envmon_evhandler
static void envmon_evhandler(const char *ename, const void *earg,
res = ptree_register_handler(PICL_FRU_ADDED, envmon_evhandler, NULL);
res = ptree_register_handler(PICL_FRU_REMOVED, envmon_evhandler, NULL);
envmon_evhandler, NULL);
envmon_evhandler, NULL);