1 files changed, 27 insertions, 3 deletions

diff --git a/plugins/check_snmp.c b/plugins/check_snmp.c
index abe54cf..bd13e57 100644
--- a/plugins/check_snmp.c
+++ b/plugins/check_snmp.c
@@ -113,6 +113,7 @@ char *authproto = NULL;
 char *privproto = NULL;
 char *authpasswd = NULL;
 char *privpasswd = NULL;
+int nulloid = STATE_UNKNOWN;
 char **oids = NULL;
 size_t oids_size = 0;
 char *label;
@@ -472,8 +473,16 @@ main (int argc, char **argv)
                                 print_thresholds("  thresholds", thlds[i]);
                         }
                         ptr = strpbrk (show, "-0123456789");
-                        if (ptr == NULL)
-                                die (STATE_UNKNOWN,_("No valid data returned (%s)\n"), show);
+                        if (ptr == NULL){
+                                if (nulloid == 3)
+                                        die (STATE_UNKNOWN,_("No valid data returned (%s)\n"), show);
+                                else if (nulloid == 0)
+                                        die (STATE_OK,_("No valid data returned (%s)\n"), show);
+                                else if (nulloid == 1)
+                                        die (STATE_WARNING,_("No valid data returned (%s)\n"), show);
+                                else if (nulloid == 2)
+                                        die (STATE_CRITICAL,_("No valid data returned (%s)\n"), show);
+                        }
                         while (i >= response_size) {
                                 response_size += OID_COUNT_STEP;
                                 response_value = realloc(response_value, response_size * sizeof(*response_value));
@@ -661,6 +670,7 @@ process_arguments (int argc, char **argv)
                 {"oid", required_argument, 0, 'o'},
                 {"object", required_argument, 0, 'o'},
                 {"delimiter", required_argument, 0, 'd'},
+                {"nulloid", required_argument, 0, 'z'},
                 {"output-delimiter", required_argument, 0, 'D'},
                 {"string", required_argument, 0, 's'},
                 {"timeout", required_argument, 0, 't'},
@@ -705,7 +715,7 @@ process_arguments (int argc, char **argv)
         }
 
         while (1) {
-                c = getopt_long (argc, argv, "nhvVO46t:c:w:H:C:o:e:E:d:D:s:t:R:r:l:u:p:m:P:N:L:U:a:x:A:X:",
+                c = getopt_long (argc, argv, "nhvVO46t:c:w:H:C:o:e:E:d:D:s:t:R:r:l:u:p:m:P:N:L:U:a:x:A:X:z:",
                                                                          longopts, &option);
 
                 if (c == -1 || c == EOF)
@@ -816,6 +826,12 @@ process_arguments (int argc, char **argv)
                                         eval_method[j+1] |= CRIT_PRESENT;
                         }
                         break;
+                case 'z':       /* Null OID Return Check */
+                        if (!is_integer (optarg))
+                                usage2 (_("Exit status must be a positive integer"), optarg);
+                        else
+                                nulloid = atoi(optarg);
+                        break;
                 case 's':                                                                       /* string or substring */
                         strncpy (string_value, optarg, sizeof (string_value) - 1);
                         string_value[sizeof (string_value) - 1] = 0;
@@ -1181,6 +1197,14 @@ print_help (void)
         printf ("    %s \"%s\"\n", _("Delimiter to use when parsing returned data. Default is"), DEFAULT_DELIMITER);
         printf ("    %s\n", _("Any data on the right hand side of the delimiter is considered"));
         printf ("    %s\n", _("to be the data that should be used in the evaluation."));
+        printf (" %s\n", "-z, --nulloid=#");
+        printf ("    %s\n", _("If the check returns a 0 length string or NULL value"));
+        printf ("    %s\n", _("This option allows you to choose what status you want it to exit"));
+        printf ("    %s\n", _("Excluding this option renders the default exit of 3(STATE_UNKNOWN)"));
+        printf ("    %s\n", _("0 = OK"));
+        printf ("    %s\n", _("1 = WARNING"));
+        printf ("    %s\n", _("2 = CRITICAL"));
+        printf ("    %s\n", _("3 = UNKNOWN"));
 
         /* Tests Against Integers */
         printf (" %s\n", "-w, --warning=THRESHOLD(s)");