What does this do?
Well, since no expert answered, the newbie will :-) Then the experts
can tell us what I got wrong :-) :-)
cat with no filename uses stdin as the input "file"--in this case, the
incoming message. =| puts the output of that (again the whole
message) as a new string value for the environment variable TEMP. In
Korn shell, this would be 'TEMP="$(cat)" So later, I can say 'echo
$TEMP' to output the message to something else.
**HOWEVER**, please note that other(s) have posted a better way to get
the job done.