Flex yylineno set to 1

Question

I\'m writing a simple parser for tcpdump logs, could you please tell me why I can\'t get proper line number?

%{
char str[80];
%}
%option yylineno

...
%%

^{         


        

Answer 1

When I tried this, it turned out that I had to have a rule that actually matches newline for yylineno to be updated. With the following rule it worked, and without it yylineno never changed:

\n { }