This controls how the DOS read only attribute should be mapped. This parameter can take three different values, which tell smbd 8 how to display the read only attribute on files, where either is set to No, or no extended attribute is present. The three settings are : Yes - The read only DOS attribute is mapped to the inverse of the user write bit in the unix permission mode Permissions - The read only DOS attribute is mapped to the effective permissions of the connecting user, as evaluated by smbd 8 by reading the unix permissions and POSIX ACL (if present). No - The read only DOS attribute is unaffected by permissions, and can only be set by the method. This may be useful for exporting mounted CDs. yes