dmesg messages time retrieval (hours or minutes ago)

dmesg_time.sh

#!/bin/bash

#Usage:  dmesg | grep eth3 | dmesg_time.sh

for time in $(egrep -o '[0-9]+\.[0-9]+')
do
        TIME="`echo "($(awk '{print $1}' /proc/uptime) - $time) / 60 / 60" | bc`h" # Hours
        TIME="$TIME or `echo "($(awk '{print $1}' /proc/uptime) - $time) / 60" | bc`m" # Minutes
        echo "$TIME ago"
done

after
http://www.digitalprognosis.com/linuxtips/timestamping-linux-kernel-printk-output-in-dmesg-for-fun-and-profit/