You can only fake such a change, which is one of the reasons why people seldom ever bother to do that. The usual (and IMO sensible) way to handle this type of situation is to write a simple wrapper in your favorite language around the applications which correctly specifies the environment that they need in order to run properly.

In reply to Re: Modifying ENV variable of parent process by virtualsue
in thread Modifying ENV variable of parent process by Tuna

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