Hello, > On Sun, Jun 10, 2012 at 9:42 AM, Per Dalgas Jakobsen <pdj at knaldgas.dk> > wrote: >> scanimage -L fails as user (succeeds as root).
On Jun 11 20:34 m. allan noah wrote (excerpt): > You will have to adjust the device permissions, using something like > udev, or hal. Unfortunately, the mechanism seems to change frequently > with linux distros... It is not the Linux distros but in the upstream kernel-related area where such changes happen frequently. The traditional persistent device node files (where chown/chmod worked persistently as it works "since ever" for all files in Unix systems) were replaced by dynamically created device nodes (where chown/chmod does no longer work persistently). The dynamic device nodes are managed by various changing stuff like hotplug/devfs that was replaced by HAL plus udev/sysfs but HAL is dropped since some time and recently udev was merged into systemd... Currently it should be udev that is used by a current Linux distro to manage device nodes. But do not expect that there is THE udev with a common stable set of udev rules for all Linux distros because udev depends in some way on the kernel version. You may have a look at http://en.opensuse.org/SDB:Configuring_Scanners the section "USB scanner access permissions via udev" which reads in particular: ---------------------------------------------------------------------- The best workaround to get those kind of issues out of sight is to use the "saned" which is a service for scanning via network. On the server the saned is set up and launched via xinetd. On the client the "net" meta-backend is used for scanning via network. See "man saned" and "man sane-net". By using the loopback network this can be used on the local host too. In this case server and client are the same machine "localhost". To access a scanner via the "saned" on the local host you may set up the following: 1. Let the saned run as root (default in /etc/xinetd.d/sane-port) 2. Allow access from "localhost" in /etc/sane.d/saned.conf 3. Specify the server "localhost" in /etc/sane.d/net.conf 4. Activate the "net" meta-backend in /etc/sane.d/dll.conf ---------------------------------------------------------------------- Kind Regards Johannes Meixner -- SUSE LINUX Products GmbH -- Maxfeldstrasse 5 -- 90409 Nuernberg -- Germany HRB 16746 (AG Nuernberg) GF: Jeff Hawn, Jennifer Guild, Felix Imendoerffer
