Path: utzoo!utgpu!water!watmath!clyde!rutgers!mit-eddie!husc6!cmcl2!brl-adm!brl-smoke!gwyn
From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.lang.c
Subject: Re: no echo?
Message-ID: <7146@brl-smoke.ARPA>
Date: 21 Jan 88 15:31:38 GMT
References: <128@dcrbg1.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 15

In article <128@dcrbg1.UUCP> bcf2303@dcrbg1.UUCP (Wing Chow) writes:
>      can you tell me how to avoid 'echoing' back to the user what he/she
>is typing in?

The details of how to do this depend on the specific operating system
environment.  On UNIX, the simplest thing is
	system("stty -echo");
to disable echoing and
	system("stty echo");
to reenable it (important!).  For more direct control, you would have
to use an appropriate ioctl() call; see TTY(4) or TERMIO(7) in your UNIX
Programmer's Reference Manual (or Administrator Reference Manual) for
details of terminal-related ioctls.  The proposed IEEE Std 1003 specifies
some library functions to be used instead of ioctl() calls, but they are
probably not yet in your C library.