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From: david@wubios.wustl.edu (David J. Camp)
Newsgroups: comp.unix.questions
Subject: isatty(stdin) usage
Keywords: isatty stdin terminal
Message-ID: <314@wubios.wustl.edu>
Date: 21 Feb 89 02:37:53 GMT
Organization: Washington University (St. Louis)
Lines: 15

I am trying to use this invokation:

          if (isatty (stdin))

to detect whether a C program has been called interactively or with
redirection.  It does not work.  Can anyone suggest a better way, or
explain why it does not work?

I am using a Sun 3/260 running SunOS 4.0.1.
-David-
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