Quite often I find myself with the task of extracting data from files such
as CD images. These files "encapsulate" the needed data bloks in larger
blocks with a header and possibly some tailing data. E.g. a typical
.bin/.cue CD image has each 2048 usable data sector encapsulated in a 2352
byte block with a 16-byte header. I usually create simple C programs to
handle this, but I think that dd would be more suited for such operations.
I would suggest the following additional dd arguments:
iskip=N : skip N bytes before each input block
iskiptail=N : skip N bytes after each input block
oseek=N : seek N bytes before each output block
oseektail=N : seek N bytes after each output block
I guess N could also be in blocks, but for operations like the one I
mentioned one would have to use an extremely small block size, resulting
in a LOT of read/write syscalls.
Is there any hope of something like this being included in coreutils ? Or
would it be better suited for a separate dd-like utility ?
Regards,
Theodoros Kalamatianos
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