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97 lines
2.4 KiB
97 lines
2.4 KiB
4 months ago
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#!/usr/bin/env python3
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# Copyright (C) 2020 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Extract boot.img from a GKI APEX.
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Usage: extract_img_from_apex [--tool host_tool [--tool ...]] \
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input_gki.apex out_dir
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"""
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import logging
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import os
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import sys
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import common
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APEX_PAYLOAD_FILE = "apex_payload.img"
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APEX_PAYLOAD_BIN_PATH = "/etc/ota/payload.bin"
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logger = logging.getLogger(__name__)
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OPTIONS = common.OPTIONS
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def ExtractImagesFromApex(apex, out_dir):
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if not os.path.isdir(out_dir):
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os.makedirs(out_dir)
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apex_dir = common.UnzipTemp(apex, [APEX_PAYLOAD_FILE])
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apex_payload = os.path.join(apex_dir, APEX_PAYLOAD_FILE)
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payload_bin = common.MakeTempFile("payload_", ".bin")
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debugfs_command = ['debugfs', '-R', "dump {} {}".format(
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APEX_PAYLOAD_BIN_PATH, payload_bin), apex_payload]
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common.RunAndCheckOutput(debugfs_command)
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assert os.path.getsize(payload_bin) > 0, payload_bin + " is an empty file!"
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boot_img = os.path.join(out_dir, 'boot.img')
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with open(boot_img, 'w') as _:
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pass
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delta_generator_command = [
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'delta_generator',
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'--is_partial_update=true',
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'--in_file=' + payload_bin,
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'--partition_names=boot',
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'--new_partitions=' + boot_img
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]
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common.RunAndCheckOutput(delta_generator_command)
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def main(argv):
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def option_handler(o, a):
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if o == "--tool":
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name = os.path.basename(a)
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common.SetHostToolLocation(name, a)
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else:
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return False
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return True
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args = common.ParseOptions(
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argv, __doc__,
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extra_long_opts=["tool="],
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extra_option_handler=option_handler)
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if len(args) != 2:
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common.Usage(__doc__)
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sys.exit(1)
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common.InitLogging()
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ExtractImagesFromApex(args[0], args[1])
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logger.info("done.")
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if __name__ == '__main__':
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try:
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common.CloseInheritedPipes()
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main(sys.argv[1:])
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except common.ExternalError:
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logger.exception("\n ERROR:\n")
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sys.exit(1)
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finally:
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common.Cleanup()
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