platform_system_sepolicy/installd.te

# installer daemon
type installd, domain;
type installd_exec, exec_type, file_type;

init_daemon_domain(installd)
typeattribute installd mlstrustedsubject;
allow installd self:capability { chown dac_override fowner fsetid setgid setuid };

# Allow labeling of files under /data/app/com.example/oat/
allow installd dalvikcache_data_file:dir relabelto;
allow installd dalvikcache_data_file:file relabelto;

# Allow movement of APK files between volumes
allow installd apk_data_file:dir { create_dir_perms relabelfrom };
allow installd apk_data_file:file { create_file_perms relabelfrom };
allow installd apk_data_file:lnk_file { create read unlink };

allow installd asec_apk_file:file r_file_perms;
allow installd apk_tmp_file:file { r_file_perms unlink };
allow installd apk_tmp_file:dir { relabelfrom create_dir_perms };
allow installd oemfs:dir r_dir_perms;
allow installd oemfs:file r_file_perms;
allow installd system_file:file x_file_perms;
allow installd cgroup:dir create_dir_perms;
allow installd mnt_expand_file:dir search;
# Check validity of SELinux context before use.
selinux_check_context(installd)
# Read /seapp_contexts and /data/security/seapp_contexts
security_access_policy(installd)

# Search /data/app-asec and stat files in it.
allow installd asec_image_file:dir search;
allow installd asec_image_file:file getattr;

# Create /data/user and /data/user/0 if necessary.
# Also required to initially create /data/data subdirectories
# and lib symlinks before the setfilecon call.  May want to
# move symlink creation after setfilecon in installd.
allow installd system_data_file:dir create_dir_perms;
allow installd system_data_file:lnk_file { create setattr unlink };

# Upgrade /data/media for multi-user if necessary.
allow installd media_rw_data_file:dir create_dir_perms;
allow installd media_rw_data_file:file { getattr unlink };
# restorecon new /data/media directory.
allow installd system_data_file:dir relabelfrom;
allow installd media_rw_data_file:dir relabelto;

# Upgrade /data/misc/keychain for multi-user if necessary.
allow installd misc_user_data_file:dir create_dir_perms;
allow installd misc_user_data_file:file create_file_perms;
allow installd keychain_data_file:dir create_dir_perms;
allow installd keychain_data_file:file {r_file_perms unlink};

# Create /data/.layout_version.* file
type_transition installd system_data_file:file install_data_file;
allow installd install_data_file:file create_file_perms;

# Create files under /data/dalvik-cache.
allow installd dalvikcache_data_file:dir create_dir_perms;
allow installd dalvikcache_data_file:file create_file_perms;

# Create /data/dalvik-cache/profiles.
allow installd dalvikcache_profiles_data_file:dir rw_dir_perms;
allow installd dalvikcache_profiles_data_file:file create_file_perms;

# Create files under /data/resource-cache.
allow installd resourcecache_data_file:dir rw_dir_perms;
allow installd resourcecache_data_file:file create_file_perms;

# Run dex2oat in its own sandbox.
domain_auto_trans(installd, dex2oat_exec, dex2oat)

# Upgrade from unlabeled userdata.
# Just need enough to remove and/or relabel it.
allow installd unlabeled:dir { getattr search relabelfrom rw_dir_perms rmdir };
allow installd unlabeled:notdevfile_class_set { getattr relabelfrom rename unlink setattr };
# Read pkg.apk file for input during dexopt.
allow installd unlabeled:file r_file_perms;

# Upgrade from before system_app_data_file was used for system UID apps.
# Just need enough to relabel it and to unlink removed package files.
# Directory access covered by earlier rule above.
allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink };

# Manage /data/data subdirectories, including initially labeling them
# upon creation via setfilecon or running restorecon_recursive,
# setting owner/mode, creating symlinks within them, and deleting them
# upon package uninstall.
# Types extracted from seapp_contexts type= fields.
allow installd { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:dir { create_dir_perms relabelfrom relabelto };
allow installd { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:notdevfile_class_set { create_file_perms relabelfrom relabelto };

# Create and use pty created by android_fork_execvp().
allow installd devpts:chr_file rw_file_perms;