修改清单
system/core/rootdir/init.rc
system/sepolicy/private/file_contexts_asan
system/sepolicy/private/wallpaper.te
system/sepolicy/private/compat/31.0/31.0.ignore.cil
system/sepolicy/private/compat/32.0/32.0.ignore.cil
system/sepolicy/public/wallpaper.te
system/sepolicy/prebuilts/api/33.0/private/file_contexts_asan
system/sepolicy/prebuilts/api/33.0/private/wallpaper.te
system/sepolicy/prebuilts/api/33.0/private/compat/31.0/31.0.ignore.cil
system/sepolicy/prebuilts/api/33.0/private/compat/32.0/32.0.ignore.cil
system/sepolicy/prebuilts/api/33.0/public/wallpaper.te
一上来按照之前经验增加 wallpaper.te 文件，编译直接报错
错误一
ermediates/built_28.0_plat_sepolicy -o out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/built_28.0_plat_sepolicy -f /dev/null )"
system/sepolicy/prebuilts/api/28.0/public/wallpaper.te:4:ERROR 'attribute system_file_type is not declared' at token ';' on line 17448:
type wallpaper_exec, system_file_type, exec_type, file_type;
type wallpaper, domain;
checkpolicy: error(s) encountered while parsing configuration
16:45:14 ninja failed with: exit status 1
和文件格式之类的有关系
在 file_contexts 中发现了一个例子 extra_free_kbytes.sh 看着靠谱，就直接复用它来
grep extra_free_kbytes_exec ./system/sepolicy/ -nir
./system/sepolicy/private/file_contexts:233:/system/bin/extra_free_kbytes.sh u:object_r:extra_free_kbytes_exec:s0
./system/sepolicy/private/compat/31.0/31.0.ignore.cil:19: extra_free_kbytes_exec
./system/sepolicy/private/compat/32.0/32.0.ignore.cil:29: extra_free_kbytes_exec
./system/sepolicy/public/extra_free_kbytes.te:3:type extra_free_kbytes_exec, system_file_type, exec_type, file_type;
./system/sepolicy/prebuilts/api/33.0/private/file_contexts:233:/system/bin/extra_free_kbytes.sh u:object_r:extra_free_kbytes_exec:s0
./system/sepolicy/prebuilts/api/33.0/private/compat/31.0/31.0.ignore.cil:19: extra_free_kbytes_exec
./system/sepolicy/prebuilts/api/33.0/private/compat/32.0/32.0.ignore.cil:29: extra_free_kbytes_exec
./system/sepolicy/prebuilts/api/33.0/public/extra_free_kbytes.te:3:type extra_free_kbytes_exec, system_file_type, exec_type, file_type;
错误二
[ 76% 19/25] build out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/treble_sepolicy_tests_28.0
FAILED: out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/treble_sepolicy_tests_28.0
/bin/bash -c "(out/host/linux-x86/bin/treble_sepolicy_tests -f out/target/product/qssi/system/etc/selinux/plat_file_contexts -f out/target/product/qssi/vendor/etc/selinux/vendor_file_contexts -f out/target/product/qssi/system_ext/etc/selinux/system_ext_file_contexts -f out/target/product/qssi/product/etc/selinux/product_file_contexts -b out/target/product/qssi/obj/ETC/base_plat_sepolicy_intermediates/base_plat_sepolicy -m out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/28.0_mapping.combined.cil -o out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/built_28.0_plat_sepolicy -p out/target/product/qssi/obj/ETC/precompiled_sepolicy_intermediates/precompiled_sepolicy -u out/target/product/qssi/obj/ETC/base_plat_pub_policy.cil_intermediates/base_plat_pub_policy.cil --fake-treble ) && (touch out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/treble_sepolicy_tests_28.0 )"
/home/LA.QSSI.13.0.R1/out/soong/.temp/Soong.python_cq0z3hcd/treble_sepolicy_tests.py:23: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
import distutils.ccompiler
Unrecognized entrypoint for wallpaper at /oem/bin/wallpaper\.sh
SELinux: The following public types were found added to the policy without an entry into the compatibility mapping file(s) found in private/compat/V.v/V.v[.ignore].cil, where V.v is the latest API level.
wallpaper wallpaper_exec
See examples of how to fix this:
https://android-review.googlesource.com/c/platform/system/sepolicy/+/781036
https://android-review.googlesource.com/c/platform/system/sepolicy/+/852612
解决办法在 31.0.ignore.cil 和 32.0.ignore.cil 中增加 wallpaper wallpaper_exec
错误三
[ 76% 19/25] build out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/treble_sepolicy_tests_28.0
FAILED: out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/treble_sepolicy_tests_28.0
/bin/bash -c "(out/host/linux-x86/bin/treble_sepolicy_tests -f out/target/product/qssi/system/etc/selinux/plat_file_contexts -f out/target/product/qssi/vendor/etc/selinux/vendor_file_contexts -f out/target/product/qssi/system_ext/etc/selinux/system_ext_file_contexts -f out/target/product/qssi/product/etc/selinux/product_file_contexts -b out/target/product/qssi/obj/ETC/base_plat_sepolicy_intermediates/base_plat_sepolicy -m out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/28.0_mapping.combined.cil -o out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/built_28.0_plat_sepolicy -p out/target/product/qssi/obj/ETC/precompiled_sepolicy_intermediates/precompiled_sepolicy -u out/target/product/qssi/obj/ETC/base_plat_pub_policy.cil_intermediates/base_plat_pub_policy.cil --fake-treble ) && (touch out/target/product/qssi/obj/FAKE/treble_sepolicy_tests_28.0_intermediates/treble_sepolicy_tests_28.0 )"
/home/LA.QSSI.13.0.R1/out/soong/.temp/Soong.python_cq0z3hcd/treble_sepolicy_tests.py:23: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
import distutils.ccompiler
Unrecognized entrypoint for wallpaper at /oem/bin/wallpaper\.sh
最坑就是这个错误，一直查不到原因，隔了两天看了错误二中有 See examples of how to fix this 网址提示，去看了看，发现了一个文件 file_contexts_asan
把 /oem/bin/wallpaper.sh u:object_r:wallpaper_exec:s0 从 file_contexts 移动到 file_contexts_asan 中，编译错误解决。
system/core/rootdir/init.rc
on property:persist.test.wallpaper=1
start setwallpaper
service setwallpaper /system/bin/sh /oem/bin/wallpaper.sh
class main
oneshot
seclabel u:object_r:wallpaper_exec:s0
system/sepolicy/private/file_contexts_asan
/oem/bin/wallpaper\.sh u:object_r:wallpaper_exec:s0
system/sepolicy/private/wallpaper.te
typeattribute wallpaper coredomain;
init_daemon_domain(wallpaper)
system/sepolicy/private/compat/31.0/31.0.ignore.cil
system/sepolicy/private/compat/32.0/32.0.ignore.cil
extra_free_kbytes
extra_free_kbytes_exec
wallpaper
wallpaper_exec
framework_status_prop
system/sepolicy/public/wallpaper.te
# The wallpaper.sh script run by init.
type wallpaper, domain;
type wallpaper_exec, system_file_type, exec_type, file_type;