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posix1e
POSIX1E(3) BSD Library Functions Manual POSIX1E(3)
NAME
posix1e -- introduction to the POSIX.1e security API
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#include <sys/acl.h>
#include <sys/mac.h>
DESCRIPTION
POSIX.1e describes five security extensions to the POSIX.1 API: Access Control Lists (ACLs), Auditing, Capabilities, Mandatory Access Con-
trol, and Information Flow Labels. While IEEE POSIX.1e D17 specification has not been standardized, several of its interfaces are widely
used.
FreeBSD implements POSIX.1e interface for access control lists, described in acl(3), and supports ACLs on the ffs(7) file system; ACLs must
be administratively enabled using tunefs(8).
FreeBSD implements a POSIX.1e-like mandatory access control interface, described in mac(3), although with a number of extensions and impor-
tant semantic differences.
FreeBSD does not implement the POSIX.1e audit, privilege (capability), or information flow label APIs. However, FreeBSD does implement the
libbsm audit API. It also provides capsicum(4), a lightweight OS capability and sandbox framework implementing a hybrid capability system
model.
ENVIRONMENT
POSIX.1e assigns security attributes to all objects, extending the security functionality described in POSIX.1. These additional attributes
store fine-grained discretionary access control information and mandatory access control labels; for files, they are stored in extended
attributes, described in extattr(3).
POSIX.2c describes a set of userland utilities for manipulating these attributes, including getfacl(1) and setfacl(1) for access control
lists, and getfmac(8) and setfmac(8) for mandatory access control labels.
SEE ALSO
getfacl(1), setfacl(1), extattr(2), acl(3), extattr(3), libbsm(3), libcapsicum(3), mac(3), capsicum(4), ffs(7), getfmac(8), setfmac(8),
tunefs(8), acl(9), extattr(9), mac(9)
STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17.
HISTORY
POSIX.1e support was introduced in FreeBSD 4.0; most features were available as of FreeBSD 5.0.
AUTHORS
Robert N M Watson
Chris D. Faulhaber
Thomas Moestl
Ilmar S Habibulin
BSD
April 15, 2014 BSD