Re: read a reply from the terminal

[Dan Nicolaescu]

Richard Stallman <address@hidden> writes:

  >     !       ;; Try to find out the type of terminal by sending a "Secondary
  >     !       ;; Device Attributes (DA)" query.
  >     !       (send-string-to-terminal "\e[>0c")
  >     ! 
  >     !       ;; The reply should be of the form: \e [ > NUMBER1 ; NUMBER2 ; 
NUMBER3 c
  >     !       (when (equal (read-event) ?\e)
  >     !       (when (equal (read-event) 91)
  > 
  > Is there any danger that some terminal programs won't implement
  > that query, and that these read-event calls will hang?

It's not impossible, someone can implement a terminal emulator that
does not support this type of query and still set TERM to xterm. Most
applications won't care.. To be safe adding a timeout to the
read-event call seems to be the right thing to do.

  > Perhaps the best thing to do is install the patch
  > and see if anyone complains.

I'll do that.

  >     + (defun xterm-turn-on-modifyOtherKeys ()
  > 
  > Please rename that to xterm-turn-on-modify-other-keys.
  > Likewise the following function.

Sure.