Comment # 30 on bug 938659 from Markus Elfring

(In reply to Johannes Meixner from comment #28)
> please also attach an appropriate part of a journalctl output

I would prefer an other approach to drill down into involved details.


I have added the following specification to the discussed addition actions in
the configuration files "/usr/lib/udev/rules.d/50-udev-default.rules" and
"/usr/lib/udev/rules.d/70-printers.rules".

, RUN{program}+="/bin/bash -c 'my_log=/tmp/log938659.txt && /usr/bin/date -Ins
>> $my_log && echo configure-%p >> $my_log && /usr/bin/ls -l
/dev/bus/usb/$env{BUSNUM}/$env{DEVNUM} >> $my_log'"


The specified log file contains information like the following after I
restarted "systemd-udevd.service" and switched my printer on again.

2015-07-23T16:37:59,712732516+0200
lp-/devices/pci0000:00/0000:00:02.1/usb1/1-2
crw-rw---- 1 root users 189, 4 Jul 23 16:37 /dev/bus/usb/001/005
2015-07-23T16:37:59,729717592+0200
configure-/devices/pci0000:00/0000:00:02.1/usb1/1-2
crw-rw---- 1 root users 189, 4 Jul 23 16:37 /dev/bus/usb/001/005



(In reply to Dr. Werner Fink from comment #29)
> ENV{ID_USB_INTERFACES}=="*:0701??:*", MODE:="0664", GROUP:="lp"
> 
> that means with colon a later override will be avoided

The specified log file contains information like the following after another
restart of udevd and my printer.

2015-07-23T16:45:52,895724921+0200
lp-/devices/pci0000:00/0000:00:02.1/usb1/1-2
crw-rw-r-- 1 root lp 189, 5 Jul 23 16:45 /dev/bus/usb/001/006
2015-07-23T16:45:52,907780826+0200
configure-/devices/pci0000:00/0000:00:02.1/usb1/1-2
crw-rw-r-- 1 root lp 189, 5 Jul 23 16:45 /dev/bus/usb/001/006


Does such a debug display mean that the setting of device file permissions by
the udev assignment key "GROUP" alone is fragile on my Tumbleweed system in the
shown constellation so far?