in reply to exec problem

I'm trying to pre-load the LD_LIBRARYN32_PATH via exec call (see below) and my script's just sitting there spinning its wheels.

The description of %ENV in perlvar (for 5.6.1) reads:

The hash %ENV contains your current environment. Setting a value in ENV changes the environment for any child processes you subsequently fork() off.
There's no mention of %ENV in the description of exec() perlfunc. It's been my experience that if you want to change the environment, you need to fork() first, then exec().

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Re: exec problem
by crenz (Priest) on Mar 14, 2003 at 00:31 UTC

    Executing

    perl -e '
$ENV{"FOO"} = "bar";
exec "env";
'

    sets the environment variable just fine for me on FreeBSD (as seen in env's output). No need to fork here.

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Re: Re: exec problem
by virtualsue (Vicar) on Mar 14, 2003 at 12:01 UTC
    It works with exec. I have some scripts which set ORACLE_HOME and LD_LIBRARY_PATH like so: 
    BEGIN {
   unless ($ENV{BEGIN_BLOCK}) {
      $ENV{ORACLE_HOME}  = "/oracle/product/current";
      $ENV{LD_LIBRARY_PATH} = "$ENV{ORACLE_HOME}/lib";
      $ENV{BEGIN_BLOCK} = 1;
      exec $^X, $0, @ARGV;
   }
}

    [download]
    This works fine. Careful readers will see that I don't exec env. It doesn't appear to be necessary.
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[d/l]
Re: exec problem
by tejnil (Novice) on Mar 13, 2003 at 23:58 UTC
[reply]

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