On 09/07/19 16:56, Rob Landley wrote:
On 7/8/19 10:41 PM, scsijon wrote:
I was wondering if you would consider adding parts of ddfldd
(https://linuxx.info/dcfldd/, https://linux.die.net/man/1/dcfldd and
http://dcfldd.sourceforge.net/) rather than having just the ordinary dd 'bits'
to your dd implementation if possible?
What specific feature(s) are you asking for?
I know it's not new, but the extra
operands "pattern, textpattern and errlog" at least seem to be somewhat more
than just clearly usefull, with maybe the pair "hash and hashwindow" also if
possible.
Um...
dcfldd is a newer version of dccifd, is functionally the same, but in parallel
able to calculate checksum using hashing algorithms are MD5, SHA-1 and SHA-2,
while it extends partially (by subscription).
This differs from piping it through sha1sum how? Never having used this, it's
not immediately obvious how or why to...
Or do you have some other way we can deal with these combined
functions easily?
Pipelines? This is why Doug McIlroy suggested the pipe operator somewhere around
1973?
yes "hello" | dd
And as usual, i'll state that i'm not a coder nowadays, just a builder with a 3d
perspective outlook, I can't give you a patch, just an idea for someone to work
with. :-)}
Could you give me some usage examples?
ok, this is the usual example given for it,
dcfldd if=/dev/source hash=md5,sha512 hashwindow=1G md5log=md5.txt
sha512log=sha512.txt \hashconv=after bs=512 conv=noerror,sync split=1G
splitformat=aa of=image.dd
and all done without external pipe, etc. overheads.
My normal use though, is for fixing and changing formats in .iso and
.img files, saves a total rebuild of an iso just to fix a typo, a bane
in my life at least (if not also for others) when a iso and img.gz are
just about ready for a release which is why I would like pattern and
textpattern added.
Rob
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