Need to use newgrp or equivalent

[L. Mark Larsen]

Assuming you are using the standard /bin/sh, turning on the setuid bit
of /bin/newgrp is unlikely to have any impact since the newgrp command
is a built-in command (also built-in in ksh).  Without further details,
it is hard to say what might be the problem.  Suffice it to say that
newgrp works fine in SysV UNIX.

L. Mark Larsen
lml at atlas.att.com
att!atlas!lml