bug#1267: Emacsclient can't find terminal in daemon mode

[Chong Yidong <cyd@stupidchicken.com>]

Dan Nicolaescu <dann@ics.uci.edu> writes:

> In you particular emacsly Emacs uses the "initial frame" to show the
> file, which is probably not ideal.
> This particular case can be solved by trying to see if the
> `(selected-frame)' is FRAME_INITIAL_P (which is not exposed to elisp).
> We can guess that if there's no window-system and tty-type frame
> parameter we are dealing with the initial frame.
>
> Not sure if this is good enough to cover all possible cases... 

The patch you sent won't work on a text-only terminal.

I think a better approach is to change emacsclient so that it sends the
tty name/type if it is supposed to "use the current frame" (normally, it
doesn't do this unless the -t option is provided).  Then, the Emacs
server should check whether it can actually use the current frame; if
not, it tries X; if that fails, it falls back on using the tty specified
by emacsclient.