Added DigitsOnly function to extract only numbers from a text string

include/functions

@@ -25,6 +25,7 @@
 #    CheckUpdates               Determine if a new version of Lynis is available
 #    counttests                 Count number of performed tests
 #    Debug                      Display additional information on the screen (not suited for cronjob)
+#    DigitsOnly                 Return only the digits from a string
 #    DirectoryExists            Check if a directory exists on the disk
 #    Display                    Output text to screen with colors and identation
 #    ExitClean                  Stop the program (cleanly), with exit code 0
@@ -181,6 +182,23 @@
         if [ ${DEBUG} -eq 1 ]; then echo "DEBUG: $1"; fi
       }
 
+    ################################################################################
+    # Name        : DigitsOnly
+    # Description : Only extract numbers from a string
+    # Returns     : Digits only string
+    ################################################################################
+
+    DigitsOnly()
+      {
+        VALUE=$1
+        logtext "Value is now: ${VALUE}"
+        if [ ! "${AWKBINARY}" = "" ]; then
+            VALUE=`echo ${VALUE} | grep -Eo '[0-9]{1,}'`
+        fi
+        logtext "Returning value: ${VALUE}"
+        #return $VALUE
+      }
+
     # Display text
     Display()
       {