#!/usr/bin/env bash
[ ! -z "$DEBUG" ] && set -x
#set -eu
function write_html {
status=$1
STATUS_HTML=/srv/www/spacestatus.html
TEMPLATE_HTML='Status /usr/space: %s%s
'
CLOSED_HTML='Closed darkred Closed'
OPEN_HTML='Open brightgreen Open'
if [ "$status" -gt 0 ]
then
printf "$TEMPLATE_HTML" $OPEN_HTML > $STATUS_HTML
else
printf "$TEMPLATE_HTML" $CLOSED_HTML > $STATUS_HTML
fi
}
function write_json {
status=$1
STATUS_JSON=/srv/www/spacestatus.json
TEMPLATE_JSON=$( cat /usr/local/etc/spacestatus.json )
CLOSED_JSON='false'
OPEN_JSON='true'
# Previous status Open & Open now -> skip
grep -q '"open":true' $STATUS_JSON
if [[ $? -eq 0 && "$status" -gt 0 ]]
then
return
fi
# Previous status Closed & Closed now -> skip
grep -q '"open":false' $STATUS_JSON
if [[ $? -eq 0 && "$status" -eq 0 ]]
then
return
fi
if [ "$status" -eq 0 ]
then
printf "$TEMPLATE_JSON" $OPEN_JSON $( date +%s ) > $STATUS_JSON
else
printf "$TEMPLATE_JSON" $CLOSED_JSON $( date +%s ) > $STATUS_JSON
fi
}
tmpcount=$(mktemp)
exec 3>$tmpcount
/usr/sbin/dhcp-lease-list --parsable | awk '{print $4}' | while read ip
do
/usr/bin/arping -w 1 -f -q $ip
[ $? -eq 0 ] && echo 1 >&3
done
exec 3>&-
leases=$( cat $tmpcount | wc -l )
write_html $leases
write_json $leases
rm $tmpcount