From: Kaz Kylheku <920-082-4242@kylheku.com>
To: cygwin@cygwin.com
Subject: Re: Cygwin strptime() is missing "%s" which strftime() has
Date: Mon, 24 Jul 2017 21:02:00 -0000 [thread overview]
Message-ID: <35cc661bda95310f57e9844bebf27158@mail.kylheku.com> (raw)
In-Reply-To: <BY1PR09MB0343663DE41D927E67CF0CCEA5BB0@BY1PR09MB0343.namprd09.prod.outlook.com>
On 23.07.2017 19:09, Lavrentiev, Anton (NIH/NLM/NCBI) [C] wrote:
>> But that's just scanning a decimal integer to time_t.
>
> It's not a question of whether I can or can't convert a string into an
> integer, rather it's a question about portability of code that uses %s
> for both functions and expects it to work unchanged in the Cygwin
> environment. Also, strptime() was designed to be a reversal to
> strftime() (from the man-pages: the strptime() function is the
> converse function to strftime(3)) so both are supposed to "understand"
> the same basic set of formats. Because of Cygwin's strptime() missing
> "%s", the following also does not work even from command line:
>
> $ date +"%s" | strptime "%s"
> strptime: cannot make sense of `1500861577' using the given input
> formats
There is no %s in POSIX. It is a GNU C library extension. Thus this is
only a matter of compatibility between Cygwin and GNU/Linux (and
portability
between those systems).
Linux compatibility *is* an explicit goal of the Cygwin project. If %s
works
on Linux but not Cygwin, in that moment you're not getting quite that
"Linux feeling" on Windows.
--
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next prev parent reply other threads:[~2017-07-24 20:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-24 9:21 Lavrentiev, Anton (NIH/NLM/NCBI) [C]
2017-07-24 10:53 ` Corinna Vinschen
2017-07-24 21:02 ` Kaz Kylheku [this message]
2017-07-24 21:28 ` Hans-Bernhard Bröker
2017-07-24 23:18 ` Brian Inglis
2017-07-24 23:31 ` Kaz Kylheku
2017-07-25 18:27 ` Brian Inglis
2017-08-30 0:25 ` Brian Inglis
-- strict thread matches above, loose matches on Subject: below --
2017-07-24 21:48 Lavrentiev, Anton (NIH/NLM/NCBI) [C]
2017-07-24 22:12 ` Eric Blake
2017-07-24 22:51 ` Brian Inglis
2017-07-24 19:51 Lavrentiev, Anton (NIH/NLM/NCBI) [C]
2017-07-24 13:54 Lavrentiev, Anton (NIH/NLM/NCBI) [C]
2017-07-24 17:02 ` Eric Blake
2017-07-23 11:38 Lavrentiev, Anton (NIH/NLM/NCBI) [C]
2017-07-23 21:18 ` Kaz Kylheku
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