I've been wrestling with udev for a while, and have several questions.
* The following rule is in a file, /etc/udev/rules.d/20-scanner.rules:
BUS=="scsi", SYSFS{vendor}=="HP", SYSFS{model}=="C2570A", NAME="%k", SYMLINK="scanjet", MODE="0666"
The symlink is created, but the ownership and permissions are
incorrect:
lrwxrwxrwx 1 root root 3 Jan 7 03:49 /dev/scanjet -> sg1
crw------- 1 ccurley root 21, 1 Jan 7 03:49 /dev/sg1
Is there something wrong with the rule, or is something else munging
the permissions after the rule operates? Perhaps after udev runs?
Running "udevtest /sys/class/scsi_generic/sg1 scsi" suggests that the
rule is being accepted.
udevtest.c: looking at device '/class/scsi_generic/sg1' from subsystem 'scsi'
udevtest.c: opened class_dev->name='sg1'
udev_rules.c: configured rule in '/etc/udev/rules.d/20-scanner.rules[8]' applied, added symlink 'scanjet'
udev_rules.c: add symlink 'scanjet'
udev_rules.c: configured rule in '/etc/udev/rules.d/20-scanner.rules[8]' applied, 'sg1' becomes '%k'
udev_add.c: creating device node '/dev/sg1', major = '21', minor = '1', mode = '0666', uid = '0', gid = '0'
* Am I using udevtest correctly? Does the "subsystem" argument mean a
device type, such as "scsi" or "usb"?
* The following rule, in file "/etc/udev/rules.d/30-usb-disk-rules"
does not appear to run.
BUS=="scsi", SYSFS{vendor}=="WD", SYSFS{model}=="3200JB External", NAME="%k", SYMLINK="WD%n"
[root@charlesc class]# udevtest /sys/block/sda scsi
udevtest.c: looking at device '/block/sda' from subsystem 'scsi'
udevtest.c: opened class_dev->name='sda'
udev_rules.c: no rule found, use kernel name 'sda'
udev_add.c: creating device node '/dev/sda', major = '8', minor = '0', mode = '0660', uid = '0', gid = '0'
Unfortunately, udevtest does not indicate why the rule failed.
udevinfo provides the following selected data:
....
SYSFS{model}=="3200JB External"
....
SYSFS{vendor}=="WD "
--
Charles Curley /"\ ASCII Ribbon Campaign
Looking for fine software \ / Respect for open standards
and/or writing? X No HTML/RTF in email
http://www.charlescurley.com / \ No M$ Word docs in email
Key fingerprint = CE5C 6645 A45A 64E4 94C0 809C FFF6 4C48 4ECD DFDB
Attachment:
pgptsYb35t3ML.pgp
Description: PGP signature
