udev: rules ignore whitespace but not case

udev: rules ignore whitespace but not case

[Eric C. Cooper]

I use a rule like this
    BUS="scsi", SYSFS{model}="iPod", KERNEL="sd[a-z]2", SYMLINK="ipod"
and it works even though the model field is actually
    "iPod            "

But a rule like this
    BUS="scsi", SYSFS{vendor}="KINGSTON", KERNEL="sd[a-z]1", SYMLINK="flash"
fails with my flash disk because the vendor field is actually "Kingston".

I think that if the pattern matching is going to trim whitespace, it
should also ignore case. That would be more consistent and more
resilient to errors.

-- 
Eric C. Cooper          e c c @ c m u . e d u


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Re: udev: rules ignore whitespace but not case

[Kay Sievers]

On Mon, 2004-11-15 at 15:40 -0500, Eric C. Cooper wrote:
> I use a rule like this
>     BUS="scsi", SYSFS{model}="iPod", KERNEL="sd[a-z]2", SYMLINK="ipod"
> and it works even though the model field is actually
>     "iPod            "
> 
> But a rule like this
>     BUS="scsi", SYSFS{vendor}="KINGSTON", KERNEL="sd[a-z]1", SYMLINK="flash"
> fails with my flash disk because the vendor field is actually "Kingston".
> 
> I think that if the pattern matching is going to trim whitespace, it
> should also ignore case. That would be more consistent and more
> resilient to errors.

That's on purpose. The whitespace is ignored only if your key value does
not end with whitespace. So it's still possible to distinguish fields
with differences only in the whitespace.

Thanks,
Kay



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Re: udev: rules ignore whitespace but not case

[Greg KH]

On Mon, Nov 15, 2004 at 03:40:46PM -0500, Eric C. Cooper wrote:
> I use a rule like this
>     BUS="scsi", SYSFS{model}="iPod", KERNEL="sd[a-z]2", SYMLINK="ipod"
> and it works even though the model field is actually
>     "iPod            "
> 
> But a rule like this
>     BUS="scsi", SYSFS{vendor}="KINGSTON", KERNEL="sd[a-z]1", SYMLINK="flash"
> fails with my flash disk because the vendor field is actually "Kingston".
> 
> I think that if the pattern matching is going to trim whitespace, it
> should also ignore case. That would be more consistent and more
> resilient to errors.

No, we want to only trim whitespace, as that's the most common issue for
people.  Case sensitivity is still important to keep.

thanks,

greg k-h


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