This tool is get/set system properties.Support all android versions in theory. I just tested on android M, N, O, P, Q and R.
Set operation need root first, and can set all the properties(include prefixed with 'ro').
usage: system_properties [-h] [-a] [-l log_level] [-s] [-f] prop_name prop_value
-h: display this help message
-a: dump all system properties
-l log_level: console = 1 logcat = 2 consle + logcat = 3(default)
-s print security context(selabel)
-f read property_contexts files to get security context
example: system_properties ro.debuggable 1
In the root directory, use ndk-build.bat(Windows) or ndk-build.sh(Linux)
2017.10.15 first commit
2017.12.14 support for android O
2018.08.03 1. support for android P
2. add security context(selabel) to print
2019.09.25 support for android Q
2020.07.13 1. support for android R
2. support long property name and property value
2021.06.26 use file(/dev/__properties__/property_info) to get security contexts
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