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Path: utzoo!mnetor!seismo!sundc!hadron!jsdy
From: jsdy@hadron.UUCP (Joseph S. D. Yao)
Newsgroups: net.lang.c,net.unix
Subject: Re: C I/O Question
Message-ID: <503@hadron.UUCP>
Date: Thu, 31-Jul-86 01:13:30 EDT
Article-I.D.: hadron.503
Posted: Thu Jul 31 01:13:30 1986
Date-Received: Thu, 31-Jul-86 23:46:54 EDT
References: <1222@inuxc.UUCP>
Reply-To: jsdy@hadron.UUCP (Joseph S. D. Yao)
Distribution: net
Organization: Hadron, Inc., Fairfax, VA
Lines: 17
Summary: Several ways
Xref: mnetor net.lang.c:5508 net.unix:5074

In article <1222@inuxc.UUCP> lar@inuxc.UUCP (L Reid) writes:
>Is there a way to input a character from stdin without requiring
>the user to terminate it with a <CR>.

Several ways.  All involve doing an stty() or an ioctl()
call (depending on which version of Unix you have, or which
you feel more comfortable with -- starting from scratch, use
ioctl() if you have it).
The simplest and most general is to go into 'raw' mode.  If
you are ceertain you'll never use a pre-V7 machine, 'cbreak'
mode might be better, depending on your intentions.
If you have System V, you can also set a minimum number of
chars before input returns, and/or a timeout.
-- 

	Joe Yao		hadron!jsdy@seismo.{CSS.GOV,ARPA,UUCP}
			jsdy@hadron.COM (not yet domainised)