From: Hans-Bernhard Broeker <broeker AT acp3bf DOT physik DOT rwth-aachen DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Some dodgy FILE hackery
Date: 15 Mar 2000 18:30:00 GMT
Organization: Aachen University of Technology (RWTH)
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References: <8amfqu$ue5$1 AT newsg2 DOT svr DOT pol DOT co DOT uk> <200003150008 DOT TAA21146 AT envy DOT delorie DOT com> <38CFD37F DOT 44FD33CB AT bigfoot DOT com>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

JP Morris <doug-15 AT bigfoot DOT com> wrote:
> DJ Delorie wrote:
>> 
>> > So, using DJGPP, is there a way to intercept read() and write() in order to
>> > encrypt/decrypt the data they are writing/reading? How do I do it?
>> 
>> Use file system extensions.  See "File System Extensions" in the docs,
>> or http://www.delorie.com/djgpp/doc/libc-2.02/libc_284.html

> Presumably this is seriously unportable.

So what? The OP specifically asked for a solution based 'using DJGPP',
and this is the DJGPP newsgroup. And of course, read() and write()
themselves are already unportable (to non-Unix systems, at the least),
so intercepting such system calls must be seriously unportable by
definition of the task.
-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.