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From: Kay Sievers <kay.sievers@vrfy.org>
To: linux-hotplug@vger.kernel.org
Subject: Re: 082 cdsymlinks
Date: Thu, 26 Jan 2006 23:24:22 +0000	[thread overview]
Message-ID: <20060126232422.GB24550@vrfy.org> (raw)
In-Reply-To: <d64a48980601261109s1d3013efu3ca6acf024f7df45@mail.gmail.com>

On Thu, Jan 26, 2006 at 01:09:32PM -0600, Aaron Griffin wrote:
> With the removal of %e in udev 082, what do you all do with your cdsymlinks?

%e is not removed now, it's just no longer in the man page and should be
avoided. But sure, some day I'll be happy to remove it, but we need a
simple replacement for the distros/systems that don't do centralized
management.

> You can't really remove them efficiently, because quite alot of apps
> default to /dev/cdrom0 or something similar.
> 
> Using a small script to attach the appropriate number (i.e. cdrom2)
> doesn't work either because udev doesn't honor any sort of device
> order, so an end user may end up placing a cd in 3 different drives to
> get xmms to play some audio, for example.
> 
> I've noticed none of the 'big distros' have solved this problem yet. 

No, on SUSE YaST maintains a rule file, that matches with ID_PATH and
assigns the names for optical devices persistently.

> Does anyone have a solution or any ideas at all?

o Make a simple program, that can be used to edit a dedicated rules file
  and let the user pick a device from the list and assign it a name. The
  program should have simple subsystem specific knowlege, what properties
  can be used for a device. So it could match on SYSFS{address} for network
  interfaces and use ENV{ID_PATH} for a cdrom ...

o Or make it automatically write rules for new devices and assign them a
  new name. That way you get at least everytime the same name, even when
  hardware of the same class is removed from the system which would break
  any simple enumeration.

o Use the persistent naming scheme to reference the devices, but that will
  obviously not be cdrom, cdrom1, cdrom2.

Kay


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  parent reply	other threads:[~2006-01-26 23:24 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-26 19:09 082 cdsymlinks Aaron Griffin
2006-01-26 19:16 ` Andrey Borzenkov
2006-01-26 20:27 ` Aaron Griffin
2006-01-26 23:24 ` Kay Sievers [this message]
2006-01-27 17:08 ` Darren Salt
2006-01-27 20:58 ` Aaron Griffin

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