#!/usr/bin/env python
# Find ext2/ext3 filesystems within a disk (image).
# Adam Sampson <ats@offog.org>

from struct import unpack

f = open("/dev/hda")

block = 0
while 1:
	if block % 1000 == 0:
		print block
	f.seek(512 * (63 + (1008 * block)))
	d = f.read(2048)
	if unpack("<H", d[0x438:0x43a]) == (0xEF53,):
		ra = unpack("<L", d[0x44c:0x450])[0]
		rb = unpack("<H", d[0x43e:0x440])[0]
		v = unpack("<L", d[0x45c:0x460])[0]
		if (v & 0x4) == 0:
			ver = "ext2"
		else:
			ver = "ext3"

		print "found at %d v%d.%d %s" % (block, ra, rb, ver)
	block += 1

f.close()