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      1 # Authors: Karl MacMillan <kmacmillan (at] mentalrootkit.com>
      2 #
      3 # Copyright (C) 2006 Red Hat
      4 # see file 'COPYING' for use and warranty information
      5 #
      6 # This program is free software; you can redistribute it and/or
      7 # modify it under the terms of the GNU General Public License as
      8 # published by the Free Software Foundation; version 2 only
      9 #
     10 # This program is distributed in the hope that it will be useful,
     11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13 # GNU General Public License for more details.
     14 #
     15 # You should have received a copy of the GNU General Public License
     16 # along with this program; if not, write to the Free Software
     17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
     18 #
     19 
     20 import os
     21 import re
     22 
     23 # Select the correct location for the development files based on a
     24 # path variable (optionally read from a configuration file)
     25 class PathChoooser(object):
     26     def __init__(self, pathname):
     27         self.config = dict()
     28         if not os.path.exists(pathname):
     29             self.config_pathname = "(defaults)"
     30             self.config["SELINUX_DEVEL_PATH"] = "/usr/share/selinux/default:/usr/share/selinux/mls:/usr/share/selinux/devel"
     31             return
     32         self.config_pathname = pathname
     33         ignore = re.compile(r"^\s*(?:#.+)?$")
     34         consider = re.compile(r"^\s*(\w+)\s*=\s*(.+?)\s*$")
     35         for lineno, line in enumerate(open(pathname)):
     36             if ignore.match(line): continue
     37             mo = consider.match(line)
     38             if not mo:
     39                 raise ValueError("%s:%d: line is not in key = value format" % (pathname, lineno+1))
     40             self.config[mo.group(1)] = mo.group(2)
     41 
     42     # We're only exporting one useful function, so why not be a function
     43     def __call__(self, testfilename, pathset="SELINUX_DEVEL_PATH"):
     44         paths = self.config.get(pathset, None)
     45         if paths is None:
     46             raise ValueError("%s was not in %s" % (pathset, self.config_pathname))
     47         paths = paths.split(":")
     48         for p in paths:
     49             target = os.path.join(p, testfilename)
     50             if os.path.exists(target): return target
     51         return os.path.join(paths[0], testfilename)
     52 
     53 
     54 """
     55 Various default settings, including file and directory locations.
     56 """
     57 
     58 def data_dir():
     59     return "/var/lib/sepolgen"
     60 
     61 def perm_map():
     62     return data_dir() + "/perm_map"
     63 
     64 def interface_info():
     65     return data_dir() + "/interface_info"
     66 
     67 def attribute_info():
     68     return data_dir() + "/attribute_info"
     69 
     70 def refpolicy_makefile():
     71     chooser = PathChoooser("/etc/selinux/sepolgen.conf")
     72     return chooser("Makefile")
     73 
     74 def headers():
     75     chooser = PathChoooser("/etc/selinux/sepolgen.conf")
     76     return chooser("include")
     77 
     78