Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
function::egid - Returns the effective gid of a target process
SYNOPSIS
egid:long()
ARGUMENTS
None
DESCRIPTION
This function returns the effective gid of a target process
SEE ALSO
tapset::context(3stap)
SystemTap Tapset Reference April 2016 FUNCTION::EGID(3stap)