Checking for existence of a remote file in gradsdods

[Jean Pierre Arabonis]

    I use wget on a linux box to get the directory listings then use a
perl script to look for the most recent files which I then pipe into
shell scripts that invoke grads, its ugly and inelegant but it works
mostly, note wget can get temperamental behind proxy servers so you may
want to use lftp or curl to retrieve the directory listings.
    Hope this helps
       Jean Pierre



Masters.Steve wrote:

> Is there any way withing gradsdods, to check for the existance of a
> file without doing an sdfopen?  I have constructed a script that
> creates a series of GFS ensemble plots from the NCEP NOMADS DODS
> sites.  The different ensembles are in different files and the
> DODS references are posted over a span of many hours (and many hours
> after the regular ftp files are available from NCEP).  If I submit an
> sdfopen command against a file that does not yet exist, gradsdods does
> a hard abend.  I am using version 1.8SL10 on both Solaris and Windows.
>
> Steve Masters
> ENSCO, Inc.
> Melbourne, FL
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--
Jean Pierre Arabonis
arabonis at egs.uct.ac.za
Tel 021 780 1021 cell 084 401 1365
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