Add touchscreen toggle script, change scripts to be POSIX compliant

.config/i3/config

@@ -202,6 +202,8 @@ bindsym $mod+F2 exec xbacklight -dec 10 && pkill -RTMIN+2 i3blocks
 bindsym --release Print exec scrot -e "mv \$f $HOME/Pictures/screen_captures/"		# Fullscreen
 bindsym --release Shift+Print exec scrot -s -e "mv \$f $HOME/Pictures/screen_captures/"	# Selection
 bindsym --release $mod+Print exec scrot -u -e "mv \$f $HOME/Pictures/screen_captures/"	# Focused window
+# Touchscreen toggle
+bindsym $mod+F7 exec $HOME/.scripts/wm/touchscreen.sh
 
 # Window appearance
 smart_gaps on

.scripts/wm/brightness.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 case $BLOCK_BUTTON in
 	3) xbacklight -set 30 ;; # right click
@@ -8,9 +8,9 @@ esac
 
 PERCENTAGE=$(printf  "%.0f" "$(xbacklight)")
 
-if (( $PERCENTAGE >= 75 )); then
+if $(( $PERCENTAGE >= 75 )); then
 	ICON=""
-elif (( $PERCENTAGE >= 25 )); then
+elif $(( $PERCENTAGE >= 25 )); then
 	ICON=""
 else 
 	ICON=""

.scripts/wm/lock.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 ICON="$HOME/Pictures/lock.png"
 TMPBG='/tmp/screen.png'

.scripts/wm/touchscreen.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+device="04F3200A:00 04F3:2373"
+state=$(xinput --list-props "$device" | grep "Device Enabled" | sed -nr 's/.*:\t([0-9])/\1/p')
+
+if [ "$state" = "0" ]; then
+	xinput set-prop "$device" 140 1
+else
+	xinput set-prop "$device" 140 0
+fi
+

.scripts/wm/volume.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # default (ALSA), pulse, jack
 MIXER="pulse"

README.md

@@ -85,6 +85,7 @@ All packages that are manually installed via pacman -S, dependencies not include
     python2-click-5.1 (AUR)
     platformio (AUR)
     vim
+    checkbashisms (AUR)
 
 ### Configuration: