DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:subject:mime-version:content-type
	:content-transfer-encoding:date:from:in-reply-to:references
	:message-id; q=dns; s=default; b=e38AuhFzwdsM8D4p43BnWlkEfdw1Ydl
	bgHhBd+dAo93LilAMPiyDL6elAVNgeybxc97Ep9iPw4LNSsqDNsKaDn6Em0RVOUT
	9x2/V/iI7r4IQ4QQtc/Qm8Xvn6Vbi8v8iwbp9Q0tnFPNT26vKLjspyU4SIvTZXvp
	kJD+oPhv9jHU=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
Subject: Re: Cygwin strptime() is missing "%s" which strftime() has
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Date: Mon, 24 Jul 2017 13:22:43 -0700
From: Kaz Kylheku <920-082-4242 AT kylheku DOT com>
In-Reply-To: <BY1PR09MB0343663DE41D927E67CF0CCEA5BB0@BY1PR09MB0343.namprd09.prod.outlook.com>
References: <BY1PR09MB0343663DE41D927E67CF0CCEA5BB0 AT BY1PR09MB0343 DOT namprd09 DOT prod DOT outlook DOT com>
Message-ID: <35cc661bda95310f57e9844bebf27158@mail.kylheku.com>
User-Agent: Roundcube Webmail/0.9.2
Content-Transfer-Encoding: 8bit

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.


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple