hpaio.c contains localOnly condition, that breaks saned

[Dambaev Alexander]

Looks like DevDiscovery(int localOnly) thinks that saned does need to know about network devices, defined by cups.

This breaks saned, used by remote sane client

[Dambaev Alexander (theice)]

this condition was introduced by Tim Waugh (https://bugzilla.redhat.com/show_bug.cgi?id=743593#c18) in 2011-10-20
By that patch, he was tried to fix slow lpstat execution, which triggers cupsd, colord, sane and then hpaio.

[brian_p (claremont102)]

We have a bug report in Debian on the same issue:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=807427

It appears that a user would find it impossible to make any HP scanner on a SANE server visible to a client running SANE. This seems to be a very unfortunate decision to implement.

The localOnly condition was removed in 2007 with the remark:

> This looks like a case where we don't necessarily follow
> the Sane specification. Since the old hpaio code ignored localOnly
> and seemed to work ok, I see no reason for not changing it back.

What is strange is that is was reintroduced in 2013. There is absolutely no record giving details as to why; that it happened and for what reason is not even recorded. This is two years after the Redhat bug mentioned above, which, as far as I can make out, introduced a patch to Redhat only.

So, what is the benefit of not making scanning devices visible on the network through SANE?

Regards,

Brian.

[brian_p (claremont102)]

Another Debian report:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=838212

Regards,

Brian.

[Harald Heigl (harald-heigl)]

Hi,

Are there any news to this issue? I would like to have solved this too.
Perhaps a better solution would be to make this configurable as said in the linked report with a environment variable of LIBSANE_HPAIO_LOCALONLY.
If it is not set at all the current behaviour would work otherwise the setting in the environemnt variable.

Regards,
Harald

[PEREZ Christophe (n-chris-m)]

Hi,

Same problem for me, on gentoo.
I have to apply a custom patch, but it would be great to have a option to select for this.
https://bugs.gentoo.org/798714