SAMBA auto power for ATX NAS

ATXoff.sh

#!/bin/bash
p=`cat /sys/class/gpio/gpio4/value`
if [[ $p  -eq 1 ]]; then
        sudo systemctl stop smbd
				# Change to your mdadm mount point (May be /dev/md127 or somthing due to a bug)
        sudo umount /dev/md127
        # sudo umount /dev/md/main
        # Will return $? != 0 if bussy

        while true; do
								# Change to your mdadm mount point
                sudo mdadm --stop /dev/md/main
                if [[ $? ]]; then
                        sudo echo "0" > /sys/class/gpio/gpio4/value
                        sudo systemctl start smbd
                        break
                fi
        done
fi

ATXon.sh

#!/bin/bash
# Set pin 4 to high to enable PSU
p=`cat /sys/class/gpio/gpio4/value`
if [[ $p -eq 0 ]]; then
        sudo echo "1" > /sys/class/gpio/gpio4/value
        sleep 20
        echo assemble
        sudo mdadm --assemble --scan
        echo mount
				# Replace the UUID with the your UUID
        sudo mount --uuid ca87639e-7acd-4287-848a-d2a0b78667a5 /mnt &
        echo restart smbd
        sudo systemctl restart smbd
fi

core.sh

#!/bin/bash
# # Samba config 
# sudo nano /etc/samba/smb.conf
# testparm
# sudo systemctl restart smbd

# NAS set up folowing https://www.ricmedia.com/build-raspberry-pi3-raid-nas-server/
# DO NOT INCLUDE THE MOUNT IN fstab, this will prevent the system to boot without the drive

# This script uses pin 4 so change gpio4 to your pin and the export

# set pin 4 to output
cat /sys/class/gpio/gpio4/direction
if [[ $? ]]; then
        sudo echo "4" > /sys/class/gpio/export
        sudo echo "out" > /sys/class/gpio/gpio4/direction
fi

sudo systemctl start smbd

while [[ true ]]; do
        echo loop
        if [[ `sudo /samba/inuse.sh` -eq 0 ]]; then
                echo off
                sudo /samba/ATXoff.sh
                sleep 1
        else
                echo on
                sudo /samba/ATXon.sh
                sleep 1m
        fi
done

inuse.sh

#!/bin/bash
if [[ `sudo smbstatus -b | wc -l` -le 4 ]]; then
        echo 0
else
        echo 1
fi