udev and group permission

[PGPGPG]

My scanner works perfectly for my wife and me if EITHER she OR me are logged on.

But if we both are logged on (same box with different sessions) only the one of us who has logged in first owns the device and the other one isn't allowed to use it.

I thougt a solution might be to add a 00-local.rules in the /etc/udev/rules.d directory with the line
__________________________________________________ _____
BUS="usb", SYSFS{idProduct}="220e", SYSFS{idVendor}="04a9", NAME="usb/%k", MODE="660", GROUP="users"
__________________________________________________ _____
in it but without success (we are both member of the users group of course).

Using "strace scanimage -L" I found the difference. For the one logged on first the relevant portion is
__________________________________________________ _____
open("/proc/bus/usb/001/006", O_RDWR) = -1 EACCES (Permission denied)
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, path="/var/run/.resmgr_socket"}, 25) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, = 0
sendmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"open usb:001,006\n", 18}], msg_controllen=0, msg_flags=0}, 0) = 18
rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, = 0
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"1", 1}], msg_controllen=24, {cmsg_len=20, cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, {4}}, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"0", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"0", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{" ", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"s", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"u", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"c", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"c", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"e", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"s", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"s", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"\n", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
close(3) = 0
__________________________________________________ _____

which reads as '100 success' and the output is

__________________________________________________ _____
peter@baer:~> scanimage -L
device `plustek:libusb:001:006' is a Canon N1240U/LiDE30 USB flatbed scanner
device `plustek:libusb:001:006' is a Canon N1240U/LiDE30 USB flatbed scanner
__________________________________________________ _____

For the one logged on thereafter the same lines are
__________________________________________________ _____
open("/proc/bus/usb/001/006", O_RDWR) = -1 EACCES (Permission denied)
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, path="/var/run/.resmgr_socket"}, 25) = 0
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, = 0
sendmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"open usb:001,006\n", 18}], msg_controllen=0, msg_flags=0}, 0) = 18
rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, = 0
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"5", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"0", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"2", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{" ", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"p", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"e", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"r", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"m", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"i", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"s", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"s", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"i", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"o", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"n", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{" ", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"d", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"e", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"n", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"i", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"e", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"d", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"\n", 1}], msg_controllen=0, msg_flags=0}, 0) = 1
close(3) = 0
__________________________________________________ _____

which means '502 permission denied' and the output is

__________________________________________________ _____
steffi@baer:~> scanimage -L

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
__________________________________________________ _____

What do I have to check/change?

PS:

Disto: SUSE 9.3 64bit

baer:~ # kernelversion
2.6

[eugrus]

With udev you can change device permissions in /etc/udev/permissions.d/*udev.permissions config-file.

[PGPGPG]

Maybe its distro dependent or u have an older udev version. Here the directory permissions.d lies directly under /etc and contains no such file:

peter@baer:/etc/permissions.d> ls
apache2 cups-client postfix susehelp tetex tetex.paranoid

Other relevant directories are:
peter@baer:/etc/udev> ls
rules.d scripts udev.conf

peter@baer:/etc/udev/rules.d> ls
00-local.rules 20-cdrom.rules 45-volume_label.rules
00-local.rules~ 41-usb.rules 50-udev.rules

Thx for your help

[eugrus]

locate udev.permissions

[PGPGPG]

must be distro/release differences. Since I don't use locate I did a

baer:/home/peter # find / -name udev.permissions 2>/dev/null
/usr/share/doc/packages/udev/examples/udev.permissions

So the only udev.permissions is an example file.

Thx again for your help

[eugrus]

What distro do you use?

[PGPGPG]

Suse 9.3 as I stated in my profile and in my original posting