SEMODULE - Online Linux Manual PageSection : 8
Updated : Nov 2005
Source : Security Enhanced Linux
Note : NSA
NAMEsemodule − Manage SELinux policy modules.
SYNOPSISsemodule [option]... MODE...
DESCRIPTIONsemodule is the tool used to manage SELinux policy modules, including installing, upgrading, listing and removing modules. semodule may also be used to force a rebuild of policy from the module store and/or to force a reload of policy without performing any other transaction. semodule acts on module packages created by semodule_package. Conventionally, these files have a .pp suffix (policy package), although this is not mandated in any way.
MODES−R, −−reload force a reload of policy −B, −−build force a rebuild of policy (also reloads unless −n is used) −−refresh Like −−build, but reuses existing linked policy if no changes to module files are detected (by comparing with checksum from the last transaction). One can use this instead of −B to ensure that any changes to the module store done by an external tool (e.g. a package manager) are applied, while automatically skipping the module re-linking if there are no module changes. −D, −−disable_dontaudit Temporarily remove dontaudits from policy. Reverts whenever policy is rebuilt −i,−−install=MODULE_PKG install/replace a module package −u,−−upgrade=MODULE_PKG deprecated, alias for --install −b,−−base=MODULE_PKG deprecated, alias for --install −r,−−remove=MODULE_NAME remove existing module at desired priority (defaults to -X 400) −l[KIND],−−list-modules[=KIND] display list of installed modules (other than base) KIND: standard list highest priority, enabled, non-base modules full list all modules −X,−−priority=PRIORITY set priority for following operations (1-999) −e,−−enable=MODULE_NAME enable module −d,−−disable=MODULE_NAME disable module −E,−−extract=MODULE_PKG Extract a module from the store as an HLL or CIL file to the current directory. A module is extracted as HLL by default. The name of the module written is <module-name>.<lang_ext>
OPTIONS−s,−−store name of the store to operate on −n,−−noreload,−N do not reload policy after commit −h,−−help prints help message and quit −P,−−preserve_tunables Preserve tunables in policy −C,−−ignore-module-cache Recompile CIL modules built from HLL files −p,−−path Use an alternate path for the policy root −S,−−store-path Use an alternate path for the policy store root −v,−−verbose be verbose −c,−−cil Extract module as a CIL file. This only affects the −−extract option and only modules listed in −−extract after this option. −H,−−hll Extract module as an HLL file. This only affects the −−extract option and only modules listed in −−extract after this option. −m,−−checksum Add SHA256 checksum of modules to the list output.
EXAMPLE# Install or replace a base policy package.
$ semodule −b base.pp
# Install or replace a non-base policy package.
$ semodule −i httpd.pp
# Install or replace all non-base modules in the current directory.
# This syntax can be used with -i/u/r/E, but no other option can be entered after the module names
$ semodule −i *.pp
# Install or replace all modules in the current directory.
$ ls *.pp | grep −Ev "base.pp|enableaudit.pp" | xargs /usr/sbin/semodule −b base.pp −i
# List non-base modules.
$ semodule −l
# List all modules including priorities
$ semodule −lfull
# Remove a module at priority 100
$ semodule −X 100 −r wireshark
# Turn on all AVC Messages for which SELinux currently is "dontaudit"ing.
$ semodule −DB
# Turn "dontaudit" rules back on.
$ semodule −B
# Disable a module (all instances of given module across priorities will be disabled).
$ semodule −d alsa
# Install a module at a specific priority.
$ semodule −X 100 −i alsa.pp
# List all modules.
$ semodule −−list=full
# Set an alternate path for the policy root
$ semodule −B −p "/tmp"
# Set an alternate path for the policy store root
$ semodule −B −S "/tmp/var/lib/selinux"
# Write the HLL version of puppet and the CIL version of wireshark
# modules at priority 400 to the current working directory
$ semodule −X 400 −−hll −E puppet −−cil −E wireshark
# Check whether a module in "localmodule.pp" file is same as installed module "localmodule"
$ /usr/libexec/selinux/hll/pp localmodule.pp | sha256sum
$ semodule -l -m | grep localmodule
SEE ALSOcheckmodule(8), semodule_package(8)
AUTHORSThis manual page was written by Dan Walsh <dwalsh@redhat.com>.
The program was written by Karl MacMillan <kmacmillan@tresys.com>, Joshua Brindle <jbrindle@tresys.com>, Jason Tang <jtang@tresys.com>
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