collectd-nagios: Let '-n LIST' list all available datasets.

diff --git a/src/collectd-nagios.c b/src/collectd-nagios.c
index af8744d..d3923f1 100644 (file)
--- a/src/collectd-nagios.c
+++ b/src/collectd-nagios.c
@@ -269,6 +269,42 @@ static void usage (const char *name)
        exit (1);
 } /* void usage */
 
+static int do_listval (lcc_connection_t *connection)
+{
+       lcc_identifier_t *ret_ident = NULL;
+       size_t ret_ident_num = 0;
+
+       int status;
+       size_t i;
+
+       status = lcc_listval (connection, &ret_ident, &ret_ident_num);
+       if (status != 0) {
+               printf ("UNKNOWN: %s\n", lcc_strerror (connection));
+               if (ret_ident != NULL)
+                       free (ret_ident);
+               return (RET_UNKNOWN);
+       }
+
+       for (i = 0; i < ret_ident_num; ++i) {
+               char id[1024];
+
+               status = lcc_identifier_to_string (connection,
+                               id, sizeof (id), ret_ident + i);
+               if (status != 0) {
+                       printf ("ERROR: listval: Failed to convert returned "
+                                       "identifier to a string: %s\n",
+                                       lcc_strerror (connection));
+                       continue;
+               }
+
+               printf ("%s\n", id);
+       }
+
+       if (ret_ident != NULL)
+               free (ret_ident);
+       return (RET_OKAY);
+} /* int do_listval */
+
 static int do_check_con_none (size_t values_num,
                double *values, char **values_names)
 {
@@ -508,34 +544,20 @@ static int do_check_con_percentage (size_t values_num,
        return (status_code);
 } /* int do_check_con_percentage */
 
-static int do_check (void)
+static int do_check (lcc_connection_t *connection)
 {
-       lcc_connection_t *connection;
        gauge_t *values;
        char   **values_names;
        size_t   values_num;
-       char address[1024];
        char ident_str[1024];
        lcc_identifier_t ident;
        size_t i;
        int status;
 
-       snprintf (address, sizeof (address), "unix:%s", socket_file_g);
-       address[sizeof (address) - 1] = 0;
-
        snprintf (ident_str, sizeof (ident_str), "%s/%s",
                        hostname_g, value_string_g);
        ident_str[sizeof (ident_str) - 1] = 0;
 
-       connection = NULL;
-       status = lcc_connect (address, &connection);
-       if (status != 0)
-       {
-               printf ("ERROR: Connecting to daemon at %s failed.\n",
-                               socket_file_g);
-               return (RET_CRITICAL);
-       }
-
        memset (&ident, 0, sizeof (ident));
        status = lcc_string_to_identifier (connection, &ident, ident_str);
        if (status != 0)
@@ -583,6 +605,11 @@ static int do_check (void)
 
 int main (int argc, char **argv)
 {
+       char address[1024];
+       lcc_connection_t *connection;
+
+       int status;
+
        range_critical_g.min = NAN;
        range_critical_g.max = NAN;
        range_critical_g.invert = 0;
@@ -664,11 +691,26 @@ int main (int argc, char **argv)
        }
 
        if ((socket_file_g == NULL) || (value_string_g == NULL)
-                       || (hostname_g == NULL))
+                       || ((hostname_g == NULL) && (strcasecmp (value_string_g, "LIST"))))
        {
                fprintf (stderr, "Missing required arguments.\n");
                usage (argv[0]);
        }
 
-       return (do_check ());
+       snprintf (address, sizeof (address), "unix:%s", socket_file_g);
+       address[sizeof (address) - 1] = 0;
+
+       connection = NULL;
+       status = lcc_connect (address, &connection);
+       if (status != 0)
+       {
+               printf ("ERROR: Connecting to daemon at %s failed.\n",
+                               socket_file_g);
+               return (RET_CRITICAL);
+       }
+
+       if (0 == strcasecmp (value_string_g, "LIST"))
+               return (do_listval (connection));
+
+       return (do_check (connection));
 } /* int main */