Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
function::errno_str - Symbolic string associated with error code
SYNOPSIS
errno_str:string(err:long)
ARGUMENTS
err
The error number received
DESCRIPTION
This function returns the symbolic string associated with the giver error code, such as ENOENT for the
number 2, or E#3333 for an out-of-range value such as 3333.
SystemTap Tapset Reference March 2016 FUNCTION::ERRNO_STR(3stap)