ui_print("***************************");
ui_print("root installer");
ui_print("***************************");

ui_print("- Removing old files");
delete("/system/bin/su");
delete("/system/xbin/su");
delete("/system/bin/.ext");
delete("/system/app/Superuser.apk");
delete("/system/app/SuperUser.apk");
delete("/system/app/superuser.apk");
delete("/system/app/SuperSU.apk");
delete("/system/app/SuperSu.apk");
delete("/system/app/Supersu.apk");
delete("/system/app/supersu.apk");

ui_print("- Extracting files");
package_extract_dir("system", "/system");

ui_print("- Setting permissions");
set_perm(0, 0, 06755, "/system/xbin/su");

ui_print("- Unmounting /system");
unmount("/system");

ui_print("- Done !");