GNU bug report logs - #8294
Minor nit with dd

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Message #8 received at 8294 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: John Morris <jmorris <at> beau.org>
Cc: 8294 <at> debbugs.gnu.org
Subject: Re: bug#8294: Minor nit with dd
Date: Sat, 19 Mar 2011 19:03:48 -0700

On 03/19/2011 11:26 AM, John Morris wrote:
> On a 64bit platform shouldn't the following command have done the
> expected thing instead of quietly clipping to 231?

It depends on what your platform's 64-bit 'read'
system call does.  My guess is that your platform's
'read' syscall refuses to read more than
2**31 - 2**12 bytes at a time from /dev/zero,
so the problem (if any :-) is with 'read', not
with 'dd'.

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