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From: ok@goanna.cs.rmit.oz.au (Richard A. O'Keefe)
Newsgroups: comp.lang.c
Subject: Re: Making chars disappear
Message-ID: <4785@goanna.cs.rmit.oz.au>
Date: 19 Feb 91 02:52:32 GMT
References: <8531@castle.ed.ac.uk> <22233@hydra.gatech.EDU>
Distribution: comp
Organization: Comp Sci, RMIT, Melbourne, Australia
Lines: 21

In article <22233@hydra.gatech.EDU>, ccastdf@prism.gatech.EDU (Dave) writes:
> In article <8531@castle.ed.ac.uk> james@castle.ed.ac.uk (J Gillespie) writes:
> >Does anyone know of a way to prevent characters being echoed as they
> >are typed in?

> In unix, you need to set the mode to raw.  This can be done by invoking
> an ioctl command, or by isuing an stty system call.

(a) This is a system-specific question, and should be asked in an
    appropriate system-specific newsgroup.
(b) Check "getpass" in section 3 of the UNIX manual
(c) The claim that you have to go into "raw" mode in UNIX is *BOGUS*.
    It simply is not true.  It's ever so simple:
	system("stty -echo");	/* disables echoing */
	system("stty echo");	/* enables it again */
    other aspects, such as editing characters, are NOT affected by this.
    The *only* thing that is switched off is echoing.  (Do be careful
    to switch it back on even if you get a "drop dead" signal.)

-- 
Professional programming is paranoid programming