+++ /dev/null
-#! /usr/bin/env python
-
-# Copyright (C) 2012 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.
-
-from __future__ import print_function
-import getopt, posixpath, signal, struct, sys
-
-def usage(argv0):
- print("""
-Usage: %s [-v] sparse_image_file ...
- -v verbose output
-""" % ( argv0 ))
- sys.exit(2)
-
-def main():
-
- signal.signal(signal.SIGPIPE, signal.SIG_DFL)
-
- me = posixpath.basename(sys.argv[0])
-
- # Parse the command line
- verbose = 0 # -v
- try:
- opts, args = getopt.getopt(sys.argv[1:],
- "v",
- ["verbose"])
- except getopt.GetoptError, e:
- print(e)
- usage(me)
- for o, a in opts:
- if o in ("-v", "--verbose"):
- verbose += 1
- else:
- print("Unrecognized option \"%s\"" % (o))
- usage(me)
-
- if len(args) == 0:
- print("No sparse_image_file specified")
- usage(me)
-
- for path in args:
- FH = open(path, 'rb')
- header_bin = FH.read(28)
- header = struct.unpack("<I4H4I", header_bin)
-
- magic = header[0]
- major_version = header[1]
- minor_version = header[2]
- file_hdr_sz = header[3]
- chunk_hdr_sz = header[4]
- blk_sz = header[5]
- total_blks = header[6]
- total_chunks = header[7]
- image_checksum = header[8]
-
- if magic != 0xED26FF3A:
- print("%s: %s: Magic should be 0xED26FF3A but is 0x%08X"
- % (me, path, magic))
- continue
- if major_version != 1 or minor_version != 0:
- print("%s: %s: I only know about version 1.0, but this is version %u.%u"
- % (me, path, major_version, minor_version))
- continue
- if file_hdr_sz != 28:
- print("%s: %s: The file header size was expected to be 28, but is %u."
- % (me, path, file_hdr_sz))
- continue
- if chunk_hdr_sz != 12:
- print("%s: %s: The chunk header size was expected to be 12, but is %u."
- % (me, path, chunk_hdr_sz))
- continue
-
- print("%s: Total of %u %u-byte output blocks in %u input chunks."
- % (path, total_blks, blk_sz, total_chunks))
-
- if image_checksum != 0:
- print("checksum=0x%08X" % (image_checksum))
-
- if not verbose:
- continue
- print(" input_bytes output_blocks")
- print("chunk offset number offset number")
- offset = 0
- for i in xrange(1,total_chunks+1):
- header_bin = FH.read(12)
- header = struct.unpack("<2H2I", header_bin)
- chunk_type = header[0]
- reserved1 = header[1]
- chunk_sz = header[2]
- total_sz = header[3]
- data_sz = total_sz - 12
-
- print("%4u %10u %10u %7u %7u" % (i, FH.tell(), data_sz, offset, chunk_sz),
- end=" ")
-
- if chunk_type == 0xCAC1:
- if data_sz != (chunk_sz * blk_sz):
- print("Raw chunk input size (%u) does not match output size (%u)"
- % (data_sz, chunk_sz * blk_sz))
- break;
- else:
- print("Raw data", end="")
- FH.read(data_sz)
- elif chunk_type == 0xCAC2:
- if data_sz != 4:
- print("Fill chunk should have 4 bytes of fill, but this has %u"
- % (data_sz), end="")
- break;
- else:
- fill_bin = FH.read(4)
- fill = struct.unpack("<I", fill_bin)
- print("Fill with 0x%08X" % (fill))
- elif chunk_type == 0xCAC3:
- if data_sz != 0:
- print("Don't care chunk input size is non-zero (%u)" % (data_sz))
- break;
- else:
- print("Don't care", end="")
- elif chunk_type == 0xCAC4:
- if data_sz != 4:
- print("CRC32 chunk should have 4 bytes of CRC, but this has %u"
- % (data_sz), end="")
- break;
- else:
- crc_bin = FH.read(4)
- crc = struct.unpack("<I", crc)
- print("Unverified CRC32 0x%08X" % (crc))
- else:
- print("Unknown chunk type 0x%04X" % (chunk_type), end="")
- break;
-
- if verbose > 1:
- header = struct.unpack("<12B", header_bin)
- print(" (%02X%02X %02X%02X %02X%02X%02X%02X %02X%02X%02X%02X)"
- % (header[0], header[1], header[2], header[3],
- header[4], header[5], header[6], header[7],
- header[8], header[9], header[10], header[11]))
- else:
- print()
-
- offset += chunk_sz
-
- print(" %10u %7u End" % (FH.tell(), offset))
-
- if total_blks != offset:
- print("The header said we should have %u output blocks, but we saw %u"
- % (total_blks, offset))
-
- junk_len = len(FH.read())
- if junk_len:
- print("There were %u bytes of extra data at the end of the file."
- % (junk_len))
-
- sys.exit(0)
-
-if __name__ == "__main__":
- main()
projects / project / make_ext4fs.git / blobdiff