udev: support explicit key match, non-match and assignment

udev: support explicit key match, non-match and assignment

[Kay Sievers]

I've added more descriptive key assignment and match operators to the
udev rules parser to make the rules better readable.

The KEY="<value>" format supports '=', '=', '!=,' , '+=' now. This makes it
easy to skip certain attribute matches without composing rules with weird
character class negations like:
  KERNEL="[!s][!c][!d]*"

this can now be replaced with:
  KERNEL!="scd*"

The current simple '=' is still supported, and should work as it does today,
but existing rules should be converted if possible, to be better readable.

Thanks,
Kay



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Re: udev: support explicit key match, non-match and assignment operators

[Greg KH]

On Sat, Mar 12, 2005 at 10:01:37PM +0100, Kay Sievers wrote:
> I've added more descriptive key assignment and match operators to the
> udev rules parser to make the rules better readable.
> 
> The KEY="<value>" format supports '=', '=', '!=,' , '+=' now. This makes it
> easy to skip certain attribute matches without composing rules with weird
> character class negations like:
>   KERNEL="[!s][!c][!d]*"
> 
> this can now be replaced with:
>   KERNEL!="scd*"
> 
> The current simple '=' is still supported, and should work as it does today,
> but existing rules should be converted if possible, to be better readable.

Very nice, thanks for doing this work.

greg k-h


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