ASUS AC86U NUT Startup Script

#!/bin/sh
# Modified 2022-06-15

readonly KERN=$(uname -r)
readonly LOGFILE="/opt/var/log/ups-notifications.txt"
readonly UPSCONF="/opt/etc/nut/ups.conf"
readonly UPSUSERS="/opt/etc/nut/upsd.users"
readonly UPSMONCONF="/opt/etc/nut/upsmon.conf"
UPS=""
USER=""
PASS=""
PDFLAG=""
SYSUSER=""

UPS=$(grep "\[" $UPSCONF | sed 's/\[//g' | sed 's/\]//g')
USER=$(grep "\[" $UPSUSERS | sed 's/\[//g' | sed 's/\]//g')
PASS=$(grep "password" $UPSUSERS | cut -f2 -d"=")
PDFLAG=$(grep "POWERDOWNFLAG" $UPSMONCONF | cut -f2 -d" ")
SYSUSER=$(nvram get http_username)

{
    echo "----------------------------------------------------------------------------"
    echo "$(date):  Starting NUT Services (system startup Script)"

    if [ -f "$PDFLAG" ]; then
        echo "     - Power down flag file detected, deleting"
        rm "$PDFLAG"
    fi

    lsmod | grep '^input_core' > /dev/null 2>&1
    if [ "$?" = "1" ]; then
        echo "Loading kernel module INPUT_CORE"
        insmod /lib/modules/${KERN}/kernel/drivers/input/input-core.ko
    else
        echo "Kernel module INPUT_CORE is already loaded"
    fi

    lsmod | grep '^hid' > /dev/null 2>&1
    if [ "$?" = "1" ]; then
        echo "Loading kernel module HID"
        insmod /lib/modules/${KERN}/kernel/drivers/hid/hid.ko
    else
        echo "Kernel module HID is already loaded"
    fi

    lsmod | grep '^usbhid' > /dev/null 2>&1
    if [ "$?" = "1" ]; then
        echo "Loading kernel module USBHID"
        insmod /lib/modules/${KERN}/kernel/drivers/hid/usbhid/usbhid.ko
    else
        echo "Kernel module USBHID is already loaded"
    fi

    sleep 2
    echo
    echo "Executing upsdrvctl command with SYSUSER as ${SYSUSER}"
    upsdrvctl -u ${SYSUSER} start
    sleep 10

    echo
    echo "Executing upsd command with SYSUSER as ${SYSUSER}"
    upsd -u ${SYSUSER}
    sleep 2
    echo
    echo "Executing upsmon command"
    upsmon -p
    sleep 5

    echo
    BATTLOW=$(upsc ${UPS}@localhost battery.charge.low)
    if ! [ "$BATTLOW" = "25" ]; then
        echo "     - Setting UPS Battery Low level to 25%"
        upsrw -s battery.charge.low=25 -u ${USER} -p ${PASS} ${UPS}@localhost
    fi

    RUNTIMELOW=$(upsc ${UPS}@localhost battery.runtime.low)
    if ! [ "$RUNTIMELOW" = "600" ]; then
        echo "     - Setting UPS Low Batt Run Time to 600 seconds"
        upsrw -s battery.runtime.low=600 -u ${USER} -p ${PASS} ${UPS}@localhost
    fi

    echo "$(date):  End of NUT Startup Script"
    echo "-------------------------------------------"
} >> $LOGFILE 2>&1