power menu, redshift, polybar

.config/polybar/scripts/info-usbtoserial/95-usbtoserial.rules

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+ACTION=="add", SUBSYSTEM=="tty"
+    RUN+="/home/user/.config/polybar/info-usbtoserial.sh --update"
+ACTION=="remove", SUBSYSTEM=="tty"
+    RUN+="/home/user/.config/polybar/info-usbtoserial.sh --update"

.config/polybar/scripts/info-usbtoserial/README.md

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+# Script: info-usbtoserial
+
+A small script which shows the USB-to-Serial converters that are connected.
+
+This script is able to display device changes in real time. For this udev is being used.
+
+
+## Configuration
+
+Copy `95-usbtoserial.rules` to `/etc/udev/rules.d/95-usbtoserial.rules`. Make sure that the paths in the file have been modified properly.
+
+
+## Module
+
+```ini
+[module/info-usbtoserial]
+type = custom/script
+exec = ~/polybar-scripts/info-usbtoserial.sh
+tail = true
+```

.config/polybar/scripts/info-usbtoserial/info-usbtoserial.sh

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+#!/bin/sh
+usbtoserial_print() {
+    devices=$(find /dev/ -name "ttyUSB*")
+
+    counter=0
+    for device in $devices; do
+        device_name=$(udevadm info --query=property --export --name "$device" | grep ID_MODEL_FROM_DATABASE | cut -d "'" -f 2 | cut -d ' ' -f 1)
+
+        if [ $counter -gt 0 ]; then
+            printf ", %s" "$device_name"
+        else
+            printf "#1 %s" "$device_name"
+        fi
+
+        counter=$((counter + 1))
+    done
+
+    printf '\n'
+}
+
+path_pid="/tmp/polybar-usbtoserial.pid"
+
+case "$1" in
+    --update)
+        pid=$(cat $path_pid)
+
+        if [ "$pid" != "" ]; then
+            kill -10 "$pid"
+        fi
+        ;;
+    *)
+        echo $$ > $path_pid
+
+        trap exit INT
+        trap "echo" USR1
+
+        while true; do
+            usbtoserial_print
+
+            sleep 30 &
+            wait
+        done
+        ;;
+esac