Re: udev patch

[Stefanos Harhalakis <v13@it.teithe.gr>]

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On Saturday 09 December 2006 21:42, Bryan Kadzban wrote:
> Stefanos Harhalakis wrote:
> > Currently udev does not reread changed rule files when using
> > symlinks. Debian uses the symlink approach
>
> I have often wondered why Debian uses symlinks for the rules files.  Is
> it just for compatibility with an ancient version of udev, that put the
> rules somewhere else?  Or is it something with package upgrades, to
> handle it better when users decide to remove rules files?  (If that's
> the case, then could the normal dpkg config-file handling -- or anything
> that wouldn't require the files to be kept in two places -- work?)  Or
> is it something else?
>
> Or has this already been discussed to death on Debian lists?  ;-)

  I'm not a debian developer, maintainer or anything more than a debian user, 
so I'll just copy & paste a part from the README.Debian of the udev package:

-----
MAINTAINERS BEWARE: the use of /etc/udev/rules.d/ by other packages is
discouraged, except when only RUN rules are added.
If you think your package needs to create a file there, then please
contact the udev package maintainer and explain your needs.
Packages should NEVER create files in /etc/udev/rules.d/, but create a
symlink the first time the package is installed (and never try again, to
allow the local system administrator to remove it).
-----

  A mail that illustrates this can be found at:
http://lists.alioth.debian.org/pipermail/pkg-alsa-devel/2006-March/003158.html

  There is a debhelper for udev rules called 'dh_installudev' which says:

-----
DESCRIPTION
       dh_installudev is a debhelper program that is responsible for
       installing udev rules files.

       Files named debian/package.udev will be installed as etc/udev/pack‐
       age.rules in the package build directory.

       Then postinst and postrm commands are automatically generated to enable
       the rules file when the package is first installed, by creating a sym‐
       link to it in the /etc/udev/rules.d/ directory. See dh_installdeb(1)
       for an explanation of how this works.
-----

  So I believe that this matches both of your answers, about better 
removal/addition and about the long discussion :-)

  I've CC'd this to Marco d'Itri <md@linux.it>, which is the debian udev 
package maintainer and may answer your questions in more depth.

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