sharing memory (re-send)

[SINGLE,THOMAS GEORGE]

Ok, here's my task: I am writing a menu-oriented Unix Sys V shell and I want to
include a finger command. Instead of doing a linear search of /etc/passwd each 
time, I would prefer to simply use a b-tree from a daemon program.

The menu shell, mensh, would have a status screen that would include number 
of users logged on, etc. However, this information would come from the daemon.
The mensh would just pull this information from the memory of the daemon c 
program.

The question I am asking is how can the addresses pointed to by one program be
accessed from another program assuming that both have agreed on where certain
values would be kept in memory?

...!gatech!pyr!gt4702b