Subject: bug#10182: closed (Re: bug#10182: Century bug in date utility?)

From: [email-masked] (GNU bug Tracking System)
Date: Thu, 01 Dec 2011 17:36:03 +0000

Your bug report

#10182: Century bug in date utility?

which was filed against the coreutils package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
10182: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10182
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Contact [email-masked] with problems

Subject: Re: bug#10182: Century bug in date utility?
From: Eric Blake <[email-masked]>
To: Krzysztof Kowalski <[email-masked]>
Cc: [email-masked]
Date: Thu, 01 Dec 2011 10:35:31 -0700
List-Id: <debbugs-submit.debbugs.gnu.org>

tag 10182 notabug
thanks

On 12/01/2011 08:34 AM, Krzysztof Kowalski wrote:
> Hello,
> 
> We have 2011,
> 
> HOWEVER:
> 
> korn% date +%C
> 20
> korn% date
> Thu Dec  1 16:26:30 CET 2011

Yep.  And this behavior is mandated by POSIX for strftime(), so it is
not a bug.

http://pubs.opengroup.org/onlinepubs/9699919799/functions/strftime.html

C
    Replaced by the year divided by 100 and truncated to an integer, as
a decimal number. [ tm_year]

That is, it is NOT the "century" in the vernacular (where years in the
range [2001,2100] are collectively called the 21st century), but the
first two digits of the year.  The idea is that you combine %C%y to form %Y.

> 
> For a test I changed system time to 1997 and date utility returned 20
> century as well :)

No, %C in 1997 returned 19.

-- 
Eric Blake   [email-masked]    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

Subject: Century bug in date utility?
From: Krzysztof Kowalski <[email-masked]>
To: [email-masked]
Date: Thu, 01 Dec 2011 16:34:09 +0100
List-Id: <debbugs-submit.debbugs.gnu.org>

Hello,

We have 2011,

HOWEVER:

korn% date +%C
20
korn% date
Thu Dec  1 16:26:30 CET 2011

apc%
apc% date +%C
20
apc%
apc% date
Thu Dec  1 16:26:51     2011

And many other call returns that we live in 20 century :)

For a test I changed system time to 1997 and date utility returned 20
century as well :)

-- 
best regards
  -- Kowalski Krzysztof