motd

#!/bin/bash

clear

function color (){
  echo "\e[$1m$2\e[0m"
}

function center (){
  local str="$1"
  let spacesLeft=(60-${#1})/2
  let spacesRight=0-spacesLeft-${#1}
  while [ $spacesLeft -gt 0 ]; do
    str=" $str"
    let spacesLeft=spacesLeft-1
  done

  while [ $spacesRight -gt 0 ]; do
    str="$str "
    let spacesRight=spacesRight-1
  done

  echo "$str"
}

function hcenter {

text="$1"

cols=`tput cols`

IFS=$'\n'$'\r'
for line in $(echo -e $text); do

line_length=`echo $line| wc -c`
half_of_line_length=`expr $line_length / 2`
center=`expr \( $cols / 2 \) - $half_of_line_length`

spaces=""
for ((i=0; i < $center; i++)) {
spaces="$spaces "
}

echo "$spaces$line"

done

}

function sec2time (){
  local input=$1

  if [ $input -lt 60 ]; then
    echo "$input seconds"
  else
    ((days=input/86400))
    ((input=input%86400))
    ((hours=input/3600))
    ((input=input%3600))
    ((mins=input/60))

    local daysPlural="s"
    local hoursPlural="s"
    local minsPlural="s"

    if [ $days -eq 1 ]; then
      daysPlural=""
    fi

    if [ $hours -eq 1 ]; then
      hoursPlural=""
    fi

    if [ $mins -eq 1 ]; then
      minsPlural=""
    fi

    echo "$days day$daysPlural, $hours hour$hoursPlural, $mins minute$minsPlural"
  fi
}

read one five fifteen rest < /proc/loadavg

borderColor=0
headerLeafColor=32
headerRaspberryColor=31
greetingsColor=36
statsLabelColor=32

borderLine=""
borderTopLine=$(color $borderColor "$borderLine")
borderBottomLine=$(color $borderColor "$borderLine")
borderBar=$(color $borderColor "")
borderEmptyLine="$borderBar"

me=$(whoami)

# Greetings
greetings="\n$(color $greetingsColor "$(hcenter "Welcome back, $me!")")\n"
greetings="$greetings $(color $greetingsColor "$(hcenter "$(date +"%A, %d %B %Y, %I:%M:%S")")")\n"

# System information
read loginFrom loginIP loginDate <<< $(last $me iso -2 | awk 'NR==2 { print $2,$3,$4 }')

# TTY login
if [[ $loginDate == - ]]; then
  loginDate=$loginIP
  loginIP=$loginFrom
fi

# if [[ $loginDate == *T* ]]; then
   login="$(date -d $loginDate +"%A, %d %B %Y") ($loginIP)"
# else
#   # Not enough logins
#   login="None"
# fi

# Uptime
#uptime="$uptime ($(date -d "@"$(grep btime /proc/stat | cut -d " " -f 2) +"%d-%m-%Y %H:%M:%S"))"
uptime="$(sec2time $(cut -d "." -f 1 /proc/uptime))"
load1m=$(uptime | awk '{ print $10 }' | cut -c1-4)
load5m=$(uptime | awk '{ print $11 }' | cut -c1-4)
load15m=$(uptime | awk '{ print $12 }' | cut -c1-4)

label1="$login"
label1="  $(color $statsLabelColor "Last Login....:") $label1"

label2="$uptime"
label2="  $(color $statsLabelColor "Uptime........:") $label2"

label3="$(free -m | awk 'NR==2 { printf "Total: %sMB, Used: %sMB, Free: %sMB",$2,$3,$4; }')"
label3="  $(color $statsLabelColor "Memory........:") $label3"

label4="$(df -h /dev/sda5 | awk 'NR==2 { printf "Total: %sB, Used: %sB, Free: %sB",$2,$3,$4; }')"
label4="  $(color $statsLabelColor "Storage.......:") $label4"

label5="${load1m} (1min) ${load5m} (5min) ${load15m} (15min)"
label5="  $(color $statsLabelColor "Load Average..:") $label5"

label6="$(/opt/vc/bin/vcgencmd measure_temp | cut -c "6-9")ºC"
label6="  $(color $statsLabelColor "Temperature...:") $label6"

stats="$label1\n$label2\n$label3\n$label4\n$label5\n$label6"

# Print motd
echo -e "$greetings\n$stats\n"