Merge branch 'collectd-4.4'

[collectd.git] / contrib / examples / myplugin.c

diff --git a/contrib/examples/myplugin.c b/contrib/examples/myplugin.c
index fc7856b..f68cc1a 100644 (file)
--- a/contrib/examples/myplugin.c
+++ b/contrib/examples/myplugin.c
@@ -18,7 +18,8 @@
  *   is optional
  */
 
-#include <stdio.h>
+#if ! HAVE_CONFIG_H
+
 #include <stdlib.h>
 
 #include <string.h>
@@ -33,6 +34,10 @@
 # undef __USE_ISOC99
 #endif /* DISABLE_ISOC99 */
 
+#include <time.h>
+
+#endif /* ! HAVE_CONFIG */
+
 #include <collectd/collectd.h>
 #include <collectd/common.h>
 #include <collectd/plugin.h>
@@ -54,6 +59,12 @@ static data_source_t dsrc[1] =
  * - name of the data set
  * - number of data sources
  * - list of data sources
+ *
+ * NOTE: If you're defining a custom data-set, you have to make that known to
+ * any servers as well. Else, the server is not able to store values using the
+ * type defined by that data-set.
+ * It is strongly recommended to use one of the types and data-sets
+ * pre-defined in the types.db file.
  */
 static data_set_t ds =
 {
@@ -87,14 +98,15 @@ static int my_read (void)
        vl.values     = values;
        vl.values_len = 1;
        vl.time       = time (NULL);
-       strcpy (vl.host, hostname_g);
-       strcpy (vl.plugin, "myplugin");
+       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+       sstrncpy (vl.plugin, "myplugin", sizeof (vl.plugin));
        /* optionally set vl.plugin_instance and vl.type_instance to reasonable
         * values (default: "") */
 
        /* dispatch the values to collectd which passes them on to all registered
         * write functions - the first argument is used to lookup the data set
-        * definition */
+        * definition (it is strongly recommended to use a type defined in the
+        * types.db file) */
        plugin_dispatch_values ("myplugin", &vl);
 
        /* A return value != 0 indicates an error and the plugin will be skipped
@@ -146,6 +158,44 @@ static void my_log (int severity, const char *msg)
 } /* static void my_log (int, const char *) */
 
 /*
+ * This function is called when plugin_dispatch_notification () has been used.
+ */
+static int my_notify (const notification_t *notif)
+{
+       char time_str[32] = "";
+       struct tm *tm = NULL;
+
+       int n = 0;
+
+       if (NULL == (tm = localtime (&notif->time)))
+               time_str[0] = '\0';
+
+       n = strftime (time_str, 32, "%F %T", tm);
+       if (n >= 32) n = 31;
+       time_str[n] = '\0';
+
+       printf ("NOTIF (%s): %i - ", time_str, notif->severity);
+
+       if ('\0' != *notif->host)
+               printf ("%s: ", notif->host);
+
+       if ('\0' != *notif->plugin)
+               printf ("%s: ", notif->plugin);
+
+       if ('\0' != *notif->plugin_instance)
+               printf ("%s: ", notif->plugin_instance);
+
+       if ('\0' != *notif->type)
+               printf ("%s: ", notif->type);
+
+       if ('\0' != *notif->type_instance)
+               printf ("%s: ", notif->type_instance);
+
+       printf ("%s\n", notif->message);
+       return 0;
+} /* static int my_notify (notification_t *) */
+
+/*
  * This function is called before shutting down collectd.
  */
 static int my_shutdown (void)
@@ -161,6 +211,7 @@ static int my_shutdown (void)
 void module_register (void)
 {
        plugin_register_log ("myplugin", my_log);
+       plugin_register_notification ("myplugin", my_notify);
        plugin_register_data_set (&ds);
        plugin_register_read ("myplugin", my_read);
        plugin_register_init ("myplugin", my_init);