function::isinstr - Returns whether a string is a substring of another string

s1
           string to search in

       s2
           substring to find

       This function returns 1 if string s1 contains s2, otherwise zero.

       function::isinstr - Returns whether a string is a substring of another string

tapset::string(3stap)

SystemTap Tapset Reference                         April 2024                           FUNCTION::ISINSTR(3stap)

           isinstr:long(s1:string,s2:string)