autotools/check-tar

#!/usr/bin/python
#

# Copyright (C) 2010 Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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"""Script to check tarball generated by Automake.

"""

import sys
import stat
import tarfile


def ReportError(member, msg):
  print >>sys.stderr, "%s: %s" % (member.name, msg)


def main():
  tf = tarfile.open(fileobj=sys.stdin)

  success = True

  for member in tf.getmembers():
    if member.uid != 0:
      success = False
      ReportError(member, "Owned by UID %s, not UID 0" % member.uid)

    if member.gid != 0:
      success = False
      ReportError(member, "Owned by GID %s, not GID 0" % member.gid)

    if member.mode & (stat.S_IWGRP | stat.S_IWOTH):
      success = False
      ReportError(member, "World or group writeable (mode is %o)" % member.mode)

  if success:
    sys.exit(0)

  sys.exit(1)


if __name__ == "__main__":
  main()