Add key backlight

.i3/config

@@ -67,8 +67,11 @@ bindsym $mod+XF86AudioMute exec --no-startup-id pactl set-sink-mute 1 toggle # m
 
 
 ## requires xbacklight
-bindsym XF86MonBrightnessUp exec light -A 5 # increase screen brightness
-bindsym XF86MonBrightnessDown exec light -U 5 # decrease screen brightness
+#bindsym XF86MonBrightnessUp exec light -A 5 # increase screen brightness
+#bindsym XF86MonBrightnessDown exec light -U 5 # decrease screen brightness
+# increase/decrease keyboard brightness
+bindsym XF86KbdBrightnessUp exec keybrightness up
+bindsym XF86KbdBrightnessDown exec keybrightness down 
 
 ## Keyboard Backlighting
 #/sys/devices/platform/asus-nb-wmi/leds/asus\:\:kbd_backlight/brightness

install.sh

@@ -33,7 +33,8 @@ ln -sfv ~/.vim/bundle/vimspectr/shell ~/.vimspectr-shell
 ln -sfv "$DOTFILES_DIR/run/.profile" ~
 ln -sfv "$DOTFILES_DIR/run/.xprofile" ~
 ln -sfv "$DOTFILES_DIR/run/.bashrc" ~
-ln -sfv "$DOTFILES_DIR/system/.bruise" ~/apps/bruise
+ln -sfv "$DOTFILES_DIR/system/.bruise" ~/bin/bruise
+ln -sfv "$DOTFILE_DIR/system/.keybrightness" ~/bin/keybrightness
 ln -sfv "$DOTFILES_DIR/git/.gitconfig" ~
 ln -sfv "$DOTFILES_DIR/system/.vimrc" ~
 ln -sfv "$DOTFILES_DIR/system/.dir_colors" ~

system/.keybrightness

@@ -0,0 +1,107 @@
+#!/bin/sh
+# By Giorgos Keramidas
+# From: https://unix.stackexchange.com/questions/260409/set-bindings-in-i3-to-control-keyboard-backlight
+
+# backlight_get
+#       Print current keyboard brightness from UPower to stdout.
+backlight_get()
+{
+    dbus-send --type=method_call --print-reply=literal --system         \
+        --dest='org.freedesktop.UPower'                                 \
+        '/org/freedesktop/UPower/KbdBacklight'                          \
+        'org.freedesktop.UPower.KbdBacklight.GetBrightness'             \
+        | awk '{print $2}'
+}
+
+# backlight_get_max
+#       Print the maximum keyboard brightness from UPower to stdout.
+backlight_get_max()
+{
+    dbus-send --type=method_call --print-reply=literal --system       \
+        --dest='org.freedesktop.UPower'                               \
+        '/org/freedesktop/UPower/KbdBacklight'                        \
+        'org.freedesktop.UPower.KbdBacklight.GetMaxBrightness'        \
+        | awk '{print $2}'
+}
+
+# backlight_set NUMBER
+#       Set the current backlight brighness to NUMBER, through UPower
+backlight_set()
+{
+    value="$1"
+    if test -z "${value}" ; then
+        echo "Invalid backlight value ${value}"
+    fi
+
+    dbus-send --type=method_call --print-reply=literal --system       \
+        --dest='org.freedesktop.UPower'                               \
+        '/org/freedesktop/UPower/KbdBacklight'                        \
+        'org.freedesktop.UPower.KbdBacklight.SetBrightness'           \
+        "int32:${value}}"
+}
+
+# backlight_change [ UP | DOWN | NUMBER ]
+#       Change the current backlight value upwards or downwards, or
+#       set it to a specific numeric value.
+backlight_change()
+{
+    change="$1"
+    if test -z "${change}" ; then
+        echo "Invalid backlight change ${change}."                    \
+            "Should be 'up' or 'down'." >&2
+        return 1
+    fi
+
+    case ${change} in
+    [1234567890]|[[1234567890][[1234567890])
+        current=$( backlight_get )
+        max=$( backlight_get_max )
+        value=$( expr ${change} + 0 )
+        if test ${value} -lt 0 || test ${value} -gt ${max} ; then
+            echo "Invalid backlight value ${value}."                  \
+                "Should be a number between 0 .. ${max}" >&2
+            return 1
+        else
+            backlight_set "${value}"
+            notify-send -t 800 "Keyboard brightness set to ${value}"
+        fi
+        ;;
+
+    [uU][pP])
+        current=$( backlight_get )
+        max=$( backlight_get_max )
+        if test "${current}" -lt "${max}" ; then
+            value=$(( ${current} + 1 ))
+            backlight_set "${value}"
+            notify-send -t 800 "Keyboard brightness set to ${value}"
+        fi
+        ;;
+
+    [dD][oO][wW][nN])
+        current=$( backlight_get )
+        if test "${current}" -gt 0 ; then
+            value=$(( ${current}  - 1 ))
+            backlight_set "${value}"
+            notify-send -t 800 "Keyboard brightness set to ${value}"
+        fi
+        ;;
+
+    *)
+        echo "Invalid backlight change ${change}." >&2
+        echo "Should be 'up' or 'down' or a number between"           \
+            "1 .. $( backlight_get_max )" >&2
+        return 1
+        ;;
+    esac
+}
+
+if test $# -eq 0 ; then
+    current_brightness=$( backlight_get )
+    notify-send -t 800 "Keyboard brightness is ${current_brightness}"
+else
+    # Handle multiple backlight changes, e.g.:
+    #   backlight.sh up up down down up
+    for change in "$@" ; do
+        backlight_change "${change}"
+    done
+fi