[Bug 1089766] Re: correct resolvconf update order for resolv.conf file fix

[Thomas Hood]

Except for the order in which "nameserver" option instances occur, the
order in options appearing in resolv.conf does not matter.

** Changed in: resolvconf (Ubuntu)
       Status: New => Invalid

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Title:
  correct resolvconf update order for resolv.conf file fix

Status in “resolvconf” package in Ubuntu:
  Invalid

Bug description:
  Out of box resolvconf improperly updates resolv.conf file. You will
  see the following information in the /etc/resolv.conf:

  # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
  #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
  nameserver 127.0.0.1
  search domain.actdsltmp
  options edns0

  As you can see, the 'search' line follows name server line. However,
  'domain' and 'search' lines should appear before 'nameserver' line.
  The update error happens due to order of entries in
  /etc/resolvconf/update.d/libc. The included upstream data file 'libc'
  in the package from ubuntu/debian packages/ports says:

  ### Make the file ###
  : > "$TMPFILE"
  [ -f "$HEADFILE" ] && cat "$HEADFILE" >> "$TMPFILE"
  for N in $NMSRVRS ; do echo "nameserver $N" >> "$TMPFILE" ; done
  [ "$SRCHS" ] && echo "search $SRCHS" >> "$TMPFILE"
  [ "$RSLVCNFFILES" ] && sed -e '/^[[:space:]]*$/d' -e '/^[[:space:]]*#/d' -e '/^[[:space:]]*\(\(nameserver\)\|\(search\)\|\(domain\)\)[[:space:]]/d' $RSLVCNFFILES >> "$TMPFILE" 2>/dev/null
  [ -f "$TAILFILE" ] && cat "$TAILFILE" >> "$TMPFILE"

  To see the proper order:

  # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
  #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
  search domain.actdsltmp
  nameserver 127.0.0.1
  options edns0

  It should say something like this:
  ### Make the file ###

  # so i did this to get the resolv conf file in etc to show search before nameserver entry
  : > "$TMPFILE"
  [ -f "$HEADFILE" ] && cat "$HEADFILE" >> "$TMPFILE"
  [ "$SRCHS" ] && echo "search $SRCHS" >> "$TMPFILE"
  for N in $NMSRVRS ; do echo "nameserver $N" >> "$TMPFILE" ; done
  [ "$RSLVCNFFILES" ] && sed -e '/^[[:space:]]*$/d' -e '/^[[:space:]]*#/d' -e '/^[[:space:]]*\(\(domain\)\|\(search\)\|\(nameserver\)\)[[:space:]]/d' $RSLVCNFFILES >> "$TMPFILE" 2>/dev/null
  [ -f "$TAILFILE" ] && cat "$TAILFILE" >> "$TMPFILE"

  The diff for two looks like this:
  diff Desktop/libc2 Desktop/libc1
  4d3
  < for N in $NMSRVRS ; do echo "nameserver $N" >> "$TMPFILE" ; done
  6c5,6
  < [ "$RSLVCNFFILES" ] && sed -e '/^[[:space:]]*$/d' -e '/^[[:space:]]*#/d' -e '/^[[:space:]]*\(\(nameserver\)\|\(search\)\|\(domain\)\)[[:space:]]/d' $RSLVCNFFILES >> "$TMPFILE" 2>/dev/null
  ---
  > for N in $NMSRVRS ; do echo "nameserver $N" >> "$TMPFILE" ; done
  > [ "$RSLVCNFFILES" ] && sed -e '/^[[:space:]]*$/d' -e '/^[[:space:]]*#/d' -e '/^[[:space:]]*\(\(domain\)\|\(search\)\|\(nameserver\)\)[[:space:]]/d' $RSLVCNFFILES >> "$TMPFILE" 2>/dev/null

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: resolvconf 1.45ubuntu1
  ProcVersionSignature: Ubuntu 2.6.32-45.101-generic-pae 2.6.32.60+drm33.26
  Uname: Linux 2.6.32-45-generic-pae i686
  NonfreeKernelModules: nvidia
  Architecture: i386
  Date: Wed Dec 12 20:28:39 2012
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 10.04.2 LTS "Lucid Lynx" - Release i386 (20110214.1)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  SourcePackage: resolvconf

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