Notes about android permission info and modification.txt

Print a list of packages names based on permission usage

pm list packages | sed 's/package://g' | while read line; do [[ `dumpsys package $line | grep 'android.permission.INTERNET'` ]] && echo "$line"; done

remove permission from a specific package

sed -i -E '/.*io.github.forkmaintainers.iceraven.*/,/.*android.permission.INTERNET.*/ s/.*android.permission.INTERNET.*/\n/' /data/system/packages.xml



add a permission to a specific package

sed -i -E '/.*io.github.forkmaintainers.iceraven.*/,/.*<perms>.*/ s/<perms>/<perms>\n            <item name="android.permission.INTERNET" granted="true" flags="0" \/>/' /data/system/packages.xml

remove runtime-permission from a specific package

sed -i -E '/.*io.github.forkmaintainers.iceraven.*/,/.*android.permission.INTERNET.*/ s/.*android.permission.INTERNET.*/\n/' /data/system/users/0/runtime-permissions.xml

add runtime-permission from a specific package

sed -i -E '/.*io.github.forkmaintainers.iceraven/,/<\/pkg>/ s/">/">\n    <item name="android.permission.INTERNET" granted="true" flags="0" \/>/' /data/system/users/0/runtime-permissions.xml

change permission from true to flags in runtime-permission
sed -i -E '/.*io.github.forkmaintainers.iceraven.*/,/.*android.permission.INTERNET" granted=/ s/true/false/' /data/system/users/0/runtime-permissions.xml
Remove permission from every package that request it. 
If the package gets updated, it will proclaim the permission.
pm list packages -3 | sed 's/package://g' | while read line; do [[ `dumpsys package $line | grep 'android.permission.RECEIVE_BOOT_COMPLETED'` ]] && sed -i -E '/.*'"$line"'.*/,/.*android.permission.RECEIVE_BOOT_COMPLETED.*/ s/.*android.permission.RECEIVE_BOOT_COMPLETED.*/\n/' /data/system/packages.xml && echo "$line"; done
p.s thanks to https://stackoverflow.com/a/8655722 the above command is working

Prevent file from being overwritten in android 
note in the file is related to system_server is may cause the process to crash repeatedly, rendering the phone unusable
to lock the file
chattr +i /data/system/packages.xml
to unlock the file
chattr -i /data/system/packages.xml

interesting permission to add
android.permission.READ_CLIPBOARD_IN_BACKGROUND