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From: "Philip Pemberton" <philpem AT bigfoot DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: password and masking
Date: Tue, 12 Mar 2002 22:12:32 -0000
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References: <a64q59$psf$1 AT iac5 DOT navix DOT net>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

"Amber N. Stange" <nicci AT eluviis DOT ohsu DOT edu> wrote in message
news:a64q59$psf$1 AT iac5 DOT navix DOT net...
> I am wanting to (for lack of a better word) mask a password for a login as
> the user types the password.  For instance much like Linux displays
nothing
> when a password is entered upon an attempted login.
>
> Well, in this specific case I am using fgets to get the password
information
> but of course that does me no good until enter has been pressed.  What I
was
> wanting to mask the password with was, "*"  (asterisks) much like many
other
> logins in other OSs and the old BBSs used to do.
>
> I have found thusfar that kbhit(); seems to be worthless for this.  I have
> thought about using a do { } while();   loop and testing with kbhit(); for
> every keypress then once a keypress has been detected (ie, if(kbhit()
!=0))
> set my pointer that points to fgets = to an enter copy the single char to
a
> string do a \b for a backspace and printf an asterisk and do it all over
> again and again until the user hits enter or some other method of ending
my
> do while loop.
>
> I dont know if this works or would work and I am trying to implement it..
> But I am wondering if I am going about this the wrong way..  If so is
there
> another way to do this?  If my method will work is there an easier way
that
> I am not thinking of minus setting up a ASM keyboard routine to get the
> actual keypress codes or scan codes rather..
What about getch() (C) or cin (C++)?
Just keep looping until getch/cin returns a carriage return (13 decimal). If
it returns a delete (9 decimal IIRC) then back up one character [
printf("%c", 9); ], print a space then back up again.

I used to do the same thing in Pascal.

Later.
--
Phil.
philpem AT bigfoot DOT com
http://www.philpem.btinternet.co.uk/