can your wrapper just be something like this? i.e. does it really need to figure out the final directory during or can it wait until after? 
#!/bin/bash
out=/tmp/wrapper.$$
perl some_script.pl > $out 2>&1  # run your script, trapping everythin
+g
dest=`perl -x $0 $out` # examine logfile, figure out right place
mkdir -p ${dest%/*}    # make sure the directory exists
mv $out $dest          # move the log into place
exit
###############################
#!/usr/bin/perl
use strict;
use warnings;
my $filename = $ARGV[0];
my $output;
# read in $file, figure out where it should go; set $output
print $output;

[download]
(note that the perl code could also use File::Copy's move() as well; and also note that the bash script could check the exit code of the perl call;)

Update: Hmm.. re-reading OP, i see "some file on the shared disk that everything else is put into" .. So i guess the mv should be an append .. and i guess my main question gets re-phrased as "do you need to append as you go (interlacing w/other logs) or can it append as one big chunk at the end?

In reply to Re: Delayed-write object/module by davidrw
in thread Delayed-write object/module by Tanktalus

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