{
    "services" : [{
            "name" : "usb_service",
            "path" : ["/system/bin/sa_main", "/system/profile/usb_service.xml"],
            "ondemand" : true,
            "uid" : "usb",
            "gid" : ["usb", "shell"],
            "apl" : "system_basic",
            "secon" : "u:r:usb_service:s0"
        }
    ]
}