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#! /usr/bin/python -Es
# Copyright (C) 2012 Red Hat
# see file 'COPYING' for use and warranty information
#
# setrans is a tool for analyzing process transistions in SELinux policy
#
# 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., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA
#
#
import sepolicy
import sys
search = sepolicy.search
info = sepolicy.info
def usage(parser, msg):
parser.print_help()
sys.stderr.write("\n%s\n" % msg)
sys.stderr.flush()
sys.exit(1)
def expand_attribute(attribute):
try:
return info(sepolicy.ATTRIBUTE, attribute)[0]["types"]
except RuntimeError:
return [attribute]
def get_types(src, tclass, perm):
allows = search([sepolicy.ALLOW], {sepolicy.SOURCE: src, sepolicy.CLASS: tclass, sepolicy.PERMS: perm})
if not allows:
raise ValueError("The %s type is not allowed to %s any types" % (src, ",".join(perm)))
tlist = []
for l in [y[sepolicy.TARGET] for y in [x for x in allows if set(perm).issubset(x[sepolicy.PERMS])]]:
tlist = tlist + expand_attribute(l)
return tlist