Bug#1000819: udev: please revert removal of cd/dvd compat rules

[Michael Biebl]

Am 29.11.2021 um 23:03 schrieb Matt Zagrabelny:
> On Mon, Nov 29, 2021 at 3:51 PM Michael Biebl <biebl at debian.org> wrote:
>>
>> Am 29.11.2021 um 18:22 schrieb Matt Zagrabelny:
>>> Package: udev
>>> Version: 249.7-1
>>> Severity: normal
>>>
>>> Greetings,
>>>
>>> Thank you for your work in Debian.
>>>
>>> I noticed that when I plug in my USB DVD drive I no longer get the /dev/dvd
>>> link. It breaks things like "lsdvd" and "mplayer dvd://1".
>>>
>>> In order to solve #991639 by removing the compat file
>>> (rules/80-debian-compat.rules) it ends up breaking simple use-cases, such as
>>> those of us with a single optical drive and wanting to use applications that
>>> expect to use /dev/dvd.
>>>
>>> Would you consider reverting a66d122048b?
>>> https://salsa.debian.org/systemd-team/systemd/-/commit/a66d122048b8d0d6c057c0504880f1b37e222cab
>>>
>>
>> This is not planned. Keep in mind, that this udev rule has always been
>> Debian specific, so if software is actually buggy in that regard, it
>> should be fixed in any case.
>> The best we can do is to file bug reports against affected packages.
>> Since we are early in the bookworm release cycle, we have plenty of time
>> for that. Would you mind filing bug reports if you encounter such issues?
> 
> 
> I can file bug reports.
> 
> What should the report look like?
> 
> "Debian's default udev/systemd installation no longer provides

This is not systemd specific, only udev.

> symlinks for /dev/dvd and your software no longer works without
> intervention.

This sounds quite drastic. I would assume the affected packages still 
work (mostly) fine and only certain functionality would be affected.

  Please implement foobar so your software will work with
> the way things are being done now."
> 
> I don't know what "foobar" is in the above. I only know what I read in
> your commit message:
> 
> """
> [...] older software which wasn't able to automatically
> discover those types of devices
> """
> 
> Applications like lsdvd and mplayer should be able to "discover" the
> DVD drives? Hmmm... I'm guessing those applications, which are indeed
> "old", yet venerable, might balk at the extra application code when
> creating the symlink at the OS level seems so easy.
> 
> Either way... if you let me know what those applications "should" be
> doing, I'll submit bug reports.

Use libudev to enumerate and watch for devices.

Some DEs also provide higher level abstractions like udisks or GIO, 
which one could use.

Michael

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