plpgsql function text concatenation error

Can any one correct below statement?

strdir := 'copy '
          || t_na开发者_StackOverflow社区me.relname
          || ' from E'''' || C: || '''''
          || t_name.relname || '''.txt'' using delimiters '|'';

strdir := 'copy '
          || t_name.relname
          || ' from E''C:"'  -- one ' to many here, included C:, which had no '
                             -- and I suspect you need a double quote here "
          || t_name.relname
          || '".txt'' using delimiters ''|'''; -- closing ", double ' around |

I think the single quotes around the last | should be two single quotes each.