From dfb3fa5a8829dba7e33fc5ca048680b6cfb057e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20Schl=C3=BCter?= <bschlueter@posteo.de>
Date: Wed, 24 Jan 2018 14:27:16 +0100
Subject: itzks-installscrit: Add check to see if a WiFi-Interface is available
 before asking for SSID and PW.

---
 install-itzks-workstation | 39 ++++++++++++++++++++++++++++-----------
 1 file changed, 28 insertions(+), 11 deletions(-)

diff --git a/install-itzks-workstation b/install-itzks-workstation
index 8f0dfd2..d8f1e53 100644
--- a/install-itzks-workstation
+++ b/install-itzks-workstation
@@ -31,19 +31,19 @@ invoke-rc.d fetch-ldap-cert start
 # Alternate add itzks-package repo only if not already there
 if [ -e /etc/apt/sources.list.d/itzks.list ]
     then
-    :
+	:    
     else
-    touch /etc/apt/sources.list.d/itzks.list
+	touch /etc/apt/sources.list.d/itzks.list
 fi
 
 # Add repos to itzks.list if empty
 if [ -s /etc/apt/sources.list.d/itzks.list ]
     then
-    :
+	:
     else
-    echo "deb http://packages.it-zukunt-schule.de/debian stretch main contrib non-free" >> /etc/apt/sources.list.d/itzks.list
-    echo "deb http://packages.it-zukunft-schule.de/debian stretch-backports main contrib non-free" >> /etc/apt/sources.list.d/itzks.list
-    echo "deb http://packages.it-zukunft-schuke.de/debian sid main contrib non-free" >> /etc/apt/sources.list.d/itzks.list
+	echo "deb http://packages.it-zukunt-schule.de/debian stretch main contrib non-free" >> /etc/apt/sources.list.d/itzks.list
+        echo "deb http://packages.it-zukunft-schule.de/debian stretch-backports main contrib non-free" >> /etc/apt/sources.list.d/itzks.list
+        echo "deb http://packages.it-zukunft-schuke.de/debian sid main contrib non-free" >> /etc/apt/sources.list.d/itzks.list
 fi
 
 # Add itzks-package repo
@@ -123,11 +123,28 @@ apt-get autoremove --purge gnome-packagekit
 ####################
 
 # Add system-wide WiFi-config
-echo '!   WIFI-Netzwerk hinzufügen'
-read -p 'Wie lautet die SSID? ' ssid
-read -p 'Wie lautet das zugehörige Passwort? ' passw
-export WIFIDEV=wlan0
-wpa_passphrase $ssid $passw >> /etc/wpa_supplicant/wpa_supplicant-$WIFIDEV.conf
+# echo '!   WIFI-Netzwerk hinzufügen'
+# read -p 'Wie lautet die SSID? ' ssid
+# read -p 'Wie lautet das zugehörige Passwort? ' passw
+# export WIFIDEV=wlan0
+# wpa_passphrase $ssid $passw >> /etc/wpa_supplicant/wpa_supplicant-$WIFIDEV.conf
+
+# Alternate: Check for WiFi-Interface before asking for SSID and PW
+
+FOUND=`grep "wlan0" /proc/net/dev`
+
+if  [ -n "$FOUND" ]
+    then
+    # Add system-wide WiFi-config
+    echo '!   WIFI-Netzwerk hinzufügen'
+    read -p 'Wie lautet die SSID? ' ssid
+    read -p 'Wie lautet das zugehörige Passwort? ' passw
+    export WIFIDEV=wlan0
+    wpa_passphrase $ssid $passw >> /etc/wpa_supplicant/wpa_supplicant-$WIFIDEV.conf
+    else
+    :
+fi
+
 
 ####################
 
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