From: Danny Milosavljevic <dannym@scratchpost.org>
To: 25101@debbugs.gnu.org
Subject: bug#25101: simple-scan can't use hpaio
Date: Sat, 3 Dec 2016 19:41:13 +0100 [thread overview]
Message-ID: <20161203194113.6456663e@scratchpost.org> (raw)
simple-scan can't use hpaio as scanner. That means that HP scanners don't work at all.
That's because:
(1) sane-backends installs a hard-coded dll.conf . In itself, that's not so bad. However, this file doesn't contain a line "hpaio".
To workaround this, I set environment variable SANE_CONFIG_DIR to point to a directory which contains a dll.conf which contains (only) a line "hpaio".
(2) sane-backends tries to load /gnu/store/f4kmkdf8s0kpwia9wgiw5a35xljh4a77-sane-backends-1.0.25/lib/sane/libsane-hpaio.so.1 - which won't work.
I checked the source code of sane-backends - and it searches many locations for loadable dynamic libraries, for example the ones specified in environment variables LD_LIBRARY_PATH, SHLIB_PATH LIBPATH (see backend/dll.c load()).
(3) dll.conf has no support for absolute paths. Whatever you put there it will just blindly put after a hard-coded directory prefix.
This is on GuixSD.
How to proceed? Add support for absolute paths and a service which merges multiple dll.conf into one file ?
Or just add hplip as a hard dependency of sane-backends and make it link libsane-hpaio (that's possible in sane)?
Also, should we also amend simple-scan to propagate-input hplip? Otherwise it will come up with a "Install Driver" dialog which won't work either.
next reply other threads:[~2016-12-03 18:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-03 18:41 Danny Milosavljevic [this message]
2016-12-04 4:00 ` bug#25101: simple-scan can't use hpaio Andy Patterson
2016-12-04 4:00 ` bug#25101: [PATCH 1/2] gnu: Add hpaio-enabled sane-backends variant Andy Patterson
2016-12-05 20:48 ` Ludovic Courtès
2016-12-05 22:38 ` Andy Patterson
2016-12-06 9:10 ` Ludovic Courtès
2016-12-12 20:11 ` Andy Patterson
2016-12-12 22:41 ` Ludovic Courtès
2016-12-14 5:03 ` Andy Patterson
2016-12-14 5:03 ` bug#25101: [PATCH 1/3] gnu: sane-backends: Disable backend generation Andy Patterson
2016-12-14 5:03 ` bug#25101: [PATCH 2/3] gnu: Add and use sane-backends-minimal Andy Patterson
2016-12-14 5:03 ` bug#25101: [PATCH 3/3] gnu: Add and use sane-backends Andy Patterson
2016-12-17 22:12 ` bug#25101: [PATCH 1/2] gnu: Add hpaio-enabled sane-backends variant Ludovic Courtès
2016-12-04 4:00 ` bug#25101: [PATCH 2/2] gnu: simple-scan: Enable hpaio support Andy Patterson
2016-12-04 4:18 ` bug#25101: simple-scan can't use hpaio Andy Patterson
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