Keyboard Input

Keyboard Input

[J.S.Souza]

I'm new to linux assembly although I have taken Assembly Programming in 
College (unfortunately DOS based).  How is it possible to read input from the 
keyboard until the user hits the 'enter' key?  Does using the read() syscall 
work?  Also, how about reading only ONE character from user and returning 
control back to the program?  Although I know C fairly well, I would rather 
use Assembly _only_  (if this is possible).

			J.S.Souza

Re: Keyboard Input

[Rudolf Marek]

hello,


I wrote it here last week I think but I cant find it so once again.

On Wed, 8 May 2002, J.S.Souza wrote:

> Date: Wed, 8 May 2002 06:30:00 -0700
> From: J.S.Souza <jssouza@pacbell.net>
> To: linux-assembly@vger.kernel.org
> Subject: Keyboard Input
> 
> I'm new to linux assembly although I have taken Assembly Programming in 
> College (unfortunately DOS based).  How is it possible to read input from the 
> keyboard until the user hits the 'enter' key?  Does using the read() syscall 
> work?  

yes via read syscall, file desc (handle) will be STDIN


Also, how about reading only ONE character from user and returning 
> control back to the program?  Although I know C fairly well, I would rather 
> use Assembly _only_  (if this is possible).

It depends on terminal settings, you have to set it via ioctl syscall
I think it is ICANON atribute.

see example in asmutils package (sh.asm - tty_init to be more specific)


Regards
		Rudolf

To konstantin: 

I should put Q&A about this in FAQ and about vm86 too.

Re: Keyboard Input

[h-peter recktenwald]

On Wed, 8 May 2002 06:30:00 -0700
"J.S.Souza" <jssouza@pacbell.net> wrote:

> I'm new to linux assembly although I have taken Assembly Programming in 
> College (unfortunately DOS based).  How is it possible to read input from the 
> keyboard until the user hits the 'enter' key?  Does using the read() syscall 
> work?  Also, how about reading only ONE character from user and returning 
> control back to the program?  Although I know C fairly well, I would rather 
> use Assembly _only_  (if this is possible).
> 
> 			J.S.Souza

=> http://home.snafu.de/phpr/initty.gz

regards,
	hp

-- 
Linux,Assembly,Forth: http://home.snafu.de/phpr/index-lx.shtml (en,de)
no abusive software patents http://petition.eurolinux.org/pr/pr17.html
-
To unsubscribe from this list: send the line "unsubscribe linux-assembly" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Keyboard Input

[J.S.Souza]

On Wednesday 08 May 2002 11:33 am, h-peter recktenwald wrote:
> On Wed, 8 May 2002 06:30:00 -0700
>
> "J.S.Souza" <jssouza@pacbell.net> wrote:
> > I'm new to linux assembly although I have taken Assembly Programming in
> > College (unfortunately DOS based).  How is it possible to read input from
> > the keyboard until the user hits the 'enter' key?  Does using the read()
> > syscall work?  Also, how about reading only ONE character from user and
> > returning control back to the program?  Although I know C fairly well, I
> > would rather use Assembly _only_  (if this is possible).
> >
> > 			J.S.Souza
>
> => http://home.snafu.de/phpr/initty.gz
>
> regards,
> 	hp
Not the easiest thing to do is it?
Why is it that something so seemingly simple has such a complex solution?

			regards,
			Jeff