147 lines
5.3 KiB
Python
Executable file
147 lines
5.3 KiB
Python
Executable file
#! /usr/bin/env python
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# Copyright (c) 2015, The Linux Foundation. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of The Linux Foundation nor
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# the names of its contributors may be used to endorse or promote
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""
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Android kernel configuration validator.
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The Android kernel reference trees contain some config stubs of
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configuration options that are required for Android to function
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correctly, and additional ones that are recommended.
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This script can help compare these base configs with the ".config"
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output of the compiler to determine if the proper configs are defined.
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"""
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from collections import namedtuple
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from optparse import OptionParser
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import re
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import sys
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version = "check-config.py, version 0.0.1"
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req_re = re.compile(r'''^CONFIG_(.*)=(.*)$''')
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forb_re = re.compile(r'''^# CONFIG_(.*) is not set$''')
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comment_re = re.compile(r'''^(#.*|)$''')
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Enabled = namedtuple('Enabled', ['name', 'value'])
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Disabled = namedtuple('Disabled', ['name'])
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def walk_config(name):
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with open(name, 'r') as fd:
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for line in fd:
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line = line.rstrip()
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m = req_re.match(line)
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if m:
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yield Enabled(m.group(1), m.group(2))
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continue
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m = forb_re.match(line)
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if m:
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yield Disabled(m.group(1))
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continue
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m = comment_re.match(line)
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if m:
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continue
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print "WARNING: Unknown .config line: ", line
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class Checker():
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def __init__(self):
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self.required = {}
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self.exempted = set()
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self.forbidden = set()
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def add_required(self, fname):
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for ent in walk_config(fname):
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if type(ent) is Enabled:
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self.required[ent.name] = ent.value
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elif type(ent) is Disabled:
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if ent.name in self.required:
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del self.required[ent.name]
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self.forbidden.add(ent.name)
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def add_exempted(self, fname):
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with open(fname, 'r') as fd:
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for line in fd:
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line = line.rstrip()
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self.exempted.add(line)
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def check(self, path):
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failure = False
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# Don't run this for mdm targets
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if re.search('mdm', path):
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print "Not applicable to mdm targets... bypassing"
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else:
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for ent in walk_config(path):
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# Go to the next iteration if this config is exempt
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if ent.name in self.exempted:
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continue
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if type(ent) is Enabled:
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if ent.name in self.forbidden:
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print "error: Config should not be present: %s" %ent.name
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failure = True
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if ent.name in self.required and ent.value != self.required[ent.name]:
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print "error: Config has wrong value: %s %s expecting: %s" \
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%(ent.name, ent.value, self.required[ent.name])
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failure = True
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elif type(ent) is Disabled:
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if ent.name in self.required:
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print "error: Config should be present, but is disabled: %s" %ent.name
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failure = True
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if failure:
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sys.exit(1)
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def main():
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usage = """%prog [options] path/to/.config"""
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parser = OptionParser(usage=usage, version=version)
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parser.add_option('-r', '--required', dest="required",
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action="append")
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parser.add_option('-e', '--exempted', dest="exempted",
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action="append")
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(options, args) = parser.parse_args()
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if len(args) != 1:
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parser.error("Expecting a single path argument to .config")
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elif options.required is None or options.exempted is None:
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parser.error("Expecting a file containing required configurations")
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ch = Checker()
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for r in options.required:
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ch.add_required(r)
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for e in options.exempted:
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ch.add_exempted(e)
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ch.check(args[0])
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if __name__ == '__main__':
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main()
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