Please modify SANE backends instructions as described below.
0) Install libsane as usual.
1) After installation, create the "scanner" group.
groupadd scanner
2) Generate udev rules for all scanners.
sh tools/udev/convert-usermap.sh tools/hotplug/libsane.usermap
Note: the generated "libsane.rules" file is a bit suboptimal (slow) because the
"don't walk the entire list of rules for uevents that we don't want to handle"
logic is not implemented correctly.
To fix this (optionally), replace the following line in the generated
"libsane.rules" file
SUBSYSTEM!="usb_device", ACTION!="add", GOTO="libsane_rules_end"
with the following two lines:
ACTION!="add", GOTO="libsane_rules_end"
SUBSYSTEM!="usb_device", GOTO="libsane_rules_end"
(alternatively, you may want to edit the convert-usermap.sh script instead of
the generated file)
3) Install them.
install -m644 libsane.rules /etc/udev/rules.d/31-libsane.rules
Result: all raw USB nodes for all known scanners are owned by the "scanner"
group.
--
Alexander E. Patrakov
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