MAC_PREPARE(3)         FreeBSD Library Functions Manual         MAC_PREPARE(3)

NAME
     mac_prepare, mac_prepare_type, mac_prepare_file_label,
     mac_prepare_ifnet_label, mac_prepare_process_label - allocate appropriate
     storage for mac_t

SYNOPSIS
     #include <sys/mac.h>

     int
     mac_prepare(mac_t *mac, const char *elements);

     int
     mac_prepare_type(mac_t *mac, const char *name);

     int
     mac_prepare_file_label(mac_t *mac);

     int
     mac_prepare_ifnet_label(mac_t *mac);

     int
     mac_prepare_process_label(mac_t *mac);

DESCRIPTION
     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 `?' 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.

RETURN VALUES
     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

SEE ALSO
     mac(3), mac_free(3), mac_get(3), mac_is_present(3), mac_set(3), mac(4),
     mac.conf(5), maclabel(7)

STANDARDS
     POSIX.1e is described in IEEE POSIX.1e draft 17.  Discussion of the draft
     continues on the cross-platform POSIX.1e implementation mailing list.  To
     join this list, see the FreeBSD POSIX.1e implementation page for more
     information.

HISTORY
     Support for Mandatory Access Control was introduced in FreeBSD 5.0 as
     part of the TrustedBSD Project.  Support for generic object types first
     appeared in FreeBSD 5.2.

FreeBSD 13.1-RELEASE-p6         August 22, 2003        FreeBSD 13.1-RELEASE-p6