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63 lines
2.6 KiB
Python
Executable file
63 lines
2.6 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# Dump partitions to file.
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#
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# Copyright (C) 2015 Peter Wu <peter@lekensteyn.nl>
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# Licensed under the MIT license <http://opensource.org/licenses/MIT>.
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from contextlib import closing
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import argparse, logging, os, struct
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import lglaf, partitions
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_logger = logging.getLogger("extract-partitions")
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parser = argparse.ArgumentParser()
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parser.add_argument("-d", "--outdir", default=".",
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help="Output directory for disk images.")
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# Do not dump partitions larger than this size
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# (userdata 11728 MiB, system 2064 MiB, cache 608 MiB, cust 256 MiB)
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parser.add_argument("--max-size", metavar="kbytes", type=int, default=65535,
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help="Maximum partition size to dump (in KiB) or 0 to dump all (default %(default)d)")
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parser.add_argument("--debug", action='store_true', help="Enable debug messages")
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def dump_partitions(comm, disk_fd, outdir, max_size):
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parts = partitions.get_partitions(comm)
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for part_label, part_name in parts.items():
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part_offset, part_size = partitions.partition_info(comm, part_name)
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if max_size and part_size > max_size:
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_logger.info("Ignoring large partition %s (%s) of size %dK",
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part_label, part_name, part_size / 1024)
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continue
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out_path = os.path.join(outdir, "%s.bin" % part_name)
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try:
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current_size = os.path.getsize(out_path)
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if current_size > part_size:
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_logger.warn("%s: unexpected size %dK, larger than %dK",
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out_path, current_size / 1024, part_size / 1024)
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continue
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elif current_size == part_size:
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_logger.info("Skipping partition %s (%s), already found at %s",
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part_label, part_name, out_path)
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continue
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except OSError: pass
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_logger.info("Dumping partition %s (%s) to %s (%d bytes)",
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part_label, part_name, out_path, part_size)
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partitions.dump_partition(comm, disk_fd, out_path, part_offset, part_size)
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def main():
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args = parser.parse_args()
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logging.basicConfig(format='%(asctime)s %(name)s: %(levelname)s: %(message)s',
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level=logging.DEBUG if args.debug else logging.INFO)
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try: os.makedirs(args.outdir)
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except OSError: pass
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comm = lglaf.autodetect_device()
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with closing(comm):
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lglaf.try_hello(comm)
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with partitions.laf_open_disk(comm) as disk_fd:
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_logger.debug("Opened fd %d for disk", disk_fd)
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dump_partitions(comm, disk_fd, args.outdir, args.max_size * 1024)
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if __name__ == '__main__':
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main()
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