def get_leb_size(path):
f = open(path, "rb")
f.seek(0, 2)
file_size = f.tell() + 1
f.seek(0)
block_size = 0
for i in range(0, file_size, FILE_CHUNK_SZ):
buf = f.read(FILE_CHUNK_SZ)
for m in re.finditer(UBIFS_NODE_MAGIC, buf):
start = m.start()
chdr = nodes.common_hdr(buf[start : start + UBIFS_COMMON_HDR_SZ])
if chdr and chdr.node_type == UBIFS_SB_NODE:
sb_start = start + UBIFS_COMMON_HDR_SZ
sb_end = sb_start + UBIFS_SB_NODE_SZ
if chdr.len != len(buf[sb_start:sb_end]):
f.seek(sb_start)
buf = f.read(UBIFS_SB_NODE_SZ)
else:
buf = buf[sb_start:sb_end]
sbn = nodes.sb_node(buf)
block_size = sbn.leb_size
f.close()
return block_size
f.close()
return block_size
def get_leb_size(path): f = open(path, 'rb') f.seek(0, 2) file_size = f.tell() + 1 f.seek(0) block_size = 0 for i in range(0, file_size, FILE_CHUNK_SZ): buf = f.read(FILE_CHUNK_SZ) for m in re.finditer(UBIFS_NODE_MAGIC, buf): start = m.start() chdr = nodes.common_hdr(buf[start:start + UBIFS_COMMON_HDR_SZ]) if chdr and chdr.node_type == UBIFS_SB_NODE: sb_start = start + UBIFS_COMMON_HDR_SZ sb_end = sb_start + UBIFS_SB_NODE_SZ if chdr.len != len(buf[sb_start:sb_end]): f.seek(sb_start) buf = f.read(UBIFS_SB_NODE_SZ) else: buf = buf[sb_start:sb_end] sbn = nodes.sb_node(buf) block_size = sbn.leb_size f.close() return block_size f.close() return block_size
def sb_node(ubifs, offset=0):
"""Get superblock node at given LEB number + offset.
Arguments:
Obj:ubifs -- UBIFS object.
Int:offset -- Offset in LEB of superblock node.
Returns:
Obj:sb_node -- Superblock node found at lnum/offset.
"""
ubifs.file.seek(offset)
return nodes.sb_node(ubifs.file.read(UBIFS_SB_NODE_SZ))
def sb_node(ubifs, offset=0):
"""Get superblock node at given LEB number + offset.
Arguments:
Obj:ubifs -- UBIFS object.
Int:offset -- Offset in LEB of superblock node.
Returns:
Obj:sb_node -- Superblock node found at lnum/offset.
"""
ubifs.file.seek(offset)
return nodes.sb_node(ubifs.file.read(UBIFS_SB_NODE_SZ))
def get_leb_size(path):
"""Get LEB size from superblock
Arguments:
Str:path -- Path to file.
Returns:
Int -- LEB size.
Searches file superblock and retrieves leb size.
"""
f = open(path, 'rb')
f.seek(0, 2)
file_size = f.tell() + 1
f.seek(0)
block_size = 0
for i in range(0, file_size, FILE_CHUNK_SZ):
buf = f.read(FILE_CHUNK_SZ)
for m in re.finditer(UBIFS_NODE_MAGIC, buf):
start = m.start()
chdr = nodes.common_hdr(buf[start:start + UBIFS_COMMON_HDR_SZ])
if chdr and chdr.node_type == UBIFS_SB_NODE:
sb_start = start + UBIFS_COMMON_HDR_SZ
sb_end = sb_start + UBIFS_SB_NODE_SZ
if chdr.len != len(buf[sb_start:sb_end]):
f.seek(sb_start)
buf = f.read(UBIFS_SB_NODE_SZ)
else:
buf = buf[sb_start:sb_end]
sbn = nodes.sb_node(buf)
block_size = sbn.leb_size
f.close()
return block_size
f.close()
return block_size
def get_leb_size(path):
"""Get LEB size from superblock
Arguments:
Str:path -- Path to file.
Returns:
Int -- LEB size.
Searches file superblock and retrieves leb size.
"""
f = open(path, 'rb')
f.seek(0,2)
file_size = f.tell()+1
f.seek(0)
block_size = 0
for i in range(0, file_size, FILE_CHUNK_SZ):
buf = f.read(FILE_CHUNK_SZ)
for m in re.finditer(UBIFS_NODE_MAGIC, buf):
start = m.start()
chdr = nodes.common_hdr(buf[start:start+UBIFS_COMMON_HDR_SZ])
if chdr and chdr.node_type == UBIFS_SB_NODE:
sb_start = start + UBIFS_COMMON_HDR_SZ
sb_end = sb_start + UBIFS_SB_NODE_SZ
if chdr.len != len(buf[sb_start:sb_end]):
f.seek(sb_start)
buf = f.read(UBIFS_SB_NODE_SZ)
else:
buf = buf[sb_start:sb_end]
sbn = nodes.sb_node(buf)
block_size = sbn.leb_size
f.close()
return block_size
f.close()
return block_size
def sb_node(ubifs, offset = 0):
ubifs.file.seek(offset)
return nodes.sb_node(ubifs.file.read(UBIFS_SB_NODE_SZ))
def sb_node(ubifs, offset=0):
ubifs.file.seek(offset)
return nodes.sb_node(ubifs.file.read(UBIFS_SB_NODE_SZ))
