source4/scripting/python/samba/xattr.py

   1 #!/usr/bin/env python
   2 # vim: expandtab
   3 #
   4 # Utility code for dealing with POSIX extended attributes
   5 #
   6 # Copyright (C) Matthieu Patou <mat@matws.net> 2009 - 2010
   7 # Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2012
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 from samba.dcerpc import xattr
  23 import os
  24 import samba.xattr_native
  25 import shutil
  26
  27
  28 def copytree_with_xattrs(source, target):
  29     """Copy a tree but preserve extended attributes.
  30
  31     :param source: Source tree path
  32     :param target: Target path
  33     """
  34     shutil.copytree(source, target)
  35     copyxattrs(target, source)
  36
  37
  38 def copyxattrs(dir, refdir):
  39     """Copy extended attributes from a reference dir to a destination dir
  40
  41     Both dir are supposed to hold the same files
  42     :param dir: Destination dir
  43     :param refdir: Reference directory"""
  44
  45     for root, dirs, files in os.walk(dir, topdown=True):
  46         for name in files:
  47             subdir = root[len(dir):]
  48             ref = os.path.join(refdir, subdir, name)
  49             statsinfo = os.stat(ref)
  50             tgt = os.path.join(root, name)
  51             try:
  52                 os.chown(tgt, statsinfo.st_uid, statsinfo.st_gid)
  53                 # Get the xattr attributes if any
  54                 try:
  55                     attribute = samba.xattr_native.wrap_getxattr(ref,
  56                                                  xattr.XATTR_NTACL_NAME)
  57                     samba.xattr_native.wrap_setxattr(tgt,
  58                                                  xattr.XATTR_NTACL_NAME,
  59                                                  attribute)
  60                 except Exception:
  61                     pass
  62                     # FIXME:Catch a specific exception
  63                 attribute = samba.xattr_native.wrap_getxattr(ref,
  64                                                  "system.posix_acl_access")
  65                 samba.xattr_native.wrap_setxattr(tgt,
  66                                                  "system.posix_acl_access",
  67                                                   attribute)
  68             except Exception:
  69                 # FIXME: Catch a specific exception
  70                 continue
  71         for name in dirs:
  72             subdir = root[len(dir):]
  73             ref = os.path.join(refdir, subdir, name)
  74             statsinfo = os.stat(ref)
  75             tgt = os.path.join(root, name)
  76             try:
  77                 os.chown(os.path.join(root, name), statsinfo.st_uid,
  78                           statsinfo.st_gid)
  79                 try:
  80                     attribute = samba.xattr_native.wrap_getxattr(ref,
  81                                                  xattr.XATTR_NTACL_NAME)
  82                     samba.xattr_native.wrap_setxattr(tgt,
  83                                                  xattr.XATTR_NTACL_NAME,
  84                                                  attribute)
  85                 except Exception:
  86                     pass # FIXME: Catch a specific exception
  87                 attribute = samba.xattr_native.wrap_getxattr(ref,
  88                                                  "system.posix_acl_access")
  89                 samba.xattr_native.wrap_setxattr(tgt,
  90                                                  "system.posix_acl_access",
  91                                                   attribute)
  92
  93             except Exception:
  94                 continue