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Date:      Thu, 13 Aug 1998 22:00:03 -0700 (PDT)
From:      Jim Shankland <jas@flyingfox.com>
To:        brawley@camtech.com.au, hackers@FreeBSD.ORG, mph@pobox.com
Subject:   Re: 64-bit time_t
Message-ID:  <199808140500.WAA08017@biggusdiskus.flyingfox.com>
In-Reply-To: <19980814000605.A25012@astro.psu.edu>

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Matthew Hunt <mph@pobox.com> writes:

> On Fri, Aug 14, 1998 at 10:10:02AM +0930, Ivan Brawley wrote:
> 
> > Question: What is wrong with using an unsigned long for time_t,
> > instead of long (which is then assumed signed).
> 
> man 3 time:
> 
>      Upon successful completion, time() returns the value of time.
>      Otherwise a value of ((time_t) -1) is returned and the
>      global variable errno is set to indicate the error.

... which will cause an unsigned-long (32-bit) time counter to
fail precisely 1 second earlier than it would have otherwise,
some time in the early twenty second century.

Jim Shankland
Flying Fox Computer Systems, Inc.

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