ckatz at cfa
Mar 26, 2012, 12:25 PM
Views: 691
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Re: difference between PerlSetEnv and <Perl>$ENV{}=</Perl> ?
[In reply to]
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I have also tried using SetEnv from mod_env, and neither the Perl nor the
PGPLOT library can see the environment variable set that way.
On Mon, Mar 26, 2012 at 2:54 PM, Randolf Richardson <randolf [at] modperl>wrote:
> > Hi,
> >
> > My web app uses the PGPLOT module to access PGPLOT, which is a scientific
> > plotting library commonly used in my field. It is a Fortran library,
> with
> > a C wrapper around it, which is then wrapped in Perl. This works fine in
> > my test scripts, producing the desired graphics.
> >
> > The library requires that the environment variable PGPLOT_DIR be set so
> it
> > can find some required files. Running from the command line, I just set
> > this in the shell, and PGPLOT works fine. Running in Apache, I see
> > different behavior:
> >
> > When I set this in httpd.conf:
> > PerlSetEnv PGPLOT_DIR /my/pgplot/directory
> > my Perl programs can see the value in $ENV{PGPLOT_DIR}, but the PGPLOT
> > library can't, and my code fails.
> >
> > When I set this in httpd.conf:
> > <Perl>
> > $ENV{PGPLOT_DIR} = q[/my/pgplot/directory];
> > </Perl>
> > my Perl programs can't see the value in $ENV, but the PGPLOT library can,
> > and my code works.
> >
> >
> > Can someone help me understand what the difference is between these two
> > cases?
> >
> > Is the situation muddled because the PGPLOT library is a
> > Perl-wrapped-C-wrapped-Fortran library? I'm not sure how the environment
> > passing is supposed to work.
>
> Try this module:
>
> http://httpd.apache.org/docs/current/mod/mod_env.html
>
> Randolf Richardson - randolf [at] inter-corporate
> Inter-Corporate Computer & Network Services, Inc.
> Beautiful British Columbia, Canada
> http://www.inter-corporate.com/
>
>
>
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