can we detect the closing of a terminal?

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

Gentlemen:

Whenever I open a terminal I have a mechanism for passing to it 
knowledge of the current $PWD of any other open terminals.  It's 
cumbersome but it works.  Problem is that it's a one way thing in that 
when a terminal closes, that information is not passed, so there is 
orphan information.  Is there some 'pre-close()' function for 
terminals?  Sort of a suicide note? Or it might be about the same thing 
to have a function that's called before a shell exits 'zsh-pre-close()' 
, tho of course there can be several layers of shells in one terminal, 
but I guess that one can test for the 'zero' level shell in any given 
terminal.  I'll bet there is one for the shell, but for the terminal 
that might be wishing upon a star.