On Sat, Feb 01, 2014 at 05:36:19PM -0800, Kevin O'Gorman wrote: > I'm about to tackle GPT partitioned disks, and want to decode the > label. > > The data is little-endian, but I want my code to work on little- or > big-endian machines. I want it to be a script -- nothing compiled. > > I've figured out that on my little-endian machines, I can use bash > with something like > otherlabel=$(($(dd if=label bs=1 skip=32 count=8 | od -An -t d8) ))
I am not quit understand why need dump the label, but it can be done easily by script language, say, Python. # --------- begin -------------- #!/usr/bin/env python # -*- coding: utf-8 -*- import sys from struct import unpack skip = 32 count = 8 fp = open(path_to_dd_image, 'rb').read(skip + count) data_of_interest = fp[skip:] if sys.byteorder == 'little': #assuming the label is a 8 bytes unsigned integer label = unpack('<Q', data_of_interest)[0] else: label = unpack('>Q', data_of_interest)[0] # --------- end -------------- -- Chen Wei -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20140202092853.GM25217@localhost