https://docs.redhat.com/es/documentation/red_hat_enterprise_linux/7/html/systemtap_tapset_reference/api-returnstr
function::returnstr | SystemTap Tapset Reference | Red Hat Enterprise Linux | 7 | Red Hat...
function::returnstr | SystemTap Tapset Reference | Red Hat Enterprise Linux | 7 | Red Hat Documentation
red hat enterprise linuxfunctionsystemtapreference