Fancy login MOTD for the Raspberry Pi that can be placed in /etc/profile.d

motd.sh

#!/bin/bash

clear

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

function extend (){
	local str="$1"
	let spaces=60-${#1}
	while [ $spaces -gt 0 ]; do
		str="$str "
		let spaces=spaces-1
	done
	echo "$str"
}

function center (){
	local str="$1"
	let spacesLeft=(78-${#1})/2
	let spacesRight=78-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 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
}

borderColor=35
headerLeafColor=32
headerRaspberryColor=31
greetingsColor=36
statsLabelColor=33

borderLine="━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
borderTopLine=$(color $borderColor "┏$borderLine┓")
borderBottomLine=$(color $borderColor "┗$borderLine┛")
borderBar=$(color $borderColor "┃")
borderEmptyLine="$borderBar                                                                              $borderBar"

# Header
header="$borderTopLine\n$borderEmptyLine\n"
header="$header$borderBar$(color $headerLeafColor "          .~~.   .~~.                                                         ")$borderBar\n"
header="$header$borderBar$(color $headerLeafColor "         '. \ ' ' / .'                                                        ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "          .~ .~~~..~.                      _                          _       ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "         : .~.'~'.~. :     ___ ___ ___ ___| |_ ___ ___ ___ _ _    ___|_|      ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "        ~ (   ) (   ) ~   |  _| .'|_ -| . | . | -_|  _|  _| | |  | . | |      ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "       ( : '~'.~.'~' : )  |_| |__,|___|  _|___|___|_| |_| |_  |  |  _|_|      ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "        ~ .~ (   ) ~. ~               |_|                 |___|  |_|          ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "         (  : '~' :  )                                                        ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "          '~ .~~~. ~'                                                         ")$borderBar\n"
header="$header$borderBar$(color $headerRaspberryColor "              '~'                                                             ")$borderBar"

me=$(whoami)

# Greetings
greetings="$borderBar$(color $greetingsColor "$(center "Welcome back, $me!")")$borderBar\n"
greetings="$greetings$borderBar$(color $greetingsColor "$(center "$(date +"%A, %d %B %Y, %T")")")$borderBar"

# System information
read loginFrom loginIP loginMonth loginDay loginTime <<< $(last $me -2 -i| awk 'NR==2 { print $1, $3, $5, $6, $7 }')

loginDate="$loginMonth $loginDay $loginTime"
# TODO: Detect TTY login.
# TTY login
#if [[ $loginDate == - ]]; then
#  loginDate=$loginIP
#  loginIP=$loginFrom
#fi

if [[ $loginMonth != "" ]]; then
	#TODO: Get date formatting working
	#login="$(date -d $loginDate +"%A, %d %B %Y, %T") ($loginIP)"
	login="$loginDate ($loginIP)"
else
	# Not enough logins
	login="None"
fi

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

uptime="$(sec2time $(cut -d "." -f 1 /proc/uptime))"
uptime="$uptime ($(date -d "@"$(grep btime /proc/stat | cut -d " " -f 2) +"%d-%m-%Y %H:%M:%S"))"

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

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

label4="$(extend "$(df -h ~ | awk 'NR==2 { printf "Total: %sB, Used: %sB, Free: %sB",$2,$3,$4; }')")"
label4="$borderBar  $(color $statsLabelColor "Home space....:") $label4$borderBar"

# requires lm_sensors
#label5="$(extend "$(sensors -u | grep "temp1_input" | sed 's/.*: //' | xargs printf "%.1f")ºC")"
# alternative using rpi firmware
label5="$(extend "$(/opt/vc/bin/vcgencmd measure_temp | cut -c "6-9")ºC")"
label5="$borderBar  $(color $statsLabelColor "Temperature...:") $label5$borderBar"

network="$(extend "$(ifconfig | grep RX | grep -v dropped | awk '{ print "Total: " "Recieved " $3,$4 "," , "Transmitted " $6,$7 }' | sed -e s/'('//g | sed -e s/')'//g | head -1)")"
network="$borderBar  $(color $statsLabelColor "Network Usage.:") $network$borderBar"

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

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