Запись журналов для openvpn в Ubuntu18

sed '
    /{r}/{                                  #if line consist {r}
        :1                                  #mark No.1
        $!{                                 #if not last line:
            N                               #append next line
            /\n\n/!b1                       #if not empty line
        }                                   #+return to mark No.1
    }     #=collect one paragraph(from {r} to empty line) 
    s/}.*imname <- "\([^"]*\)/ figname:\1&/ #add text after "imname" to "r"
' test.txt