From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <1a892ff2fa15bc0030d37d39ea575c3e@proxima.alt.za>
To: 9fans@9fans.net
Date: Sun,  1 Feb 2009 13:56:05 +0200
From: lucio@proxima.alt.za
In-Reply-To: <921f62e676eeb09dca8bd58e6a3ffee3@terzarima.net>
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Subject: Re: [9fans] Pegasus 2.6 is released
Topicbox-Message-UUID: 907ba80a-ead4-11e9-9d60-3106f5b1d025

> well, i say "modules", but of course the language pre-dates
> them. people pretend.  it uses import/export tables with type signatures.
> those are stashed in the a.out (viz. DYN_MAGIC in a.out.h)
> so they stay together.

It's not what the OP suggested.  Nor are Nemo's reservation valid.
We're talking about loading source modules into an interpreter.  This
means that different modules may be loaded, sometimes even by the same
instruction and that libraries are not terribly significant unless the
invoker gets the sequence wrong, which is a programming error.

The remaining reservation is security, can somebody replace a module
with a Trojan horse?  In Plan 9 the risk is much smaller, I dare not
say non-existent.

Recent instances of the Korn shell have this feature.  Bolsky and Korn
describe these features in some details in "The New Korn Shell", 1995.

++L