init.rc revision 933bc0a3d12e24cc2845507dd70d7c5d1cbe28c5 
1# Copyright (C) 2012 The Android Open Source Project
2#
3# IMPORTANT: Do not create world writable files or directories.
4# This is a common source of Android security bugs.
5#
6
7import /init.environ.rc
8import /init.usb.rc
9import /init.${ro.hardware}.rc
10import /init.${ro.zygote}.rc
11
12on early-init
13    # Set init and its forked children's oom_adj.
14    write /proc/1/oom_score_adj -1000
15
16    # Disable sysrq from keyboard
17    write /proc/sys/kernel/sysrq 0
18
19    # Set the security context of /adb_keys if present.
20    restorecon /adb_keys
21
22    # Shouldn't be necessary, but sdcard won't start without it. http://b/22568628.
23    mkdir /mnt 0775 root system
24
25    start ueventd
26
27on init
28    sysclktz 0
29
30    # Backward compatibility.
31    symlink /system/etc /etc
32    symlink /sys/kernel/debug /d
33
34    # Link /vendor to /system/vendor for devices without a vendor partition.
35    symlink /system/vendor /vendor
36
37    # Mount cgroup mount point for cpu accounting
38    mount cgroup none /acct cpuacct
39    mkdir /acct/uid
40
41    # Create cgroup mount point for memory
42    mount tmpfs none /sys/fs/cgroup mode=0750,uid=0,gid=1000
43    mkdir /sys/fs/cgroup/memory 0750 root system
44    mount cgroup none /sys/fs/cgroup/memory memory
45    write /sys/fs/cgroup/memory/memory.move_charge_at_immigrate 1
46    chown root system /sys/fs/cgroup/memory/tasks
47    chmod 0660 /sys/fs/cgroup/memory/tasks
48    mkdir /sys/fs/cgroup/memory/sw 0750 root system
49    write /sys/fs/cgroup/memory/sw/memory.swappiness 100
50    write /sys/fs/cgroup/memory/sw/memory.move_charge_at_immigrate 1
51    chown root system /sys/fs/cgroup/memory/sw/tasks
52    chmod 0660 /sys/fs/cgroup/memory/sw/tasks
53
54    # Mount staging areas for devices managed by vold
55    # See storage config details at http://source.android.com/tech/storage/
56    mount tmpfs tmpfs /mnt mode=0755,uid=0,gid=1000
57    restorecon_recursive /mnt
58
59    mkdir /mnt/secure 0700 root root
60    mkdir /mnt/secure/asec 0700 root root
61    mkdir /mnt/asec 0755 root system
62    mkdir /mnt/obb 0755 root system
63    mkdir /mnt/media_rw 0750 root media_rw
64    mkdir /mnt/user 0755 root root
65    mkdir /mnt/user/0 0755 root root
66    mkdir /mnt/expand 0771 system system
67
68    # Storage views to support runtime permissions
69    mkdir /storage 0755 root root
70    mkdir /mnt/runtime 0700 root root
71    mkdir /mnt/runtime/default 0755 root root
72    mkdir /mnt/runtime/default/self 0755 root root
73    mkdir /mnt/runtime/read 0755 root root
74    mkdir /mnt/runtime/read/self 0755 root root
75    mkdir /mnt/runtime/write 0755 root root
76    mkdir /mnt/runtime/write/self 0755 root root
77
78    # Symlink to keep legacy apps working in multi-user world
79    symlink /storage/self/primary /sdcard
80    symlink /mnt/user/0/primary /mnt/runtime/default/self/primary
81
82    # memory control cgroup
83    mkdir /dev/memcg 0700 root system
84    mount cgroup none /dev/memcg memory
85
86    write /proc/sys/kernel/panic_on_oops 1
87    write /proc/sys/kernel/hung_task_timeout_secs 0
88    write /proc/cpu/alignment 4
89    write /proc/sys/kernel/sched_latency_ns 10000000
90    write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000
91    write /proc/sys/kernel/sched_compat_yield 1
92    write /proc/sys/kernel/sched_child_runs_first 0
93    write /proc/sys/kernel/randomize_va_space 2
94    write /proc/sys/kernel/kptr_restrict 2
95    write /proc/sys/vm/mmap_min_addr 32768
96    write /proc/sys/net/ipv4/ping_group_range "0 2147483647"
97    write /proc/sys/net/unix/max_dgram_qlen 600
98    write /proc/sys/kernel/sched_rt_runtime_us 950000
99    write /proc/sys/kernel/sched_rt_period_us 1000000
100
101    # reflect fwmark from incoming packets onto generated replies
102    write /proc/sys/net/ipv4/fwmark_reflect 1
103    write /proc/sys/net/ipv6/fwmark_reflect 1
104
105    # set fwmark on accepted sockets
106    write /proc/sys/net/ipv4/tcp_fwmark_accept 1
107
108    # disable icmp redirects
109    write /proc/sys/net/ipv4/conf/all/accept_redirects 0
110    write /proc/sys/net/ipv6/conf/all/accept_redirects 0
111
112    # Create cgroup mount points for process groups
113    mkdir /dev/cpuctl
114    mount cgroup none /dev/cpuctl cpu
115    chown system system /dev/cpuctl
116    chown system system /dev/cpuctl/tasks
117    chmod 0666 /dev/cpuctl/tasks
118    write /dev/cpuctl/cpu.shares 1024
119    write /dev/cpuctl/cpu.rt_runtime_us 800000
120    write /dev/cpuctl/cpu.rt_period_us 1000000
121
122    mkdir /dev/cpuctl/bg_non_interactive
123    chown system system /dev/cpuctl/bg_non_interactive/tasks
124    chmod 0666 /dev/cpuctl/bg_non_interactive/tasks
125    # 5.0 %
126    write /dev/cpuctl/bg_non_interactive/cpu.shares 52
127    write /dev/cpuctl/bg_non_interactive/cpu.rt_runtime_us 700000
128    write /dev/cpuctl/bg_non_interactive/cpu.rt_period_us 1000000
129
130    # sets up initial cpusets for ActivityManager
131    mkdir /dev/cpuset
132    mount cpuset none /dev/cpuset
133    mkdir /dev/cpuset/foreground
134    mkdir /dev/cpuset/background
135    # this ensures that the cpusets are present and usable, but the device's
136    # init.rc must actually set the correct cpus
137    write /dev/cpuset/foreground/cpus 0
138    write /dev/cpuset/background/cpus 0
139    write /dev/cpuset/foreground/mems 0
140    write /dev/cpuset/background/mems 0
141    chown system system /dev/cpuset
142    chown system system /dev/cpuset/foreground
143    chown system system /dev/cpuset/background
144    chown system system /dev/cpuset/tasks
145    chown system system /dev/cpuset/foreground/tasks
146    chown system system /dev/cpuset/background/tasks
147    chmod 0664 /dev/cpuset/foreground/tasks
148    chmod 0664 /dev/cpuset/background/tasks
149    chmod 0664 /dev/cpuset/tasks
150
151
152    # qtaguid will limit access to specific data based on group memberships.
153    #   net_bw_acct grants impersonation of socket owners.
154    #   net_bw_stats grants access to other apps' detailed tagged-socket stats.
155    chown root net_bw_acct /proc/net/xt_qtaguid/ctrl
156    chown root net_bw_stats /proc/net/xt_qtaguid/stats
157
158    # Allow everybody to read the xt_qtaguid resource tracking misc dev.
159    # This is needed by any process that uses socket tagging.
160    chmod 0644 /dev/xt_qtaguid
161
162    # Create location for fs_mgr to store abbreviated output from filesystem
163    # checker programs.
164    mkdir /dev/fscklogs 0770 root system
165
166    # pstore/ramoops previous console log
167    mount pstore pstore /sys/fs/pstore
168    chown system log /sys/fs/pstore/console-ramoops
169    chmod 0440 /sys/fs/pstore/console-ramoops
170    chown system log /sys/fs/pstore/pmsg-ramoops-0
171    chmod 0440 /sys/fs/pstore/pmsg-ramoops-0
172
173    # enable armv8_deprecated instruction hooks
174    write /proc/sys/abi/swp 1
175
176# Healthd can trigger a full boot from charger mode by signaling this
177# property when the power button is held.
178on property:sys.boot_from_charger_mode=1
179    class_stop charger
180    trigger late-init
181
182# Load properties from /system/ + /factory after fs mount.
183on load_all_props_action
184    load_all_props
185    start logd
186    start logd-reinit
187
188# Indicate to fw loaders that the relevant mounts are up.
189on firmware_mounts_complete
190    rm /dev/.booting
191
192# Mount filesystems and start core system services.
193on late-init
194    trigger early-fs
195    trigger fs
196    trigger post-fs
197    trigger post-fs-data
198
199    # Load properties from /system/ + /factory after fs mount. Place
200    # this in another action so that the load will be scheduled after the prior
201    # issued fs triggers have completed.
202    trigger load_all_props_action
203
204    # Remove a file to wake up anything waiting for firmware.
205    trigger firmware_mounts_complete
206
207    trigger early-boot
208    trigger boot
209
210
211on post-fs
212    start logd
213    # once everything is setup, no need to modify /
214    mount rootfs rootfs / ro remount
215    # Mount shared so changes propagate into child namespaces
216    mount rootfs rootfs / shared rec
217    # Mount default storage into root namespace
218    mount none /mnt/runtime/default /storage slave bind rec
219
220    # We chown/chmod /cache again so because mount is run as root + defaults
221    chown system cache /cache
222    chmod 0770 /cache
223    # We restorecon /cache in case the cache partition has been reset.
224    restorecon_recursive /cache
225
226    # Create /cache/recovery in case it's not there. It'll also fix the odd
227    # permissions if created by the recovery system.
228    mkdir /cache/recovery 0770 system cache
229
230    #change permissions on vmallocinfo so we can grab it from bugreports
231    chown root log /proc/vmallocinfo
232    chmod 0440 /proc/vmallocinfo
233
234    chown root log /proc/slabinfo
235    chmod 0440 /proc/slabinfo
236
237    #change permissions on kmsg & sysrq-trigger so bugreports can grab kthread stacks
238    chown root system /proc/kmsg
239    chmod 0440 /proc/kmsg
240    chown root system /proc/sysrq-trigger
241    chmod 0220 /proc/sysrq-trigger
242    chown system log /proc/last_kmsg
243    chmod 0440 /proc/last_kmsg
244
245    # make the selinux kernel policy world-readable
246    chmod 0444 /sys/fs/selinux/policy
247
248    # create the lost+found directories, so as to enforce our permissions
249    mkdir /cache/lost+found 0770 root root
250
251on post-fs-data
252    # We chown/chmod /data again so because mount is run as root + defaults
253    chown system system /data
254    chmod 0771 /data
255    # We restorecon /data in case the userdata partition has been reset.
256    restorecon /data
257
258    # Make sure we have the device encryption key
259    start logd
260    start vold
261    installkey /data
262
263    # Emulated internal storage area
264    mkdir /data/media 0770 media_rw media_rw
265    # Start bootcharting as soon as possible after the data partition is
266    # mounted to collect more data.
267    mkdir /data/bootchart 0755 shell shell
268    bootchart_init
269
270    # Avoid predictable entropy pool. Carry over entropy from previous boot.
271    copy /data/system/entropy.dat /dev/urandom
272
273    # create basic filesystem structure
274    mkdir /data/misc 01771 system misc
275    mkdir /data/misc/bluedroid 02770 bluetooth net_bt_stack
276    # Fix the access permissions and group ownership for 'bt_config.conf'
277    chmod 0660 /data/misc/bluedroid/bt_config.conf
278    chown bluetooth net_bt_stack /data/misc/bluedroid/bt_config.conf
279    mkdir /data/misc/bluetooth 0770 system system
280    mkdir /data/misc/keystore 0700 keystore keystore
281    mkdir /data/misc/gatekeeper 0700 system system
282    mkdir /data/misc/keychain 0771 system system
283    mkdir /data/misc/net 0750 root shell
284    mkdir /data/misc/radio 0770 system radio
285    mkdir /data/misc/sms 0770 system radio
286    mkdir /data/misc/zoneinfo 0775 system system
287    mkdir /data/misc/vpn 0770 system vpn
288    mkdir /data/misc/shared_relro 0771 shared_relro shared_relro
289    mkdir /data/misc/systemkeys 0700 system system
290    mkdir /data/misc/wifi 0770 wifi wifi
291    mkdir /data/misc/wifi/sockets 0770 wifi wifi
292    mkdir /data/misc/wifi/wpa_supplicant 0770 wifi wifi
293    mkdir /data/misc/ethernet 0770 system system
294    mkdir /data/misc/dhcp 0770 dhcp dhcp
295    mkdir /data/misc/user 0771 root root
296    mkdir /data/misc/perfprofd 0775 root root
297    # give system access to wpa_supplicant.conf for backup and restore
298    chmod 0660 /data/misc/wifi/wpa_supplicant.conf
299    mkdir /data/local 0751 root root
300    mkdir /data/misc/media 0700 media media
301    mkdir /data/misc/boottrace 0771 system shell
302    mkdir /data/misc/update_engine 0700 root root
303
304    # For security reasons, /data/local/tmp should always be empty.
305    # Do not place files or directories in /data/local/tmp
306    mkdir /data/local/tmp 0771 shell shell
307    mkdir /data/data 0771 system system
308    mkdir /data/app-private 0771 system system
309    mkdir /data/app-asec 0700 root root
310    mkdir /data/app-lib 0771 system system
311    mkdir /data/app 0771 system system
312    mkdir /data/property 0700 root root
313    mkdir /data/tombstones 0771 system system
314
315    # create dalvik-cache, so as to enforce our permissions
316    mkdir /data/dalvik-cache 0771 root root
317
318    # create resource-cache and double-check the perms
319    mkdir /data/resource-cache 0771 system system
320    chown system system /data/resource-cache
321    chmod 0771 /data/resource-cache
322
323    # create the lost+found directories, so as to enforce our permissions
324    mkdir /data/lost+found 0770 root root
325
326    # create directory for DRM plug-ins - give drm the read/write access to
327    # the following directory.
328    mkdir /data/drm 0770 drm drm
329
330    # create directory for MediaDrm plug-ins - give drm the read/write access to
331    # the following directory.
332    mkdir /data/mediadrm 0770 mediadrm mediadrm
333
334    mkdir /data/anr 0775 system system
335
336    # symlink to bugreport storage location
337    symlink /data/data/com.android.shell/files/bugreports /data/bugreports
338
339    # Separate location for storing security policy files on data
340    mkdir /data/security 0711 system system
341
342    # Create all remaining /data root dirs so that they are made through init
343    # and get proper encryption policy installed
344    mkdir /data/backup 0700 system system
345    mkdir /data/media 0770 media_rw media_rw
346    mkdir /data/ss 0700 system system
347    mkdir /data/system 0775 system system
348    mkdir /data/system/heapdump 0700 system system
349    mkdir /data/user 0711 system system
350
351    # Reload policy from /data/security if present.
352    setprop selinux.reload_policy 1
353
354    # Set SELinux security contexts on upgrade or policy update.
355    restorecon_recursive /data
356
357    # Check any timezone data in /data is newer than the copy in /system, delete if not.
358    exec - system system -- /system/bin/tzdatacheck /system/usr/share/zoneinfo /data/misc/zoneinfo
359
360    # If there is no fs-post-data action in the init.<device>.rc file, you
361    # must uncomment this line, otherwise encrypted filesystems
362    # won't work.
363    # Set indication (checked by vold) that we have finished this action
364    #setprop vold.post_fs_data_done 1
365
366on boot
367    # basic network init
368    ifup lo
369    hostname localhost
370    domainname localdomain
371
372    # set RLIMIT_NICE to allow priorities from 19 to -20
373    setrlimit 13 40 40
374
375    # Memory management.  Basic kernel parameters, and allow the high
376    # level system server to be able to adjust the kernel OOM driver
377    # parameters to match how it is managing things.
378    write /proc/sys/vm/overcommit_memory 1
379    write /proc/sys/vm/min_free_order_shift 4
380    chown root system /sys/module/lowmemorykiller/parameters/adj
381    chmod 0664 /sys/module/lowmemorykiller/parameters/adj
382    chown root system /sys/module/lowmemorykiller/parameters/minfree
383    chmod 0664 /sys/module/lowmemorykiller/parameters/minfree
384
385    # Tweak background writeout
386    write /proc/sys/vm/dirty_expire_centisecs 200
387    write /proc/sys/vm/dirty_background_ratio  5
388
389    # Permissions for System Server and daemons.
390    chown radio system /sys/android_power/state
391    chown radio system /sys/android_power/request_state
392    chown radio system /sys/android_power/acquire_full_wake_lock
393    chown radio system /sys/android_power/acquire_partial_wake_lock
394    chown radio system /sys/android_power/release_wake_lock
395    chown system system /sys/power/autosleep
396    chown system system /sys/power/state
397    chown system system /sys/power/wakeup_count
398    chown radio system /sys/power/wake_lock
399    chown radio system /sys/power/wake_unlock
400    chmod 0660 /sys/power/state
401    chmod 0660 /sys/power/wake_lock
402    chmod 0660 /sys/power/wake_unlock
403
404    chown system system /sys/devices/system/cpu/cpufreq/interactive/timer_rate
405    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/timer_rate
406    chown system system /sys/devices/system/cpu/cpufreq/interactive/timer_slack
407    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/timer_slack
408    chown system system /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
409    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
410    chown system system /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
411    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
412    chown system system /sys/devices/system/cpu/cpufreq/interactive/target_loads
413    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/target_loads
414    chown system system /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
415    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
416    chown system system /sys/devices/system/cpu/cpufreq/interactive/above_hispeed_delay
417    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/above_hispeed_delay
418    chown system system /sys/devices/system/cpu/cpufreq/interactive/boost
419    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/boost
420    chown system system /sys/devices/system/cpu/cpufreq/interactive/boostpulse
421    chown system system /sys/devices/system/cpu/cpufreq/interactive/input_boost
422    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/input_boost
423    chown system system /sys/devices/system/cpu/cpufreq/interactive/boostpulse_duration
424    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/boostpulse_duration
425    chown system system /sys/devices/system/cpu/cpufreq/interactive/io_is_busy
426    chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/io_is_busy
427
428    # Assume SMP uses shared cpufreq policy for all CPUs
429    chown system system /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
430    chmod 0660 /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
431
432    chown system system /sys/class/timed_output/vibrator/enable
433    chown system system /sys/class/leds/keyboard-backlight/brightness
434    chown system system /sys/class/leds/lcd-backlight/brightness
435    chown system system /sys/class/leds/button-backlight/brightness
436    chown system system /sys/class/leds/jogball-backlight/brightness
437    chown system system /sys/class/leds/red/brightness
438    chown system system /sys/class/leds/green/brightness
439    chown system system /sys/class/leds/blue/brightness
440    chown system system /sys/class/leds/red/device/grpfreq
441    chown system system /sys/class/leds/red/device/grppwm
442    chown system system /sys/class/leds/red/device/blink
443    chown system system /sys/class/timed_output/vibrator/enable
444    chown system system /sys/module/sco/parameters/disable_esco
445    chown system system /sys/kernel/ipv4/tcp_wmem_min
446    chown system system /sys/kernel/ipv4/tcp_wmem_def
447    chown system system /sys/kernel/ipv4/tcp_wmem_max
448    chown system system /sys/kernel/ipv4/tcp_rmem_min
449    chown system system /sys/kernel/ipv4/tcp_rmem_def
450    chown system system /sys/kernel/ipv4/tcp_rmem_max
451    chown root radio /proc/cmdline
452
453    # Define default initial receive window size in segments.
454    setprop net.tcp.default_init_rwnd 60
455
456    class_start core
457
458on nonencrypted
459    class_start main
460    class_start late_start
461
462on property:vold.decrypt=trigger_default_encryption
463    start defaultcrypto
464
465on property:vold.decrypt=trigger_encryption
466    start surfaceflinger
467    start encrypt
468
469on property:sys.init_log_level=*
470    loglevel ${sys.init_log_level}
471
472on charger
473    class_start charger
474
475on property:vold.decrypt=trigger_reset_main
476    class_reset main
477
478on property:vold.decrypt=trigger_load_persist_props
479    load_persist_props
480    start logd
481    start logd-reinit
482
483on property:vold.decrypt=trigger_post_fs_data
484    trigger post-fs-data
485
486on property:vold.decrypt=trigger_restart_min_framework
487    class_start main
488
489on property:vold.decrypt=trigger_restart_framework
490    class_start main
491    class_start late_start
492
493on property:vold.decrypt=trigger_shutdown_framework
494    class_reset late_start
495    class_reset main
496
497on property:sys.powerctl=*
498    powerctl ${sys.powerctl}
499
500# system server cannot write to /proc/sys files,
501# and chown/chmod does not work for /proc/sys/ entries.
502# So proxy writes through init.
503on property:sys.sysctl.extra_free_kbytes=*
504    write /proc/sys/vm/extra_free_kbytes ${sys.sysctl.extra_free_kbytes}
505
506# "tcp_default_init_rwnd" Is too long!
507on property:sys.sysctl.tcp_def_init_rwnd=*
508    write /proc/sys/net/ipv4/tcp_default_init_rwnd ${sys.sysctl.tcp_def_init_rwnd}
509
510
511## Daemon processes to be run by init.
512##
513service ueventd /sbin/ueventd
514    class core
515    critical
516    seclabel u:r:ueventd:s0
517
518service healthd /sbin/healthd
519    class core
520    critical
521    seclabel u:r:healthd:s0
522    group root system
523
524service console /system/bin/sh
525    class core
526    console
527    disabled
528    user shell
529    group shell log
530    seclabel u:r:shell:s0
531
532on property:ro.debuggable=1
533    start console
534
535service flash_recovery /system/bin/install-recovery.sh
536    class main
537    oneshot
538