[CentOS] help with udev rules needed

Farkas Levente lfarkas at lfarkas.org
Thu Jan 22 12:44:20 UTC 2009


rray_1 at comcast.net wrote:
> On Wed, 21 Jan 2009, Farkas Levente wrote:
> 
>> rray_1 at comcast.net wrote:
>>> On Wed, 21 Jan 2009, Farkas Levente wrote:
>>>
>>>> rray_1 at comcast.net wrote:
>>>>> I am migrating from Fedora 8 to CentOS 5.2
>>>>> I have usb dvd
>>>>>
>>>>> On F8 I have /etc/udev/rules/00-my-custom.rules
>>>>> BUS=="scsi", SYSFS{vendor}=="TSSTcorp", SYSFS{model}=="CDDVDW SH-S203N
>>>>> ",SYMLINK="dvd",OWNER="rray"
>>>>> When I plug in dvd I get
>>>>> $ ll /dev/scd1
>>>>> lrwxrwxrwx 1 root root 3 Aug 25 08:17 /dev/scd1 -> sr1
>>>>>   ll /dev/sr1
>>>>> brw-r----- 1 rray disk 11, 1 2009-01-21 12:29 /dev/sr1
>>>>> Everything is ok
>>>>>
>>>>> On C5.2 I have /etc/udev/rules/00-my-custom.rules
>>>>> BUS=="scsi", SYSFS{vendor}=="TSSTcorp", SYSFS{model}=="CDDVDW SH-S203N
>>>>> ",SYMLINK="dvd",OWNER="rray"
>>>>> When I plug in dvd I get
>>>>> # ll /dev/scd0
>>>>> brw-rw---- 1 root disk 11, 0 Jan 21 12:30 /dev/scd0
>>>>> I have also tried MODE="0666" and it also has no affect
>>>>>
>>>>> I have checked "udevinfo -a -p $(udevinfo -q path -n /dev/scd0/1)" on both
>>>>> machines and they are the same
>>>> what's the problem?
>>>> the above rule has nothing to do with sdcX it's just create dvd symlink,
>>>> the device itself created by system udev rules.
>>>>
>>>>
>>> On C5.2 the device has root:disk ownership and 660 perms
>>> The OWNER="rray" part of the udev rule appears to be ignored
>>> How can I change the owner to "rray" or perms to "0666"
>> _which_ device? scd1 or dvd!!!?
>> your rule is about dvd it has nothing to with scd1!
>>
>>
> 
> I believe I am very confused
> Please ignore everything above
> If I wanted to write a udev rules such that when I plugged in my usb dvd 
> drive, the owner of the device file is "rray" what might that rule look 
> like given udevinfo tells me these characteristics describe my dvd drive
> BUS=="scsi", SYSFS{vendor}=="TSSTcorp", SYSFS{model}=="CDDVDW SH-S203N"

ACTION="add, NAME="dvd", OPTION="last_rule"
or something like that

-- 
  Levente                               "Si vis pacem para bellum!"


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