From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <006a01c0ccb7$5990b0b0$95b9c6d4@SOMA>
From: "Boyd Roberts" <boyd@planete.net>
To: <9fans@cse.psu.edu>
References: <20010423110853.3397219A61@mail.cse.psu.edu> <3AE4B6C2.28D1E595@arl.army.mil>
Subject: Re: [9fans] the declaration of main()
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Date: Tue, 24 Apr 2001 14:09:01 +0200
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From: "Douglas A. Gwyn" <gwyn@arl.army.mil>
> I don't understand what you're talking about.  In 7th Edition
> Unix, which is where exit status and stdio were first widely
> used, return from main() (with or without a value) would
> automatically invoke the exit() function, which in turn
> invoked cleanup(), which if any stdio function was used
> would link with the buffer-flushing version instead of the
> no-op version.  Explicitly calling exit() would get the same
> exit() function, the same cleanup() function, etc.

yep, IIRC, sounds like the 7th ed /lib/crt0.s which eventually
called _exit() [the syscall].  exit() was a library function
which did the above and then called _exit().