PERL Miscellaneous - activestate perl via shell() on XP, module location problem

Author

activestate perl via shell() on XP, module location problem

doolittle

2006-10-30, 7:10 pm

Hi,

I have a perl program - mymodscript.pl - which works from the command
line on XP, but when i try to run it from visual basic with the
shell("perl mymodscript.pl") command, it complains that it can't find
mymodule.pm.

mymodule.pm is one that i have written (and which mymodscript.pl
needs), and put in the same directory as mymodscript.pl.

I know that the shell command works because if i change mymodscript.pl
so that it doesn't need mymodule.pm, it works both from the command
line and from visual basic using shell("perl myscript.pl")

I have tried using perl -I path-to-my-modules, but that didn't work.

Does anyone have an explanation?

thanks

Sisyphus

2006-10-30, 7:10 pm

"doolittle" <spam.meplease@ntlworld.com> wrote in message
..
..
>
> mymodule.pm is one that i have written (and which mymodscript.pl
> needs), and put in the same directory as mymodscript.pl.
>

There's a bit of a trap there. The fact that 'mymodule.pm' is in the same
directory as 'mymodscript.pl' doesn't really count for much.
What *is* important is that 'mymodule.pm' is in @INC.

On Win32, that will *typically* (but not necessarily) mean that
'mymodule.pm' has to be in either 'C:\perl\lib', 'C:\perl\site\lib' or the
cwd (current working directory).

To check all of this, your 'mymodscript.pl' could (untested):

use Cwd;
print getcwd, "\n";
for(@INC) { print "$_\n" unless $_ eq '.'}

If 'mymodule.pm' is not located in *any* of the specified locations, then
that's your problem.

Cheers,
Rob

doolittle

2006-10-30, 7:10 pm

Thanks for the suggestion, i think i understand (a bit of) whats going
on:

The shell("mymodscript.pl") command runs in

C:/Documents and Settings/ibm/My Documents

this 'works' somehow although mymodscript.pl isn't in this directory,
its in

C:/Documents and Settings/ibm/My Documents/perl

which is where the modules are, which is why perl can't find them.

So i could put the module in C:/Perl/site/lib, or alter @INC to include

C:/Documents and Settings/ibm/My Documents/perl

Brian Helterline

2006-10-30, 7:10 pm

doolittle wrote:
> Thanks for the suggestion, i think i understand (a bit of) whats going
> on:
>
> The shell("mymodscript.pl") command runs in
>
> C:/Documents and Settings/ibm/My Documents
>
> this 'works' somehow although mymodscript.pl isn't in this directory,
> its in
>
> C:/Documents and Settings/ibm/My Documents/perl
>
> which is where the modules are, which is why perl can't find them.
>
> So i could put the module in C:/Perl/site/lib, or alter @INC to include
>
> C:/Documents and Settings/ibm/My Documents/perl
>

Another method to use for modules you don't have in @INC is:

# yoursript.pl
use FindBin;
use lib $FindBin::Bin; # adds location of script to @INC
use yourmodule;

This method requires yourmodule.pm be in the same directory as
yourscript.pl

--
brian

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