Open mt6735 android5.1 Dev View permissions

ANDROID5, security enhancements/dev directory cannot be viewed, and cannot enumerate serial ports

View/dev must first know what type of process your app is running on.

Want to know what your process (APP) belongs to *.te?

View with ps-z: Root@aaaa:/ # ps -z ps -z label                            User     pid   ppid  name ................ ........ ............... ........ u:r:platform_app:s0             u0_a23    4003  758    Com.android.browser u:r:platform_app:s0             U0_a3     4249  758   com.android.defcontainer U:r:untrusted_ app:s0           u0_a61    4329   758   com.svox.pico u:r:kernel:s0                   root      5236  2     kworker/u9 : 0 u:r:untrusted_app:s0           u0_a75     5311  760   com.qihoo.daemon u:r:untrusted_app:s0            u0_a75    5333  760    Com.qihoo.appstore u:r:netdiag:s0                  shell     5731  741   /system/bin/ Netdiag u:r:netdiag:s0                  shell     5733  5731  sh u:r:netdiag:s0                  shell      5734  5733  tcpdump u:r:kernel:s0                   root      5746   2     kbase_event u:r:kernel:s0                   root      5782   2     kworker/u8:1 u:r:kernel:s0                   root      5783   2     kworker/u8:6 u:r:kernel:s0                   root      5784   2     kworker/1:0 u:r:kernel:s0                   root      5786  2      fs_suspend_syss u:r:kernel:s0                   root      5787   2     kworker/u8:7 u:r:kernel:s0                   root      5796   2     kworker/u8:8 u:r:kernel:s0                   root      5805   2     kworker/u8:9 u:r:platform_app:s0             u0_a30    5835  758    Com.android.deskclock u:r:kernel:s0                   root      5858  2     kworker/0:0 U:r:kernel: s0                   Root      5894  2     kworker/u9:3 U:r: untrusted_app:s0           u0_a76     5913  760   android_serialport_api.samp le u:r:kernel:s0                   root       6014  2     kworker/1:3 u:r:kernel:s0                   root       6052&nBsp; 2     kworker/0:1 u:r:kernel:s0                   root      6056   2     kworker/u9:2 u:r:su:s0                       root       6427  3479  /system/bin/sh u:r:su:s0                       root       6433  6427  ps root@aaaaaa:/ # Android_serialport_ Api.sample Process Security Policy  untrusted_app This group configuration    need to modify  untrusted_app.te files
Lookup method Find-name "Untrusted_app.te" >findlog
The location of the MT6735 Untrusted_app.te file is viewed under Alps\device\mediatek\common\sepolicy and Alps\external\sepolicy directory Alps\exter Nal\sepolicy\file_contexts
########################################### # Root # Nothing required since it are INITRAMFS and implicitly # by Genfscon Rootfs in Ocontexts.        # ########################## # Devices #/dev (/.*)? u:object_r:device:s0/dev/akm8973.* U:object_r:akm_device:s0/dev/accelerometer U:object_r:accelerometer_device: S0/dev/alarm u:object_r:alarm_device:s0 ........ .......... ...
/dev (/.*)? The U:object_r:device:s0/dev directory belongs to the device user group to open the following two files Alps\device\mediatek\common\sepolicy\untrusted_app.te
Alps\external\sepolicy\untrusted_app.te
Add plus # ACCESS/DEV/MTP_USB at the end. Allow Untrusted_app mtp_device:chr_file rw_file_perms; Allow Untrusted_app tty_device:chr_file rw_file_perms; Allow Untrusted_app serial_device:chr_file rw_file_perms; Allow Untrusted_app Device:dir rw_dir_perms; Allow Untrusted_app ttyacm_device:chr_file rw_file_perms; Allow Untrusted_app ttymt_device:chr_file rw_file_perms; Allow Untrusted_app ttygs_device:chr_file rw_file_perms;
Re-compiling to access the
Open serial port read-write alps\device\mediatek\common\sepolicy\ Untrusted_app.te
Add Plus at end
Allow Untrusted_app ttyacm_device:chr_file rw_file_perms; Allow Untrusted_app ttymt_device:chr_file rw_file_perms; Allow Untrusted_app ttygs_device:chr_file rw_file_perms;