Date: Thu, 3 Oct 2002 11:40:05 -0700 (PDT) From: Garrett Wollman <wollman@lcs.mit.edu> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/43592 Message-ID: <200210031840.g93Ie5xW080384@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR bin/43592; it has been noted by GNATS.
From: Garrett Wollman <wollman@lcs.mit.edu>
To: freebsd-gnats-submit@freebsd.org
Cc:
Subject: Re: bin/43592
Date: Thu, 3 Oct 2002 14:37:13 -0400 (EDT)
For audit trail...
------- start of forwarded message (RFC 934 encapsulation) -------
Return-Path: <ben@dubuque365.com>
Received: from mintaka.lcs.mit.edu (mintaka.lcs.mit.edu [18.26.0.36])
by khavrinen.lcs.mit.edu (8.12.3/8.12.5) with ESMTP id g935GFgQ004390
(version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK)
for <wollman@khavrinen.lcs.mit.edu>; Thu, 3 Oct 2002 01:16:15 -0400 (EDT)
(envelope-from ben@dubuque365.com)
Received: from dubuque365.com (dubuque365.com [66.111.75.26])
by mintaka.lcs.mit.edu (8.12.5/8.12.5) with ESMTP id g935GCYg000252
for <wollman@lcs.mit.edu>; Thu, 3 Oct 2002 01:16:13 -0400 (EDT)
(envelope-from ben@dubuque365.com)
Received: from watchtower.office.parksmediagroup.com (12-219-104-246.client.mchsi.com [12.219.104.246])
by dubuque365.com (8.11.0/8.11.0) with ESMTP id g935GBP64670
for <wollman@lcs.mit.edu>; Thu, 3 Oct 2002 00:16:11 -0500 (CDT)
(envelope-from ben@dubuque365.com)
In-Reply-To: <200210021911.g92JB7cM000635@khavrinen.lcs.mit.edu>
References: <200210021650.g92GoQtZ047931@www.freebsd.org>
<200210021911.g92JB7cM000635@khavrinen.lcs.mit.edu>
Content-Type: multipart/mixed; boundary="=-2zhfcTpgZzOLhkYIAqaQ"
X-Mailer: Ximian Evolution 1.0.8
Message-Id: <1033622171.74394.13.camel@watchtower.office.parksmediagroup.com>
Mime-Version: 1.0
From: Ben Burke <ben@dubuque365.com>
To: Garrett Wollman <wollman@lcs.mit.edu>
Subject: Re: bin/43592: mktime rejects dates at the start of daylight
savings time
Date: 03 Oct 2002 00:16:10 -0500
- --=-2zhfcTpgZzOLhkYIAqaQ
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
My apologies, I was playing with the code before I sent it and I must
have sent the wrong one. Attached is a corrected (and slightly expanded)
version... along with it's output from my machine. I'm very new to
C/C++, so there there could be other mistakes. I originally discovered
the issue when trying to use PHP's mktime function on a FreeBSD box.
I compiled with:
g++ -Wall -o mktime_test mktime_test.cc
Thanks,
Ben
On Wed, 2002-10-02 at 14:11, Garrett Wollman wrote:
> <<On Wed, 2 Oct 2002 09:50:26 -0700 (PDT), Ben Burke <ben@dubuque365.com> said:
>
> > int main() {
> > struct tm date1;
> > date1.tm_sec = 0; /* seconds (0 - 60) */
> > date1.tm_min = 0; /* minutes (0 - 59) */
> > date1.tm_hour = 2; /* hours (0 - 23) */
> > date1.tm_mday = 4; /* day of month (1 - 31) */
> > date1.tm_mon = 3; /* month of year (0 - 11) */
> > date1.tm_year = 104; /* year - 1900 */
>
> > cout << mktime(&date1) << "\n";
>
> It might help if you initialized date1::tm_isdst before it is used.
>
> > /* An hour later */
> > struct tm date2;
> > date2.tm_sec = 0; /* seconds (0 - 60) */
> > date2.tm_min = 0; /* minutes (0 - 59) */
> > date2.tm_hour = 3; /* hours (0 - 23) */
> > date2.tm_mday = 4; /* day of month (1 - 31) */
> > date2.tm_mon = 3; /* month of year (0 - 11) */
> > date2.tm_year = 104; /* year - 1900 */
> > date1.tm_isdst = -1; /* year - 1900 */
>
> > cout << mktime(&date2) << "\n";
>
> Likewise date2::tm_isdst.
>
> In order to debug this problem (assuming that it is not simply the
> result of this error in your code), we will need to know the precise
> name of the timezone under which you are running the program.
>
> -GAWollman
>
- --=-2zhfcTpgZzOLhkYIAqaQ
Content-Disposition: attachment; filename=test_output.txt
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; name=test_output.txt; charset=ISO-8859-1
1081062000 - CST
- -1 - z=B8P=D5=01
1081065600 - CDT
- --=-2zhfcTpgZzOLhkYIAqaQ
Content-Disposition: attachment; filename=mktime_test.cc
Content-Transfer-Encoding: quoted-printable
Content-Type: text/x-c; name=mktime_test.cc; charset=ISO-8859-1
#include <iostream.h>
#include <time.h>
int main() {
/* Before DST */
struct tm date1;
date1.tm_sec =3D 0; /* seconds (0 - 60) */
date1.tm_min =3D 0; /* minutes (0 - 59) */
date1.tm_hour =3D 1; /* hours (0 - 23) */
date1.tm_mday =3D 4; /* day of month (1 - 31) */
date1.tm_mon =3D 3; /* month of year (0 - 11) */
date1.tm_year =3D 104; /* year - 1900 */
date1.tm_isdst =3D -1; /* is summer time in effect? */
cout << mktime(&date1) << " - ";
cout << date1.tm_zone << "\n";
/* Starting DST */
struct tm date2;
date2.tm_sec =3D 0;
date2.tm_min =3D 0;
date2.tm_hour =3D 2;
date2.tm_mday =3D 4;
date2.tm_mon =3D 3;
date2.tm_year =3D 104;
date2.tm_isdst =3D -1;
cout << mktime(&date2) << " - ";
cout << date2.tm_zone << "\n";
/* During DST */
struct tm date3;
date3.tm_sec =3D 0;
date3.tm_min =3D 0;
date3.tm_hour =3D 3;
date3.tm_mday =3D 4;
date3.tm_mon =3D 3;
date3.tm_year =3D 104;
date3.tm_isdst =3D -1;
cout << mktime(&date3) << " - ";
cout << date3.tm_zone << "\n";
}
- --=-2zhfcTpgZzOLhkYIAqaQ--
------- end -------
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200210031840.g93Ie5xW080384>