Re: 19991231: Y2K Bug Fix for pqact program of the LDM

Tom,

The instructions are correct.

Happy New Years,

Robb...



On Fri, 31 Dec 1999, Unidata Support wrote:

> 
> ------- Forwarded Message
> 
> >To: address@hidden
> >From: Tom Priddy <address@hidden>
> >Subject: Re: 19991230: Y2K Bug Fix for pqact program of the LDM
> >Organization: .
> >Keywords: 199912311527.IAA04266
> 
> From:  Tom Priddy
> 
> OK!  Several emails have passed back and forth concerning this Y2K bug
> on the LDM. Your instructions, listed below, are exactly what I need to do
> to fix this bug......correct? /ktp
> 
> Unidata Support wrote:
> 
> > Hi,
> >
> > A copy of this notice is available at
> >
> >   http://www.unidata.ucar.edu/packages/ldm/y2k-fix.html
> >
> > Thanks to Al Taylor of NOAA's Air Resources Laboratory for being the
> > first to report a Y2K bug in the pqact program of the LDM (all
> > versions). The symptom of the bug is that pqact.conf entries that make
> > use of two-digit year substitution patterns such as (\1:yy) will
> > substitute the string "10" instead of the string "00" for products
> > whose WMO header indicates a date in January or later.
> >
> > For example, the pqact.conf entry
> >
> > WMO     ^S[AP][AC-Z][A-Z].* .... ([0-3][0-9])
> >         FILE    data/obs/surface/hrly/(\1:yy)(\1:mm)\1.hrly
> >
> > when presented with a matching product with a date component of 010212
> > (representing 1200 on January 2) will append the product to a file
> > with a name such as "100212.hrly" instead of the expected
> > "000212.hrly".
> >
> > A fix for the bug is to change line 643 in the source file
> > ldm-5.0.8/src/pqact/palt.c from
> >
> >                 (void) sprintf(ostring,"%d",year);
> >
> > to
> >
> >                 (void) sprintf(ostring,"%02d", year % 100);
> >
> > and then rebuild pqact and reinstall it. An already-patched version of
> > the palt.c file is available from
> >
> >   ftp://ftp.unidata.ucar.edu/pub/ldm5/palt.c.
> >
> > To make it easier to install this bug fix, we have built new versions
> > of pqact for all the common platforms for which we make binary
> > distributions. You can just FTP the appropriate version of pqact for
> > your platform and install it in /usr/local/ldm/bin/pqact (or wherever
> > you have pqact installed). Below is a list of the available pqact
> > binaries. Versions built for an earlier version of a platform, for
> > example sunos_5.6-sparc, will generally work on later versions of the
> > same platform such as sunos_5.7-sparc.
> >
> >   ftp://ftp.unidata.ucar.edu/pub/binary/aix_4.3-rs6000/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/hpux_10.20-hp9000/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/hpux_11.00-hp9000/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/irix64_6.5-mips/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/irix_6.5-mips/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/linux_2.2.5-i686/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/osf1_4.0-alpha/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/sunos_5.6-sparc/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/sunos_5.7-i86pc/pqact
> >   ftp://ftp.unidata.ucar.edu/pub/binary/sunos_5.7-sparc/pqact
> >
> > If you have a platform for which none of these binaries is appropriate
> > or if you need pqact built with the GDBM option, you will have to
> > build a new version of pqact from source after making the one-line
> > change above. Here's how to do that:
> >
> > % cd ~ldm/runtime/src/pqact
> > % mv palt.c palt.sav
> >
> > Then copy the new palt.c to this directory.
> >
> > % make
> > % cp pqact ~ldm/bin
> >
> > We will be happy to assist with this and give top priority to any
> > questions about this sent to address@hidden.
> >
> > We're sorry for the inconvenience and the late notice on this bug, but
> > it slipped by our testing.
> >
> > ****************************************************************************
> > Unidata User Support                                    UCAR Unidata Program
> > (303)497-8644                                                  P.O. Box 3000
> > address@hidden                                   Boulder, CO 80307
> > ----------------------------------------------------------------------------
> > Unidata WWW Service                        http://www.unidata.ucar.edu/
> > ****************************************************************************
> 
> --
> ============================================================
> Tom Priddy                                address@hidden
> Extension Ag. Meteorologist          ph:  606-257-3000ext245
> Ag. Weather Center                  fax:  606-257-5671
> 243 Ag. Engineering Bldg
> Dept. of Biosystems and Ag. Engr.
> University of Kentucky
> Lexington, KY 40546-0276
> HOMEPAGE   http://wwwagwx.ca.uky.edu
> ============================================================
> 
> 
> 
> ------- End of Forwarded Message
> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================