#!/usr/bin/python
#

# Copyright (C) 2010 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.


"""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()