From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?iso-8859-1?q?Andr=E9s_Rold=E1n?= <aroldan@fluidsignal.com>
Subject: Re: I'm really starting to dislike stdio
Date: Thu, 19 Jun 2003 07:56:09 -0500
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In-Reply-To: <004001c33635$21f3d3a0$e764a8c0@fesnel.noip.org> (John T.
 Williams's message of "Thu, 19 Jun 2003 03:33:16 -0400")
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To: "John T. Williams" <jtwilliams@vt.edu>
Cc: linux-c-programming <linux-c-programming@vger.kernel.org>

man 3 getpass

Cheers

"John T. Williams" <jtwilliams@vt.edu> writes:

> I really appricated the help with the progress bar.
>
> I have another problem
>
> I am trying to read in a password from the stdin, but I don't want it to
> display to the screen as the person types it in.
> I either like to mock su, and take input w/o any output, or output a *  for
> each typed character, and I cannot figure out how to get this to work
>
> I've tried
> _____________________
>
>         read(1, &tmpch, 1);
>
>         while(tmpch != '\n') {
>                 memset(prog, '*', stars);
>                 printf("\rPassword: %-20s ", prog );
>                 stars++;
>
>                 buff[loop] = tmpch;
>                 loop++;
>                 read(1, &tmpch, 1);
>         }
>         read(1, &tmpch, 1);
>
>         while(tmpch != '\n') {
>                 memset(prog, '*', stars);
>                 printf("\rPassword: %-20s ", prog );
>                 stars++;
>
>                 buff[loop] = tmpch;
>                 loop++;
>                 read(1, &tmpch, 1);
>         }
> --------------------------
>
> I've tried
>
> ____________________
>
>
> tmpch = getchar();
> while(tmpch != '\n') {
>     memset(prog, '*', stars)
>     printf("\rPassword: %-20s ", prog );
>     stars++;
>
>     buff[loop] = tmpch;
>     loop++;
>     tmpch = getchar();
> }
>
> and I tried getc from the curses library.
> The problem with all of these is that they only actually do the read part
> after I've hit the <enter> key.  I want it to process each character as it
> is typed.  Anyone who has any ideas or can tell me a better way to read
> characters w/o displaying it to the screen and I'd be greatful.
>
>
> -
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-- 
Andres Roldan <aroldan@fluidsignal.com>
http://people.fluidsignal.com/~aroldan
CSO, Fluidsignal Group