Re: [Mac-emacs-users] different *shell* behavior between 21.1 and 21.2

[Andrew C. <ak...@sh...>]

> I compiled 21.2 with both cc and gcc3 and I got the same results.
> When I'm in a *shell* buffer, I can't run ssh because it complains
> that stdin is not a tty (or was it pty?).  In any case, 21.1
> (compiled with cc) works fine with ssh.  I know there are some
> issues with dropped characters (I haven't seen it myself), but this
> appears to be different behavior rather than a bug.  Any ideas?

Hi Rodney,

The change has to do with the use of ptys and pipes to communicate
with subprocesses.  Because people were not able to use ange-ftp with
pipes, the current setting compiles with ptys (and pipe, which is
always on) support but set process-connection-type to nil.  This
allows ange-ftp and tramp to work (since they set
process-connection-type to t locally) and other packages that use IPC
not to lose characters.

It seems ssh also needs a pty to work so all you need to do is set
process-connection-type to t before using it.  There's documentation
of this variable in the `Processes' section in the Emacs Lisp manual.

Andrew.