The
mac_prepare
family of functions allocates the appropriate amount of storage and initializes
*mac
for use by
mac_get(3).
When the resulting label is passed into the
mac_get(3)
functions, the kernel will attempt to fill in the label elements specified
when the label was prepared.
Elements are specified in a nul-terminated string, using commas to
delimit fields.
Element names may be prefixed with the
‘
amp;?’
character to indicate that a failure by the kernel to retrieve that
element should not be considered fatal.
The
mac_prepare()
function accepts a list of policy names as a parameter, and allocates the
storage to fit those label elements accordingly.
The remaining functions in the family make use of system defaults defined
in
mac.conf(5)
instead of an explicit
elements
argument, deriving the default from the specified object type.
mac_prepare_type()
allocates the storage to fit an object label of the type specified by
the
name
argument.
The
mac_prepare_file_label(),
mac_prepare_ifnet_label(),
and
mac_prepare_process_label()
functions are equivalent to invocations of
mac_prepare_type()
with arguments of
"file",
"ifnet",
and
"process"
respectively.
