umask is a synonym for aclumask.
This command only applies in multiuser mode.
None.
aclumask [[users]+bits | [users]-bits … ]umask [[users]+bits | [users]-bits … ]
This specifies the access other users have to windows that will be created by the caller of the command. Users may be no, one or a comma separated list of known usernames. If no users are specified, a list of all currently known users is assumed. Bits is any combination of access control bits allowed defined with the “aclchg” command. The special username “?” predefines the access that not yet known users will be granted to any window initially. The special username “??” predefines the access that not yet known users are granted to any command. Rights of the special username nobody cannot be changed (see the “su” command).
None yet.