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Never mind. Problem solved!
My read function didn't wait for EOF so it didn't get the entire buffer. The solution was instead of doing one read to do:

while((rch = read(pipor[0], buff,...

If your c file is myfile.c, then

gcc -o myfile myfile.c

will produce an executable file called 'myfile'

I have encountered a strange problem dealing with pipes
and forking. The program basicaly does this:

cat file | tbl | eqn | groff

Now, I have a parent process that forks children
that that...