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From: jed@utah-cs.UUCP (Jed Krohnfeldt)
Newsgroups: net.lang.lisp
Subject: Re: Franz Lisp Process Help??? - (nf)
Message-ID: <1927@utah-cs.UUCP>
Date: Thu, 22-Sep-83 09:25:07 EDT
Article-I.D.: utah-cs.1927
Posted: Thu Sep 22 09:25:07 1983
Date-Received: Fri, 23-Sep-83 21:54:10 EDT
References: ecn-ec.1140
Lines: 29

I typically use process in the following way:

   (process command from-pipe to-pipe)

   where command   is the unix command to be executed
         from-pipe is a franz port opened for writing to the command
	 to-pipe   is a franz port opened for reading from the command

The two ports, from and to, are opened by process and can subsequently be
used to write to and read from the command.  So (patom "foo" from-pipe) will
write the string "foo" to the command, and (ratom to-pipe) will read the
next atom coming from command.

If the command needs to be executed with arguments, simply escape the space
between the command and its arguments:

   (process ls\ -aslF)

For a simple example, try writing a C program that does nothing but loop
endlessly, reading a string and writing that string back out again.  Then
use process to set up a from and to port to that program.  Now, write
to the program using (patom "something" from) followed by a read from the
program with (ratom to).  What you get back should be identical to what 
you gave it.

					Jed Krohnfeldt

				     ..!harpo!utah-cs!jed
				       krohnfeldt@utah-20