[Pkg-samba-maint] Bug#793866: samba: purging deletes directories (co-)owned by samba-common: /var/{cache, lib, log}/samba

[Andreas Beckmann]

Package: samba
Version: 2:4.1.17+dfsg-4
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts

Hi,

during a test with piuparts I noticed your package removes files that
were installed by another package.
The removed files were already present before the package was installed,
they may have been shipped or created by a dependency.

This could be a violation of policy 10.7.4 ("Sharing configuration
files"), see
https://www.debian.org/doc/debian-policy/ch-files.html#s10.7.4
or policy chapter 6 ("Package maintainer scripts..."), see
https://www.debian.org/doc/debian-policy/ch-maintainerscripts.html
or policy 7.6 ("Overwriting files..."), see
https://www.debian.org/doc/debian-policy/ch-relationships.html#s-replaces

If a directory is used by several packages, all should ship it as part
of the package (possibly empty, using $package.dirs to create it), and
no package should mkdir/rmdir it in the maintainer scripts as dpkg will
take care of this.

>From the attached log (scroll to the bottom...):

3m19.7s ERROR: FAIL: After purging files have disappeared:
  /var/cache/samba/      owned by: samba-common-bin, samba-common
  /var/lib/samba/        owned by: samba, samba-common
  /var/log/samba/        owned by: samba-common


Cheers,

Andreas
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