Dear all,
I'm developing a perl program in UNIX that I want to sometimes work on
data from the pipe, sometimes from the command line, and sometimes
both. For example, consider the hypothetical program "squareroot". I
would like to use it in the following three ways from the command prompt:
> squareroot 100 1000 25
> cat numbers.list | squareroot
> cat numbers.list | squareroot 25 144
I've had no problem with the second two examples, but the first waits
for input from the STDIN. How can I get my perl program to know that
I'm not piping in data from the STDIN?
Thanks,
Andrew McArthur
Josephine Bay Paul Center
Marine Biological Laboratory
7 MBL Street
Woods Hole, MA 02543-1015
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