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Message-Id: <200801211526.m0LFQhnn069707@www.freebsd.org>
Date: Mon, 21 Jan 2008 15:26:43 GMT
From: "Dmitrij N.Babin" <was.drum@gmail.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Incorrect mktime() work
X-Send-Pr-Version: www-3.1
X-GNATS-Notify:

>Number:         119862
>Category:       bin
>Synopsis:       Incorrect mktime() work
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 21 15:30:07 UTC 2008
>Closed-Date:    Mon Jan 21 20:41:11 UTC 2008
>Last-Modified:  Mon Jan 21 20:41:11 UTC 2008
>Originator:     Dmitrij N.Babin
>Release:        6.2, 4.11
>Organization:
online.ua
>Environment:
FreeBSD drummy 6.2-RELEASE-p7 FreeBSD 6.2-RELEASE-p7 #3: Fri Sep 28 18:27:53 EEST 2007     root@drummy:/usr/obj/usr/src/sys/DRUMMY  amd64

FreeBSD hz.albur-online.com 4.11-RELEASE FreeBSD 4.11-RELEASE #0: Fri Jan 21 17:21:22 GMT 2005     root@perseus.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386

>Description:
#include <stdio.h>
#include <time.h>


struct tm tf,tt,tt2;


main() {
        time_t t_f, t_t, t_t2;
        int days, days2;
        /*---*/
        tf.tm_sec=tt.tm_sec=tt2.tm_sec=0;
        tf.tm_min=tt.tm_min=tt2.tm_min=0;
        tf.tm_hour=tt.tm_hour=tt2.tm_hour=0;
        /*---*/
        tf.tm_year=tt.tm_year=tt2.tm_year=2008-1900; /* Year - 2008 */
        tf.tm_mon=2;                                 /* February */
        tt.tm_mon=2;
        tt2.tm_mon=3;                      /* March */
        /*---*/
        tf.tm_mday=1;
        tt.tm_mday=29;
        tt2.tm_mday=1;
        /*---*/
        t_f=mktime(&tf);
        t_t=mktime(&tt);
        t_t2=mktime(&tt2);
        days=(t_t-t_f)/86400+1;
        days2=(t_t2-t_f)/86400+1;
        printf("\nFrom 1-02 to 29-02 full days:%u\nFrom 1-02 to 1-03 full days:%u\n",days,days2);

}




drum@drummy> cc ttt3.c
drum@drummy> ./a.out

From 1-02 to 29-02 full days:29
From 1-02 to 1-03 full days:32

>How-To-Repeat:
just compile and run
>Fix:
dont know

>Release-Note:
>Audit-Trail:

From: Valentin Nechayev <netch@lucky.net>
To: "Dmitrij N.Babin" <was.drum@gmail.com>
Cc: freebsd-gnats-submit@freebsd.org
Subject: Re: bin/119862: Incorrect mktime() work
Date: Mon, 21 Jan 2008 19:22:24 +0200

  Mon, Jan 21, 2008 at 15:26:43, was.drum wrote about "bin/119862: Incorrect mktime() work": 
 
 >         tf.tm_mon=2;                                 /* February */
 
 Pilot error: tm_mon=2 means March, not February.
 Please read manuals carefully:)) (Yes, this API is confusing)
 
 P.S.
 
 const char *month_names[] = { "Nullember", "January", "February", "March",... }
 
 
 -netch-
State-Changed-From-To: open->closed 
State-Changed-By: linimon 
State-Changed-When: Mon Jan 21 20:40:56 UTC 2008 
State-Changed-Why:  
Apparently this is as designed. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=119862 
>Unformatted:
