>To: plank@cs.utk.edu
>Subject: standard input
>
>  The < symbol is used to redirect standard input.  How do you have
>actual standard input with cat?  You have to use - but to terminate,
>there's supposed to be an EOF. Then you can do something with the input
>with standard output, standard error, etc.  But, how do you get standard
>input?
>
>  This is what I tried.  I don't know how to get out of 
>standard input:
>          $ cat - form_letter > output
>Dear Sue,
>CTRL-D
>EOF
>exit
>^Z 
>Stopped
>UNIX>

Hmmmm -- that works for me from both the csh and the Bourne shell.
The CNTL-D must be done directly after a newline (i.e. you can't
type a space and then CNTL-D.

UNIX> sh
$ cat > f1
Hi, This is Jim
<CNTL-D>
$ cat f1
Hi, This is Jim
$ cat f1 > f2
$ cat f2
Hi, This is Jim
$ cat f1 - > f2
Is this working?
<CNTL-D>
$ cat f2
Hi, This is Jim
Is this working?
$ cat - f1 > f2
Is this working?
<CNTL-D>
$ cat f2
Is this working?
Hi, This is Jim
$ <CNTL-D>
UNIX> cat f1 - > f2
Hmmm
<CNTL-D>
UNIX> cat f2
Hi, This is Jim
Hmmm
UNIX>