config/yum/lxc-patch.py

   1 # Yum plugin to re-patch container rootfs after a yum update is done
   2 #
   3 # Copyright (C) 2012 Oracle
   4 #
   5 # Authors:
   6 # Dwight Engen <dwight.engen@oracle.com>
   7 #
   8 # This library is free software; you can redistribute it and/or
   9 # modify it under the terms of the GNU Lesser General Public
  10 # License as published by the Free Software Foundation; either
  11 # version 2.1 of the License, or (at your option) any later version.
  12 #
  13 # This library is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 # Lesser General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU Lesser General Public
  19 # License along with this library; if not, write to the Free Software
  20 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  21 # USA
  22 #
  23
  24 import os
  25 from fnmatch import fnmatch
  26 from yum.plugins import TYPE_INTERACTIVE
  27
  28 requires_api_version = '2.0'
  29 plugin_type = (TYPE_INTERACTIVE,)
  30
  31 def posttrans_hook(conduit):
  32     pkgs = []
  33     patch_required = False
  34
  35     # If we aren't root, we can't have updated anything
  36     if os.geteuid():
  37         return
  38
  39     # See what packages have files that were patched
  40     confpkgs = conduit.confString('main', 'packages')
  41     if not confpkgs:
  42         return
  43
  44     tmp = confpkgs.split(",")
  45     for confpkg in tmp:
  46         pkgs.append(confpkg.strip())
  47
  48     conduit.info(2, "lxc-patch: checking if updated pkgs need patching...")
  49     ts = conduit.getTsInfo()
  50     for tsmem in ts.getMembers():
  51         for pkg in pkgs:
  52             if fnmatch(pkg, tsmem.po.name):
  53                 patch_required = True
  54     if patch_required:
  55         conduit.info(2, "lxc-patch: patching container...")
  56         os.spawnlp(os.P_WAIT, "lxc-patch", "lxc-patch", "--patch", "/")