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From: wrp@PRC.Unisys.COM (William R. Pringle)
Newsgroups: comp.unix.shell
Subject: Re: I/O Redirection question
Keywords: redirection, stdout, stderr
Message-ID: <17222@burdvax.PRC.Unisys.COM>
Date: 14 Apr 91 03:16:26 GMT
References: <1991Apr11.144844.28800@riacs.edu>
Organization: Unisys Corporation, Paoli Research Center; Paoli, PA
Lines: 26

In article <1991Apr11.144844.28800@riacs.edu> dwsmith@loki.arc.NASA.GOV (David Smith) writes:
>
>I have a question regarding I/O redirection.  I have a program in which
>writes to stdout and stderr.  I have redirected both of these to a file.
>
>Now comes the problem.  I need to capture stdout in a file along with
>stderr, but I also need stdout to go to the terminal for prompting of
>input.  Is this possible?  If so, how does one do this?

You can always write to the terminal with:

	echo "prompt message" > /dev/tty

In sh (or ksh), you can redirect stderr into stdout by:

	echo "message" 2>&1		# send stderr to stdout
	echo "message" 1>&2		# send stdout to stderr

You can have everything go to both the terminal and a file by:

	( whatever shell commands you want 2>&1) | tee file_name

Hope this helps!

Bill Pringle
prc.unisys.com