From: Siep Korteling <s.korteling@...>
Date: 2008-11-13T06:06:08+09:00
Subject: Re: Need tutoring on using a path environment variable

dkmd_nielsen wrote:
> I don't know what to do.  I have an environment variable, PW_PATH,
> that contains the folder names where applications can be executed
> from.  I want to start a particular application that is in one of
> those folders.  I currently use the following:
> 
>       system("presort /a /nos /watch #{template[0]}")  # submit the
> presort to run
> 
> This works when the contents of PW_PATH are added to the PATH
> variable.  But I would like to avoid that if I can.  I guess my
> questions are:  How do I first acquire the contents of PW_PATH?  How
> do employ the contents as a temporary addition to PATH so that system
> can submit the application and it will be found and executed?
> 
> Suggestions?  Comments?  Observations?  All are appreciated.
> 
> dvn

ENV contains all environment variables; ENV['PW_PATH'] is the content of 
PW_PATH. So this might be sufficient:

system("#{ENV['PW_PATH']/presort /a /nos /watch #{template[0]}")

hth,

Siep

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