default search path for root

[Jeff Woodward]

i am having a heck of a time trying to find out how to set the
default search paths for standard users, and especially the
root user, in both system V and sunOS environments. yeah,
i know about "profile" for system V, and about .cshrc and
.login, and .profile for root, but how do i change the
"su" default path in system V?  

how do i do that for ALL users in sunOS?  

in particular, i'd really like to know where this info
is stashed in the manuals, cuz i've looked, but i can
t seem to find it.  i'd really like to know for future
ref!

thanks in advance for your help.

jp woodward
univ of ill at chicago