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Re: random scsh ideas I don't have time to implement but someone should

To: Benard Aart Mesander <ben@piglet.cr.usgs.gov>
Subject: Re: random scsh ideas I don't have time to implement but someone should
From: Scott Schwartz <schwartz@galapagos.cse.psu.edu>
Date: Wed, 15 Feb 1995 23:53:16 -0500
Cc: scsh@martigny.ai.mit.edu
| - A scheme mail daemon - imagine a real language to do header
|   rewriting in, instead of line noise.

I think you underestimate the problem.  "line noise" in sendmail
is a compact way of writing complicated regular expressions.
In zmailer it is less compact, but there are still regexps.
Put them in S-expressions if you want, but the overall effect will
be similar if you solve the same problem.

| - A multi-threaded scheme ftpd that handles multiple connections -
|   so I don't get those damn "I'm sorry, but we only allow 1.5
|   connections from off campus at a time" messages anymore.

No, you get that message because those sites really do want to limit
the amount of network traffic they have to put up with.  The unix
kernel does a much better job of multiprocessing than any user-mode
solution will be able to.  Why complexify your ftp daemon when the
current arrangement is so simple and elegant: one process per
connection.  

Needless to say, in either case a one megabyte scheme
runtime system makes this idea a non-starter, especially for
sites who are limiting network connections due to performance
concerns!


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