[sf-perl] Setting LD_LIBRARY_PATH

Loo, Peter # PHX Peter.Loo at source.wolterskluwer.com
Fri Jul 6 10:15:18 PDT 2007

Thanks everyone for your inputs. 

My director has convinced the admins to add to the .profile.  I thought
of the idea of having a shell wrapper setting the environment before
spawning off the Perl program, however, the Perl program itself is a
wrapper that performs many different tasks according to a list of
parameters that I dynamically pass to it.  At any rate, the issue is
resolved with the entries into the .profile.

I do have one question though.  If I was to have a Perl program that
sets $ENV{LD_LIBRARY_PATH} = 'some value'; then spawning of another Perl
program from within it using system(), will the spawned Perl program
inherit the set environment variable?


-----Original Message-----
From: sanfrancisco-pm-bounces+peter.loo=source.wolterskluwer.com at pm.org
[mailto:sanfrancisco-pm-bounces+peter.loo=source.wolterskluwer.com at pm.or
g] On Behalf Of Quinn Weaver
Sent: Friday, July 06, 2007 9:58 AM
To: San Francisco Perl Mongers User Group
Subject: Re: [sf-perl] Setting LD_LIBRARY_PATH

On Thu, Jul 05, 2007 at 03:33:59PM -0700, Loo, Peter # PHX wrote:
> Hello All,
> Unix admins here are not happy about updating the .profile of the 
> production account to add two additional entries to LD_LIBRARY_PATH 
> environment variable.  So I am having to figure out an alternative 
> solution in setting this environment dynamically during program run.

Hi, Peter,

I think your Unix admins are being unreasonable--this sounds like a
global setting for all Perl programs, which is exactly the kind of thing
that should go in .profile.

However, if you can't get them to cooperate, I think David Alban has the
right tack:  write a wrapper.  If you so something like this, you can
reuse the same wrapper for multiple programs:


    export LD_LIBRARY_PATH
    exec $@

Call that perlwrap.  Then you can do

    /path/to/perlwrap /path/to/my_perl_program.pl [perl_prog_arguments]

For any Perl program you like.


Quinn Weaver, independent contractor  |  President, San Francisco Perl
http://fairpath.com/quinn/resume/     |  http://sf.pm.org/
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