tail -f

[Guy Harris]

>Right, he was probably referring to a non-blocking read which won't help
>since blocking is really what you want.

*Ahem* a non-blocking "read" on a regular file is no different from a
blocking "read" on the same file under most versions of UNIX.  Folks,
there really, truly, honestly *is* no special magic feature of e.g. 
4.xBSD that obviates the need for the "sleep and try again" stuff....