Send Break to terminal server

[Darren Tucker]

Avis wrote:

> Darren, thanks.
> I did try all combinations of '~b', '~B', '~<ctrl-B>', and even '~<alt-B>'.
> With the debug, it's obvious that you were right, '~B' was the one that
> triggered the request break.
> However, nothing happen in the request break function.
> Is there something I need to set in the compilation?
> Is there a library that I am missing?

No, there's nothing else to be done at compile time, and according to 
the debugging the break request is being sent just fine.

> bash-2.03# debug2: channel 0: request break
> ~B
> debug2: channel 0: written 4 to efd 7

It's possible that your terminal server does not like the length of the 
break requested (OpenSSH hard-codes that to 1000 ms).  You can fiddle 
with that at compile time, it's in clientloop.c around line 585:

case 'B':
	if (compat20) {
		snprintf(string, sizeof string,
		    "%cB\r\n", escape_char);
		buffer_append(berr, string,
		    strlen(string));
                                         						 
channel_request_start(session_ident,
		    "break", 0);
		packet_put_int(1000);
		packet_send();
	}

You can try changing the number inside the packet_put_int (I suggest 
trying "0" first as that the server should use "500ms or the default 
BREAK signal length of the chipset or underlying chipset driver.")

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
     Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.