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