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Contents of /eclass/selinux-policy-2.eclass

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Mon Aug 29 01:28:10 2011 UTC (3 years ago) by vapier
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1 # Copyright 1999-2011 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/selinux-policy-2.eclass,v 1.10 2011/08/22 19:51:33 swift Exp $
4
5 # Eclass for installing SELinux policy, and optionally
6 # reloading the reference-policy based modules.
7
8 # @ECLASS: selinux-policy-2.eclass
9 # @MAINTAINER:
10 # selinux@gentoo.org
11 # @BLURB: This eclass supports the deployment of the various SELinux modules in sec-policy
12 # @DESCRIPTION:
13 # The selinux-policy-2.eclass supports deployment of the various SELinux modules
14 # defined in the sec-policy category. It is responsible for extracting the
15 # specific bits necessary for single-module deployment (instead of full-blown
16 # policy rebuilds) and applying the necessary patches.
17 #
18 # Also, it supports for bundling patches to make the whole thing just a bit more
19 # manageable.
20
21 # @ECLASS-VARIABLE: MODS
22 # @DESCRIPTION:
23 # This variable contains the (upstream) module name for the SELinux module.
24 # This name is only the module name, not the category!
25 : ${MODS:="_illegal"}
26
27 # @ECLASS-VARIABLE: BASEPOL
28 # @DESCRIPTION:
29 # This variable contains the version string of the selinux-base-policy package
30 # that this module build depends on. It is used to patch with the appropriate
31 # patch bundle(s) that are part of selinux-base-policy.
32 : ${BASEPOL:=""}
33
34 # @ECLASS-VARIABLE: POLICY_PATCH
35 # @DESCRIPTION:
36 # This variable contains the additional patch(es) that need to be applied on top
37 # of the patchset already contained within the BASEPOL variable. The variable
38 # can be both a simple string (space-separated) or a bash array.
39 : ${POLICY_PATCH:=""}
40
41 # @ECLASS-VARIABLE: POLICY_TYPES
42 # @DESCRIPTION:
43 # This variable informs the eclass for which SELinux policies the module should
44 # be built. Currently, Gentoo supports targeted, strict, mcs and mls.
45 # This variable is the same POLICY_TYPES variable that we tell SELinux
46 # users to set in /etc/make.conf. Therefor, it is not the module that should
47 # override it, but the user.
48 : ${POLICY_TYPES:="targeted strict mcs mls"}
49
50 inherit eutils
51
52 IUSE=""
53
54 HOMEPAGE="http://www.gentoo.org/proj/en/hardened/selinux/"
55 if [[ -n ${BASEPOL} ]];
56 then
57 SRC_URI="http://oss.tresys.com/files/refpolicy/refpolicy-${PV}.tar.bz2
58 http://dev.gentoo.org/~swift/patches/selinux-base-policy/patchbundle-selinux-base-policy-${BASEPOL}.tar.bz2"
59 else
60 SRC_URI="http://oss.tresys.com/files/refpolicy/refpolicy-${PV}.tar.bz2"
61 fi
62
63 LICENSE="GPL-2"
64 SLOT="0"
65 S="${WORKDIR}/"
66 PATCHBUNDLE="${DISTDIR}/patchbundle-selinux-base-policy-${BASEPOL}.tar.bz2"
67
68 # Modules should always depend on at least the first release of the
69 # selinux-base-policy for which they are generated.
70 if [[ -n ${BASEPOL} ]];
71 then
72 RDEPEND=">=sys-apps/policycoreutils-2.0.82
73 >=sec-policy/selinux-base-policy-${BASEPOL}"
74 else
75 RDEPEND=">=sys-apps/policycoreutils-2.0.82
76 >=sec-policy/selinux-base-policy-${PV}"
77 fi
78 DEPEND="${RDEPEND}
79 sys-devel/m4
80 >=sys-apps/checkpolicy-2.0.21"
81
82 SELINUX_EXPF="src_unpack src_compile src_install pkg_postinst"
83 case "${EAPI:-0}" in
84 2|3|4) SELINUX_EXPF+=" src_prepare" ;;
85 *) ;;
86 esac
87
88 EXPORT_FUNCTIONS ${SELINUX_EXPF}
89
90 # @FUNCTION: selinux-policy-2_src_unpack
91 # @DESCRIPTION:
92 # Unpack the policy sources as offered by upstream (refpolicy). In case of EAPI
93 # older than 2, call src_prepare too.
94 selinux-policy-2_src_unpack() {
95 unpack ${A}
96
97 # Call src_prepare explicitly for EAPI 0 or 1
98 has "${EAPI:-0}" 0 1 && selinux-policy-2_src_prepare
99 }
100
101 # @FUNCTION: selinux-policy-2_src_prepare
102 # @DESCRIPTION:
103 # Patch the reference policy sources with our set of enhancements. Start with
104 # the base patchbundle referred to by the ebuilds through the BASEPOL variable,
105 # then apply the additional patches as offered by the ebuild.
106 #
107 # Next, extract only those files needed for this particular module (i.e. the .te
108 # and .fc files for the given module in the MODS variable).
109 #
110 # Finally, prepare the build environments for each of the supported SELinux
111 # types (such as targeted or strict), depending on the POLICY_TYPES variable
112 # content.
113 selinux-policy-2_src_prepare() {
114 local modfiles
115
116 # Patch the sources with the base patchbundle
117 if [[ -n ${BASEPOL} ]];
118 then
119 cd "${S}"
120 EPATCH_MULTI_MSG="Applying SELinux policy updates ... " \
121 EPATCH_SUFFIX="patch" \
122 EPATCH_SOURCE="${WORKDIR}" \
123 EPATCH_FORCE="yes" \
124 epatch
125 fi
126
127 # Apply the additional patches refered to by the module ebuild.
128 # But first some magic to differentiate between bash arrays and strings
129 if [[ "$(declare -p POLICY_PATCH 2>/dev/null 2>&1)" == "declare -a"* ]];
130 then
131 cd "${S}/refpolicy/policy/modules"
132 for POLPATCH in "${POLICY_PATCH[@]}";
133 do
134 epatch "${POLPATCH}"
135 done
136 else
137 if [[ -n ${POLICY_PATCH} ]];
138 then
139 cd "${S}/refpolicy/policy/modules"
140 for POLPATCH in ${POLICY_PATCH};
141 do
142 epatch "${POLPATCH}"
143 done
144 fi
145 fi
146
147 # Collect only those files needed for this particular module
148 for i in ${MODS}; do
149 modfiles="$(find ${S}/refpolicy/policy/modules -iname $i.te) $modfiles"
150 modfiles="$(find ${S}/refpolicy/policy/modules -iname $i.fc) $modfiles"
151 done
152
153 for i in ${POLICY_TYPES}; do
154 mkdir "${S}"/${i} || die "Failed to create directory ${S}/${i}"
155 cp "${S}"/refpolicy/doc/Makefile.example "${S}"/${i}/Makefile \
156 || die "Failed to copy Makefile.example to ${S}/${i}/Makefile"
157
158 cp ${modfiles} "${S}"/${i} \
159 || die "Failed to copy the module files to ${S}/${i}"
160 done
161 }
162
163 # @FUNCTION: selinux-policy-2_src_compile
164 # @DESCRIPTION:
165 # Build the SELinux policy module (.pp file) for just the selected module, and
166 # this for each SELinux policy mentioned in POLICY_TYPES
167 selinux-policy-2_src_compile() {
168 for i in ${POLICY_TYPES}; do
169 # Parallel builds are broken, so we need to force -j1 here
170 emake -j1 NAME=$i -C "${S}"/${i} || die "${i} compile failed"
171 done
172 }
173
174 # @FUNCTION: selinux-policy-2_src_install
175 # @DESCRIPTION:
176 # Install the built .pp files in the correct subdirectory within
177 # /usr/share/selinux.
178 selinux-policy-2_src_install() {
179 local BASEDIR="/usr/share/selinux"
180
181 for i in ${POLICY_TYPES}; do
182 for j in ${MODS}; do
183 einfo "Installing ${i} ${j} policy package"
184 insinto ${BASEDIR}/${i}
185 doins "${S}"/${i}/${j}.pp || die "Failed to add ${j}.pp to ${i}"
186 done
187 done
188 }
189
190 # @FUNCTION: selinux-policy-2_pkg_postinst
191 # @DESCRIPTION:
192 # Install the built .pp files in the SELinux policy stores, effectively
193 # activating the policy on the system.
194 selinux-policy-2_pkg_postinst() {
195 # build up the command in the case of multiple modules
196 local COMMAND
197 for i in ${MODS}; do
198 COMMAND="-i ${i}.pp ${COMMAND}"
199 done
200
201 for i in ${POLICY_TYPES}; do
202 einfo "Inserting the following modules into the $i module store: ${MODS}"
203
204 cd /usr/share/selinux/${i} || die "Could not enter /usr/share/selinux/${i}"
205 semodule -s ${i} ${COMMAND} || die "Failed to load in modules ${MODS} in the $i policy store"
206 done
207 }

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