You don't need to do a readdir first. You can leave that up to perl, by using:

while( $file = <$id.'*'> ){
  do_something( $file );
}
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The <> takes care of the filename expansion.

Hope this helps,

Jeroen
"We are not alone"(FZ)

Update:You can read about it in glob and perlop2. The latter makes me realize that you'll be better of with

while( $file = glob "$id*" ){
  do_something( $file );
}
[download]