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POSIX1E(3)             FreeBSD Library Functions Manual             POSIX1E(3)

     posix1e - introduction to the POSIX.1e security API

     Standard C Library (libc, -lc)

     #include <sys/types.h>
     #include <sys/acl.h>
     #include <sys/mac.h>

     POSIX.1e describes five security extensions to the POSIX.1 API: Access
     Control Lists (ACLs), Auditing, Capabilities, Mandatory Access Control,
     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 important
     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.

     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.

     getfacl(1), setfacl(1), extattr(2), acl(3), extattr(3), libbsm(3),
     libcasper(3), mac(3), capsicum(4), ffs(7), getfmac(8), setfmac(8),
     tunefs(8), acl(9), extattr(9), mac(9)

     POSIX.1e is described in IEEE POSIX.1e draft 17.

     POSIX.1e support was introduced in FreeBSD 4.0; most features were
     available as of FreeBSD 5.0.

     Robert N M Watson
     Chris D. Faulhaber
     Thomas Moestl
     Ilmar S Habibulin

FreeBSD 11.1-RELEASE-p4        February 25, 2016       FreeBSD 11.1-RELEASE-p4
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