08-28-2009
Mac OS X is unix
Under the hood, Mac OS X is unix. I recommend that you familiarize yourself with the Terminal application (found in Utilities) and get a feel for the command line.
I have not needed to install a different Unix OS because I find the one included with Mac OS X to be more than sufficient for me. I did however install VMWare Fusion for Windows XP and I could install other OSes if I need to.
One way to easily extend the Mac OS X unix is to install Mac Ports found at
www.macports.org This utility let's you easily install a huge array of unix tools that may be missing from the stock Mac OS X toolbox.
Good luck.
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LEARN ABOUT FREEBSD
mac_prepare_file_label
MAC_PREPARE(3) BSD Library Functions Manual MAC_PREPARE(3)
NAME
mac_prepare, mac_prepare_type, mac_prepare_file_label, mac_prepare_ifnet_label, mac_prepare_process_label -- allocate appropriate storage for
mac_t
SYNOPSIS
#include <sys/mac.h>
int
mac_prepare(mac_t *mac, const char *elements);
int
mac_prepare_type(mac_t *mac, const char *name);
int
mac_prepare_file_label(mac_t *mac);
int
mac_prepare_ifnet_label(mac_t *mac);
int
mac_prepare_process_label(mac_t *mac);
DESCRIPTION
The mac_prepare family of functions allocates the appropriate amount of storage and initializes *mac for use by mac_get(3). When the result-
ing label is passed into the mac_get(3) functions, the kernel will attempt to fill in the label elements specified when the label was pre-
pared. Elements are specified in a nul-terminated string, using commas to delimit fields. Element names may be prefixed with the '?' char-
acter to indicate that a failure by the kernel to retrieve that element should not be considered fatal.
The mac_prepare() function accepts a list of policy names as a parameter, and allocates the storage to fit those label elements accordingly.
The remaining functions in the family make use of system defaults defined in mac.conf(5) instead of an explicit elements argument, deriving
the default from the specified object type.
mac_prepare_type() allocates the storage to fit an object label of the type specified by the name argument. The mac_prepare_file_label(),
mac_prepare_ifnet_label(), and mac_prepare_process_label() functions are equivalent to invocations of mac_prepare_type() with arguments of
"file", "ifnet", and "process" respectively.
RETURN VALUES
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the
error.
SEE ALSO
mac(3), mac_free(3), mac_get(3), mac_is_present(3), mac_set(3), mac(4), mac.conf(5), maclabel(7)
STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft continues on the cross-platform POSIX.1e implementation mailing
list. To join this list, see the FreeBSD POSIX.1e implementation page for more information.
HISTORY
Support for Mandatory Access Control was introduced in FreeBSD 5.0 as part of the TrustedBSD Project. Support for generic object types first
appeared in FreeBSD 5.2.
BSD
August 22, 2003 BSD