related to getch()

culin · 01-04-2007, 06:22 AM

oh... but will any of the funcitons tcgetattr() tcsetattr() can echo a charecter on the screen by taking the input from the standard input device (keyboard)?? and what makes those functions getch() nocbreak() echo() worse ???
thanks....

tuxdev · 01-04-2007, 08:37 AM

He's saying don't use curses if you don't really need curses (with a little subtle warning about the kind of headaches you get with curses, I can't vouch for that part). Instead, put the terminal into raw mode like

Code:

   struct termios cur,raw;
   tcgetattr(STDIN_FILENO,&cur);
   raw=cur;
   raw.c_lflag&=~(ICANON|ECHO|ISIG);
   raw.c_cc[VMIN]=1;
   raw.c_cc[VTIME]=0;
   tcsetattr(STDIN_FILENO,TCSAFLUSH,&raw);

and restore by doing

Code:

   tcsetattr(STDIN_FILENO,TCSAFLUSH,&cur);

See the respective man pages to figure out how it works.

Siiiiiii · 01-04-2007, 10:13 AM

What's wrong with using curses?

culin · 01-04-2007, 10:22 PM

thanks tuxdev.....

but my question is as we do in VC++ to echo a charecter...........say char ch; ch=getch(); this will echo the charecter typed by the user and quits....so,can same thing work in linux...???? if no what to do to echo a charecter on the screen here ?? and the prototypes as in man pages for getch() cbreak() raw() and echo() simply accept nothing and returns int... how to use those in the programs...is there something else to be done...please gimme a simple code to echo a charecter on the screen...

Kumado · 04-07-2007, 11:02 PM

I am working at programming in Linux as well. I am used to the getch() command in windows and the getche() [which does the echo] that gets one character from the keyboard and continues right on.

What you rarely get is a real answer. It is a waste of time getting replies like that.

This site:

http://members.cox.net/midian/articles/ansic9.htm

is the 1st I have been able to find that comes close at all.
It uses getchar() command BUT you must hit return to continue.

Also :

http://www.linuxjournal.com/article/1138

lists the info on "one-character-at-a-time mode (getch() in DOS)". It seems good to have the device active like this and not waiting for the user forever but who would know to look for this?

I am looking to write a simple texted based game and I really do not want to press enter after every key.

I am looking further myself but if you find or have found anything, please let me know.

kumado