Mail Archives: cygwin/2007/05/26/10:07:50
Hi Eric
B is 71.8 Mbytes and and according to ls A (actually data.dat) is:
-rw-r--r-- 1 trader None 4540030014 May 26 12:00 data.dat
I'm running the latest version of cygwin. I hope you are able to reproduce
the problem with dd using this information.
Cheers
Peter
-----Original Message-----
From: Eric Blake [mailto:ebb9 AT byu DOT net]
Sent: Saturday, 26 May 2007 10:59 PM
To: Peter Milne; cygwin AT cygwin DOT com
Subject: [Spam?]Re: problem concating (>>) to a large file
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http://cygwin.com/acronyms/#PPIOSPE - redirecting to the list
According to Peter Milne on 5/25/2007 9:55 PM:
> Hi Eric
>
> Thanks for responding to my query.
>
> Brian Dessent also responded. He suggested using the following command:
>
> dd if=B of=A bs=64k conv=notrunc oflag=append
>
> but this gave the same result as >>, that is, it stuck the contents of
file
> B at the front of A rather than at the end.
If that happened, it is a different bug, since dd does not go through the
stdio library, therefore does not see the bug in stdout being in 32-bit
mode instead of 64-bit mode. Exactly how big are a and b? I'd like to
try to reproduce this, and observe what strace has to say about it,
because I agree with Brian that it should work.
> It looks like dd is broken in
> this respect in the current version of cygwin. I wonder if dd will come
> good in 1.70.0 too? Do you have any idea when 1.70.0 will be released?
1.70.0? Not for many, many more years (after all, the 1.5.x series lasted
for several years). :) 1.7.0, on the other hand, might be released this
year, once it is ready. But in classic open source mindset, the release
will be sooner if you help.
- --
Don't work too hard, make some time for fun as well!
Eric Blake ebb9 AT byu DOT net
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