Programming

Hi all,

Am trying to develop CLI kind of program which does a telcom switch configuration [same like cisco IOS cli]. I have to provide a terminal and a prompt to user for that I did following:

Code:

 static struct termios old_term;
 struct termios new_term;

 tcgetattr(STDIN_FILENO, &old_term);
 new_term = old_term;
 new_term.c_lflag &= ~(ICANON | ECHO);
 tcsetattr(STDIN_FILENO, TCSANOW, &new_term);

This giving me a good control prompt where I can enter whole command string and history & tab features are working too..

But the problem is return key seems not working. When I just press enter key the prompt doesn't go to next line it stays on the same line and shows me next prompt.

if I press 4 times enter key .. it looks like

Code:

cli>cli>cli>cli>cli>

why its not entering to new line? please suggest..

Thanks...

is ECHONL set? Does not look like it to me. If not set then the terminal will not echo a newline.

hi jim,

thanks for your response ..

yeah actually am coding for non-canonical mode its ICANON is unset.
& ECHONL will work only when ICANON is set so...

is there any way to have new line enabled for non-canonical mode?? I need to have some way to get the prompt new line when return key is pressed.

Turn off echo completely and printf every keystroke as you read it - only choice I can see.