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Re: Using IDL from a perl script [message #56424 is a reply to message #56418]

Fri, 19 October 2007 11:37

A. Sinan Unur
Messages: 1
Registered: October 2007

Junior Member

James Everton <james.everton@gmail.com> wrote in
news:1192816961.304312.109840@q3g2000prf.googlegroups.com:

> I'm developing some web scripts in perl that interact with a database
> through various pre-written IDL procedures here at my work. The
> problem I'm having is getting arguments passed between the two.
> Passing from the perl into the IDL code is easy enough because I'm
> using the open( ) procedure and simply writing the strings as a block:
>
> open(IDL, "|/usr/local/bin/idl -32");
> print IDL <<"ENDIDL";
> var1 = '$myPerlVar1'
> var2 = '$myPerlVar2'
> .compile my_web_script
> my_web_script, var1, var2
> ENDIDL

Instead of typing the code yourself, you are having perl type the code.
This is not what I understand from "passing arguments".

> I'm wondering if there is any way to pass from this IDL block (say for
> instance that the my_web_script procedure was actually a function and
> was assigned to a new variable returnVar) out to the containing perl
> script.

There is a serious disconnect in your thinking here. You just opened a
write-only pipe to the /usr/local/bin/idl process. Even if you could
pass some return values (by having the IDL script throw an error), it
would be cumbersome.

Maybe perldoc perlipc can help but you need to improve your
understanding of how interprocess communications work. Why are you
writing the script above? Why wouldn't you just type your IDL program in
an editor rather than generating these scripts using Perl?

Sinan

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A. Sinan Unur <1usa@llenroc.ude.invalid>
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[Message index]

		Re: Using IDL from a perl script By: James Everton on Mon, 22 October 2007 13:05
		Re: Using IDL from a perl script By: jkj on Sat, 20 October 2007 16:16
		Re: Using IDL from a perl script By: A. Sinan Unur on Fri, 19 October 2007 11:37
		Re: Using IDL from a perl script By: Michele Dondi on Fri, 19 October 2007 11:33

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