Re: Terminal parameters patch

Stephen Hurd <[email protected]> writes:

>Hrm... how about the env variables TERM, COLUMNS and LINE as specified by
>SUSv2 here:
>
>http://pubs.opengroup.org/onlinepubs/7908799/xbd/envvar.html

This still has the issue that it solves one particular problem for one user,
leading to the same variable-explosion problem I mentioned before when
everyone wants their own set of SSH parameters.  

However in this specific case SSH does support this as an "env" channel
request, you could probably do it via the CRYPT_SESSINFO_SSH_CHANNEL
attributes which allow you to construct your own channel requests.  At the
moment this facility is only used for things like subsystem requests, and even
then is disabled by default because it's virtually never used and adds a lot
of complexity (meaning attack surface).

On the server side it's done via processChannelRequest() in ssh2_msgs.c, on
the client side it's done via createOpenRequest() in ssh2_msgc.c.  Also, if
all you want to do is change the window size then you could send a "window-
change" channel request instead of an "env" one.  This may require a bit of
extra plumbing in the code, because of its lack (or possibly even complete
absence) of use it hasn't had much attention.

Peter.

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