[Bug 1600000] Re: libnss-resolve treats two trailing dots on a domain name incorrectly

[Martin Pitt]

Forwarded to https://github.com/systemd/systemd/issues/3978

** Bug watch added: github.com/systemd/systemd/issues #3978
   https://github.com/systemd/systemd/issues/3978

** Changed in: systemd (Ubuntu)
       Status: New => Triaged

** Tags added: resolve

** Tags added: yakkety

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Title:
  libnss-resolve treats two trailing dots on a domain name incorrectly

Status in systemd package in Ubuntu:
  Triaged

Bug description:
  (base)adconrad at nosferatu:~$ getent ahostsv4 www.gnu.org..
  208.118.235.148 STREAM wildebeest.gnu.org
  208.118.235.148 DGRAM  
  208.118.235.148 RAW    
  (base)adconrad at nosferatu:~$ sudo sed -i -e 's/ resolve dns/ dns/' /etc/nsswitch.conf 
  (base)adconrad at nosferatu:~$ getent ahostsv4 www.gnu.org..
  (base)adconrad at nosferatu:~$ sudo sed -i -e 's/ dns/ resolve dns/' /etc/nsswitch.conf 
  (base)adconrad at nosferatu:~$ getent ahostsv4 www.gnu.org..
  208.118.235.148 STREAM wildebeest.gnu.org
  208.118.235.148 DGRAM  
  208.118.235.148 RAW    
  (base)adconrad at nosferatu:~$ 

  This is responsible for the new regression in glibc:

  ----------
  FAIL: posix/tst-getaddrinfo5
  original exit status 1
  resolving "localhost." worked, proceeding to test
  resolving "localhost.." failed, test passed
  resolving "www.gnu.org." worked, proceeding to test
  resolving "www.gnu.org.." worked, test failed
  ----------

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