1# installer daemon
2type installd, domain;
3type installd_exec, exec_type, file_type;
4
5init_daemon_domain(installd)
6typeattribute installd mlstrustedsubject;
7allow installd self:capability { chown dac_override fowner fsetid setgid setuid };
8
9# Allow labeling of files under /data/app/com.example/oat/
10allow installd dalvikcache_data_file:dir relabelto;
11allow installd dalvikcache_data_file:file { relabelto link };
12
13# Allow movement of APK files between volumes
14allow installd apk_data_file:dir { create_dir_perms relabelfrom };
15allow installd apk_data_file:file { create_file_perms relabelfrom link };
16allow installd apk_data_file:lnk_file { create read unlink };
17
18allow installd asec_apk_file:file r_file_perms;
19allow installd apk_tmp_file:file { r_file_perms unlink };
20allow installd apk_tmp_file:dir { relabelfrom create_dir_perms };
21allow installd oemfs:dir r_dir_perms;
22allow installd oemfs:file r_file_perms;
23allow installd system_file:file x_file_perms;
24allow installd cgroup:dir create_dir_perms;
25allow installd mnt_expand_file:dir { search getattr };
26# Check validity of SELinux context before use.
27selinux_check_context(installd)
28# Read /seapp_contexts and /data/security/seapp_contexts
29security_access_policy(installd)
30
31# Search /data/app-asec and stat files in it.
32allow installd asec_image_file:dir search;
33allow installd asec_image_file:file getattr;
34
35# Create /data/user and /data/user/0 if necessary.
36# Also required to initially create /data/data subdirectories
37# and lib symlinks before the setfilecon call.  May want to
38# move symlink creation after setfilecon in installd.
39allow installd system_data_file:dir create_dir_perms;
40allow installd system_data_file:lnk_file { create setattr unlink };
41
42# Upgrade /data/media for multi-user if necessary.
43allow installd media_rw_data_file:dir create_dir_perms;
44allow installd media_rw_data_file:file { getattr unlink };
45# restorecon new /data/media directory.
46allow installd system_data_file:dir relabelfrom;
47allow installd media_rw_data_file:dir relabelto;
48
49# Upgrade /data/misc/keychain for multi-user if necessary.
50allow installd misc_user_data_file:dir create_dir_perms;
51allow installd misc_user_data_file:file create_file_perms;
52allow installd keychain_data_file:dir create_dir_perms;
53allow installd keychain_data_file:file {r_file_perms unlink};
54
55# Create /data/.layout_version.* file
56type_transition installd system_data_file:file install_data_file;
57allow installd install_data_file:file create_file_perms;
58
59# Create files under /data/dalvik-cache.
60allow installd dalvikcache_data_file:dir create_dir_perms;
61allow installd dalvikcache_data_file:file create_file_perms;
62
63# Create /data/dalvik-cache/profiles.
64allow installd dalvikcache_profiles_data_file:dir rw_dir_perms;
65allow installd dalvikcache_profiles_data_file:file create_file_perms;
66
67# Create files under /data/resource-cache.
68allow installd resourcecache_data_file:dir rw_dir_perms;
69allow installd resourcecache_data_file:file create_file_perms;
70
71# Run dex2oat in its own sandbox.
72domain_auto_trans(installd, dex2oat_exec, dex2oat)
73
74# Upgrade from unlabeled userdata.
75# Just need enough to remove and/or relabel it.
76allow installd unlabeled:dir { getattr search relabelfrom rw_dir_perms rmdir };
77allow installd unlabeled:notdevfile_class_set { getattr relabelfrom rename unlink setattr };
78# Read pkg.apk file for input during dexopt.
79allow installd unlabeled:file r_file_perms;
80
81# Upgrade from before system_app_data_file was used for system UID apps.
82# Just need enough to relabel it and to unlink removed package files.
83# Directory access covered by earlier rule above.
84allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink };
85
86# Manage /data/data subdirectories, including initially labeling them
87# upon creation via setfilecon or running restorecon_recursive,
88# setting owner/mode, creating symlinks within them, and deleting them
89# upon package uninstall.
90# Types extracted from seapp_contexts type= fields.
91allow 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 };
92allow 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 };
93
94# Create and use pty created by android_fork_execvp().
95allow installd devpts:chr_file rw_file_perms;
96