#!/bin/bash

file="$1"
if [[ "X" == "X${file}" ]]
   then
     file="${HISTFILE}"
   fi

prev=""
cat ${file} | while read line
 do
   mtch=$(echo ${line} | grep '^#[0-9]')
   # echo "DEBUG: line:[${line}]  mtch:[${mtch}]"
   if [[ "X" == "X${mtch}" ]]
    then
      if [[ "X" != "X{${prev}" ]]
       then
         echo "${prev}"
       fi
      prev="${line}"
    else
      tmp=$(echo ${line} | sed 's/#//') 
      # echo "MATCHED DEBUG: line:[${line}]  tmp:[${tmp}]"
      dt=$(date -d "1970-01-01 ${tmp} sec UTC")
      echo -n "[${dt}]> ${prev}"
      prev=""
    fi
 done