13.1.2 SunOS 5.X
The /etc/profile is the system-wide Bourne and Korn shell profile script. It's executed before the user's $HOME/.profile. There is no similar system-wide script for the C shell under SunOS 4.1.X, though one can be set for the T-C shell, tcsh. For SunOS 5.X if the user doesn't have their own .login, then csh will read /etc/.login.