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maltinator
n00b
Joined: 14 Jan 2004
Posts: 50
Location: Aachen, Germany
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 Posted: Mon Jan 12, 2009 11:19 am Post subject: udev creates device node for printer with wrong gid |
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hi everybody,
I have a problem with my usb printer
| Code: | # ls -l /dev/usb/lp0
crw-rw---- 1 root plugdev 180, 0 12. Jan 2009 /dev/usb/lp0 |
it's owned by root:plugdev, but should be owned by root:lp. with root:plugdev i am not allowed to print, if i change it to root:lp everything works fine
i never knew much about udev so i read some tutorials how it works and i guess i understood it in a good way.
so the following rules from /etc/udev/rules.d should take care of my printer
| Code: | SUBSYSTEM=="usb", KERNEL=="lp*", NAME="usb/%k", SYMLINK+="usb%k", GROUP="lp"
KERNEL=="lp[0-9]*", GROUP="lp", SYMLINK+="par%n" |
looks good. the only udev rules that change usergroup to "plugdev" are in .../rules.d/70-libgphoto2.rules and do -of course- not apply to my printer
so i tried udevadm test
| Code: | # udevadm test /class/usb/lp0
This program is for debugging only, it does not run any program,
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.
parse_file: reading '/dev/.udev/rules.d/10-root-link.rules' as rules file
parse_file: reading '/etc/udev/rules.d/30-kernel-compat.rules' as rules file
parse_file: reading '/etc/udev/rules.d/30-svgalib.rules' as rules file
parse_file: reading '/etc/udev/rules.d/40-alsa.rules' as rules file
parse_file: reading '/etc/udev/rules.d/40-gentoo.rules' as rules file
parse_file: reading '/etc/udev/rules.d/40-video.rules' as rules file
parse_file: reading '/etc/udev/rules.d/50-udev-default.rules' as rules file
parse_file: reading '/etc/udev/rules.d/60-cdrom_id.rules' as rules file
parse_file: reading '/etc/udev/rules.d/60-persistent-input.rules' as rules file
parse_file: reading '/etc/udev/rules.d/60-persistent-storage-tape.rules' as rules file
parse_file: reading '/etc/udev/rules.d/60-persistent-storage.rules' as rules file
parse_file: reading '/etc/udev/rules.d/61-persistent-storage-edd.rules' as rules file
parse_file: reading '/etc/udev/rules.d/64-device-mapper.rules' as rules file
parse_file: reading '/etc/udev/rules.d/65-permissions.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-libgphoto2.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-persistent-cd.rules' as rules file
parse_file: reading '/etc/udev/rules.d/70-persistent-net.rules' as rules file
parse_file: reading '/etc/udev/rules.d/75-cd-aliases-generator.rules' as rules file
parse_file: reading '/etc/udev/rules.d/75-persistent-net-generator.rules' as rules file
parse_file: reading '/etc/udev/rules.d/80-drivers.rules' as rules file
parse_file: reading '/etc/udev/rules.d/90-hal.rules' as rules file
parse_file: reading '/etc/udev/rules.d/90-network.rules' as rules file
parse_file: reading '/etc/udev/rules.d/95-udev-late.rules' as rules file
parse_file: reading '/etc/udev/rules.d/99-fuse.rules' as rules file
parse_file: reading '/etc/udev/rules.d/kino.rules' as rules file
import_uevent_var: import into environment: 'MAJOR=180'
import_uevent_var: import into environment: 'MINOR=0'
import_uevent_var: import into environment: 'PHYSDEVPATH=/devices/pci0000:00/0000:00:10.0/usb2/2-1/2-1:1.0'
import_uevent_var: import into environment: 'PHYSDEVBUS=usb'
import_uevent_var: import into environment: 'PHYSDEVDRIVER=usblp'
udevtest: looking at device '/class/usb/lp0' from subsystem 'usb'
udev_rules_get_name: add symlink 'usblp0'
udev_rules_get_name: rule applied, 'lp0' becomes 'usb/lp0'
udev_rules_get_name: add symlink 'par0'
run_program: 'check-ptp-camera 06/01/01'
run_program: '/lib/udev/check-ptp-camera' returned with status 1
udev_device_event: device '/class/usb/lp0' already in database, cleanup
udev_node_add: creating device node '/dev/usb/lp0', major=180, minor=0, mode=0660, uid=0, gid=1003
udev_node_update_symlinks: update symlink 'usblp0' of '/class/usb/lp0'
udev_db_get_devices_by_name: found index directory '/dev/.udev/names/usblp0'
update_link: found 1 devices with name 'usblp0'
update_link: found '/class/usb/lp0' for 'usblp0'
update_link: compare (our own) priority of '/class/usb/lp0' 0 >= 0
update_link: 'usblp0' with target 'usb/lp0' has the highest priority 0, create it
udev_node_update_symlinks: update symlink 'par0' of '/class/usb/lp0'
udev_db_get_devices_by_name: found index directory '/dev/.udev/names/par0'
update_link: found 1 devices with name 'par0'
update_link: found '/class/usb/lp0' for 'par0'
update_link: compare (our own) priority of '/class/usb/lp0' 0 >= 0
update_link: 'par0' with target 'usb/lp0' has the highest priority 0, create it
udevtest: run: 'socket:/org/freedesktop/hal/udev_event'
udevtest: run: 'socket:@/org/kernel/udev/monitor' |
looks as it should. so why ist /dev/usb/lp0 owned by plugdev?
thanks
malte
Last edited by maltinator on Wed Jan 14, 2009 12:11 pm; edited 1 time in total |
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gentoo_ram
Guru
Joined: 25 Oct 2007
Posts: 513
Location: San Diego, California USA
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| Posted: Tue Jan 13, 2009 1:07 am Post subject: |
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| Hmmm, check /etc/group. See if plugdev and lp happen to have the same GID. |
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maltinator
n00b
Joined: 14 Jan 2004
Posts: 50
Location: Aachen, Germany
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| Posted: Tue Jan 13, 2009 9:52 am Post subject: |
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thanks for your idea but they have not ...
| Code: | lp:x:7:lp [...]
plugdev:x:1003:haldaemon
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so ... could it be a problem with the haldaemon?
malte
Last edited by maltinator on Tue Jan 13, 2009 10:14 am; edited 1 time in total |
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maltinator
n00b
Joined: 14 Jan 2004
Posts: 50
Location: Aachen, Germany
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| Posted: Tue Jan 13, 2009 10:13 am Post subject: |
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okay hald is never startet ... this is # ls /etc/runlevels/boot
| Code: | | bootmisc checkroot consolefont hostname localmount net.lo urandom checkfs clock hibernate-cleanup keymaps modules rmnologin |
and here # ls /etc/runlevels/default
| Code: | | alsasound cupsd lm_sensors netmount sshd vsftpd boinc iptables local ntp-client syslog-ng |
so no hald ... strange ... anyone ideas?
thanks
malte |
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DirtyHairy
l33t
Joined: 03 Jul 2006
Posts: 608
Location: Würzburg, Deutschland
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| Posted: Tue Jan 13, 2009 10:51 am Post subject: |
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| Code: | | udev_node_add: creating device node '/dev/usb/lp0', major=180, minor=0, mode=0660, uid=0, gid=1003 |
This looks like udev (at least in the simulation run) is creating the node as belonging to plugdev, so it looks like an udev problem to me. |
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maltinator
n00b
Joined: 14 Jan 2004
Posts: 50
Location: Aachen, Germany
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| Posted: Wed Jan 14, 2009 12:10 pm Post subject: |
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uhm ... thank you! I thought I checked for that ... but somehow I didn't see that
But why is the node with the wrong gid created?
this rule
| Code: | | SUBSYSTEM=="usb", KERNEL=="lp*", NAME="usb/%k", SYMLINK+="usb%k", GROUP="lp" |
is obviously applied, as otherwise no /dev/usb/lp0 would exist ...
and I do not find any other rules from higher priority files that would apply to my printer
(namely in theese files
parse_file: reading '/dev/.udev/rules.d/10-root-link.rules' as rules file
parse_file: reading '/etc/udev/rules.d/30-kernel-compat.rules' as rules file
parse_file: reading '/etc/udev/rules.d/30-svgalib.rules' as rules file
parse_file: reading '/etc/udev/rules.d/40-alsa.rules' as rules file
parse_file: reading '/etc/udev/rules.d/40-gentoo.rules' as rules file
parse_file: reading '/etc/udev/rules.d/40-video.rules' as rules file)
still in need for some help!
malte |
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