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Date: Fri, 23 Aug 2002 16:35:44 -0600 (MDT)
From: "J. Scott Edwards" <sedwards AT xmission DOT com>
To: cygwin AT cygwin DOT com
Subject: RE: Character at a time input (was Re: Where is less source?)
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Thanks that worked great!

I have another dumb question: is there a simple way to determine if the
stdin is from a terminal or is pipe'd in?

Thanks again
  -Scott


On Fri, 23 Aug 2002, Rick Hellicar (QMP) wrote:

> Don't know about ioctl, but termios will do it.  I've included a
> simple program that shows it working.
>
> If you're planning on detecting arrow keys, function keys, etc., then
> you have to remember that they produce an escape-sequence of several
> characters, which you'll have to detect and decode.
>
> Hope this helps,
>
> Rick
>
>
>
>
> #include <unistd.h>
> #include <stdio.h>
> #include <termios.h>
>
> int
> main (void)
> {
>   struct termios new_settings;
>   struct termios stored_settings;
>   char c;
>
>   /* record the old settings to restore the terminal when finished */
>   tcgetattr (0, &stored_settings);
>   new_settings = stored_settings;
>
>   /* set things up for character-at-a-time */
>   new_settings.c_lflag &= ~(ICANON | ECHO);
>   new_settings.c_cc[VTIME] = 0; /* don't think this is relevant if VMIN=1 */
>   new_settings.c_cc[VMIN] = 1;
>   tcsetattr (0, TCSANOW, &new_settings);
>
>   /* main loop - press q to exit */
>   do
>     {
>       c = getchar ();
>       printf ("%d\t%c\n", c, c);
>     }
>   while (c != 'q');
>
>   /* restore the old settings */
>   tcsetattr (0, TCSANOW, &stored_settings);
>   return 1;
> }
>
>
>
> > -----Original Message-----
> > From: J. Scott Edwards [mailto:sedwards AT xmission DOT com]
> > Sent: 22 August 2002 23:23
> > To: Gerrit @ cygwin
> >
> > Thanks, I found it.  But unfortunately it didn't answer my question:
> >
> > Can ioctl be used to change the standard input into character
> > at a time
> > mode or do I have to use ncurses or is there a better way to
> > just get a
> > character at a time?
>


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