Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!rutgers!psuvax1!psuvm!barilvm!bimacs!kfir
From: kfir@bimacs.BITNET (Yuval Kfir)
Newsgroups: comp.lang.c
Subject: Re: How do you tell if stdin/stdout is a terminal?
Keywords: stdin/stdout, unix, C, redirected I/O
Message-ID: <2072@bimacs.BITNET>
Date: 5 Aug 90 18:20:29 GMT
References: <12210@hydra.gatech.EDU>
Reply-To: kfir@bimacs.biu.ac.il.UUCP (Yuval Kfir)
Organization: Bar-Ilan University, Israel.
Lines: 22

In article <12210@hydra.gatech.EDU> gg10@prism.gatech.EDU (GALLOWAY) writes:
(stuff deleted)
>It would also be nice, if the output of "foo" was no ASCII to display a message
>like "foo: output must not be terminal".  Again, so the novice user doesn't
>get blown away be several screenfulls of garbarge.  It seems most people like
>to figure out how an unknown program works by just typing its name and waiting
>for the old familar "usage: foo [ options ] arguments" line to pop up.

I seem to remember a function called isatty(stdin). I am not sure it is
standard. I hope this helps.

---------------------------------------------------------------------------
Yuval Kfir              kfir@bimacs.bitnet
                        kfir@bimacs.biu.ac.il

"If you can lead it to water and force it to drink then it isn't a horse."
--
---------------------------------------------------------------------------
Yuval Kfir              kfir@bimacs.bitnet
                        kfir@bimacs.biu.ac.il

"If you can lead it to water and force it to drink then it isn't a horse."