SYSTEM CALLS
    umask		- set the default file protection mask

INVOCATION
    int umask( new_mask )
      int  new_mask;

EXPLANATION
    Whenever a file is created its protection mask is AND'ed with
    the complement of the lower 9 bits of <new_mask>.

RESULTS
    The previous mask contents.

REFERENCES
    chmod(2), creat(2)
