MAC_IS_PRESENT(3)      FreeBSD Library Functions Manual      MAC_IS_PRESENT(3)

NAME
     mac_is_present - report whether the running system has MAC support

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/mac.h>

     int
     mac_is_present(const char *policyname);

DESCRIPTION
     The mac_is_present() function determines whether the currently-running
     kernel supports MAC for a given policy or not.  If policyname is
     non-NULL, the presence of the named policy (e.g. "biba", "mls", "te") is
     checked, otherwise the presence of any MAC policies at all is checked.

RETURN VALUES
     If the system supports the given MAC policy, the value 1 is returned.  If
     the specified MAC policy is not supported, the value 0 is returned.  If
     an error occurs, the value -1 is returned.

ERRORS
     [EINVAL]           The value of policyname is not valid.

     [ENOMEM]           Insufficient memory was available to allocate internal
                        storage.

SEE ALSO
     mac(3), mac_free(3), mac_get(3), mac_prepare(3), mac_set(3), mac_text(3),
     mac(4), mac(9)

HISTORY
     Support for Mandatory Access Control was introduced in FreeBSD 5.0 as
     part of the TrustedBSD Project.

FreeBSD 13.1-RELEASE-p6          July 7, 2006          FreeBSD 13.1-RELEASE-p6