can't use parallel port scanner as ordinary user

[robatino]

My father has a Umax Astra 2000P parallel port scanner. In order to allow scanning as an ordinary user, we would like to make /dev/parport0 world-readable and writable. Prior to udev one could just change the permissions from 660 to 666. This won't work with udev recreating the device after each boot. I tried editing /etc/udev/rules.d and changing the permissions in the line

KERNEL=="parport*", GROUP="lp", MODE="0660"

to 666 instead. But it doesn't work - after rebooting, the permissions are still 660. Any ideas?

[robatino]

After reading man pages, we've done the following:

1) In /etc/sane.d/dll.conf, uncommented "umax_pp".
2) In /etc/sane.d/net.conf, uncommented "localhost".
3) In /etc/xinetd.d, created a file sane-port with the contents:

# default: off
# description: The sane server accepts requests
# for network access to a local scanner via the
# network.
service sane-port
{
port = 6566
socket_type = stream
wait = no
user = root
group = root
server = /usr/sbin/saned
}

Still no luck. It shouldn't be necessary to put "localhost" in /etc/sane.d/saned.conf since the saned man page says that in this file, connections from localhost are always permitted. It would be nice if someone would have detailed instructions posted on how to get parallel-port scanners working in Fedora, since the details are distro-specific.

[nimbius]

SUID bit sounds like something worth a try

http://wiki.linuxquestions.org/wiki/Suid

[robatino]

Finally solved - see

http://forums.fedoraforum.org/forum/...d.php?p=571177