Re: feature request (if possible): symlink name in environment

[martin f krafft <madduck@madduck.net>]

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also sprach Kay Sievers <kay.sievers@vrfy.org> [2004.12.21.1611 +0100]:
> Use udevinfo in the dev.d/ script and ask with the DEVPATH for the
> symlinks:
> 
>   [kay@pim ~]$ udevinfo -r -q symlink -p /class/video4linux/video0
>   /dev/camera0 /dev/kamera0 /dev/videocam0 /dev/webcam0 

Awesome. I hacked together the attached file. However, it does not
seem to be working. The logs indicate that everything goes by plan,
but the permissions are not changed.

Am I thus to assume that the hooks run before the rules.d
permissions are applied?

-- 
martin;              (greetings from the heart of the sun.)
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#!/bin/bash -e

[[ $ACTION = add ]] || exit 0

UDEV_CONF=/etc/udev/udev.conf
[[ -f $UDEV_CONF ]] && . $UDEV_CONF
[[ -z $udev_permissions ]] && udev_permissions=/etc/udev/permissions.d

REFS="$DEVNAME $(udevinfo -r -q symlink -p $DEVPATH)"
logger -t $0 -p daemon.debug -- "checking references for $DEVNAME for permission
s: $REFS"
for node in $REFS; do
  [[ ! -b $node ]] && [[ ! -c $node ]] && [[ ! -L $node ]] && continue
  name=${node#/dev/}
  perms=$(grep -h "^$name" $udev_permissions/*.permissions | tail -1)
  set -- $(echo ${perms//:/ })
  [[ -z $2 ]] && continue
  logger -t $0 -p daemon.debug -- "applying permissions $2:$3:$4 to $DEVNAME (due to reference '$1')..."
  chgrp $2:$3 $DEVNAME
  chmod $4 $DEVNAME
done

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