Re: Bug#294123: udev: Bad parsing of regular expressions in *.rules

[Kay Sievers <kay.sievers@vrfy.org>]

On Mon, 2005-02-14 at 09:30 -0800, Greg KH wrote:
>On Sun, Feb 13, 2005 at 04:14:41AM +0100, Kay Sievers wrote:
>> On Tue, 2005-02-08 at 21:53 -0800, Greg KH wrote:
>> >On Wed, Feb 09, 2005 at 03:24:31AM +0100, Kay Sievers wrote:
>> >> Can't you match against some interface attributes in sysfs, which are
>> >> telling you which one is the first interface of this device?
>> >> 
>> >> You may compare: 
>> >>   udevinfo -a -p /class/tty/ttyUSB0
>> >>   udevinfo -a -p /class/tty/ttyUSB1
>> >> 
>> >> if you find a difference between both interfaces to match against, that
>> >> is not dependent on the kernel device name.
>> >
>> >This is a real tough one to try to match on, as these both point to the
>> >same exact physical device.  Same USB interface even.  It's a pain,
>> >stupid palm devices...
>> 
>> Ahh, I see. So we may follow the link to the physical device and look
>> for the name of the _first_ serial interface of this device? Would this
>> solve the problem?
>
>Heh, not quite, as you usually want the _second_ serial interface to
>sync off of, the first one is not useful at all (well, some tools use
>it, but 99% of the users never will care about it.)
>
>And then there's the fun problem of some Sony devices creating two
>serial "devices" where the second one is just a "fake" one, and you
>really need to connect to the first.
>
>Bah, sometimes I really hate Palm...

Yeah, I can imagine that. But would it be possible to get the right one
with the information available in sysfs? Someone could write a small
script which matches the vendor and return a symlink for the _right_
interface. Would that work?

Btw: The "Bad parsing ..." wasn't a udev issue. It's solved.

Thanks,
Kay



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