前言说明

此文章仅作为技术经验记录，核心思想，就是在 init.rc 里面移除服务，致使 frameworks 不被启动，其它不便多说。

此文章内容为系统服务移除篇，最终实现的效果是 Android 相关的系统核心服务均不被运行，实现释放大量的硬件资源。

下一篇为文件裁剪篇（视情况而定），主要目的是移除大量 Android frameworks 的文件，加快编译速度和减小固件大小。

应用补丁

From 7c7192cdfc157eca58f03dd8b0e4e32767c9dbad Mon Sep 17 00:00:00 2001
From: lovemengx <lovemengx@qq.com>
Date: Wed, 5 Aug 2020 20:30:46 +0800
Subject: [PATCH] =?UTF-8?q?=E7=A7=BB=E9=99=A4=20frameworks=20=E6=9C=8D?=
 =?UTF-8?q?=E5=8A=A1,=20=E5=BC=80=E6=9C=BA=E9=80=9F=E5=BA=A6=E6=8F=90?=
 =?UTF-8?q?=E5=8D=87=E5=88=B0=209=20=E7=A7=92=E5=AE=8C=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 device/rda/common/res/init.rc                 | 293 +++++++++---------
 .../rda/etau/NollecA9V2V8810P/oem_driver.rc   |   2 +-
 device/rda/etau/init.rda8810.rc               | 110 +++----
 3 files changed, 204 insertions(+), 201 deletions(-)

diff --git a/device/rda/common/res/init.rc b/device/rda/common/res/init.rc
index b404e840ba..4b665d2a24 100755
--- a/device/rda/common/res/init.rc
+++ b/device/rda/common/res/init.rc
@@ -120,6 +120,7 @@ loglevel 15
     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
+    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor performance

 # qtaguid will limit access to specific data based on group memberships.
 #   net_bw_acct grants impersonation of socket owners.
@@ -360,20 +361,20 @@ on boot

 # 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
+#    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
+#   setprop system_init.startsurfaceflinger 0

 #open coredump
     setrlimit 4 -1 -1
@@ -425,26 +426,26 @@ service ueventd /sbin/ueventd
     critical
     seclabel u:r:ueventd:s0

-service watchdogd /sbin/watchdogd
-    class core
-    critical
-    seclabel u:r:watchdogd:s0
+#service watchdogd /sbin/watchdogd
+#    class core
+#    critical
+#    seclabel u:r:watchdogd:s0

-service healthd /system/bin/healthd
-    class core
-    critical
-    seclabel u:r:healthd:s0
+#service healthd /system/bin/healthd
+#    class core
+#    critical
+#    seclabel u:r:healthd:s0

-on property:selinux.reload_policy=1
-    restart ueventd
-    restart installd
+#on property:selinux.reload_policy=1
+#    restart ueventd
+#    restart installd

 service console /system/bin/sh
     class core
     console
     disabled
-    user shell
+    user root
     group log

 #on property:ro.debuggable=1
@@ -478,9 +479,9 @@ service usb_traced /system/bin/usb_traced
     class main
     disabled

-service AT_transfer /system/bin/AT_transfer
-    class main
-    disabled
+#service AT_transfer /system/bin/AT_transfer
+#    class main
+#    disabled

 on property:debug.usbtrace=1
     write /sys/class/android_usb/android0/f_mlog/bp_trace 1
@@ -498,131 +499,133 @@ on property:debug.fta.enable=0
     setprop sys.usb.config mtp,adb
     stop AT_transfer

-service servicemanager /system/bin/servicemanager
-    class core
-    user system
-    group system
-    critical
-    onrestart restart healthd
-    onrestart restart zygote
-    onrestart restart media
-    onrestart restart surfaceflinger
-    onrestart restart drm
+#service servicemanager /system/bin/servicemanager
+#    class core
+#    user system
+#    group system
+#    critical
+#    onrestart restart healthd
+#    onrestart restart zygote
+#    onrestart restart media
+#    onrestart restart surfaceflinger
+#    onrestart restart drm

 service vold /system/bin/vold
     class core
     socket vold stream 0660 root mount
     ioprio be 2

-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 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 system
-
-service surfaceflinger /system/bin/surfaceflinger
-    class main
-    user root
-    group graphics drmrpc
-    onrestart restart zygote
-
-service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server
-    class main
-    socket zygote stream 660 root system
-    onrestart write /sys/android_power/request_state wake
-    onrestart write /sys/power/state on
-    onrestart restart media
-    onrestart restart netd
-
-service drm /system/bin/drmserver
-    class main
-    user drm
-    group drm system inet drmrpc
-
-service media /system/bin/mediaserver
-    class main
-    user root
-    group audio camera inet net_bt net_bt_admin net_bw_acct drmrpc
-    ioprio rt 4
-
-service bootanim /system/bin/bootanimation
-    class main
-    user graphics
-    group graphics
-    disabled
-    oneshot
-
-service shutdownanim /system/bin/bootanimation shut
-    class main
-    user graphics
-    group graphics
-    disabled
-    oneshot
-
-service installd /system/bin/installd
-    class main
-    socket installd stream 600 system system
-
-service flash_recovery /system/etc/install-recovery.sh
-    class main
-    oneshot
-
-service racoon /system/bin/racoon
-    class main
-    socket racoon stream 600 system system
-    # IKE uses UDP port 500. Racoon will setuid to vpn after binding the port.
-    group vpn net_admin inet
-    disabled
-    oneshot
-
-service mtpd /system/bin/mtpd
-    class main
-    socket mtpd stream 600 system system
-    user vpn
-    group vpn net_admin inet net_raw
-    disabled
-    oneshot
-
-service keystore /system/bin/keystore /data/misc/keystore
-    class main
-    user keystore
-    group keystore drmrpc
-    socket keystore stream 666
-
-service dumpstate /system/bin/dumpstate -s
-    class main
-    socket dumpstate stream 0660 shell log
-    disabled
-    oneshot
-
-service sshd /system/bin/start-ssh
-    class main
-    disabled
-
-service mdnsd /system/bin/mdnsd
-    class main
-    user mdnsr
-    group inet net_raw
-    socket mdnsd stream 0660 mdnsr inet
-    disabled
-    oneshot
-
-service usbdrvinstall /system/bin/sh /vendor/modules/usbdrvinstall.sh
-    user root
-    group root
-    disabled
-    oneshot
-
-service su_daemon  /system/xbin/su --daemon
-    class main
-    user root
+#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 system
+
+#service surfaceflinger /system/bin/surfaceflinger
+#    class main
+#    user root
+#    group graphics drmrpc
+#    onrestart restart zygote
+
+#service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server
+#    class main
+#    socket zygote stream 660 root system
+#    onrestart write /sys/android_power/request_state wake
+#    onrestart write /sys/power/state on
+#    onrestart restart media
+#    onrestart restart netd
+
+#service drm /system/bin/drmserver
+#    class main
+#    user drm
+#    group drm system inet drmrpc
+
+#service media /system/bin/mediaserver
+#    class main
+#    user root
+#    group audio camera inet net_bt net_bt_admin net_bw_acct drmrpc
+#    ioprio rt 4
+
+#service bootanim /system/bin/bootanimation
+#    class main
+#    user graphics
+#    group graphics
+#    disabled
+#    oneshot
+#
+#service shutdownanim /system/bin/bootanimation shut
+#    class main
+#    user graphics
+#    group graphics
+#    disabled
+#    oneshot
+
+#service installd /system/bin/installd
+#    class main
+#    socket installd stream 600 system system
+#
+#service flash_recovery /system/etc/install-recovery.sh
+#    class main
+#    oneshot
+#
+#service racoon /system/bin/racoon
+#    class main
+#    socket racoon stream 600 system system
+#    # IKE uses UDP port 500. Racoon will setuid to vpn after binding the port.
+#    group vpn net_admin inet
+#    disabled
+#    oneshot
+#
+#service mtpd /system/bin/mtpd
+#    class main
+#    socket mtpd stream 600 system system
+#    user vpn
+#    group vpn net_admin inet net_raw
+#    disabled
+#    oneshot
+
+#service keystore /system/bin/keystore /data/misc/keystore
+#    class main
+#    user keystore
+#    group keystore drmrpc
+#    socket keystore stream 666
+
+## 可以用dumpstate 获取设备的各种信息
+#service dumpstate /system/bin/dumpstate -s
+#    class main
+#    socket dumpstate stream 0660 shell log
+#    disabled
+#    oneshot
+
+#service sshd /system/bin/start-ssh
+#    class main
+#    disabled
+
+## mdnsd 是多播 DNS 和 DNS 服务发现的守护程序
+#service mdnsd /system/bin/mdnsd
+#    class main
+#    user mdnsr
+#    group inet net_raw
+#    socket mdnsd stream 0660 mdnsr inet
+#    disabled
+#    oneshot
+
+#service usbdrvinstall /system/bin/sh /vendor/modules/usbdrvinstall.sh
+#    user root
+#    group root
+#    disabled
+#    oneshot
+
+#service su_daemon  /system/xbin/su --daemon
+#    class main
+#    user root
diff --git a/device/rda/etau/NollecA9V2V8810P/oem_driver.rc b/device/rda/etau/NollecA9V2V8810P/oem_driver.rc
index c5ae844e58..3719883cae 100755
--- a/device/rda/etau/NollecA9V2V8810P/oem_driver.rc
+++ b/device/rda/etau/NollecA9V2V8810P/oem_driver.rc
@@ -1,6 +1,6 @@
 on early-boot
 #    insmod /vendor/modules/ssv6x5x.ko
-    insmod /vendor/driver/rda_headset.ko
+#    insmod /vendor/driver/rda_headset.ko
     insmod /vendor/modules/galcore.ko registerMemBase=0x20080000 irqLine=25 baseAddress=0x80000000 showArgs=1
     insmod /vendor/modules/vpu.ko
     insmod /vendor/modules/voc.ko
diff --git a/device/rda/etau/init.rda8810.rc b/device/rda/etau/init.rda8810.rc
index bd5794b342..867136a978 100755
--- a/device/rda/etau/init.rda8810.rc
+++ b/device/rda/etau/init.rda8810.rc
@@ -1,4 +1,4 @@
-import init.ril.rc
+#import init.ril.rc
 import init.rda.usb.rc
 import init.storage.rc
 import oem_driver.rc
@@ -14,7 +14,6 @@ on post-fs-data
     mkdir /data/misc/wpa_supplicant 0770 wifi wifi
     mkdir /data/misc/dhcp 0770 dhcp dhcp
     chown dhcp dhcp /data/misc/dhcp
-    chmod 777 /data/misc/wifi/wpa_supplicant.conf

 on init
     mkdir /vendor 0770 system system
@@ -74,18 +73,19 @@ on boot
     chown system system /sys/devices/virtual/input/input2/driver/enabled
     chown system system /sys/devices/platform/rda-headset.0/enabled

-    mkdir /data/local/tmp/xlog 0777
-
 on property:ro.debuggable=1
     write /sys/module/kgdboc/parameters/kgdboc ttyS0

-# turn on and turn off Wi-Fi
-    write /sys/class/rfkill/rfkill0/state 1
-    write /sys/class/rfkill/rfkill0/state 0
-
 on property:init.svc.wpa_supplicant=stopped
     stop dhcpcd_wlan0

+on property:persist.sys.usb.config=*
+    setprop sys.usb.config none
+    setprop sys.usb.config adb
+
+on property:app.sdcard.exist=1
+    mount vfat /dev/block/mmcblk0p1 /sdcard
+
 service androidlogonsd /system/xbin/androidlogonsd.sh
     class main
     disabled
@@ -97,13 +97,13 @@ service androidlogonsd /system/xbin/androidlogonsd.sh
 ###############################################################
 # redirect logs(LOGE, LOGI...) to linux console
 ###############################################################
-service logcat /system/bin/logcat -f /dev/kmsg *:W
-    disabled
-    oneshot
+#service logcat /system/bin/logcat -f /dev/kmsg *:W
+#    disabled
+#    oneshot

-service bootlogo /system/bin/bootlogo /system/media/bootlogo
-    user root
-    oneshot
+#service bootlogo /system/bin/bootlogo /system/media/bootlogo
+#    user root
+#    oneshot

 service swapd /system/xbin/createswap.sh
     class main
@@ -126,34 +126,34 @@ service fatd /system/xbin/createfat.sh
     class main
     oneshot

-service gsmMuxd /system/bin/gsmMuxd -m basic -s /dev/modem0 -l /dev/ttyMux -b 115200 -n 8 -f 2047
-    class main
-    user root
-    group radio cache inet misc audio sdcard_rw log system
-    seclabel u:r:gsmMuxd:s0
-
-service ril_ctl  /system/bin/logwrapper  /system/bin/ril_ctl
-    class main
-    user root
-    seclabel u:r:ril_ctl:s0
-
-service wpa_supplicant /system/bin/wpa_supplicant \
-    -Dnl80211 -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf -dd \
-    -g@android:wpa_wlan0
-    class main
-    socket wpa_wlan0 dgram 660 wifi wifi
-    disabled
-    oneshot
+#service gsmMuxd /system/bin/gsmMuxd -m basic -s /dev/modem0 -l /dev/ttyMux -b 115200 -n 8 -f 2047
+#    class main
+#    user root
+#    group radio cache inet misc audio sdcard_rw log system
+#    seclabel u:r:gsmMuxd:s0

-service dhcpcd_wlan0 /system/bin/logwrapper /system/bin/dhcpcd -A -dd
-    class main
-    disabled
-    oneshot
+#service ril_ctl  /system/bin/logwrapper  /system/bin/ril_ctl
+#    class main
+#    user root
+#    seclabel u:r:ril_ctl:s0

-service iprenew_wlan0 /system/bin/logwrapper /system/bin/dhcpcd -n
-    class main
-    disabled
-    oneshot
+#service wpa_supplicant /system/bin/wpa_supplicant \
+#    -Dnl80211 -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf -dd \
+#    -g@android:wpa_wlan0
+#    class main
+#    socket wpa_wlan0 dgram 660 wifi wifi
+#    disabled
+#    oneshot
+#
+#service dhcpcd_wlan0 /system/bin/logwrapper /system/bin/dhcpcd -A -dd
+#    class main
+#    disabled
+#    oneshot
+#
+#service iprenew_wlan0 /system/bin/logwrapper /system/bin/dhcpcd -n
+#    class main
+#    disabled
+#    oneshot

 #Do not need on Android4.2
 #service hciattach /system/bin/logwrapper /system/bin/hciattach -n -s 115200 /dev/ttyS1 rda 115200 noflow
@@ -186,19 +186,19 @@ service iprenew_wlan0 /system/bin/logwrapper /system/bin/dhcpcd -n
 #    oneshot

-service preinstall /system/bin/sh /system/bin/preinstall.sh
-    user root
-    group root
-    disabled
-    oneshot
-
-service apanic /system/bin/sh /system/bin/init.apanic.sh
-    user root
-    group root
-    disabled
-    oneshot
-
-on property:sys.boot_completed=1
-    start preinstall
-    start apanic
+#service preinstall /system/bin/sh /system/bin/preinstall.sh
+#    user root
+#    group root
+#    disabled
+#    oneshot
+#
+#service apanic /system/bin/sh /system/bin/init.apanic.sh
+#    user root
+#    group root
+#    disabled
+#    oneshot
+#
+#on property:sys.boot_completed=1
+#    start preinstall
+#    start apanic

--
2.19.2