Your message dated Thu, 12 Jan 2017 23:04:17 +0000
with message-id <e1cropp-0007g2...@fasolo.debian.org>
and subject line Bug#851180: fixed in nss-mdns 0.10-8
has caused the Debian Bug report #851180,
regarding Installing libnss-resolve before libnss-mdns breaks mDNS name
resolution
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
851180: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851180
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: libnss-resolve
Version: 232-6
Severity: serious
Justification: Breaks another package
Hi!
A freshly installed Debian Stretch system will have a
/etc/nsswitch.conf like this (see libc-bin's postinst and/or
/usr/share/libc-bin/nsswitch.conf):
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed,
try:
# `info libc "Name Service Switch"' for information about this file.
passwd: compat
group: compat
shadow: compat
gshadow: files
hosts: files dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
Installing libnss-resolve makes these changes:
--- nsswitch.conf 2016-12-04 15:16:42.701978711 +0100
+++ /etc/nsswitch.conf 2016-12-04 15:16:51.965961200
+0100
@@ -9,7 +9,7 @@
shadow: compat
gshadow: files
-hosts: files dns
+hosts: files resolve [!UNAVAIL=return] dns
networks: files
protocols: db files
If the user then installs for example the "gnome" meta package,
libnss-mdns and libnss-myhostname will be installed as well because of
these dependencies/recommendations:
gnome -> avahi-daemon -> libnss-mdns
gnome -> gnome-core -> gnome-control-center -> libnss-myhostname
This results in the following hosts line:
hosts: files resolve [!UNAVAIL=return] mdns4_minimal
[NOTFOUND=return] dns myhostname
However, because of the "[!UNAVAIL=return]" introduced with [0],
nothing after "resolve" will actually be tried. This is mostly
harmless, since "resolve" provides a superset of "dns" and
"myhostname", but it breaks mDNS as resolved currently does not resolve
mDNS names like "foo.local".
Please note, that
a) This bug depends on the order of package installations. Installing
libnss-resolve *AFTER* everything else will avoid the problem.
b) I think the rationale for the change made in [0] is sound, so
simply reverting the change is not a solution.
IMHO the best solution would be to
a) Activate the mDNS support in resolved [1] if possible.
b) Talk to the GNOME/Avahi maintainers and make them recommend libnss-
resolve instead of the others
c) Eventually remove libnss-mdns and libnss-myhostname from Debian
as both aren't really maintained anymore and have been superseded
by libnss-resolve.
Best regard
Alexander Kurtz
[0]
https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?id=5e0095416366eb86590d6e31242097ded5201b3a
[1] https://github.com/systemd/systemd/blob/master/src/resolve/resolved-mdns.c
signature.asc
Description: This is a digitally signed message part
--- End Message ---
--- Begin Message ---
Source: nss-mdns
Source-Version: 0.10-8
We believe that the bug you reported is fixed in the latest version of
nss-mdns, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 851...@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Simon McVittie <s...@debian.org> (supplier of updated nss-mdns package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmas...@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Format: 1.8
Date: Thu, 12 Jan 2017 22:11:47 +0000
Source: nss-mdns
Binary: libnss-mdns
Architecture: source
Version: 0.10-8
Distribution: unstable
Urgency: medium
Maintainer: Utopia Maintenance Team
<pkg-utopia-maintain...@lists.alioth.debian.org>
Changed-By: Simon McVittie <s...@debian.org>
Description:
libnss-mdns - NSS module for Multicast DNS name resolution
Closes: 500478 782281 782282 851180
Changes:
nss-mdns (0.10-8) unstable; urgency=medium
.
* debian/gbp.conf: use DEP-14 branch names (debian/master and
upstream/latest)
* Standards-Version: 3.9.8 (no changes needed)
* libnss-mdns.postinst: remove special code to handle upgrades from
ancient versions (all were older than squeeze)
* libnss-mdns.postinst: configure libnss-mdns before libnss-resolve
(mitigates: #846944, Closes: #851180)
* libnss-mdns.postinst: shuffle libnss-mdns before libnss-resolve
during upgrade if necessary
* debian/tests: add autopkgtests for the interaction between
libnss-mdns and libnss-resolve
* debian/rules: enable bindnow hardening
* Bump debhelper compat level to 10
- do not explicitly use autoreconf, it is now the default
* debian/rules: FTBFS if files are built but not installed
* libnss-mdns.postrm: do not deconfigure the module until the
package is purged (Closes: #500478, #782281, #782282)
- debian/tests/nss-behaviour: verify that the glibc < 2.11 bug
that caused #534304 has been fixed, so leaving unavailable
NSS modules in /etc/nsswitch.conf is harmless
- debian/tests: add autopkgtests for #500478, #782281, #782282
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