +0200
                Re: SANE default scanner Gene Heskett <gheskett@shentel.net> - 2020-07-27 21:20 +0200
      Re: SANE default scanner John Boxall <jboxall47@gmail.com> - 2020-07-27 15:30 +0200
        Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 15:40 +0200
          Re: SANE default scanner Liam O'Toole <liam.p.otoole@gmail.com> - 2020-07-29 00:00 +0200
  Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-07-27 19:40 +0200
    Re: SANE default scanner Siard <shiems@mailbox.org> - 2020-07-27 20:00 +0200
  Re: SANE default scanner Siard <shiems@mailbox.org> - 2020-07-27 19:40 +0200
  Re: SANE default scanner George Shuklin <george.shuklin@gmail.com> - 2020-08-07 17:20 +0200
    Re: SANE default scanner Nicolas George <george@nsup.org> - 2020-08-07 17:30 +0200

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