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From Brian Behlendorf <>
Subject Re: it's late...but here is an idea [ (Cliff Skolnick)] (fwd)
Date Mon, 10 Jul 1995 08:34:17 GMT

Remember to post from Organic next time cliff...


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From: (Cliff Skolnick)
Date: Sat, 8 Jul 1995 12:33:00 PST
In-Reply-To: (Robert S. Thau)
       "Re: it's late...but here is an idea" (Jul  8, 11:26am)
X-Mailer: Mail User's Shell (7.1.1 5/02/90)
To: (Robert S. Thau)
Subject: Re: it's late...but here is an idea

On Jul 8, 11:26am, Robert S. Thau wrote:
} As a first note, the cost of the scheme above really is a bit high.
} As near as I can tell, the server more or less has to fork so that
} your "handler 1" and "handler 2" run in separate execution contexts,
} and fork() is something that I at least am trying to get away from.
} ("handler 1" and "handler 2" will generally deadlock if they are run
} in the same process, and are processing a document of nontrivial size
} --- "handler 1" writes enough to fill the pipe and then blocks,
} guaranteeing that "handler 2" will never be run to read it back out).

True, but still less than the cost of a CGI.

} I had been thinking about giving modules some kind of access to SSI,
} which is at least one of the things your scheme would accomplish, but
} along very different lines --- basically, of keeping the current SSI
} includes module as a framework, but giving *it* an API which would
} allow other modules to register their own SSI directives.  This avoids
} the difficulties involved in trying to somehow stack response
} handlers, and just as importantly, it guarantees users some basic
} consistency in the syntax of new directives, or at least in the ways
} those new directives are set off from the enclosing text (which might
} otherwise be all over the map).

OK, I see what you are saying here.  In Fact, I agree that this would
be a better solution and easier to get running.  I hope the restriction
on format is only a small one, I would like to really add any tag.  [Note
not that I support adding those tags, but I feel that the mechanism should
be very general.]

} In closing, my general feeling is that if you want to ship soon, then
} it's too late to get something like this into the first release --- it
} has to be designed right, or it will come back to haunt us.

Should have #ifdef  FUTURE'd my email :) I like your thoughts better
than my original one, I'll retract my suggestion.


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