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Date:	Mon, 26 Oct 2009 22:31:39 -0400
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Subject:	Re: How to increase the memory available to diff in cygwin 1.7?
From:	"Mark J. Reed" <markjreed AT gmail DOT com>
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On Monday, October 26, 2009, Kenneth Chiu  wrote:
> cmp doesn't recurse, though, at least as far as I can tell.
> In theory, I could use find, then cmp, plus some scripting,
> but seems simpler to just write a small C program
> to do it.

Well, as a start, you could try this:

find "$src" -type f -print | while read f; do cmp "$f"  "${f/$src/$dest}" ; done

The concatenation of its stdout and stderr will include
distinguishable lines enumerating the following sets:

 all files in "$dest" that differ from the corresponding file in "$src"
 all directories in "$dest" that correspond to files in "$src" and vice-versa
 all pathnames under "$dest" that don't exist despite there being a
corresponding file under "$src"

Which seems to be all the information you were looking for.  You can
then postprocess the output to format it however you like.

Nothing there screams C to me.  Perl, maybe...

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