The file may not be changed.
.It SF_APPEND
The file may only be appended to.
+.It SF_DATALESSFAULT
+The file is a dataless placeholder.
+The system will attempt to materialize it when accessed according to the dataless file materialization policy of the accessing thread or process.
+See
+.Xr getiopolicy_np 3 .
.El
.Pp
The
and
.Dq SF_APPEND
flags may only be set or unset by the super-user.
+.Pp
+The
+.Dq SF_DATALESSFAULT
+flag is an internal flag and may not be set from user space.
.Sh RETURN VALUES
Upon successful completion, a value of 0 is returned.
Otherwise, -1 is returned and the global variable