selinux-policy/README

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1) Reference Policy make targets:
General Make targets:
install-src Install the policy sources into
/etc/selinux/NAME/src/policy, where NAME is defined in
the Makefile. If not defined, the TYPE, as defined in
the Makefile, is used. The default NAME is refpolicy.
A pre-existing source policy will be moved to
/etc/selinux/NAME/src/policy.bak.
conf Regenerate policy.xml, and update/create modules.conf
and booleans.conf. This should be done after adding
or removing modules, or after running the bare target.
If the configuration files exist, their settings will
be preserved. This must be ran on policy sources that
are checked out from the CVS repository before they can
be used.
clean Delete all temporary files, compiled policies,
and file_contexts. Configuration files are left intact.
bare Do the clean make target and also delete configuration
files, web page documentation, and policy.xml.
html Regenerate policy.xml and create web page documentation
in the doc/html directory.
Make targets specific to modular (loadable modules) policies:
base Compile and package the base module. This is the
default target for modular policies.
modules Compile and package all Reference Policy modules
configured to be built as loadable modules.
MODULENAME.pp Compile and package the MODULENAME Reference Policy
module.
all Compile and package the base module and all Reference
Policy modules configured to be built as loadable
modules.
install Compile, package, and install the base module and
Reference Policy modules configured to be built as
loadable modules.
load Compile, package, and install the base module and
Reference Policy modules configured to be built as
loadable modules, then insert them into the module
store.
validate Validate if the configured modules can successfully
link and expand.
install-headers Install the policy headers into /usr/share/selinux/NAME.
The headers are sufficient for building a policy
module locally, without requiring the complete
Reference Policy sources. The build.conf settings
for this policy configuration should be set before
using this target.
Make targets specific to monolithic policies:
policy Compile a policy locally for development and testing.
This is the default target for monolithic policies.
install Compile and install the policy and file contexts.
load Compile and install the policy and file contexts, then
load the policy.
enableaudit Remove all dontaudit rules from policy.conf.
relabel Relabel the filesystem.
checklabels Check the labels on the filesystem, and report when
a file would be relabeled, but do not change its label.
restorelabels Relabel the filesystem and report each file that is
relabeled.
2) Reference Policy Build Options (build.conf)
TYPE String. Available options are strict, targeted,
strict-mls, targeted-mls, strict-mcs, and targeted-mcs.
This sets the policy type as strict or targeted, and
optionally enables multi-leve security (MLS) or
multi-category security (MCS) features. This option
controls strict_policy, targeted_policy, enable_mls,
and enable_mcs policy blocks.
NAME String (optional). Sets the name of the policy; the
NAME is used when installing files to e.g.,
/etc/selinux/NAME and /usr/share/selinux/NAME. If not
set, the policy type (TYPE) is used.
DISTRO String (optional). Enable distribution-specific policy.
Available options are redhat, rhel4, gentoo, debian,
and suse. This option controls distro_redhat,
distro_rhel4, distro_gentoo, distro_debian, and
distro_suse policy blocks.
MONOLITHIC Boolean. If set, a monolithic policy is built,
otherwise a modular policy is built.
DIRECT_INITRC Boolean. If set, sysadm will be allowed to directly
run init scripts, instead of requiring the run_init
tool. This is a build option instead of a tunable since
role transitions do not work in conditional policy.
This option controls direct_sysadm_daemon policy
blocks.
POLY Boolean. If set, policy for polyinstantiated
directories will be enabled. This option controls
enable_polyinstantiation policy blocks.
OUTPUT_POLICY Integer. Set the version of the policy created when
building a monolithic policy. This option has no effect
on modular policy.
QUIET Boolean. If set, the build system will only display
status messages and error messages. This option has no
effect on policy.
3) Reference Policy Files and Directories
All directories relative to the root of the Reference Policy sources directory.
Makefile General rules for building the policy.
Rules.modular Makefile rules specific to building loadable module
policies.
Rules.monolithic Makefile rules specific to building monolithic policies.
build.conf Options which influence the building of the policy,
such as the policy type (strict, targeted, etc.)
and distribution.
config/appconfig-* Application configuration files for all configurations
of the Reference Policy (targeted/strict with or without
MLS or MCS). These are used by SELinux-aware programs.
config/local.users The file read by load policy for adding SELinux users
to the policy on the fly.
doc/html/* This contains the contents of the in-policy XML
documentation, presented in web page form.
doc/policy.dtd The doc/policy.xml file is validated against this DTD.
doc/policy.xml This file is generated/updated by the conf and html make
targets. It contains the complete XML documentation
included in the policy.
doc/templates/* Templates used for documentation web pages.
policy/booleans.conf This file is generated/updated by the conf make target.
It contains the booleans in the policy, and their
default values. If tunables are implemented as
booleans, tunables will also be included. This file
will be installed as the /etc/selinux/NAME/booleans
file.
policy/constraints This file defines additional constraints on permissions
in the form of boolean expressions that must be
satisfied in order for specified permissions to be
granted. These constraints are used to further refine
the type enforcement rules and the role allow rules.
Typically, these constraints are used to restrict
changes in user identity or role to certain domains.
policy/global_booleans This file defines all booleans that have a global scope,
their default value, and documentation.
policy/global_tunables This file defines all tunables that have a global scope,
their default value, and documentation.
policy/flask/initial_sids This file has declarations for each initial SID.
policy/flask/security_classes This file has declarations for each security class.
policy/flask/access_vectors This file defines the access vectors. Common
prefixes for access vectors may be defined at the
beginning of the file. After the common prefixes are
defined, an access vector may be defined for each
security class.
policy/mcs The multi-category security (MCS) configuration.
policy/mls The multi-level security (MLS) configuration.
policy/modules/* Each directory represents a layer in Reference Policy
all of the modules are contained in one of these layers.
policy/modules.conf This file contains a listing of available modules, and
how they will be used when building Reference Policy. To
prevent a module from being used, set the module to
"off". For monolithic policies, modules set to "base"
and "module" will be included in the policy. For
modular policies, modules set to "base" will be included
in the base module; those set to "module" will be
compiled as individual loadable modules.
policy/rolemap This file contains prefix and user domain type that
corresponds to each user role. The contents of this
file will be used to expand the per-user domain
templates for each module.
policy/support/* Support macros.
policy/users This file defines the users included in the policy.
support/* Tools used in the build process.
4) Building policy modules using Reference Policy headers:
The system must first have the Reference Policy headers installed, typically
by the distribution. Otherwise, the headers can be installed using the
install-headers target from the full Reference Policy sources.
To set up a directory to build a local module, one must simply place a .te
file in a directory. A sample Makefile to use in the directory is the
Makefile.example in the doc directory. This may be installed in
/usr/share/doc, under the directory for the distribution's policy.
Alternatively, the primary Makefile in the headers directory (typically
/usr/share/selinux/NAME/Makefile) can be called directly, using make's -f
option.
Larger projects can set up a structure of layers, just as in Reference
Policy, by creating policy/modules/LAYERNAME directories. Each layer also
must have a metadata.xml file which is an XML file with a summary tag and
optional desc (long description) tag. This should describe the purpose of
the layer.
Metadata.xml example:
<summary>ABC modules for the XYZ components.</summary>
Make targets for modules built from headers:
MODULENAME.pp Compile and package the MODULENAME local module.
all Compile and package the modules in the current
directory.
load Compile and package the modules in the current
directory, then insert them into the module store.
refresh Attempts to reinsert all modules that are currently
in the module store from the local and system module
packages.
xml Build a policy.xml from the XML included with the
base policy headers and any XML in the modules in
the current directory.