Shell scripts waiting for foreground

[Ken Turkowski]

I would like to write a shell script that dumps its standard input to a
file, then cats the file when the end-of-input has been found.  It will
do this as long as the program is running in the foreground.  If in the
background, it will print out a short message, then wait to come to the
foreground before it prints the file.

Can this be done with either sh or csh?  Or do I need to write a C
program?  I am running 4.2bsd.
-- 

Ken Turkowski @ CADLINC, Menlo Park, CA
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