countmail — be obnoxious about how much mail you have
program counts your mail and tells you about it rather obnoxiously.
program first appeared in
Nx 1.3 .
was first written by
An Noah Friedman Aq firstname.lastname@example.org
This version was written by Charles M. Hannum
Aq mycroft@NetBSD.org .
The read loop is horrendously slow on every shell implementation tried.
instead, though these are not shell builtins.