Is it possible to use enviornemnt variables on the shebang line?

[jimlocigno]

This may wind up being a long a question but let me try

1) Our shop currently has a mixed architecture 32-bit and 64-bit.
2) We use perl quite a bit. Because of the mixed architecture we have two perl installations (32-bit and 64-bit).
3) Currently all of perl scripts are shebanged with an older version of perl.
4) We want all our programmers to go over the 32-bit or 64-bit version of perl (and yes the path location has changed and MAY change again in a year or two).
5) Our analysts our "complaning" at changing the shebang line in a hard coded version. They are afraid the the perl locations may change again - this is actually possible -and somewhat out of our control.
6) What I would like is: I can determine the proper version of perl to use in the .profile. For clarity let's just say

PERLPATH=/perl58532/perl  or PERLPATH=/perl58564/perl

. What I would like the analyst to be able to do is put

#!$PERLPATH

as they shebang line. However, from what we have been able to tell this is not possible.
7) Is there any trick I can use to make the shebang line evaluate the environment variables.
8) Also to anticipate some questions:
- I know we could have a wrapper for a given perl script. However for various reasons this not a reasonable solution for us (suffice it to say we already have a wrapper scipt calling a wrapper script calling an (any script) ). The other reason is due to our scheudling software.
Also, I don't believe that making symoblics to perl would work. We have 160 nodes and the adminsistrators don't want to deal with that. In addition I don't belive that the solves the solution of using either the 585-32perl or 585-64perl.

Thanks.

I hope there is somekind of trick to use here but I think I have all ready exhausted all possibilties. Just thougth I would ask to be sure.

 

[LKBrwnDBA]

1) Create a link to perl under /usr/bin on all servers (for example:

cd /usr/bin
ln -s /perl58564/perl perl

2) Set the shebang line to this link:

#!/usr/bin/perl

And the scripts will be independent of the perl environment.





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