ArchLinux Service for auto mounting USB drive for SMILEplug

devmon@.service

[Unit]
Description=devmon Service

[Service]
Type=simple
User=www-data
# Set DISPLAY for popup dialogs
Environment=DISPLAY=:0
EnvironmentFile=/etc/conf.d/devmon
ExecStart=/usr/bin/devmon --exec-on-device /dev/sdb1 "/etc/nginx/usb_sharing mount 1 %d" --exec-on-remove "/etc/nginx/usb_sharing unmount 1 %d" --exec-on-device /dev/sdc1 "/etc/nginx/usb_sharing mount 2 %d" --exec-on-remove "/etc/nginx/usb_sharing unmount 2 %d"

[Install]
WantedBy=multi-user.target

usb_sharing

#!/bin/bash

#####
# This should live in /etc/nginx/
# It symlinks the mount point for USB drives to a web-accessible directory in the ngnix htmldoc root
# edited on 11/22/16 by RMT for use in the SMLEpi device
#####

readonly storage1_share="/usr/share/nginx/html/storage1"
readonly storage2_share="/usr/share/nginx/html/storage2"

function exec_at_mount()
{
	case ${1} in
		"1")
			#Remove existing symlink
			rm ${storage1_share}
			# Create symlink
			ln -s "${2}" ${storage1_share}
		;;
		"2")
			#Remove existing symlink
			rm ${storage2_share}
			# Create symlink
			ln -s "${2}" ${storage2_share}
		;;
	esac	
	exit 0;
}

function exec_at_unmount()
{
	case ${1} in
		"1")
			# Remove Link
			rm ${storage1_share}
		;;
		"2")
			# Remove Link
			rm ${storage2_share}
		;;
	esac	
	exit 0;
}

# M A I N

# The incoming parameters are
# {1} mount/unmont
# {2} device number
# {3} mount point of the device

mount_point=${3}
device_num=${2}

if [[ ${1} == "mount" ]]; then
	exec_at_mount ${device_num} "$mount_point"
fi

if [[ ${1} == "unmount" ]]; then
	exec_at_unmount ${device_num} "$mount_point"
fi