Magisk/app/src/main/java/com/topjohnwu/magisk/receivers/PackageReceiver.java

package com.topjohnwu.magisk.receivers;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

import com.topjohnwu.magisk.MagiskManager;
import com.topjohnwu.magisk.superuser.Policy;
import com.topjohnwu.magisk.utils.Utils;

public class PackageReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        MagiskManager magiskManager = Utils.getMagiskManager(context);
        magiskManager.initSUConfig();

        String pkg = intent.getData().getEncodedSchemeSpecificPart();
        Policy policy = magiskManager.suDB.getPolicy(pkg);
        if (policy == null)
            return;

        switch (intent.getAction()) {
            case Intent.ACTION_PACKAGE_REPLACED:
                // This will only work pre-O
                if (magiskManager.suReauth) {
                    magiskManager.suDB.deletePolicy(policy);
                } else {
                    int uid = intent.getIntExtra(Intent.EXTRA_UID, -1);
                    // Update the UID if available
                    if (uid > 0) {
                        policy.uid = uid % 100000;
                    }
                    magiskManager.suDB.updatePolicy(policy);
                }
                break;
            case Intent.ACTION_PACKAGE_FULLY_REMOVED:
                magiskManager.suDB.deletePolicy(policy);
                break;
        }
    }
}