[Cialug] directory permissions - a little help?

[Nathan C. Smith]

I want to set permissions on a directory (actually a subdirectory) to world
readable and writeable whenever a file is written there.  I must be missing
something because I thought that's what umask was for.  files continue to be
written into the directory with root-only permissions.

In Windows permissions I would stop the inheritance and give the directory
it's own permissions, I'm not sure how to do this in linux.

Can anybody point me in the right (rwx) direction?  Thanks.

-Nate