Bug#887439: Clean up files of non-standard media types

[Daniel Leidert]

Package: shared-mime-info
Version: 1.9-2
Severity: important

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Hash: SHA512

Hi,

I'd like to report the behaviour observed in #684017 as bug against
shared-mime-info.

The chemical-mime-data package adds support for various MIME/file types
of the media type chemical/*. This media type has been proposed in 1996
to the IUPAC and neither accepted nor rejected (AFAIK). These MIME types
are in use since then.

IIRC there was not any interest by fd.o to add them to their own database
/usr/share/mime/packages/freedesktop.org.xml, so they have been added by
a separate project. Now I perfectly understand, that update-mime-database
warns about unregistered media types. But I don't understand, why it doesn't
care to purge the files it created from such media type definitions and
leaves e.g. /usr/share/mime/chemical/x-*.xml when removing chemical-mime-data.

These are the main reasons, why I consider this to be a bug in shared-mime-info:

- - The files created in /usr/share/mime/ are solely created by
  update-mime-database and not by the package installing a database into
  /usr/share/mime/packages/. Therefor update-mime-database is responsible
  for removing them.

- - The project itself defines, installs and removes media types, that have
  never been registered with the IANA and are not official MIME media types. 
  These media types are font, inode, x-content, x-epoc and x-scheme-handler.  
  update-mime-database.c defines them in const char *media_types[] and
  /usr/share/mime/packages/freedesktop.org.xml contains various subtypes
  of them.

Regards, Daniel








- -- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'unstable-debug'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages shared-mime-info depends on:
ii  libc6         2.26-4
ii  libglib2.0-0  2.54.3-1
ii  libxml2       2.9.4+dfsg1-6.1

shared-mime-info recommends no packages.

shared-mime-info suggests no packages.

- -- no debconf information

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