Add check-lan.sh

check-lan.sh

@@ -0,0 +1,50 @@
+#! /bin/bash
+#
+# Script for displaying local network address in polybar, tint2, conky etc.
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# @linux-aarhus - root.nix.dk
+#
+# for icons install the package ttf-font-icons from the Manjaro Linux repo
+#
+
+ttf_icons(){
+    # set icons if font is available
+    if [ -f '/usr/share/fonts/TTF/icons.ttf' ]; then
+      wlan=''
+      lan=''
+      offline=''
+    fi
+}
+
+lanip() {
+    # parse output from ip a show $nic
+    echo $(ip a show $1 | grep 'inet ' | head -n 4 | awk '{print $2}' | cut -d'/' -f1)
+}
+
+ttf_icons
+# find active interface
+nic=$(ip a | grep ' state UP' | cut -d' ' -f2 | cut -d':' -f1)
+if [[ ${nic} != "" ]]; then
+    # print IP address
+    if [[ ${nic} == e* ]]; then
+        echo ${lan} $(lanip ${nic})
+    else
+        echo ${wlan} $(lanip ${nic})
+    fi
+else
+    # print offline
+    echo ${offline} n/a
+fi