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re: md5.h

Subject: re: md5.h
From: email@hidden
Date: Thu, 26 Feb 2004 07:09:09 -0800

Justin,

Thanks for responding.

On Feb 25, 2004, at 10:00 PM, email@hidden wrote:

Hello, all ...

Hey, I see md5.h in /usr/include/sys ... but I can't seem to find the
library to link with (i'm trying to use MD5File()). This is what I
tried:

[snip]
... a few quick nm's didn't seem to find MD5 stuff in anything but
/usr/lib/libcrypto,dylib. What am I missing?

You are missing the realization that you should not be using headers
from /usr/include/sys in user-level code (with a few exceptions that
are *very* system-specific). If the identifiers are declared in a
<sys/...> header, they will generally be declared and instantiated in
the kernel, and your code can't user them.

After I posted the above question, I found /usr/include/openssl/md5.h, which -- lo and behold -- did not include the MD5File() prototype. So, I downloaded the text_cmds project from Darwin 7, found how it calculated the MD5 sum for a file, and followed its' example. My question now is simply: Why is /usr/include/sys/md5.h even there? No lib on my 10.3.2 box exports the MD5File() function, and from your response, I shouldn't even be using this include file.

Regards,

John

Falling You - exploring the beauty of voice and sound
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