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Top Forums Shell Programming and Scripting how to reuse a shell script to change env from perl Post 302296679 by phil518 on Wednesday 11th of March 2009 03:34:14 PM
Old 03-11-2009
Quote:
Originally Posted by jim mcnamara
I do not know for sure, but I think you have design problem. It appears you ported shell script to perl. If you started with n scripts, and it was a good working design, then you should have n perl scripts as well.

If your perl is well-written, it should be using the same ENV variables names each time it runs, probably against different file sets or databases.

A standard trick in designing something like this is to use shell script "include" files.
So you will now have to extract the ENV definitions from n shell files into small ENV only definition scripts.

Then do something like this - assume we have six files names env1 env2 ... env6
Code:
#!/bin /ksh
set -A envs env1 env2 env3 env4 env5 env6
i=1
while [[ $i - lt 7 ]]
do
   . ${envs[i]}
   # perl code call goes here
done

I do not know of a way to source a file in perl. Sourcing means that shell runs in the current process context some script. perl and shell are NOT the same language, so you would have to parse a shhell script file for variables, then call putenv for each variable.

You will have to add a subroutine to your perl code to do this, call the sub for each external file to need to "source" then run the rest of the perl code. UNless you have hundreds of external scripts, this may not be worth the effort.


[/code]
Hi Jim:

Thanks again for your help.

I am attempting to automate some of our currently manual tasks. We do not have "real" script yet, other than those shell scripts to set ENVs.

Well, I may have to extract them into perl and start from there.

Thanks!
 

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INN::Config(3pm)					    InterNetNews Documentation						  INN::Config(3pm)

NAME
Config.pm - Export all the variables an INN Perl script might need DESCRIPTION
This Perl module sets up any and all the variables that an INN Perl script might need. More particularly, it allows to use inn.conf variables: they are all provided by innconfval, as well as the version of INN (in the variable $INN::Config::version). Other useful variables are also provided (directories, files, programs, masks, parameters) and you should have a look at the source code of the module to see what you can use in your Perl scripts. You only have to declare the module at the beginning of them: use lib '<pathnews>/lib/perl'; use INN::Config; Then, you can for instance use: print $INN::Config::localmaxartsize; to print the value of localmaxartsize as it is set in inn.conf. You can also specify a version when you import the module. If you write: use INN::Config 2.5.0; only versions of INN superior to 2.5.0 will be able to run the Perl script. It is also possible to import the variables directly in your namespace if you specify what you want to import: use INN::Config qw($localmaxartsize $pathbin); Note that a legacy innshellvars.pl is also provided in pathnews/lib for compatibility reasons with old Perl scripts not shipped with INN. It was used by versions of INN anterior to 2.5.0. The corresponding scripts for Shell and Tcl are, however, still in use: innshellvars and innshellvars.tcl. They offer the same capabilities as this module. HISTORY
innshellvars.pl was written by James Brister <brister@vix.com> for InterNetNews in 1996. It was converted to the INN::Config Perl module by Julien Elie in 2007. $Id: Config.pm.in 8357 2009-02-27 17:56:00Z iulius $ SEE ALSO
inn.conf(5), innconfval(1), perl(1). INN 2.5.2 2009-05-21 INN::Config(3pm)
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