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#!/usr/bin/env python
# Copyright (C) 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Takes output of
# adb shell 'find /data -print0 | xargs -0 ls -ldZ' | awk '{print $5 " " $9}'
# in standard input and generates list of directories we need to scan to cover
# the labels given on the command line.
import sys
import argparse
class Node(object):
def __init__(self, name, label=None):
self.name = name
self.label = label
self.marked = False
self.children = {}
def Find(self, components):
if not components:
return self
child = components[0]
if child in self.children:
return self.children[child].Find(components[1:])
n = Node(child)
self.children[child] = n
return n
def __iter__(self):
for child in self.children.itervalues():
yield self.name + '/' + child.name, child
for p, ch in child:
yield self.name + '/' + p, ch
def Mark(self, labels):
# Either incorrect label or already marked, we do not need to scan
# this path.
if self.marked or self.label not in labels:
return False
self.marked = True
for child in self.children.itervalues():
child.Mark(labels)
return True
def BuildTree(stream=sys.stdin):
root = Node("")
for line in stream:
line = line.strip()
if not line:
continue
label, path = line.split(' ', 1)
# u:object_r:system_data_file:s0 -> system_data_file.
sanitized_label = label.split(':')[2]
# Strip leading slash.
components = path[1:].split('/')
n = root.Find(components)
n.label = sanitized_label
return root
def main():
parser = argparse.ArgumentParser()
parser.add_argument(
'labels', metavar='L', type=str, nargs='+', help='labels we want to find')
args = parser.parse_args()
root = BuildTree()
for fullpath, elem in root:
if elem.Mark(args.labels):
print fullpath
if __name__ == '__main__':
main()
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