#!/usr/bin/env bash
#
# Scans NAS for viruses and alerts users
# Uses avira and clamav ATM
USERS="foo@example.org"
SCANDIR="/mnt/nas_movies /mnt/nas_music /mnt/nas_p2p /mnt/nas_software /mnt/nas_upload"
LOGFILE="/root/virus_scan_$(date +%d_%m_%Y).log"
SCANNER=(	"avscan -s --batch --log-file=$LOGFILE $SCANDIR"
		"clamscan -r -i -l $LOGFILE $SCANDIR"
	)
LOGGER=$(which logger)


for i in $(seq 1 $(echo  ${#SCANNER[*]})); do
	LOG_NAME="$(basename $0)_$i_$(date +%d_%m_%Y)_XXXXXX"
	mktemp -t $LOG_NAME
done

# Logging
function logit() {
	case $2 in
		error)
			$LOGGER -si $(basename $0): $1
			;;
		*)
			$LOGGER -i $(basename $0): $1
			;;
	esac
}

# Mount all noauto things from /etc/fstab
for i in $(grep 'nfs.*noauto' /etc/fstab | awk '{print $2}'); do
        if ! mount $i 2>/dev/null; then logit "Failed mounting $i" "error"; fi
done

# Run all scanners

COUNTER=0
for foo in "${SCANNER[@]}"; do
	TEMPFILE=$(find /tmp -type f -name $LOG_NAME)

	echo "**********************" > $TEMPFILE
	echo "* $COUNTER. scanner running with: $foo" >> $TEMPFILE
	echo "**********************" >> $TEMPFILE
	$foo
	sleep 2
done

# Merge all temporary logfiles
cat /root/avscan.log /root/clamscan.log > $LOGFILE

# Send e-mail
mail -s "NAS antivirus check" $USERS < $LOGFILE

# Unmount all noauto things from /etc/fstab
sleep 3
for i in $(grep 'nfs.*noauto' /etc/fstab | awk '{print $2}'); do
        if ! umount $i 2>/dev/null; then logit "Failed unmounting $i" "error"; fi
done