On Fri, 16 Feb 2007, Frank M. Ramaekers wrote: > Sure I understand that, but If I wanted it to be within 15 > seconds response, I'd have to check 4times x 60 seconds x 60 > minutes x 24 hours per day. Kind of a waste for a file that > may or may not be transmitted each day. push v pull, poll v select -- SGI formerly had 'fam' and the fam daemon to make this more economical, and we shipped it in centos-2 http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=bks&fname=/SGI_Developer/books/IIDsktp_IG/sgi_html/ch08.html and http://oss.sgi.com/projects/fam/ -------------------- If one wanted to enqueue events without polling, use a tail -f on the xferlog, and | grep the desired events, feeding those to an enqueuer, or just fire off a child as each new item is completed -- Such a script can live in the /etc/inittab quite happily, and Linux will handle the scheduling for you. -- Russ Herrold