Wii Classic Controller with ZSNES on Linux

#!/bin/bash
# AUTHOR: Frash Pikass
# DESCRIPTION:
#   This script does the following
#   0. Writes the correct script to use the Classic Controller in /tmp/gamepad
#   1. Starts the kernel module 'uinput' in order to accept joysticks
#   2. Starts wminput Wiimote driver to use classic controller as a driver
#   3. Check if wiimotes are connected
#   4.1 If a wiimote is connected start zsnes
#   4.2 If a wiimote is not connected tell the user
#   5. Make sure wiimote processes are killed after zsnes stopped running
#
# DEPENDENCIES:
#   wminput
#   zsnes
#   bluez
#

# 0. Creates the gamepad script
cat <<EOF > /tmp/gamepad
# gameport
Classic.Dpad.X = ABS_HAT0X
Classic.Dpad.Y = ABS_HAT0Y
Classic.LStick.X = ABS_X
Classic.LStick.Y = ABS_Y
Classic.RStick.X = ABS_RX
Classic.RStick.Y = ABS_RY
Classic.A = BTN_A
Classic.B = BTN_B
Classic.X = BTN_X
Classic.Y = BTN_Y
Classic.Minus = BTN_SELECT
Classic.Plus  = BTN_START
Classic.Home  = BTN_MODE
Classic.L  = BTN_TL
Classic.R  = BTN_TR
Classic.ZL = BTN_TL2
Classic.ZR = BTN_TR2
EOF

# 1. Starts uinput
sudo modprobe uinput
echo "This script\'s PID is $$"
echo Push 1 and 2 on the Wiimote
sleep 1

# 2. Waits for wiimote connection and starts wminput
sudo wminput -c /tmp/gamepad > /dev/null 2>&1 &

# Saves the PID of sudo
PIDsudo=$!
# Saves the PID of wminput
# (which is the only PID shown by ps with parent PID==$PIDsudo)
sleep 1
PIDwminput=$(ps --ppid $PIDsudo -o pid=)
echo "PID numbers: sudo=$PIDsudo; wminput=$PIDwminput"

# Waits for connection
sleep 8

# 3. Tests wminput to see if it's alive (which means a wiimote is connected)
sudo kill -0 $PIDwminput

if [ $? -eq 0 ]
    then
        # 4.1 If wminput is alive start zsnes
        echo wminput process $PIDwminput is alive and running ':)'
        sudo zsnes -ad sdl -r 5

        # Kill wiimote processes for memory/battery saving
        sleep 1
        $(sudo kill -9 $PIDsudo $PIDwminput) > /dev/null 2>&1
        exit 0
    else
        # 4.2 If wminput is dead, exit with status 1
        echo wminput process $PIDwminput could not be run ':('
        exit 1
fi