Added new function ContainsString to search for the needle in the haystack

include/functions

@@ -30,6 +30,7 @@
 #    CheckUpdates               Determine if a new version of Lynis is available
 #    CreateTempFile             Create a temporary file
 #    counttests                 Count number of performed tests
+#    ContainsString             Find the needle (string) in the haystack (another string)
 #    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
@@ -155,6 +156,21 @@
          fi
       }
 
+    ################################################################################
+    # Name        : ContainsString()
+    # Description : Search a specific string (or regular expression) in another
+    # Returns     : (0 - True, 1 - False)
+    ################################################################################
+
+    ContainsString() {
+        if [ $# -ne 2 ]; then ReportException "ContainsString" "Incorrect number of arguments for ContainsStrings function"; fi
+        RETVAL=1
+        local FIND=`echo "$2" | egrep "$1"`
+        if [ ! "${FIND}" = "" ]; then RETVAL=0; fi
+
+        return $RETVAL
+    }
+
     ################################################################################
     # Name        : TestCase_Equal()
     # Description : Test case for checking if value whether value is equal to value