BLMINMAX(3TSOL) Trusted Extensions Library Functions BLMINMAX(3TSOL)


NAME


blminmax, blmaximum, blminimum - bound of two labels

SYNOPSIS


cc [flag...] file... -ltsol [library...]


#include <tsol/label.h>

void blmaximum(m_label_t *maximum_label,
const m_label_t *bounding_label);


void blminimum(m_label_t *minimum_label,
const m_label_t *bounding_label);


DESCRIPTION


The blmaximum() function replaces the contents of label maximum_label
with the least upper bound of the labels maximum_label and
bounding_label. The least upper bound is the greater of the
classifications and all of the compartments of the two labels. This is
the least label that dominates both of the original labels.


The blminimum() function replaces the contents of label minimum_label
with the greatest lower bound of the labels minimum_label and
bounding_label. The greatest lower bound is the lower of the
classifications and only the compartments that are contained in both
labels. This is the greatest label that is dominated by both of the
original labels.

ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO


label_to_str(3TSOL), libtsol(3LIB), sbltos(3TSOL), attributes(5)

NOTES


The functionality described on this manual page is available only if the
system is configured with Trusted Extensions.


July 20, 2007 BLMINMAX(3TSOL)