udev autoruler for persistent device naming?

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

I need to ask for your comment on an idea:

With udev, anybody capable reading documentation and execute commands in
a shell, should be able to uniquely name the connected devices.
But if you don't have a rule for every device, you stick with the old
problem, that the device name depends on the order of discover. To use
persistent names for udev, we may plug a small program as a udev callout
in udev.rules for devices not catched by any other rule:

  KERNEL="sd*[1-4]", PROGRAM="/sbin/udev_autoruler", NAME="%c", USER="$local"

this 'udev_autoruler' thing examines the device, guesses what it looks
like (like kudzu) and creates a rule with unique device attributes, like the
serial number and the unique NAME for the node.
The CALLOUT will place this rule in a file in /etc/udev/rules.d/ The same
name is returned to udev to actually name the node. If the device is reconnected
anytime later, this new rule will match it and assignes the same name forever.


Hmm, I don't know, if I really like the idea myself :)
But, what do you think?

thanks,
Kay


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