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Bug#562594: Use modalias to detect modules when driver does not register

On Mon, 28 Dec 2009 15:17:49 +0100
Frans Pop <elendil@planet.nl> wrote:
> I think the patch needs an added test that modalias exists, something
> like: elif [ -e $devpath/modalias ]; then
> And that long line could do with a split to the next line after the
> pipe. The "|| true" is probably not needed as the sed statement will
> absorb any errors from modprobe, but maybe there should be a redirect
> of errors: module=$(modprobe --show-depends "$modalias" 2>/dev/null |
> \ sed -n -e '$s#^.*/\([^.]*\)\.ko.*$#\1#p')

Feel free to modify as you wish; that was done during a lunch break
at $PAID_WORK. :)

> A comment that the module supporting the device is the last line
> returned by modprobe would be useful. It's not quite self-evident.

True. This is related to the way "--show-depends" works in modprobe :
it simply ignores every modules already loaded and display like in
verbose mode every commands that would be run.  Resolving the
dependency chain, the last module will always be the one asked on the

Jérémy Bobbio - Administrateur système et réseau
Mezcalito - http://www.mezcalito.fr
17 boulevard Agutte Sembat - 38000 Grenoble
04 76 01 03 91

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