Seth/device_amazon_mt8127-common
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8c77dc852534890a237d6f8e3751e4d9d1d915f3
device_amazon_mt8127-common/rootdir/factory_init.rc
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ggow 8c77dc8525 Flatten rootdir
2019-04-23 11:41:28 +01:00

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#connectivity related init script
import factory_init.project.rc
import /init.environ.rc
import init.ssd.rc
import init.no_ssd.rc
import init.ssd_nomuser.rc
import init.fon.rc
on early-init
# Set init and its forked children's oom_adj.
write /proc/1/oom_score_adj -1000
# Apply strict SELinux checking of PROT_EXEC on mmap/mprotect calls.
write /sys/fs/selinux/checkreqprot 0
# Set the security context for the init process.
# This should occur before anything else (e.g. ueventd) is started.
setcon u:r:init:s0
# Set the security context of /adb_keys if present.
restorecon /adb_keys
start ueventd
write /proc/bootprof "INIT: usr/eng build setting"
# create mountpoints
mkdir /mnt 0775 root system
on init
sysclktz 0
loglevel 5
# Backward compatibility
symlink /system/etc /etc
symlink /sys/kernel/debug /d
# Right now vendor lives on the same filesystem as system,
# but someday that may change.
symlink /system/vendor /vendor
# Create cgroup mount point for cpu accounting
mkdir /acct
mount cgroup none /acct cpuacct
mkdir /acct/uid
# Backwards Compat - XXX: Going away in G*
symlink /mnt/sdcard /sdcard
mkdir /system
mkdir /data 0771 system system
mkdir /cache 0770 system cache
mkdir /config 0500 root root
# See storage config details at http://source.android.com/tech/storage/
mkdir /mnt/shell 0700 shell shell
mkdir /mnt/media_rw 0700 media_rw media_rw
mkdir /storage 0751 root sdcard_r
# Directory for putting things only root should see.
mkdir /mnt/secure 0700 root root
# Create private mountpoint so we can MS_MOVE from staging
mount tmpfs tmpfs /mnt/secure mode=0700,uid=0,gid=0
# Directory for staging bindmounts
mkdir /mnt/secure/staging 0700 root root
# Directory-target for where the secure container
# imagefile directory will be bind-mounted
mkdir /mnt/secure/asec 0700 root root
# Secure container public mount points.
mkdir /mnt/asec 0700 root system
mount tmpfs tmpfs /mnt/asec mode=0755,gid=1000
# Filesystem image public mount points.
mkdir /mnt/obb 0700 root system
mount tmpfs tmpfs /mnt/obb mode=0755,gid=1000
write /proc/sys/kernel/panic_on_oops 1
write /proc/sys/kernel/hung_task_timeout_secs 0
write /proc/cpu/alignment 4
write /proc/sys/kernel/sched_latency_ns 10000000
write /proc/sys/kernel/sched_wakeup_granularity_ns 2000000
write /proc/sys/kernel/sched_compat_yield 1
write /proc/sys/kernel/sched_child_runs_first 0
write /proc/sys/kernel/randomize_va_space 2
write /proc/sys/kernel/kptr_restrict 2
write /proc/sys/kernel/dmesg_restrict 1
write /proc/sys/vm/mmap_min_addr 32768
write /proc/sys/kernel/sched_rt_runtime_us 950000
write /proc/sys/kernel/sched_rt_period_us 1000000
# change key_provisioning
mkdir /data/key_provisioning
chmod 0777 /data/key_provisioning
mkdir /dev/cpuctl
mount cgroup none /dev/cpuctl cpu
chown system system /dev/cpuctl
chown system system /dev/cpuctl/tasks
chmod 0660 /dev/cpuctl/tasks
write /dev/cpuctl/cpu.shares 1024
write /dev/cpuctl/cpu.rt_runtime_us 950000
write /dev/cpuctl/cpu.rt_period_us 1000000
mkdir /dev/cpuctl/apps
chown system system /dev/cpuctl/apps/tasks
chmod 0666 /dev/cpuctl/apps/tasks
write /dev/cpuctl/apps/cpu.shares 1024
write /dev/cpuctl/apps/cpu.rt_runtime_us 800000
write /dev/cpuctl/apps/cpu.rt_period_us 1000000
#USB function for factory mode
# write /sys/class/android_usb/android0/enable 0
# write /sys/class/android_usb/android0/idVendor 0e8d
# write /sys/class/android_usb/android0/idProduct 2006
# write /sys/class/android_usb/android0/f_acm/instances 1
# write /sys/class/android_usb/android0/functions mass_storage,adb,acm
# write /sys/class/android_usb/android0/enable 1
# start adbd
# setprop sys.usb.state mass_storage,adb,acm
mkdir /dev/cpuctl/apps/bg_non_interactive
chown system system /dev/cpuctl/apps/bg_non_interactive/tasks
chmod 0666 /dev/cpuctl/apps/bg_non_interactive/tasks
# 5.0 %
write /dev/cpuctl/apps/bg_non_interactive/cpu.shares 52
write /dev/cpuctl/apps/bg_non_interactive/cpu.rt_runtime_us 700000
write /dev/cpuctl/apps/bg_non_interactive/cpu.rt_period_us 1000000
# Allow everybody to read the xt_qtaguid resource tracking misc dev.
# This is needed by any process that uses socket tagging.
chmod 0644 /dev/xt_qtaguid
# Healthd can trigger a full boot from charger mode by signaling this
# property when the power button is held.
on property:sys.boot_from_charger_mode=1
class_stop charger
trigger late-init
# Load properties from /system/ + /factory after fs mount.
on load_all_props_action
load_all_props
# Mount filesystems and start core system services.
on late-init
trigger early-fs
trigger fs
trigger post-fs
trigger post-fs-data
# Load properties from /system/ + /factory after fs mount. Place
# this in another action so that the load will be scheduled after the prior
# issued fs triggers have completed.
trigger load_all_props_action
trigger early-boot
trigger boot
on fs
write /proc/bootprof "INIT:Mount_START"
mount_all /fstab.mt8127
#change partition permissions
exec /system/bin/chmod 0640 /dev/block/platform/mtk-msdc.0/by-name/boot
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/boot
exec /system/bin/chmod 0640 /dev/block/platform/mtk-msdc.0/by-name/recovery
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/recovery
exec /system/bin/chmod 0640 /dev/block/platform/mtk-msdc.0/by-name/secro
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/secro
exec /system/bin/chmod 0660 /dev/block/platform/mtk-msdc.0/by-name/seccfg
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/seccfg
exec /system/bin/chmod 0660 /dev/block/platform/mtk-msdc.0/by-name/proinfo
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/proinfo
exec /system/bin/chmod 0660 /dev/block/platform/mtk-msdc.0/by-name/otp
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/otp
exec /system/bin/chmod 0660 /dev/block/platform/mtk-msdc.0/by-name/nvram
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/nvram
exec /system/bin/chmod 0660 /dev/block/platform/mtk-msdc.0/by-name/para
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/para
exec /system/bin/chmod 0660 /dev/block/platform/mtk-msdc.0/by-name/logo
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/logo
exec /system/bin/chown root:system /dev/block/platform/mtk-msdc.0/by-name/para
write /proc/bootprof "INIT:Mount_END"
on post-fs
# once everything is setup, no need to modify /
mount rootfs rootfs / ro remount
# mount shared so changes propagate into child namespaces
mount rootfs rootfs / shared rec
mount tmpfs tmpfs /mnt/secure private rec
# We chown/chmod /data again so because mount is run as root + defaults
chown system system /system/data
chmod 0777 /system/data
# Same reason as /data above
chown system cache /cache
chmod 0770 /cache
# We restorecon /cache in case the cache partition has been reset.
restorecon_recursive /cache
mkdir /cache/recovery 0770 system system
restorecon /cache
#mount yaffs2 mtd@nvram /nvram nandboot
mount ext4 /dev/block/platform/mtk-msdc.0/by-name/SEC_RO /system/secro
mount ext4 /dev/block/platform/mtk-msdc.0/by-name/SEC_RO /system/secro ro remount
# This may have been created by the recovery system with odd permissions
chown system cache /cache/recovery
chmod 0770 /cache/recovery
# This may have been created by the recovery system with the wrong context.
restorecon /cache/recovery
#change permissions on vmallocinfo so we can grab it from bugreports
chown root log /proc/vmallocinfo
chmod 0440 /proc/vmallocinfo
chown root log /proc/slabinfo
chmod 0440 /proc/slabinfo
#change permissions on kmsg & sysrq-trigger so bugreports can grab kthread stacks
chown root system /proc/kmsg
chmod 0440 /proc/kmsg
chown root system /proc/sysrq-trigger
chmod 0220 /proc/sysrq-trigger
chown system log /proc/last_kmsg
chmod 0440 /proc/last_kmsg
# create the lost+found directories, so as to enforce our permissions
mkdir /cache/lost+found 0770 root root
# make the selinux kernel policy world-readable
chmod 0444 /sys/fs/selinux/policy
# create the lost+found directories, so as to enforce our permissions
mkdir /cache/lost+found 0770 root root
#SeLinux
restorecon_recursive /protect_f
restorecon_recursive /protect_s
on post-fs-data
# We chown/chmod /data again so because mount is run as root + defaults
chown system system /data
chmod 0771 /data
# We restorecon /data in case the userdata partition has been reset.
restorecon /data
# Create dump dir and collect dumps.
# Do this before we mount cache so eventually we can use cache for
# storing dumps on platforms which do not have a dedicated dump partition.
mkdir /data/dontpanic 0750 root log
# Collect apanic data, free resources and re-arm trigger
copy /proc/apanic_console /data/dontpanic/apanic_console
chown root log /data/dontpanic/apanic_console
chmod 0640 /data/dontpanic/apanic_console
copy /proc/apanic_threads /data/dontpanic/apanic_threads
chown root log /data/dontpanic/apanic_threads
chmod 0640 /data/dontpanic/apanic_threads
write /proc/apanic_console 1
# create basic filesystem structure
mkdir /data/nvram 2770 root system
mkdir /data/misc 01771 system misc
mkdir /data/misc/adb 02750 system shell
mkdir /data/misc/bluetoothd 0770 bluetooth bluetooth
mkdir /data/misc/bluetooth 0770 system system
mkdir /data/misc/keystore 0700 keystore keystore
mkdir /data/misc/keychain 0771 system system
mkdir /data/misc/sms 0770 system radio
mkdir /data/misc/vpn 0770 system vpn
mkdir /data/misc/systemkeys 0700 system system
# give system access to wpa_supplicant.conf for backup and restore
mkdir /data/misc/wifi 0770 wifi wifi
chmod 0660 /data/misc/wifi/wpa_supplicant.conf
mkdir /data/local 0771 shell shell
mkdir /data/local/tmp 0771 shell shell
mkdir /data/data 0771 system system
mkdir /data/app-private 0771 system system
mkdir /data/app-asec 0700 root root
mkdir /data/app-lib 0771 system system
mkdir /data/app 0771 system system
mkdir /data/property 0700 root root
mkdir /data/ssh 0750 root shell
mkdir /data/ssh/empty 0700 root root
# create dalvik-cache, so as to enforce our permissions
mkdir /data/dalvik-cache 0771 system system
# create resource-cache and double-check the perms
mkdir /data/resource-cache 0771 system system
chown system system /data/resource-cache
chmod 0771 /data/resource-cache
# create the lost+found directories, so as to enforce our permissions
mkdir /data/lost+found 0770
mkdir /cache/lost+found 0770
# double check the perms, in case lost+found already exists, and set owner
chown root root /data/lost+found
chmod 0770 /data/lost+found
chown root root /cache/lost+found
chmod 0770 /cache/lost+found
mkdir /data/drm 0770 drm drm
# dhcp server
mkdir /data/misc/dhcp 0770 dhcp dhcp
chown dhcp dhcp /data/misc/dhcp
# device info interface
#insmod /system/lib/modules/devinfo.ko
#mknod /dev/devmap c 196 0;
chmod 0444 /dev/devmap
chown root system /dev/devmap
# load driver base driver
insmod /system/lib/modules/mtk_drvb_75.ko
mknod /dev/drvb c 176 0
chmod 0666 /dev/drvb
start NvRAMAgent
## Custom pos-fs area (START)
write /proc/sys/vm/overcommit_memory 1
write /proc/sys/vm/min_free_order_shift 4
chown root system /sys/module/lowmemorykiller/parameters/adj
chmod 0664 /sys/module/lowmemorykiller/parameters/adj
chown root system /sys/module/lowmemorykiller/parameters/minfree
chmod 0664 /sys/module/lowmemorykiller/parameters/minfree
# Tweak background writeout
write /proc/sys/vm/dirty_expire_centisecs 200
write /proc/sys/vm/dirty_background_ratio 5
# Permissions for System Server and daemons.
chown radio system /sys/android_power/state
chown radio system /sys/android_power/request_state
chown radio system /sys/android_power/acquire_full_wake_lock
chown radio system /sys/android_power/acquire_partial_wake_lock
chown radio system /sys/android_power/release_wake_lock
chown system system /sys/power/autosleep
chown system system /sys/power/state
chown system system /sys/power/wakeup_count
chown radio system /sys/power/wake_lock
chown radio system /sys/power/wake_unlock
chmod 0660 /sys/power/state
chmod 0660 /sys/power/wake_lock
chmod 0660 /sys/power/wake_unlock
chown system system /sys/devices/system/cpu/cpufreq/interactive/timer_rate
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/timer_rate
chown system system /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/min_sample_time
chown system system /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/hispeed_freq
chown system system /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load
chown system system /sys/devices/system/cpu/cpufreq/interactive/above_hispeed_delay
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/above_hispeed_delay
chown system system /sys/devices/system/cpu/cpufreq/interactive/boost
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/boost
chown system system /sys/devices/system/cpu/cpufreq/interactive/boostpulse
chown system system /sys/devices/system/cpu/cpufreq/interactive/input_boost
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/input_boost
chown system system /sys/devices/system/cpu/cpufreq/interactive/boostpulse_duration
chmod 0660 /sys/devices/system/cpu/cpufreq/interactive/boostpulse_duration
# Assume SMP uses shared cpufreq policy for all CPUs
chown system system /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
chmod 0660 /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
chown system system /sys/class/timed_output/vibrator/enable
chown system system /sys/class/leds/keyboard-backlight/brightness
chown system system /sys/class/leds/lcd-backlight/brightness
chown system system /sys/class/leds/button-backlight/brightness
chown system system /sys/class/leds/jogball-backlight/brightness
chown system system /sys/class/leds/red/brightness
chown system system /sys/class/leds/green/brightness
chown system system /sys/class/leds/blue/brightness
chown system system /sys/class/leds/red/device/grpfreq
chown system system /sys/class/leds/red/device/grppwm
chown system system /sys/class/leds/red/device/blink
chown system system /sys/class/leds/red/brightness
chown system system /sys/class/leds/green/brightness
chown system system /sys/class/leds/blue/brightness
chown system system /sys/class/leds/red/device/grpfreq
chown system system /sys/class/leds/red/device/grppwm
chown system system /sys/class/leds/red/device/blink
chown system system /sys/class/timed_output/vibrator/enable
chown system system /sys/module/sco/parameters/disable_esco
chown system system /sys/kernel/ipv4/tcp_wmem_min
chown system system /sys/kernel/ipv4/tcp_wmem_def
chown system system /sys/kernel/ipv4/tcp_wmem_max
chown system system /sys/kernel/ipv4/tcp_rmem_min
chown system system /sys/kernel/ipv4/tcp_rmem_def
chown system system /sys/kernel/ipv4/tcp_rmem_max
chown root radio /proc/cmdline
# Define TCP buffer sizes for various networks
# ReadMin, ReadInitial, ReadMax, WriteMin, WriteInitial, WriteMax,
setprop net.tcp.buffersize.default 4096,87380,110208,4096,16384,110208
setprop net.tcp.buffersize.wifi 524288,1048576,2097152,262144,524288,1048576
setprop net.tcp.buffersize.lte 524288,1048576,2097152,262144,524288,1048576
setprop net.tcp.buffersize.umts 4094,87380,110208,4096,16384,110208
setprop net.tcp.buffersize.hspa 4094,87380,262144,4096,16384,262144
setprop net.tcp.buffersize.hsupa 4094,87380,262144,4096,16384,262144
setprop net.tcp.buffersize.hsdpa 4094,87380,262144,4096,16384,262144
setprop net.tcp.buffersize.hspap 4094,87380,1220608,4096,16384,1220608
setprop net.tcp.buffersize.edge 4093,26280,35040,4096,16384,35040
setprop net.tcp.buffersize.gprs 4092,8760,11680,4096,8760,11680
setprop net.tcp.buffersize.evdo 4094,87380,262144,4096,16384,262144
# Set this property so surfaceflinger is not started by system_init
setprop system_init.startsurfaceflinger 0
class_start core
class_start main
# Touch Panel
chown root diag /sys/module/tpd_setting/parameters/tpd_calmat
chown root diag /sys/module/tpd_setting/parameters/tpd_em_debounce_time
chown root diag /sys/module/tpd_debug/parameters/tpd_em_log
chown root diag /sys/module/tpd_debug/parameters/tpd_em_log_to_fs
chmod 0777 /dev/pmem_multimedia
chmod 0777 /dev/mt6516-isp
chmod 0777 /dev/mt6516-IDP
chmod 0777 /dev/mt9p012
chmod 0777 /dev/mt6516_jpeg
chmod 0777 /dev/FM50AF
# RTC
mkdir /data/misc/rtc 0770 system system
# M4U
#insmod /system/lib/modules/m4u.ko
#mknod /dev/M4U_device c 188 0
chmod 0444 /dev/M4U_device
# Sensor
chmod 0666 /dev/hwmsensor
chmod 0666 /dev/msensor
chmod 0666 /dev/gsensor
chmod 0666 /dev/alsps
#VideoCodec
insmod /system/lib/modules/vcodec_kernel_driver.ko
mknod /dev/Vcodec c 189 0
chmod 0666 /dev/Vcodec
mkdir /data/amit/
# GPIO
chmod 0666 /dev/mtgpio
#NFC
rm /data/mtknfc_server
## Custom pos_fs area (END)
# Separate location for storing security policy files on data
mkdir /data/security 0711 system system
# Reload policy from /data/security if present.
setprop selinux.reload_policy 1
# Set SELinux security contexts on upgrade or policy update.
restorecon_recursive /data
# If there is no fs-post-data action in the init.<device>.rc file, you
# must uncomment this line, otherwise encrypted filesystems
# won't work.
# Set indication (checked by vold) that we have finished this action
setprop vold.post_fs_data_done 1
on boot
start drvbd
# basic network init
ifup lo
hostname localhost
domainname localdomain
# Define RIL properties
setprop rild.nw.operlist /system/etc/ril/oper.lis
# AGPS
chmod 0777 /system/bin/mtk_agpsd
# Start default class, this line is very important!!
class_start default
class_start core
on nonencrypted
class_start main
class_start late_start
on property:vold.decrypt=trigger_default_encryption
start defaultcrypto
on property:vold.decrypt=trigger_encryption
start surfaceflinger
start encrypt
on property:vold.decrypt=trigger_reset_main
class_reset main
on property:vold.decrypt=trigger_load_persist_props
load_persist_props
on property:vold.decrypt=trigger_post_fs_data
trigger post-fs-data
on property:vold.decrypt=trigger_restart_min_framework
class_start main
on property:vold.decrypt=trigger_restart_framework
start nvram_daemon
class_start main
class_start late_start
start permission_check
on property:vold.decrypt=trigger_shutdown_framework
class_reset late_start
class_reset main
## Daemon processes to be run by init.
##
# Update the second boot logo
# service bootlogoupdater /system/bin/boot_logo_updater
# oneshot
service ueventd /sbin/ueventd
class core
critical
seclabel u:r:ueventd:s0
service logd /system/bin/logd
class core
socket logd stream 0666 logd logd
socket logdr seqpacket 0666 logd logd
socket logdw dgram 0222 logd logd
seclabel u:r:logd:s0
on property:selinux.reload_policy=1
restart ueventd
restart installd
service kisd /system/bin/kisd
user system
group system media
service console /system/bin/sh
class core
console
disabled
user shell
group shell log
seclabel u:r:shell:s0
on property:sys.powerctl=*
powerctl ${sys.powerctl}
on property:ro.debuggable=1
start console
# adbd is controlled via property triggers in init.<platform>.usb.rc
service adbd /sbin/adbd --root_seclabel=u:r:su:s0
class core
socket adbd stream 660 system system
disabled
seclabel u:r:adbd:s0
# adbd on at boot in emulator
on property:ro.kernel.qemu=1
start adbd
service servicemanager /system/bin/servicemanager
class core
user system
group system
critical
service vold /system/bin/vold
class core
socket vold stream 0660 root mount
ioprio be 2
# One shot invocation to deal with encrypted volume.
service defaultcrypto /system/bin/vdc --wait cryptfs mountdefaultencrypted
disabled
oneshot
# vold will set vold.decrypt to trigger_restart_framework (default
# encryption) or trigger_restart_min_framework (other encryption)
# One shot invocation to encrypt unencrypted volumes
service encrypt /system/bin/vdc --wait cryptfs enablecrypto inplace default
disabled
oneshot
# vold will set vold.decrypt to trigger_restart_framework (default
# encryption)
service netd /system/bin/netd
class main
socket netd stream 0660 root system
socket dnsproxyd stream 0660 root inet
socket mdns stream 0660 root system
#service debuggerd /system/bin/debuggerd
# class main
service ril-daemon /system/bin/rild
class main
socket rild stream 660 root radio
socket rild-debug stream 660 radio system
user root
group radio cache inet misc audio log
# adbd is controlled via property triggers in init.<platform>.usb.rc
service adbd /sbin/adbd
class core
service drvbd /system/bin/drvbd
class main
user system
group system
## Custom service area (START)
# Please add custom service below
service nvram_daemon /system/bin/nvram_daemon
class main
user root
group system
oneshot
service NvRAMAgent /system/bin/nvram_agent_binder
user system
group system
service mdlogger /system/bin/mdlogger
class main
user shell
group shell system radio sdcard_rw inet
disabled
oneshot
service dualmdlogger /system/bin/dualmdlogger
class main
user shell
group shell system radio sdcard_rw inet
disabled
oneshot
service factory_no_image /system/bin/factory
disabled
oneshot
service factory_with_image /sbin/factory
disabled
oneshot
#
## Custom service area (END)
on property:sys.mtk.no.factoryimage=1
start factory_no_image
on property:sys.mtk.no.factoryimage=0
start factory_with_image
#mass_storage,adb,acm
on property:ro.boot.usbconfig=0
write /sys/class/android_usb/android0/iSerial $ro.serialno
write /sys/class/android_usb/android0/enable 0
write /sys/class/android_usb/android0/idVendor 0e8d
write /sys/class/android_usb/android0/idProduct 2006
write /sys/class/android_usb/android0/f_acm/instances 1
write /sys/class/android_usb/android0/functions mass_storage,adb,acm
write /sys/class/android_usb/android0/enable 1
start adbd
#acm
on property:ro.boot.usbconfig=1
write /sys/class/android_usb/android0/enable 0
write /sys/class/android_usb/android0/iSerial " "
write /sys/class/android_usb/android0/idVendor 0e8d
write /sys/class/android_usb/android0/idProduct 2007
write /sys/class/android_usb/android0/f_acm/instances 1
write /sys/class/android_usb/android0/functions acm
write /sys/class/android_usb/android0/bDeviceClass 02
write /sys/class/android_usb/android0/enable 1
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