fixing renderText script

scan.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+# Scan APs with 'iw' and output to single-line. 
+# CSV is in the format:
+#   BSSID, freq (MHz), RSSI (dBms), ESSID, channel) 
+# Tested with iw version 3.15 on OpenWrt and 3.4 on Debian GNU/Linux
+
+DATA=/tmp/data
+NIC=$(iw dev | grep Interface | awk '{ print $2 }')
+TMPFILE=/tmp/scan.log
+SCAN=$DATA/networks
+S=1;E=5;
+
+# Scrape 'iw' scan output and write to temporary file
+iw dev $NIC scan | grep -E '^BSS|SSID|DS Parameter set: channel|signal:|freq:'\
+| sed -e 's/BSS\ //' -e 's/(on.*$//'  -e 's/DS Parameter\ set:\ channel\ // ' \
+-e 's/SSID:\ //' -e 's/freq://' -e 's/signal: //' -e 's/dBm//'\
+    > $TMPFILE && LEN=$(cat $TMPFILE | wc -l)
+
+# Count lines in 5's
+for i in $(seq 1 $((LEN/5)))
+    do
+        LINES=$(sed -n "$S,$E p;$E q" $TMPFILE)
+        # Test for hidden ESSIDs. Allow for ESSIDs with spaces
+        if [ $(echo $LINES | awk '{print substr($0, index($0,$4))}' | sed \
+            's/\(.*\)[[:space:]].*/\1/' | wc -c )  -gt 1 ]
+            then
+                # Replace all whitespace with commas except whitespace in
+                # ESSID field
+                echo $LINES | awk -F ' ' -v OFS=',' '{print $1, $2, $3, \
+                substr($0, index($0,$4))}' | sed 's/\(.*\)[[:space:]]/\1,/'
+        fi
+        # Increment
+            ((S+=5))
+            ((E+=5))
+    done > $SCAN
+rm $TMPFILE