bkam

#!/bin/bashMSG="`cat`"SENT=$(date --date "$(grep -m1 '^Date: ' <<< "$MSG" | sed -e 's/Date://')" +%s)[ $SENT ] || exit#RECV=$(date --date "$(grep '^From ' $FILE | cut -d' ' -f 3-)" +%s)RECV=$(date +%s)T=$(($RECV-$SENT))if (($T>31104000)); then    Y="$(bc <<< $T/60/60/24/365)y, "    MO="$(bc <<< $T/60/60/24%365/30)mon, "    W="$(bc <<< $T/60/60/24%365%30/7)w, "    D="$(bc <<< $T/60/60/24%365%30%7)d"elif (($T>2592000)); then    MO="$(bc <<< $T/60/60/24/30)mon, "    W="$(bc <<< $T/60/60/24%30/7)w, "    D="$(bc <<< $T/60/60/24%30%7)d"    #H="$(bc <<< $T/60/60%24)h"elif (($T>604800)); then    W="$(bc <<< $T/60/60/24/7)w, "    D="$(bc <<< $T/60/60/24%7)d, "    H="$(bc <<< $T/60/60%24)h"elif (($T>86400)); then    D="$(bc <<< $T/60/60/24)d, "    H="$(bc <<< $T/60/60%24)h "    #M="$(bc <<< $T/60%60)m"elif (($T>3600)); then    H="$(bc <<< $T/60/60)h "    M="$(bc <<< $T/60%60)m"else    M="$(printf %02d $(bc <<< $T/60%60))min"fiif [ "`grep -i -E "(apple|mac)" <<< "$MSG"`" ]; then    MSG=`sed "/^From: / {        n        i\        X-Warning: Potential Mac Idiot!    }" <<< "$MSG"`fiT="$Y$MO$W$D$H$M"sed "/^Date: / {    n    i\    X-Time-Since: $T}" <<< "$MSG"