just issue...
umask 0022
...or whatever setting you prefer.

[type help umask for a short blurb about it.]

-edit-

Hey cool: i never knew we could talk to it symbolically...

$ umask u=rwx,go=
$ umask
0077
$ umask g=rx
$ umask
0027
$ umask go=rx
$ umask
0022


Last edited by Hal Itosis; 04/02/10 06:07 PM. Reason: further reduction