Date: Sun, 24 Sep 2000 19:11:30 -0300 From: Joao Carlos Mendes Luis <jonny@jonny.eng.br> To: Mark Ovens <marko@freebsd.org> Cc: questions@freebsd.org Subject: Re: mktime(3) Y2K bug? Message-ID: <39CE7C12.59AE80C5@jonny.eng.br> References: <39CD8FD9.F2B7419@jonny.eng.br> <20000924115101.A252@parish>
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What could this mean?
krakatoa::root [629] ./a.out
t = -1
Wed Dec 31 20:59:59 1969
krakatoa::root [630] TZ=EST3EDT ./a.out
t = 970365660
Sun Oct 1 00:01:00 2000
krakatoa::root [631]
Mark Ovens wrote:
>
> 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
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-questions" in the body of the message
>
> --
> 4.4 - The number of the Beastie
> ________________________________________________________________
> 51.44°N FreeBSD - The Power To Serve http://www.freebsd.org
> 2.057°W My Webpage http://ukug.uk.freebsd.org/~mark
> mailto:marko@freebsd.org http://www.radan.com
--
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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