Oops, I messed up when replying, so the messages didn't go to the list. Here
they are :
Me :
Yup, that's a problem. I don't know about other shells so I just made it for
sh/bash. I don't think there is a way to change the environment of a process
without giving it some kind of command. Ideal would be to switch between
different commands according to the shell type, or fail without doing
anything if the shell is unknown. I'm a newbie to emacs and lisp, so I just
made the code using what I could find. Hopefully someone will turn this
snippet into something worthy to be merged into main emacs (even if it
doesn't work for every shell known to man)

Stefan Monnier :
The problem is not too serious w.r.t shell-compatibility (you can make
it configurable).  It's more serious when you take into account the fact
that some other process (not a shell) might be running at that moment.
Have you try M-x term instead of M-x shell?  It's a different tradeoff,
but it should be able to accomodate window-size changes.


Me:
Well, that's the reason why the patch is to shell, not comint. Isn't shell
the specialized mode for dealing with shells only ?