Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcvax!hp4nl!botter!star.cs.vu.nl!maart
From: maart@cs.vu.nl (Maarten Litmaath)
Newsgroups: comp.unix.questions
Subject: Re: How to tell if you're in a pipe...
Keywords: pipe tty(1) sh(1) isatty(4)
Message-ID: <2825@solo3.cs.vu.nl>
Date: 3 Jul 89 19:48:57 GMT
References: <1798@lgnp1.LS.COM>
Organization: V.U. Informatica, Amsterdam, the Netherlands
Lines: 22

rbarrell@lgnp1.LS.COM (Robert Barrell) writes:
\
\     if [ `tty -s;echo $?` = 0 ]
\     then
\         echo "terminal"
\     else
\         echo "pipe"
\     fi

What an `interesting' way to accomplish the following:

	if tty -s
	then
		echo terminal
	else
		echo pipe
	fi
or even
	tty -s && echo terminal || echo pipe
-- 
"I HATE arbitrary limits, especially when |Maarten Litmaath @ VU Amsterdam:
   they're small."  (Stephen Savitzky)    |maart@cs.vu.nl, mcvax!botter!maart