Add sudo management in main and utils

* perform readonly checks as a regular user
    * sudo -n is used for checks requiring root privileges
    * increase accountability by providing log of individual access to sensitive files

lib/main.sh

@@ -4,6 +4,7 @@ SCRIPT_NAME=${LONG_SCRIPT_NAME%.sh}
 CRITICAL_ERRORS_NUMBER=0 # This will be used to see if a script failed, or passed
 status=""
 forcedstatus=""
+SUDO_CMD=""
 
 [ -r $CIS_ROOT_DIR/lib/constants.sh  ] && . $CIS_ROOT_DIR/lib/constants.sh
 [ -r $CIS_ROOT_DIR/etc/hardening.cfg ] && . $CIS_ROOT_DIR/etc/hardening.cfg
@@ -31,6 +32,9 @@ while [[ $# > 0 ]]; do
             info "Audit argument passed but script is disabled"
         fi
         ;;
+        --sudo)
+        SUDO_CMD="sudo -n"
+        ;;
         *)
             debug "Unknown option passed"
         ;;