[RFC] persistent-cd does not create /dev/dvd if dvd-drive is second

[RFC] persistent-cd does not create /dev/dvd if dvd-drive is second

[Matthias Schwarzott]

Hi there!

Does anyone already has a solution how to create /dev/dvd with 
persistent-cd-rules, even if first cd-drive does not support dvds.

I have two ideas (but no code):
1. Use new priorities for symlinks, and add rules like this for every 
dvd-capable device:

ENV{ID_CDROM}="?*", ENV{ID_SERIAL}="IDE_DVD-ROM_16X_00000000000000019138", 
SYMLINK+="dvd", OPTIONS="link_priority=PRIO"

with decreasing priority related to $link_num.

2. Everytime adding a dvd-device, let write_cd_rules scan for a rule setting 
the name dvd, and adding it for this one if nothing can be found.

What do you think is better/possible/sane solution.

Matthias

-- 
Matthias Schwarzott (zzam)

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Re: [RFC] persistent-cd does not create /dev/dvd if dvd-drive is

[Marco d'Itri]

On Mar 21, Matthias Schwarzott <zzam@gentoo.org> wrote:

> What do you think is better/possible/sane solution.
AFAIK there is no sane solution, so I choose to ignore the program in
Debian.

-- 
ciao,
Marco

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Re: [RFC] persistent-cd does not create /dev/dvd if dvd-drive is

[Olivier Blin]

Matthias Schwarzott <zzam@gentoo.org> writes:

> Hi there!
>
> Does anyone already has a solution how to create /dev/dvd with 
> persistent-cd-rules, even if first cd-drive does not support dvds.
>
> I have two ideas (but no code):
> 1. Use new priorities for symlinks, and add rules like this for every 
> dvd-capable device:
>
> ENV{ID_CDROM}="?*", ENV{ID_SERIAL}="IDE_DVD-ROM_16X_00000000000000019138", 
> SYMLINK+="dvd", OPTIONS="link_priority=PRIO"
>
> with decreasing priority related to $link_num.
>
> 2. Everytime adding a dvd-device, let write_cd_rules scan for a rule setting 
> the name dvd, and adding it for this one if nothing can be found.

That's basically how we do it in Mandriva. We add a "dvd" alias if
none is found, and always a "dvd<index>" alias.

Please see our cdrom helper scripts here:
http://svn.mandriva.com/cgi-bin/viewvc.cgi/packages/cooker/udev/current/SOURCES/udev_cdrom_helper?view=markup
http://svn.mandriva.com/cgi-bin/viewvc.cgi/packages/cooker/udev/current/SOURCES/udev_persistent_lib.sh?view=markup

Regards

-- 
Olivier Blin - Mandriva

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