#!/bin/bash
#
# armbianmonitor
#
# This script serves different purposes based on how it is called:
#
# - toggle boot verbosity (works)
# - monitoring mode: continually print monitoring info (WiP)
# - uploading /var/log/armbian-hardware-monitor.log to online pastebin service
#
# Without arguments called it should present a simple user
# interface that guides through:
#
# - installation of RPi-Monitor if not already installed by user
# - active basic or more verbose monitoring mode
# - provides monitoring parameters for connected disks
#
# The second part is WiP and all the user interaction part
# still completely missing.
#
# This script is used to configure armbianmonitor behaviour.
# It will ask the user whether to activate monitoring or not,
# whether to enable debug monitoring and also how to deal with
# connected disks. In fact it walks through the list of available
# disks, checks them, tries to patch hddtemp.db if necessary
# and provides a proposal for /etc/armbianmonitor/disks.conf
# when a new disk is found.
#
# In case monitoring should be activated the following file
# will be created: /etc/armbianmonitor/start-monitoring. If
# debug output has been chosen, then DEBUG will be written to
# the file.
#
# The script will install smartmontools/gdisk if not already
# installed and patches smartmontools' update-smart-drivedb
# script if necessary. For disks the 'device model' will be
# shown but internally we rely always on the GUID. This is the
# key for entry in /etc/armbianmonitor/disks.conf
#
# When the script exits and the user activated monitoring it
# recommends doing a restart since on the next reboot the
# setup-armbian-monitoring-environment script will configure
# monitoring sources and decides based on the existence and
# contents of /etc/armbianmonitor/start-monitoring whether
# rpimonitord should be started or not.
#
# The format of /etc/armbianmonitor/disks.conf is as follows:
#
# ${GUID}:${Name}:${smartctl prefix}:${temp call}:${CRC}:${LCC}
#
# Two examples:
#
# A57BF307-7D82-4783-BD1D-B346CA8C195B:WD Green::199:193 # WD HDD on SATA
# F8D372DC-63DB-494B-B802-87DC47FAD4E1:Samsung EVO:sat::199: # SSD in USB enclosure
#
# - GUID is the GUID as determined by gdisk
# - 'Name': The name as it will later be shown in RPi-Monitor, defaults to
#   the 'device model' read out through smartctl but can be changed to
#   be more significant (beware that this string must contain colons!)
# - "smartctl prefix" can be empty or should be the the necessary prefix for
#   USB disks, eg. '-d sat' or '-d usbjmicron' and so on -- please have a
#   look at https://www.smartmontools.org/wiki/Supported_USB-Devices
# - "temp call" when being omitted indicates that hddtemp should be used.
#   Otherwise it should contain the complete command line ('DISK' will be
#   dynamically replaced by the device node when the actual monitoring
#   happens), for example:
#   /sbin/hdparm -C DISK | grep -Eq "standby|sleeping" || \
#   /usr/sbin/smartctl -d sat -a DISK | awk -F" " '/Temperature_Cel/ {printf $10}'
# - 'CRC attribute': The decimal value of the S.M.A.R.T. attribute that
#   is used to store the count of checksum errors between disk and host
#   controller (might be omitted if the drive doesn't support it)
# - 'LCC attribute': The decimal value of the S.M.A.R.T. attribute that
#   should contain the load cycle counter value (might be omitted
#   if the drive doesn't support it)
#
# TODO:
#
# - develop main functionality ;) asking the user regarding monitoring
# - deal with 'SMART overall-health self-assessment test result:'
# - write documentation
#
############################################################################

Main() {
	export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

	# check if stdout is a terminal...
	if test -t 1; then
		# see if it supports colors...
		ncolors=$(tput colors)
		if test -n "$ncolors" && test $ncolors -ge 8; then
			BOLD="$(tput bold)"
			NC='\033[0m' # No Color
			LGREEN='\033[1;32m'
			LRED='\e[0;91m'
		fi
	fi

	[ $# -eq 0 ] && (DisplayUsage ; exit 0)

	ParseOptions "$@"

	exit 0
	PreRequisits

	# check whether user runs rpimonitord on his own or we activated it
	if [ -f /etc/armbianmonitor/start-monitoring ]; then
		# we should already provide monitoring, check whether DEBUG
		# is also set
		ArmbianMonitoring=TRUE
		read -r DebugMode </etc/armbianmonitor/start-monitoring 2>/dev/null
	fi

	# check whether rpimonitord is running and compare with ${ArmbianMonitoring}
	# In case the user chose to run rpimonitord on his own, we skip the config
	# part and only output disk info
	:

	# check available disk devices
	CheckDisks
} # Main

ParseOptions() {
	while getopts 'hHbBuUrRmMsnNd:Dc:C:pPvz' c ; do
	case ${c} in
		H)
			# display full help test
			# export FullUsage=TRUE
			DisplayUsage
			exit 0
			;;
		h)
			# display short help
			DisplayUsage
			exit 0
			;;
		m|M|s)
			# monitoring mode, -s is for internal usage (debug log upload)
			interval=$2
			MonitorMode ${OPTARG}
			exit 0
			;;
		n|N)
			# network monitoring mode
			rf1=$2
			NetworkMonitorMode ${OPTARG}
			exit 0
			;;
		u)
                        # Upload /var/log/armbian-hardware-monitor.log with additional support info
                        which curl >/dev/null 2>&1 || apt-get -f -qq -y install curl
                        echo -e "System diagnosis information will now be uploaded to \c"
                        fping paste.armbian.com 2>/dev/null | grep -q alive
                        if [ $? != 0 ]; then
                                echo -e "\nNetwork/firewall problem detected.\nTrying fallback..." >&2
                                fping ix.io 2>/dev/null | grep -q alive
                                if [ $? != 0 ]; then
                                        echo -e "\nNetwork/firewall problem detected. Not able to upload debug info.\nPlease fix this or use \"-U\" instead and upload ${BOLD}whole output${NC} manually to an online pasteboard service\nand provide the URL in the forum where you have been asked for this.\n"
					exit 1
                                fi

                                # we obfuscate IPv4 addresses somehow but not too much, MAC addresses have to remain
                                # in clear since otherwise the log becomes worthless due to randomly generated
                                # addresses here and there that might conflict
	                        CollectSupportInfo \
                                | sed -E 's/([0-9]{1,3}\.)([0-9]{1,3}\.)([0-9]{1,3}\.)([0-9]{1,3})/XXX.XXX.\3\4/g' \
                                | curl -F 'f:1=<-' ix.io
                                echo -e "Please post the URL in the forum where you've been asked for.\n"
	                        exit 0
                        fi

                        # we obfuscate IPv4 addresses somehow but not too much, MAC addresses have to remain
                        # in clear since otherwise the log becomes worthless due to randomly generated
                        # addresses here and there that might conflict
                        CollectSupportInfo \
                        | sed -E 's/([0-9]{1,3}\.)([0-9]{1,3}\.)([0-9]{1,3}\.)([0-9]{1,3})/XXX.XXX.\3\4/g' \
                        | curl -s --data-binary @- "https://paste.armbian.com/documents" \
                        | awk -F'"' '{ print "https://paste.armbian.com/" $4 }'
                        echo -e "Please post the URL in the forum where you've been asked for.\n"
                        exit 0
                        ;;

                U)
			# Send support info to stdout to be uploaded manually. Add line numbers to prevent
			# users being creative and supressing everything that's important
			CollectSupportInfo \
				| sed -E 's/([0-9]{1,3}\.)([0-9]{1,3}\.)([0-9]{1,3}\.)([0-9]{1,3})/XXX.XXX.\3\4/g' \
				| awk '!NF{$0=" "}1' | nl -
			echo -e "\nPlease upload the ${BOLD}whole output${NC} above to an online pasteboard service\nand provide the URL in the forum where you have been asked for this.\n"
			exit 0
			;;
		r|R)
			# Installs RPi-Monitor and patches templates (heavily on sun8i)
			fping armbian.com 2>/dev/null | grep -q alive || \
				(echo "Network/firewall problem detected. Please fix this prior to installing RPi-Monitor." >&2 ; exit 1)
			InstallRPiMonitor
			case $(awk '/Hardware/ {print $3$4}' </proc/cpuinfo) in
				*sun8i*)
					PatchRPiMonitor_for_sun8i
					case $(uname -r) in
						3.4.*)
							sed -i 's|H3_Extended_Mainline.conf|H3_Extended.conf|' /etc/rpimonitor/template/OrangePi_H3.conf
							systemctl restart rpimonitor >/dev/null 2>&1
							;;
					esac
					;;
				*)
					# On other SoCs than H3 make minor adjustments to config to reflect Armbian reality:
					. /etc/armbian-release
					sed -e "s/^web.status.1.name=.*/web.status.1.name=$BOARD_NAME/" \
						-e "s/^web.statistics.1.name=.*/web.statistics.1.name=$BOARD_NAME/" \
						</etc/rpimonitor/template/raspbian.conf >/etc/rpimonitor/template/armbian.conf
					cd /etc/rpimonitor/
					ln -sf /etc/rpimonitor/template/armbian.conf data.conf
					# fix temperature everywhere
					sed -i -e 's|^dynamic.12.source=.*|dynamic.12.source=/etc/armbianmonitor/datasources/soctemp|' \
						-e 's|^dynamic.12.postprocess=.*|dynamic.12.postprocess=sprintf("%.1f", $1/1000)|' \
						/etc/rpimonitor/template/temperature.conf
					# monitor big cores on big.LITTLE
					if [ $(grep -c '^processor' /proc/cpuinfo) -ge 4 ]; then
						sed -i 's|/sys/devices/system/cpu/cpu0/cpufreq/|/sys/devices/system/cpu/cpu4/cpufreq/|g' \
						/etc/rpimonitor/template/cpu.conf
					fi
					# display processor architecture instead of undefined
					sed -i -e "s_^static.4.source=.*_static.4.source=lscpu | awk -F' ' '/^Architecture/ {print \$2}'_" \
						-e "s/^static.4.regexp=.*/static.4.regexp=/" /etc/rpimonitor/template/version.conf
					;;
			esac
			echo -e "\nNow you're able to enjoy RPi-Monitor at http://$(ip a | awk -F" " '/inet / {print $2}' | grep -v '127.0.0.1' | cut -f1 -d/ | head -n1):8888"
			exit 0
			;;
		p|P)
			# Installs cpuminer on 32-bit platforms
			dpkg --print-architecture | grep -q armhf || (echo -e "Functionality currently not supported on 64-bit platforms. Exiting\n" >&2 ; exit 1)
			fping armbian.com 2>/dev/null | grep -q alive || \
				(echo "Network/firewall problem detected. Please fix this prior to installing cpuminer." >&2 ; exit 1)
			cd /usr/local/src/
			wget http://downloads.sourceforge.net/project/cpuminer/pooler-cpuminer-2.4.5.tar.gz
			tar xf pooler-cpuminer-2.4.5.tar.gz && rm pooler-cpuminer-2.4.5.tar.gz
			cd cpuminer-2.4.5/
			apt-get -f -qq -y install libcurl4-gnutls-dev
			./configure CFLAGS="-O3 -mfpu=neon"
			make && make install
			echo -e "\n\nNow you can use /usr/local/bin/minerd to do automated benchmarking.\nIn case you also installed RPi-Monitor you can do a"
			echo -e "\n    touch /root/.cpuminer\n\nto ensure minerd is running after reboot and results are recorded\nwith RPi-Monitor"
			exit 0
			;;
		d)
			# monitors write activity to disk
			MonitorIO "${OPTARG}"
			exit 0
			;;
		D)
			fping ix.io 2>/dev/null | grep -q alive || \
				(echo "Network/firewall problem detected. Please fix this prior to installing RPi-Monitor." >&2 ; exit 1)
			DebugOutput="$(mktemp /tmp/${0##*/}.XXXXXX)"
			trap "rm \"${DebugOutput}\" ; exit 0" 0 1 2 3 15
			set -x
			exec 2>"${DebugOutput}"
			PreRequisits >/dev/null 2>&1
			CheckDisks
			which curl >/dev/null 2>&1 || apt-get -f -qq -y install curl
			echo -e "\nDebug output has been collected at the following URL: \c"
			(cat "${DebugOutput}"; echo -e "\n\n\ngdisk.txt contents:\n" ; cat "${MyTempDir}/gdisk.txt" ;\
				echo -e "\n\n\nsmartctl.txt contents:\n" ; cat "${MyTempDir}/smartctl.txt") \
				| curl -F 'f:1=<-' ix.io
			echo -e "Please post the URL in the Armbian forum where you've been asked for."
			exit 0
			;;
		c|C)
			# check card mode
			CheckCard "${OPTARG}"
			exit 0
			;;
		v)
			# Verify installation integrity
			VerifyRepairExcludes="/etc/|/boot/|cache|getty|/var/lib/smartmontools/"
			VerifyInstallation
			exit 0
			;;
		z)
			# Do a quick 7-zip benchmark to estimate CPU performance
			runs=$2
			Run7ZipBenchmark 2>/dev/null
			exit 0
			;;
	esac
	done
} # ParseOptions

DisplayUsage() {
	echo -e "Usage: ${BOLD}${0##*/} [-h] [-b] [-c \$path] [-d \$device] [-D] [-m] [-p] [-r] [-u]${NC}\n"
	echo -e "############################################################################"
	if [ ${FullUsage} ]; then
		echo -e "\nDetailed Description:"
		grep "^#" "$0" | grep -v "^#\!/bin/bash" | sed 's/^#//'
	fi
	echo -e "\n Use ${BOLD}armbianmonitor${NC} for the following tasks:\n"
	echo -e " armbianmonitor ${BOLD}-c /path/to/test${NC} performs disk health/performance tests"
	echo -e " armbianmonitor ${BOLD}-d${NC} monitors writes to \$device"
	echo -e " armbianmonitor ${BOLD}-D${NC} tries to upload debug disk info to improve armbianmonitor"
	echo -e " armbianmonitor ${BOLD}-m${NC} provides simple CLI monitoring - scrolling output"
	echo -e " armbianmonitor ${BOLD}-M${NC} provides simple CLI monitoring - fixed-line output"
	echo -e " armbianmonitor ${BOLD}-n${NC} provides simple CLI network monitoring - scrolling output"
	echo -e " armbianmonitor ${BOLD}-N${NC} provides simple CLI network monitoring - fixed-line output"
	echo -e " armbianmonitor ${BOLD}-p${NC} tries to install cpuminer for performance measurements"
	echo -e " armbianmonitor ${BOLD}-r${NC} tries to install RPi-Monitor"
	echo -e " armbianmonitor ${BOLD}-u${NC} tries to upload armbian-hardware-monitor.log for support purposes"
	echo -e " armbianmonitor ${BOLD}-v${NC} tries to verify installed package integrity"
	echo -e " armbianmonitor ${BOLD}-z${NC} runs a quick 7-zip benchmark to estimate CPU performance\n"
	echo -e "############################################################################\n"
} # DisplayUsage

MonitorMode() {
	# $1 is the time in seconds to pause between two prints, defaults to 5 seconds
	# This functions prints out endlessly:
	# - time/date
	# - average 1m load
	# - detailed CPU statistics
	# - Soc temperature if available
	# - PMIC temperature if available
	# - DC-IN voltage if available

	# Allow armbianmonitor to return back to armbian-config
	trap "echo ; exit 0" 0 1 2 3 15

	# Try to renice to 19 to not interfere with OS behaviour
	renice 19 $BASHPID >/dev/null 2>&1

	LastUserStat=0
	LastNiceStat=0
	LastSystemStat=0
	LastIdleStat=0
	LastIOWaitStat=0
	LastIrqStat=0
	LastSoftIrqStat=0
	LastCpuStatCheck=0
	LastTotal=0

	SleepInterval=${interval:-5}

	Sensors="/etc/armbianmonitor/datasources/"
	if [ -f /sys/devices/system/cpu/cpu4/cpufreq/scaling_cur_freq ]; then
		DisplayHeader="Time    CPU_cl0/CPU_cl1  load %cpu %sys %usr %nice %io %irq"
		CPUs=dual_cluster
		echo "Two CPU clusters are available for monitoring"
	elif [ -f /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq ]; then
		DisplayHeader="Time        CPU    load %cpu %sys %usr %nice %io %irq"
		CPUs=normal
	else
		DisplayHeader="Time      CPU n/a    load %cpu %sys %usr %nice %io %irq"
		CPUs=notavailable
	fi

	[ -f "${Sensors}/soctemp" ] && DisplayHeader="${DisplayHeader}   Tcpu" || SocTemp='n/a'
	[ -f "${Sensors}/pmictemp" ] && DisplayHeader="${DisplayHeader}   PMIC" || PMICTemp='n/a'
	DCIN=$(CheckDCINVoltage)
	[ -f "${DCIN}" ] && DisplayHeader="${DisplayHeader}   DC-IN" || DCIN='n/a'
	[ -f /sys/devices/virtual/thermal/cooling_device0/cur_state ] \
		&& DisplayHeader="${DisplayHeader}  C.St." || CoolingState='n/a'
	echo -e "Stop monitoring using [ctrl]-[c]"
	[ $(echo "${SleepInterval} * 10" | bc | cut -d. -f1) -le 15 ] \
		&& echo "Warning: High update frequency (${SleepInterval} sec) might change system behaviour!"
	echo -e "${DisplayHeader}"
	Counter=0
	while true ; do
		if [ "$c" == "m" ]; then
			let Counter++
			if [ ${Counter} -eq 15 ]; then
				printf "\n\n%s" "$DisplayHeader"
				Counter=0
			fi
		elif [ "$c" == "s" ]; then
			# internal mode for debug log upload
			let Counter++
			if [ ${Counter} -eq 6 ]; then
				exit 0
			fi
		else
			printf "\x1b[1A"
		fi
		LoadAvg=$(cut -f1 -d" " </proc/loadavg)
		case ${CPUs} in
			dual_cluster)
				Cluster1=$(awk '{printf ("%0.0f",$1/1000); }' </sys/devices/system/cpu/cpu4/cpufreq/scaling_cur_freq) 2>/dev/null
				Cluster0=$(awk '{printf ("%0.0f",$1/1000); }' </sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq) 2>/dev/null
				ProcessStats
				printf "\n%s  %4s/%4s MHz %5s %s" "$(date "+%H:%M:%S")" "$Cluster0" "$Cluster1" "$LoadAvg" "$procStats"
				;;
			normal)
				CpuFreq=$(awk '{printf ("%0.0f",$1/1000); }' </sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq) 2>/dev/null
				ProcessStats
				printf "\n%s  %4s MHz %5s %s" "$(date "+%H:%M:%S")" "$CpuFreq" "$LoadAvg" "$procStats"
				;;
			notavailable)
				ProcessStats
				printf "\n%s    ---     %5s %s" "$(date "+%H:%M:%S")" "$LoadAvg" "$procStats"
				;;
		esac
		if [ "X${SocTemp}" != "Xn/a" ]; then
			read -r SocTemp <"${Sensors}/soctemp"
			if [ ${SocTemp} -ge 1000 ]; then
				SocTemp=$(awk '{printf ("%0.1f",$1/1000); }' <<<${SocTemp})
			fi
			printf "  %4s °C" "$SocTemp"
		fi
		if [ "X${PMICTemp}" != "Xn/a" ]; then
			read -r PMICTemp <"${Sensors}/pmictemp"
			if [ ${PMICTemp} -ge 1000 ]; then
				PMICTemp=$(awk '{printf ("%0.1f",$1/1000); }' <<<${PMICTemp})
			fi
			printf "  %4s °C" "$PMICTemp"
		fi
		if [ "X${DCIN}" != "Xn/a" ]; then
			case "${DCIN##*/}" in
				in_voltage2_raw)
					# Tinkerboard S
					read -r RAWvoltage <"${DCIN}"
					DCINvoltage=$(echo "(${RAWvoltage} / ((82.0/302.0) * 1023.0 / 1.8)) + 0.1" | bc -l)
					;;
				*)
					DCINvoltage=$(awk '{printf ("%0.2f",$1/1000000); }' <"${DCIN}")
					;;
			esac
			printf "  %5sV" "$DCINvoltage"
		fi
		[ "X${CoolingState}" != "Xn/a" ] && \
		printf "  %d/%d" "$(cat /sys/devices/virtual/thermal/cooling_device0/cur_state)" "$(cat /sys/devices/virtual/thermal/cooling_device0/max_state)"
		[ "$c" == "s" ] && sleep 0.3 || sleep ${SleepInterval}
	done
} # MonitorMode

CheckDCINVoltage() {
	for i in /sys/devices/platform/sunxi-i2c.0/i2c-0/0-0034/axp20-supplyer.28/power_supply/usb/voltage_now \
		/sys/power/axp_pmu/vbus/voltage \
		/sys/devices/platform/sunxi-i2c.0/i2c-0/0-0034/axp20-supplyer.28/power_supply/ac/voltage_now \
		/sys/power/axp_pmu/ac/voltage '/sys/bus/iio/devices/iio:device0/in_voltage2_raw' ; do
		if [ -f $i ]; then
			read -r DCINvoltage <$i 2>/dev/null
			if [ ${DCINvoltage} -gt 4080000 ]; then
				echo $i
				break
			fi
		fi
	done
} # CheckDCINVoltage

ProcessStats() {
	if [ -f /tmp/cpustat ]; then
		# RPi-Monitor/Armbianmonitor already running and providing processed values
		set $(awk -F" " '{print $1"\t"$2"\t"$3"\t"$4"\t"$5"\t"$6}' </tmp/cpustat)
		CPULoad=$1
		SystemLoad=$2
		UserLoad=$3
		NiceLoad=$4
		IOWaitLoad=$5
		IrqCombinedLoad=$6		
	else
		procStatLine=(`sed -n 's/^cpu\s//p' /proc/stat`)
		UserStat=${procStatLine[0]}
		NiceStat=${procStatLine[1]}
		SystemStat=${procStatLine[2]}
		IdleStat=${procStatLine[3]}
		IOWaitStat=${procStatLine[4]}
		IrqStat=${procStatLine[5]}
		SoftIrqStat=${procStatLine[6]}

		Total=0
		for eachstat in ${procStatLine[@]}; do
			Total=$(( Total + eachstat ))
		done

		UserDiff=$(( UserStat - LastUserStat ))
		NiceDiff=$(( NiceStat - LastNiceStat ))
		SystemDiff=$(( SystemStat - LastSystemStat ))
		IOWaitDiff=$(( IOWaitStat - LastIOWaitStat ))
		IrqDiff=$(( IrqStat - LastIrqStat ))
		SoftIrqDiff=$(( SoftIrqStat - LastSoftIrqStat ))
		
		diffIdle=$(( IdleStat - LastIdleStat ))
		diffTotal=$(( Total - LastTotal ))
		diffX=$(( diffTotal - diffIdle ))
		CPULoad=$(( diffX * 100 / diffTotal ))
		UserLoad=$(( UserDiff * 100 / diffTotal ))
		SystemLoad=$(( SystemDiff * 100 / diffTotal ))
		NiceLoad=$(( NiceDiff * 100 / diffTotal ))
		IOWaitLoad=$(( IOWaitDiff * 100 / diffTotal ))
		IrqCombined=$(( IrqDiff + SoftIrqDiff ))
		IrqCombinedLoad=$(( IrqCombined * 100 / diffTotal ))

		LastUserStat=${UserStat}
		LastNiceStat=${NiceStat}
		LastSystemStat=${SystemStat}
		LastIdleStat=${IdleStat}
		LastIOWaitStat=${IOWaitStat}
		LastIrqStat=${IrqStat}
		LastSoftIrqStat=${SoftIrqStat}
		LastTotal=${Total}
	fi
	procStats=$(printf "%3s%%%4s%%%4s%%%4s%%%4s%%%4s%%\n" "$CPULoad" "$SystemLoad" "$UserLoad" "$NiceLoad" "$IOWaitLoad" "$IrqCombinedLoad")
} # ProcessStats

MonitorIO() {
	LastPagesOut=$(awk '/pgpgout/ {print $2}' </proc/vmstat)
	if grep -q "$1" /proc/diskstats; then
		LastWrite=$(awk -v d="$1" '{if($3 == d) print $8}' </proc/diskstats)
	else
		echo "Bud argument: [$1]"
		echo "Disks valid for monitoring: $(
			awk '{if($8 != 0) printf "%s ", $3}' /proc/diskstats
			)"
		exit 1
	fi
	LastTimeChecked=$(date "+%s")
	while true ; do
		CurrentWrite=$(awk -v d="$1" '{if($3 == d) print $8}' </proc/diskstats)
		if [ ${CurrentWrite} -gt ${LastWrite} ]; then
			PagesOut=$(awk '/pgpgout/ {print $2}' </proc/vmstat)
			TimeNow=$(date "+%s")
			PagesWritten=$((CurrentWrite - LastWrite))
			PageOuts=$((PagesOut - LastPagesOut))
			echo -e "$(LANG=C date)$(printf "%8s" ${PagesWritten})/${PageOuts} pages written after $((TimeNow - LastTimeChecked)) sec"
			LastTimeChecked=${TimeNow}
			LastPagesOut=${PagesOut}
			LastWrite=${CurrentWrite}
		fi
		sleep 1
	done
} # MonitorIO

CheckDisks() {
	# This function walks through all block devices whose name starts with sd* and
	# then gets the name hddtemp expects, the model name from smartctl, looks whether
	# the drive only lists one temperature value and patches hddtemp.db if necessary
	# and also tries to get CRC and LCC S.M.A.R.T. attributes to provide the user
	# with the necessary config file contents for /etc/armbianmonitor/disks.conf:
	
	ls /sys/block/sd* >/dev/null 2>&1 || exit 0
	
	for i in /sys/block/sd* ; do
		DeviceNode=/dev/${i##*/}
		# get GUID/UUID for disk and check whether a partition table is existent. If
		# not GUID will always be random
		gdisk -l ${DeviceNode} >"${MyTempDir}/gdisk.txt"
		GUID=$(awk -F" " '/^Disk identifier/ {print $4}' <"${MyTempDir}/gdisk.txt")
		CountOfUnavailablePartitionTables=$(grep ': not present' "${MyTempDir}/gdisk.txt" | wc -l)
		if [ ${CountOfUnavailablePartitionTables} -eq 4 ]; then
			echo -e "\nSkipping ${DeviceNode} due to missing partition table. Use parted to create one."
			break
		else
			printf "\nExamining %s with GUID %s" "$DeviceNode" "$GUID"
		fi
		
		# get name hddtemp needs
		HddtempName="$(hddtemp --debug ${DeviceNode} | awk -F": " '/^Model: / {print $2}' | \
			cut -c-40 | sed 's/^[ \t]*//;s/[ \t]*$//')"
		# store smartctl output in temporary file
		smartctl -q noserial -s on -a ${DeviceNode} >"${MyTempDir}/smartctl.txt" 2>&1
		DeviceModel="$(awk -F": " '/^Device Model/ {print $2}' <"${MyTempDir}/smartctl.txt" | \
			sed 's/^[ \t]*//;s/[ \t]*$//')"
		if [ "X${DeviceModel}" = "X" ]; then
			# Reading S.M.A.R.T. failed, we try autodetect mode iterating through all
			# known smartctl modes (-d auto|sat|usbcypress|usbjmicron|usbprolific|usbsunplus)
			SMARTPrefix="$(CheckSMARTModes ${DeviceNode} 2>/dev/null)"
			if [ "X${SMARTPrefix}" = "X" ]; then
				# we can't query the disk. Time to give up
				echo -e "\nUnable to query the disk through S.M.A.R.T.\nPlease investigate manually using smartctl\n"
				break
			fi
		fi
		
		# user feedback
		if [ "X${SMARTPrefix}" = "X" ]; then
			echo -e " \n(accessible through S.M.A.R.T.)"
		else
			echo -e " \n(can be queried with \"-d ${SMARTPrefix}\" through S.M.A.R.T.)"
		fi

		# check for CRC and LCC attributes
		CRCAttribute=$(awk -F" " '/CRC_Error_Count/ {print $1}' <"${MyTempDir}/smartctl.txt")
		LCCAttribute=$(grep -i "load.cycle" "${MyTempDir}/smartctl.txt" | awk -F" " '{print $1}')
		
		# check whether /etc/hddtemp.db should be patched
		grep -q "${HddtempName}" /etc/hddtemp.db
		if [ $? -ne 0 ]; then
			# No entry into hddtemp database, we've a look whether there's a 'temperature'
			# attribute available (we take the 1st we find) and if that's the case we use this
			DiskTemp=$(awk -F" " '/Temperature/ {print $1}' <"${MyTempDir}/smartctl.txt" | head -n1)
			if [[ ${DiskTemp} -gt 0 ]]; then
				echo -e "\"${HddtempName}\" ${DiskTemp} C \"${DeviceModel}\"" >>/etc/hddtemp.db
				echo -e "\nAdded disk \"${DeviceModel}\"/\"${HddtempName}\" to /etc/hddtemp.db using S.M.A.R.T. attribute ${DiskTemp}\nbased on the following available thermal values:"
				grep "Temperature" "${MyTempDir}/smartctl.txt"
				# check hddtemp result
				HddtempResult=$(hddtemp -n ${DeviceNode} | grep -v 'not available' | awk -F" " '{print $1}')
				if [ "X${HddtempResult}" != "X${DeviceNode}:" ]; then
					# hddtemp isn't able to query the disk
					HddtempStatus="does not work. Please check with smartctl and adjust config accordingly"
					echo -e "\nhddtemp output: $(hddtemp ${DeviceNode})"
					echo -e "\nIt seems we can not rely on hddtemp to query this disk. Please try smartctl instead\n"
				else
					HddtempStatus="will work"
					echo -e "\nhddtemp output: ${HddtempResult})"
					echo -e "\nIn case this seems not to be correct please adjust /etc/hddtemp.db manually\n"
				fi
			else
				HddtempStatus="does not work. Please check with smartctl and adjust config accordingly"
			fi
		else
			HddtempStatus="will work"
		fi
		
		# check for firmware updates
		FirmwareUpdate="$(grep "^http" "${MyTempDir}/smartctl.txt")"
		
		# Check whether the disk (based on GUID) is already configured in our config file
		# /etc/armbianmonitor/disks.conf or not
		
		grep -q "^${GUID}:" /etc/armbianmonitor/disks.conf >/dev/null 2>/dev/null
		case $? in
			0)
				# already listed, we provide just infos:
				echo -e "Disk is already configured by the following monitoring config:\n$(grep "^${GUID}:" /etc/armbianmonitor/disks.conf)\n"
				;;
			*)
				# new disk, we recommend an entry for /etc/armbianmonitor/disks.conf
				echo -e "Disk not configured for monitoring. We were able to extract the following \ninformation:\n   GUID: ${GUID}"
				if [ "X${SMARTPrefix}" != "X" ]; then
					echo -e "   QueryMode: -d ${SMARTPrefix}"
				fi
				echo -e "   hddtemp: ${HddtempStatus}\n   CRC attribute: ${CRCAttribute}\n   LCC Attribute: ${LCCAttribute}"
				case ${HddtempStatus} in
					"will work")
						echo -e "If you want to monitor the disk please add to /etc/armbianmonitor/disks.conf:\n${GUID}:${DeviceModel}:${SMARTPrefix}::${CRCAttribute}:${LCCAttribute}"
						;;
					*)
						echo -e "Proposal for /etc/armbianmonitor/disks.conf:\n${GUID}:${DeviceModel}:${SMARTPrefix}:FIXME:${CRCAttribute}:${LCCAttribute}"
						echo -e "You have to figure out how to query the disk for its thermal sensor."
						echo -e "Please check the output of \"hddtemp --debug ${DeviceNode}\" and smartctl\n"
						;;
				esac		
				;;
		esac
		if [ "X${FirmwareUpdate}" != "X" ]; then
			echo -e "\nWARNING: A firmware update seems to be available:\n${FirmwareUpdate}\n"
		fi
	done
} # CheckDisks

CheckSMARTModes() {
	# This function tries to access USB disks through S.M.A.R.T. and returns the necessary
	# '-d' call as well as fills in ${MyTempDir}/smartctl.txt
	
	for i in auto sat usbcypress usbjmicron usbprolific usbsunplus ; do
		# user feedback
		# echo -n "." >/dev/tty
		# query disk using the specific protocol
		echo -n "" >"${MyTempDir}/smartctl.txt"
		smartctl -q noserial -s on -d ${i} -a ${1} >"${MyTempDir}/smartctl.txt" 2>/dev/null
		DeviceModel="$(awk -F": " '/^Device Model/ {print $2}' <"${MyTempDir}/smartctl.txt" | \
			sed 's/^[ \t]*//;s/[ \t]*$//')"
		if [ "X${DeviceModel}" != "X" ]; then
			echo ${i}
			break
		fi
	done
} # CheckSMARTModes

PreRequisits() {
	# Ensure that we're running as root since otherwise querying SATA/USB disks won't work
	if [ "$(id -u)" != "0" ]; then
		echo "This script must be run as root" >&2
		exit 1
	fi

	export PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
	unset LANG
	DISTROCODE=$(lsb_release -s -c)
	
	# check whether gdisk/smartctl are available and up to date
	echo -e "Check whether necessary software is available\c"
	which gdisk >/dev/null 2>&1 || (echo -e " Installing gdisk\c" ; apt-get -f -qq -y install gdisk)
	which smartctl >/dev/null 2>&1 || (echo -e " Installing smartmontools\c" ; apt-get -f -qq -y install smartmontools)
	echo -e " [done]\nUpdating smartmontools' drivedb\c"
	/usr/sbin/update-smart-drivedb >/dev/null 2>&1
	if [ $? -ne 0 -a "X${DISTROCODE}" = "Xwheezy" ]; then
		sed -i "/^SRCEXPR/{s#=.*#='http://sourceforge.net/p/smartmontools/code/HEAD/tree/\$location/smartmontools/drivedb.h?format=raw'#}" /usr/sbin/update-smart-drivedb
		/usr/sbin/update-smart-drivedb
	fi
	echo -e " [done]"
	CreateTempDir
} # PreRequisits

CreateTempDir() {
	# create a safe temporary dir
	MyTempDir=$(mktemp -d /tmp/${0##*/}.XXXXXX)
	if [ ! -d "${MyTempDir}" ]; then
		MyTempDir=/tmp/${0##*/}.$RANDOM.$RANDOM.$RANDOM.$$
		(umask 066 && mkdir ${MyTempDir}) || (echo "Failed to create temp dir. Aborting" >&2 ; exit 1)
	fi
	chmod 711 "${MyTempDir}"
	trap "rm -rf \"${MyTempDir}\" ; exit 0" 0 1 2 3 15
	for file in smartctl.txt gdisk.txt ; do
		touch "${MyTempDir}/${file}"
		chmod 644 "${MyTempDir}/${file}"
	done
} #CreateTempFiles

InstallRPiMonitor() {
	# Installs rpimonitord loosely based on the official instructions from
	# http://rpi-experiences.blogspot.fr/p/rpi-monitor-installation.html
	# but using the package from our own repository
	if [ "$(id -u)" != "0" ]; then
		echo "Installing RPi-Monitor requires root privileges, try sudo please. Exiting" >&2
		exit 1
	fi
	echo -e "Installing RPi-Monitor. This can take up to 5 minutes. Be patient please\c"
	apt-get -qq -y update
	apt-get -f -qq -y install rpimonitor
	/usr/share/rpimonitor/scripts/updatePackagesStatus.pl &
} # InstallRPiMonitor

PatchRPiMonitor_for_sun8i() {
	echo -e "\nNow patching RPi-Monitor to deal correctly with H3"
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K7qd4dHdmNB1zKYXCTyt5+Ab5Aoi6bRlcE1YWjZZ6rq+HvP7ivxGbegre891Rv5bvLZG5DXGGo6R
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gwYNGjRo0KBBw1eEfwH4UoBHAKAAAA==" | base64 --decode | tar xzf -
	which systemctl >/dev/null 2>&1
	case $? in
		0)
			# Jessie|Stretch|Xenial|Bionic
			systemctl enable rpimonitor-helper >/dev/null 2>&1
			systemctl start rpimonitor-helper >/dev/null 2>&1
			systemctl restart rpimonitor >/dev/null 2>&1
			;;
		*)
			# Wheezy|Trusty
			insserv rpimonitor-helper >/dev/null 2>&1 || update-rc.d rpimonitor-helper defaults 90 10 >/dev/null 2>&1
			cd /tmp && nohup /usr/local/sbin/rpimonitor-helper.sh & >/dev/null 2>&1
			/etc/init.d/rpimonitor stop >/dev/null 2>&1
			/etc/init.d/rpimonitor start >/dev/null 2>&1
			;;
	esac
} # PatchRPiMonitor_for_sun8i

CollectSupportInfo() {
	[[ -s /var/log/armbian-hardware-monitor.log ]] && cat /var/log/armbian-hardware-monitor.log || zcat /var/log/armbian-hardware-monitor.log.1.gz 2>/dev/null
	[[ -f /boot/armbianEnv.txt ]] && LOGLEVEL=$(awk -F'=' '/^verbosity/ {print $2}' /boot/armbianEnv.txt)
	LOGLEVEL=${LOGLEVEL:-1}
	if [ ${LOGLEVEL} -gt 4 ]; then
		VERBOSE='-v'
		which lshw >/dev/null 2>&1 && (echo -e "\n### lshw:" ; lshw -quiet -sanitize -numeric)
	fi
	lsusb >/dev/null 2>&1 && (echo -e "\n### lsusb:\n" ; lsusb ${VERBOSE} 2>/dev/null ; echo "" ; lsusb -t 2>/dev/null)
	lspci >/dev/null 2>&1 && (echo -e "\n### lspci:\n" ; lspci ${VERBOSE} 2>/dev/null)
	nvme >/dev/null 2>&1 && (echo -e "\n### nvme:\n" ; nvme list 2>/dev/null)
	[ -z $SUDO_USER ] || echo -e "\n### Group membership of $(groups $SUDO_USER)"
	echo -e "\n### Userland:\n\n$(grep PRETTY_NAME /etc/os-release)"
	echo -e "\n### Installed packages:\n\n$(dpkg -l | grep -E "openmediavault|armbian| linux-")"
	KernelVersion=$(awk -F" " '{print $3}' < /proc/version)
	case ${KernelVersion} in
		3.*)
			[[ -e /boot/script.bin ]] && echo -e "\n### fex settings: $(ls -la /boot/script.bin)\n\n$(bin2fex /boot/script.bin 2>/dev/null)"
			;;
	esac
	echo -e "\n### Loaded modules:\n\n$(lsmod)"
	[[ -f /var/log/nand-sata-install.log ]] && echo -e "\n### nand-sata-install.log:\n\n$(cat /var/log/nand-sata-install.log)"
	echo -e "\n### Current system health:\n\n$("$0" -s | grep -E "^Time|^[0-9]")"
	stress -t 3 -c $(grep -c processor /proc/cpuinfo) --backoff 250 >/dev/null 2>&1 &
	"$0" -s | grep "^[0-9]"
	# Include name resolving information only if upload is not possible
	fping ix.io 2>/dev/null | grep -q alive || \
		[ -f /etc/resolv.conf ] && echo -e "\n### resolv.conf\n\n$(ls -la /etc/resolv.conf ; cat /etc/resolv.conf)" || \
		echo -e "\n### resolv.conf does not exist or readable"
	echo -e "\n### Current sysinfo:\n\n$(iostat -p ALL | grep -v "^loop")\n\n$(vmstat -w)\n\n$(free -h)\n\n$(zramctl 2>/dev/null)\n\n$(uptime)\n\n$(dmesg | tail -n 250)"
	echo -e "\n"
	[[ "$(id -u)" -eq "0" ]] && for sysfsnode in /proc/sys/vm/* ; do sysctl $(echo ${sysfsnode} | sed 's|/proc/sys/vm/|vm.|'); done
	echo -e "\n### interrupts:\n$(cat /proc/interrupts)"
	ls /tmp/armbianmonitor_checks_* >/dev/null 2>&1 || return
	for file in /tmp/armbianmonitor_checks_* ; do
		echo -e "\n### \c"
		ls "${file}" | cut -f1 -d.
		echo
		cat "${file}"
	done
} # CollectSupportInfo

CheckCard() {
	if [ "$(id -u)" = "0" ]; then
		echo "Checking disks is not permitted as root or through sudo. Exiting" >&2
		exit 1
	fi
	
	if [ ! -d "$1" ]; then
		echo "\"$1\" does not exist or is no directory. Exiting" >&2
		exit 1
	fi
	TargetDir="$1"

	# check requirements
	which f3write >/dev/null 2>&1 || MissingTools=" f3"
	which iozone >/dev/null 2>&1 || MissingTools="${MissingTools} iozone3"
	if [ "X${MissingTools}" != "X" ]; then
		echo "Some tools are missing, please do an \"sudo apt-get -f -y install${MissingTools}\" before and try again" >&2
		exit 1
	fi
	
	# check provided path
	Device="$(GetDevice "$1")"
	set ${Device}
	DeviceName=$1
	FileSystem=$2
	echo "${DeviceName}" | grep -q "mmcblk0" || echo -e "\n${BOLD}WARNING:${NC} It seems you're not testing the SD card but instead ${DeviceName} (${FileSystem})\n"
	
	TestDir="$(mktemp -d "${TargetDir}/cardtest.XXXXXX" || exit 1)"
	date "+%s" >"${TestDir}/.starttime" || exit 1
	trap "rm -rf \"${TestDir}\" ; exit 0" 0 1 2 3 15
	LogFile="$(mktemp /tmp/armbianmonitor_checks_${DeviceName##*/}_${FileSystem}.XXXXXX)"
	
	# start actual test, create a small file for some space reserve
	fallocate -l 32M "${TestDir}/empty.32m" 2>/dev/null || dd if=/dev/zero of="${TestDir}/empty.32m" bs=1M count=32 status=noxfer >/dev/null 2>&1
	ShowWarning=false
	# Start writing
	echo -e "Starting to fill ${DeviceName} with test patterns, please be patient this might take a very long time"
	f3write "${TestDir}" | tee "${LogFile}"
	touch "${TestDir}/.starttime" || ShowDeviceWarning
	rm "${TestDir}/empty.32m"
	# Start verify
	echo -e "\nNow verifying the written data:"
	echo "" >>"${LogFile}"
	f3read "${TestDir}" | tee -a "${LogFile}"
	touch "${TestDir}/.starttime" || ShowDeviceWarning
	rm "${TestDir}/"*.h2w
	echo -e "\nStarting iozone tests. Be patient, this can take a very long time to complete:"
	echo "" >>"${LogFile}"
	cd "${TestDir}"
	iozone -e -I -a -s 100M -r 4k -r 512k -r 16M -i 0 -i 1 -i 2 | tee -a "${LogFile}"
	touch "${TestDir}/.starttime" || ShowDeviceWarning
	echo -e "\n${BOLD}The results from testing ${DeviceName} (${FileSystem}):${NC}"
	grep -E "Average|Data" "${LogFile}" | sort -r
	echo "                                            random    random"
	echo -e "reclen    write  rewrite    read    reread    read     write\c"
	awk -F"102400  " '/102400/ {print $2}' <"${LogFile}"

	# check health
	echo -e "\n${BOLD}Health summary: \c"
	grep -Eq "Read-only|Input/output error" "${LogFile}" && (echo -e "${LRED}${BOLD}${DeviceName} failed${NC}" ; exit 0)
	grep -q "Data LOST: 0.00 Byte" "${LogFile}" && echo -e "${LGREEN}OK" || \
		(echo -e "${LRED}${BOLD}${DeviceName} failed. Replace it as soon as possible!" ; \
		grep -A3 "^Data LOST" "${LogFile}")

	# check performance
	RandomSpeed=$(awk -F" " '/102400       4/ {print $7"\t"$8}' <"${LogFile}")
	if [ "X${RandomSpeed}" != "X" ]; then
		# Only continue when we're able to read out iozone results
		set ${RandomSpeed}
		RandomReadSpead=$1
		RandomWriteSpead=$2
		ReadSpeed=$(awk -F" " '/Average reading speed/ {print $4"\t"$5}' <"${LogFile}")
		set ${ReadSpeed}
		if [ "X$2" = "XMB/s" ]; then
			RawReadSpead=$(echo "$1 * 1000" | bc -s | cut -f1 -d.)
		else
			RawReadSpead$(echo "$1" | cut -f1 -d.)
		fi
		echo -e "\n${NC}${BOLD}Performance summary:${NC}\nSequential reading speed:$(printf "%6s" $1) $2 \c"
		[ ${RawReadSpead} -le 2500 ] && Exclamation="${LRED}${BOLD}way " || Exclamation=""
		[ ${RawReadSpead} -le 5000 ] && Exclamation="${Exclamation}${BOLD}too "
		[ ${RawReadSpead} -le 7500 ] && echo -e "(${Exclamation}low${NC})\c"
		echo "${Exclamation}" | grep -q "too" && ShowWarning=true
		printf "\n 4K random reading speed: %6s KB/s " "$RandomReadSpead"
		[ ${RandomReadSpead} -le 700 ] && Exclamation="${LRED}${BOLD}way " || Exclamation=""
		[ ${RandomReadSpead} -le 1400 ] && Exclamation="${Exclamation}${BOLD}too "
		[ ${RandomReadSpead} -le 2500 ] && echo -e "(${Exclamation}low${NC})\c"
		echo "${Exclamation}" | grep -q "too" && ShowWarning=true
		WriteSpeed=$(awk -F" " '/Average writing speed/ {print $4"\t"$5}' <"${LogFile}")
		set ${WriteSpeed}
		if [ "X$2" = "XMB/s" ]; then
			RawWriteSpeed=$(echo "$1 * 1000" | bc -s | cut -f1 -d.)
		else
			RawWriteSpeed=$(echo "$1" | cut -f1 -d.)
		fi
		printf "\nSequential writing speed: %6s %s " "$1" "$2"
		[ ${RawWriteSpeed} -le 2500 ] && Exclamation="${LRED}${BOLD}way " || Exclamation=""
		[ ${RawWriteSpeed} -le 4000 ] && Exclamation="${Exclamation}${BOLD}too "
		[ ${RawWriteSpeed} -le 6000 ] && echo -e "(${Exclamation}low${NC})\c"
		echo "${Exclamation}" | grep -q "too" && ShowWarning=true
		printf "\n 4K random writing speed: %6s KB/s " "$RandomWriteSpead"
		[ ${RandomWriteSpead} -le 400 ] && Exclamation="${LRED}${BOLD}way " || Exclamation=""
		[ ${RandomWriteSpead} -le 750 ] && Exclamation="${Exclamation}${BOLD}too "
		[ ${RandomWriteSpead} -lt 1000 ] && echo -e "(${Exclamation}low${NC})\c"
		echo "${Exclamation}" | grep -q "too" && ShowWarning=true
		if [ "X${ShowWarning}" = "Xtrue" ]; then
			echo -e "\n\n${BOLD}The device you tested seems to perform too slow to be used with Armbian."
			echo -e "This applies especially to desktop images where slow storage is responsible"
			echo -e "for sluggish behaviour. If you want to have fun with your device do NOT use"
			echo -e "this media to put the OS image or the user homedirs on.${NC}\c"
		fi
		echo -e "\n\nTo interpret the results above correctly or search for better storage
alternatives please refer to http://oss.digirati.com.br/f3/ and also
http://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-microsd-card
and http://thewirecutter.com/reviews/best-microsd-card/"
	fi
} # CheckCard

ShowDeviceWarning() {
	echo -e "\n${LRED}${BOLD}Test stopped, read-only filesystem\n\n${NC}${LRED}$(dmesg | grep 'I/O error')"
	echo -e "\n${BOLD}Please be careful using this media since it seems it's already broken. Exiting test.\n${NC}"
	exit 0
} # ShowDeviceWarning

GetDevice() {
	if TestPath=$(findmnt --noheadings --output SOURCE,FSTYPE --target "$1" --uniq); then
		echo "${TestPath}"
	else
		echo "Bud Path: $1" >&2; exit 1
	fi
} # GetDevice

VerifyInstallation() {
	# Ensure that we're running as root since otherwise querying SATA/USB disks won't work
	if [ "$(id -u)" != "0" ]; then
		echo "This check must be run as root. Aborting." >&2
		exit 1
	fi
	
	echo -e "Starting package integrity check. This might take some time. Be patient please..."
	OUTPUT=$(dpkg --verify | grep -Evi "${VerifyRepairExcludes}" | awk -F" /" '{print "/"$2}')
	if [[ -z $OUTPUT ]]; then
		echo -e "\n${LGREEN}${BOLD}It appears you don't have any corrupt files or packages!${NC}"
	else
		echo -e "\n${LRED}${BOLD}It appears you may have corrupt packages.${NC}\n"
		echo -e "This is usually a symptom of filesystem corruption caused by SD cards or eMMC"
		echo -e "dying or burning the OS image to the installation media went wrong.\n"
		echo -e "The following changes from packaged state files were detected:\n"
		echo -e "${OUTPUT}\n"
	fi
} # VerifyInstallation

NetworkMonitorMode() {

	# Allow armbianmonitor to return back to armbian-config
	trap "echo ; exit 0" 0 1 2 3 15
	
	# Count interfaces - multiple routes causing interfaces to show up more than once, filtering...
	ifacecount=$(route -n | grep -E UG | grep -Eo '[^ ]*$' | sort | uniq)
	# If there are two ore more interfaces detected open a dynamic dialog box to select which to monitor
	if [ "$(echo -e $ifacecount | tr ' ' '\n' | wc -l)" -gt 1 ]; then
		ifacemenu=$(route -n | grep -E UG | grep -Eo '[^ ]*$' | sort | uniq | awk '{a[$1]=$1}END{for(i in a)printf i" "a[i]" "}')
		ifacefunc() {
			dialog --backtitle "Interface selector" \
			--title "Multiple network interfaces detected" \
			--menu "Choose which interface to monitor:" \
			15 50 $(route -n | grep -E UG | grep -Eo '[^ ]*$' | sort | uniq | wc -l) \
			$(echo $ifacemenu) 2>&1 >$(tty)
		}
		iface=$(ifacefunc)
	else
	# Use default behavior if one interface is found only
		iface=$(route -n | grep -E UG | grep -Eo '[^ ]*$')
	fi
	timerStart
	kickAllStatsDown
	
	printf "\nruntime network statistics: %s\m" "$(uname -n)"
	printf "network interface: %s\n" "$iface"
	printf "[tap 'd' to display column headings]\n"
	printf "[tap 'z' to reset counters]\n"
	printf "[use <ctrl-c> to exit]\n"
	printf "[bps: bits/s, Mbps: megabits/s, pps: packets/s, MB: megabytes]\n\n"
	printf "%-11s %-66s          %-66s\n" "$iface" "rx.stats____________________________________________________________" "tx.stats____________________________________________________________"
	printf "%-11s %-11s %-11s \u01B0.%-11s %-11s \u01B0.%-11s \u01A9.%-11s %-11s %-11s \u01B0.%-11s %-11s \u01B0.%-11s \u01A9.%-11s\n\n" "count" "bps" "Mbps" "Mbps" "pps" "pps" "MB" "bps" "Mbps" "Mbps" "pps" "pps" "MB"
	
	while true; do
		nss=(`sed -n 's/'$iface':\s//p' /proc/net/dev`)
		rxB=${nss[0]}
		rxP=${nss[1]}
		txB=${nss[8]}
		txP=${nss[9]}
		drxB=$(( rxB - prxB ))
		drxb=$(( drxB* 8 ))
		drxmb=$(echo "scale=2;$drxb/1000000"|bc)
		drxP=$(( rxP - prxP  ))
		dtxB=$(( txB - ptxB ))
		dtxb=$(( dtxB * 8 ))
		dtxmb=$(echo "scale=2;$dtxb/1000000"|bc)
		dtxP=$(( txP - ptxP ))
		if [ "$cnt" != "0" ]; then
			if [ "$c" == "N" ]; then
				printf "\x1b[1A"
			fi
			srxb=$(( srxb + drxb ))
			stxb=$(( stxb + dtxb ))
			srxB=$(( srxB + drxB ))
			stxB=$(( stxB + dtxB ))
			srxP=$(( srxP + drxP ))
			stxP=$(( stxP + dtxP ))
			srxMB=$(echo "scale=2;$srxB/1024^2"|bc)
			stxMB=$(echo "scale=2;$stxB/1024^2"|bc)
			arxb=$(echo "scale=2;$srxb/$cnt"|bc)
			atxb=$(echo "scale=2;$stxb/$cnt"|bc)
			arxmb=$(echo "scale=2;$arxb/1000000"|bc)
			atxmb=$(echo "scale=2;$atxb/1000000"|bc)
			arxP=$(echo "scale=0;$srxP/$cnt"|bc)
			atxP=$(echo "scale=0;$stxP/$cnt"|bc)
			printf "%-11s %-11s %-11s   %-11s %-11s   %-11s   %-11s %-11s %-11s   %-11s %-11s   %-11s   %-11s\n" "$cnt" "$drxb" "$drxmb" "$arxmb" "$drxP" "$arxP" "$srxMB" "$dtxb" "$dtxmb" "$atxmb" "$dtxP" "$atxP" "$stxMB"
		fi
		prxB="$rxB"
		prxP="$rxP"
		ptxB="$txB"
		ptxP="$txP"
		let cnt++
		timerShut
		read -r -n1 -s -t$procSecs zeroAll
		timerStart
		if [ "$zeroAll" == 'z' ]; then
			kickAllStatsDown
		fi
		if [ "$zeroAll" == 'd' ]; then
			scrollingHeader
		fi
	done
}

scrollingHeader() {
	printf "%-11s %-66s          %-66s\n" "$iface" "rx.stats____________________________________________________________" "tx.stats____________________________________________________________"
	printf "%-11s %-11s %-11s \u01B0.%-11s %-11s \u01B0.%-11s \u01A9.%-11s %-11s %-11s \u01B0.%-11s %-11s \u01B0.%-11s \u01A9.%-11s\n\n" "count" "bps" "Mbps" "Mbps" "pps" "pps" "MB" "bps" "Mbps" "Mbps" "pps" "pps" "MB"
}

timerStart() {
	read -r st0 st1 < <(date +'%s %N')
}
timerShut() {
	read -r sh0 sh1 < <(date +'%s %N')
	jusquaQuand=$(echo "scale=2;($sh0-$st0)*1000000000+($sh1-$st1)"|bc)
	procSecs=$(echo "scale=2;(1000000000-$jusquaQuand)/1000000000"|bc)
	if [ "$rf1" == "debug" ]; then
		printf "time controller adjustment: %d\n" "$procSecs"
		if [ "$c" == "N" ]; then
			printf "\x1b[1A"
		fi
	fi
}
kickAllStatsDown() {
	prxB=0
	prxP=0
	ptxB=0
	ptxP=0
	srxb=0
	stxb=0
	srxB=0
	stxB=0
	srxMB=0
	stxMB=0
	srxP=0
	stxP=0
	cnt=0
}

Run7ZipBenchmark() {
	echo -e "Preparing benchmark. Be patient please..."
	# Do a quick 7-zip benchmark, check whether binary is there. If not install it
	MyTool=$(which 7za || which 7zr)
	[ -z "${MyTool}" ] && apt-get -f -qq -y install p7zip && MyTool=/usr/bin/7zr
	[ -z "${MyTool}" ] && (echo "No 7-zip binary found and could not be installed. Aborting" >&2 ; exit 1)
	# Send CLI monitoring to the background to be able to spot throttling and other problems
	MonitoringOutput="$(mktemp /tmp/${0##*/}.XXXXXX)"
	trap "rm \"${MonitoringOutput}\" ; exit 0" 0 1 2 3 15
	armbianmonitor -m >${MonitoringOutput} &
	MonitoringPID=$!
	# run 7-zip benchmarks after waiting 10 seconds to spot whether the system was idle before.
	# We run the benchmark a single time by default unless otherwise specified on the command line
	RunHowManyTimes=${runs:-1}
	sleep 10
	for ((i=1;i<=RunHowManyTimes;i++)); do
		"${MyTool}" b
	done
	# report CLI monitoring results as well
	kill ${MonitoringPID}
	echo -e "\nMonitoring output recorded while running the benchmark:\n"
	sed -e '/^\s*$/d' -e '/^Stop/d' <${MonitoringOutput}
	echo -e "\n"
} # Run7ZipBenchmark

Main "$@"