UPS readout Shellscript for Freenas

#!/bin/sh

### Parameters ###
logfile="/tmp/ups_report.tmp"
email="your_mail@gmail.com"
subject="UPS Status Report for FreeNAS"
ups="ups@localhost"

### Set email headers ###
(
    echo "To: ${email}"
    echo "Subject: ${subject}"
    echo "Content-Type: text/html"
    echo "MIME-Version: 1.0"
    echo -e "\r\n"
) > ${logfile}

### Set email body ###
(
    echo "<pre style=\"font-size:14px\">"
    echo "UPS report generated:"
    date "+Time: %Y-%m-%d %H:%M:%S"
    echo ""
    echo "Ups Info:"
    echo "    UPS Status: `upsc ${ups} ups.status`"
    echo "    UPS Temp: `upsc ${ups} ups.temperature` C"
    echo ""
    echo "Input Output:"
    echo "    Input Frequency: `upsc ${ups} input.frequency` Hz"
    echo "    Input Voltage: `upsc ${ups} input.voltage` V"
    echo "    Output Voltage: `upsc ${ups} output.voltage` V"
    echo "    Output Load: `upsc ${ups} ups.load` %"
    echo ""
    echo "Battery Status:"
    echo "    Battery Runtime: `upsc ${ups} battery.runtime` s"
    echo "    Battery Voltage: `upsc ${ups} battery.voltage` V"
    echo "    Battery Charge: `upsc ${ups} battery.charge` %"
    echo ""
    echo "</pre>"
) >> ${logfile}

### Send report ###
sendmail -t < ${logfile}
rm ${logfile}