From: Ivan Shmakov <ivan@siamics.net>
To: 19302@debbugs.gnu.org
Subject: bug#19302: 24.4.51; `date-to-time' fails after 2038
Date: Tue, 09 Dec 2014 18:17:59 +0000 [thread overview]
Message-ID: <87h9x4k7qg.fsf@violet.siamics.net> (raw)
In-Reply-To: <83ppbswzfq.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 09 Dec 2014 18:38:49 +0200")
>>>>> Eli Zaretskii <eliz@gnu.org> writes:
>>>>> Date: Tue, 09 Dec 2014 06:01:26 -0500 From: Richard Stallman
>>> If I remember correctly, there are OS-es out there that have a
>>> 32-bit time_t?
>> Apparently so -- that is why I suggest making Emacs use 64 bits even
>> if the operating system uses 32 bits.
> What do you do with time_t fields of 'struct stat', 'struct timeval',
> and other structures used by library functions? They will still wrap
> around.
How would that affect a function whose purpose is not to pass
such a time value to some library call?
And when a value /is/ passed to the underlying platform, it can
be checked if it fits the target type, and the error signalled
if it doesn’t.
In the case of date-to-time, the likely culprit is encode-time,
which is (more or less) a wrapper around mktime (). Granted,
Emacs may use Gnulib’s mktime.c, but it doesn’t seem to provide
a 64-bit variant of mktime () suitable for systems with 32-bit
time_t, either.
Thus, the real question is: do we want some kind of time64_t
support in Gnulib, and if so, who’d volunteer to implement it?
--
FSF associate member #7257 http://boycottsystemd.org/ … 3013 B6A0 230E 334A
next prev parent reply other threads:[~2014-12-09 18:17 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-08 1:58 bug#19302: 24.4.51; `date-to-time' fails after 2038 Gabriel
2014-12-08 3:59 ` Lars Magne Ingebrigtsen
2014-12-08 12:54 ` Gabriel
2014-12-08 20:59 ` Richard Stallman
2014-12-08 22:02 ` Lars Magne Ingebrigtsen
2014-12-09 11:01 ` Richard Stallman
2014-12-09 16:38 ` Eli Zaretskii
2014-12-09 18:17 ` Ivan Shmakov [this message]
2014-12-09 18:26 ` Eli Zaretskii
2014-12-09 18:31 ` Lars Magne Ingebrigtsen
2014-12-09 18:49 ` Eli Zaretskii
2014-12-09 19:01 ` Lars Magne Ingebrigtsen
2014-12-09 19:09 ` Eli Zaretskii
2014-12-10 0:41 ` Gabriel
2014-12-10 16:25 ` Eli Zaretskii
2014-12-11 0:31 ` bug#19302: [PATCH] " Gabriel
2014-12-11 9:25 ` Andreas Schwab
2014-12-09 20:52 ` Andreas Schwab
2014-12-09 19:07 ` Ivan Shmakov
2014-12-09 19:48 ` Eli Zaretskii
2014-12-10 16:18 ` Richard Stallman
2014-12-10 21:21 ` Gabriel
2014-12-11 19:49 ` Richard Stallman
2014-12-12 0:33 ` Gabriel
2014-12-10 16:18 ` Richard Stallman
2014-12-10 0:37 ` Stefan Monnier
2014-12-10 16:17 ` Richard Stallman
2014-12-10 19:59 ` Stefan Monnier
2014-12-11 19:49 ` Richard Stallman
2014-12-11 20:31 ` Stefan Monnier
2014-12-12 16:42 ` Richard Stallman
2019-11-02 0:11 ` Stefan Kangas
2020-02-29 18:17 ` Stefan Kangas
2020-02-29 20:06 ` Stefan Monnier
2020-03-01 1:30 ` Stefan Kangas
2020-03-01 3:56 ` Stefan Monnier
2020-03-02 10:43 ` Stefan Kangas
2020-03-09 0:10 ` Stefan Kangas
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