udev problems

["Michal Čihař" <michal@cihar.com>]

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Hi

I finally decided to give udev a try, but it was not as good as I hoped. I 
have Apacer Mega Steno card reader (as well as other usb storage device) and 
I wanted to have permanent name for it. Okay, lets create some rule in 
udev.rules and script that will generate it. Sometimes the name was generated 
correctly and sometimes not. Afer some experiments I got three rules, that 
seem to work (with line numbers):

21: BUS="scsi", SYSFS{vendor}="Apacer  ", SYSFS{model}="Mega Steno      ", 
PROGRAM="/etc/udev/apacer.sh %k %b %n", NAME="%c{1}", SYMLINK="%k %c{2} 
%c{3}"
22: BUS="scsi", SYSFS{vendor}="Apacer  ", PROGRAM="/etc/udev/apacer.sh %k %b 
%n", NAME="%c{1}", SYMLINK="%k %c{2} %c{3}"
23: BUS="scsi", SYSFS{vendor}="Apacer", PROGRAM="/etc/udev/apacer.sh %k %b 
%n", NAME="%c{1}", SYMLINK="%k %c{2} %c{3}"

related udev log:

configured rule in '/etc/udev/udev.rules' at line 21 applied, added symlink 
'%k %c{2} %c{3}'
configured rule in '/etc/udev/udev.rules' at line 21 applied, 'sda' becomes 
'%c{1}'
creating device node '/dev/scsi/host28/bus0/target0/lun0/disc'
configured rule in '/etc/udev/udev.rules' at line 21 applied, added symlink 
'%k %c{2} %c{3}'
configured rule in '/etc/udev/udev.rules' at line 21 applied, 'sdc' becomes 
'%c{1}'
creating device node '/dev/scsi/host28/bus0/target0/lun2/disc'
configured rule in '/etc/udev/udev.rules' at line 22 applied, added symlink 
'%k %c{2} %c{3}'
configured rule in '/etc/udev/udev.rules' at line 22 applied, 'sdb' becomes 
'%c{1}'
creating device node '/dev/scsi/host28/bus0/target0/lun1/disc'
configured rule in '/etc/udev/udev.rules' at line 23 applied, added symlink 
'%k %c{2} %c{3}'
configured rule in '/etc/udev/udev.rules' at line 23 applied, 'sda1' becomes 
'%c{1}'
creating device node '/dev/scsi/host28/bus0/target0/lun0/part1'

Why does every time match another rule?

Using udev 021 (from Debian unstable) and kernel 2.6.3.

Another topic is that device does not automatically report partitions, so man 
has to read appropriate device to get partitions.

- -- 
Regards
	Michal ÄŒihaÅ™
	http://cihar.com
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