[PATCH] fhandler_tty deadlock patch + console

[Steve O <bub at io dot com>]

On Mon, Oct 21, 2002 at 12:20:38PM -0400, Christopher Faylor wrote:
> Keep resubmitting on large patch until it is accepted.
> 
> My time is limited right now so I may not be able to completely review
> this for a couple of weeks.  I'm going to be on a business trip starting
> on Wednesday.
> 
> So, I would appreciate it if people would try this out and report their
> experiences.
> 
> cgf

Here's the original patch plus the recent fix.
-steve

2002-10-17  Steve Osborn  <bub@io.com>

	* fhandler.cc (fhandler_base::put_readahead): Limited size of buffer
	to reduce amount of garbage from cat'ing a binary file. 
	* fhandler.h (fhandler_termios::doecho): Returns int, added force.
	(fhandler_termios::accept_input): Changed sense of return.
	(fhandler_termios::line_edit_cnt): Added.
	(fhandler_console::doecho): Returns int, added force.
	(fhandler_pty_master::doecho): Returns int, added force.
	(fhandler_pty_master::get_echobuf_valid): Added.
	(fhandler_pty_master::get_echobuf_into_buffer): Added.	
	(fhandler_pty_master::clear_echobuf): Added.	
	(fhandler_pty_master::ebbuf): Added pointer to echobuf.
	(fhandler_pty_master::ebixget): Added echobuf get index.
	(fhandler_pty_master::ebixput): Added echobuf put index.
	(fhandler_pty_master::ebbuflen): Added echobuf length.
	(fhandler_pty_master::ebguard): Added handle for guard mutex.
	* fhandler_termios.cc (fhandler_termios::line_edit): Wraps 
	line_edit_cnt to provide previous signature.
	(fhandler_termios::line_edit_cnt): Added line_edit function with the
	ability to report number of bytes written.  Handles cases where the
 	echo or readahead buffer is full. 
	(fhandler_termios::line_edit_cnt): Returns true if the last 
        character resulted in an input_done - necessary for console.
	* fhandler_tty.cc (fhandler_pty_master::get_echobuf_valid): Added.
	(fhandler_pty_master::doecho): Rewritten to return bytes written to 
	echobuf.  Added force option to expand the buffer as necessary.
	(fhandler_pty_master::get_echobuf_into_buffer): Added.	
	(fhandler_pty_master::clear_echobuf): Added.
	(fhandler_pty_master::accept_input): Sense of return changed to 
	number of bytes not written.  Added support for partial write.
	(fhandler_pty_master::process_slave_output): Prime read with echobuf.
	(fhandler_pty_master::fhandler_pty_master): Initializers for echobuf.
	(fhandler_pty_master::open): Calls clear_echobuf.
	(fhandler_pty_master::close): Calls clear_echobuf.
	(fhandler_pty_master::write): Returns number of bytes written.
	* select.cc (peek_pipe): Check for echobuf valid.

Attachment: tty2.patch
Description: Text document