I've used something like:
my $pid;

$SIG{CHLD} = sub { wait };

if ($pid = fork()) {

    # Master
    print "Process was started in background."    
    return;

} else {

    # Child 
    exec "my_program";

}

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In reply to Re: system or exec in a web environment by rbi
in thread system or exec in a web environment by Perimus

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