Date: Sun, 24 Sep 2000 11:51:01 +0100 From: Mark Ovens <marko@freebsd.org> To: Joao Carlos Mendes Luis <jonny@jonny.eng.br> Cc: questions@freebsd.org Subject: Re: mktime(3) Y2K bug? Message-ID: <20000924115101.A252@parish> In-Reply-To: <39CD8FD9.F2B7419@jonny.eng.br>; from jonny@jonny.eng.br on Sun, Sep 24, 2000 at 02:23:37AM -0300 References: <39CD8FD9.F2B7419@jonny.eng.br>
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On Sun, Sep 24, 2000 at 02:23:37AM -0300, Joao Carlos Mendes Luis wrote:
> Hi,
>
> Try the following piece of code:
>
> #include <time.h>
>
> main()
> {
> struct tm tm;
> time_t t;
>
> bzero( &tm, sizeof tm );
> tm.tm_sec = 0;
> tm.tm_min = 1;
> tm.tm_hour = 0;
> tm.tm_mday = 1;
> tm.tm_mon = 9;
> tm.tm_year = 100;
> tm.tm_isdst = -1;
>
> t = mktime( &tm );
> printf( "t = %ld\n", t );
> printf( "%s", ctime( &t ) );
> }
>
>
> My results:
>
> FreeBSD:
>
> t = -1
> Wed Dec 31 20:59:59 1969
>
Hmm, what version of FreeBSD? It works OK for me on 4.1-STABLE:
/usr/marko{52}% cat > foo.c
#include <time.h>
main()
{
struct tm tm;
time_t t;
bzero( &tm, sizeof tm );
tm.tm_sec = 0;
tm.tm_min = 1;
tm.tm_hour = 0;
tm.tm_mday = 1;
tm.tm_mon = 9;
tm.tm_year = 100;
tm.tm_isdst = -1;
t = mktime( &tm );
printf( "t = %ld\n", t );
printf( "%s", ctime( &t ) );
}
/usr/marko{53}% cc -o foo foo.c
/usr/marko{54}% ./foo
t = 970354860
Sun Oct 1 00:01:00 2000
/usr/marko{55}%
> Solaris:
>
> t = 970369260
> Sun Oct 1 00:01:00 2000
>
> Linux:
>
> t = -1
> Wed Dec 31 20:59:59 1969
>
> If I change tm_year to 99, everything is ok.
>
> Is this a bug, or just something stupid I can´t see at 2am without
> enough coffe?
>
> I found this executing at(1) as "at 10/01/00", if that matters.
>
> TIA,
>
> Jonny
>
> --
> João Carlos Mendes Luís jonny@embratel.net.br
> Networking Engineer jonny@jonny.eng.br
> Internet via Embratel jcml@ieee.org
>
>
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