From 648535893fb2b67e189f71c17eb56d44d5661b49 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@leeloo.lan.home.verplant.org>
Date: Mon, 10 Jul 2006 11:42:10 +0200
Subject: [PATCH] Implemented `plugin_complain' and `plugin_relief' for better
 error-logging in plugins.

---
 src/plugin.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/plugin.h | 17 +++++++++++++++--
 2 files changed, 66 insertions(+), 2 deletions(-)

diff --git a/src/plugin.c b/src/plugin.c
index 2f521570..be28671a 100644
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -350,3 +350,54 @@ void plugin_submit (char *type, char *inst, char *val)
 	else
 		plugin_write (NULL, type, inst, val);
 }
+
+void plugin_complain (int level, complain_t *c, const char *format, ...)
+{
+	char message[512];
+	va_list ap;
+	int step;
+
+	if (c->delay > 0)
+	{
+		c->delay--;
+		return;
+	}
+
+	step = atoi (COLLECTD_STEP);
+	assert (step > 0);
+
+	if (c->interval < step)
+		c->interval = step;
+	else
+		c->interval *= 2;
+
+	if (c->interval > 86400)
+		c->interval = 86400;
+
+	c->delay = c->interval / step;
+
+	va_start (ap, format);
+	vsnprintf (message, 512, format, ap);
+	message[511] = '\0';
+	va_end (ap);
+
+	syslog (level, message);
+}
+
+void plugin_relief (int level, complain_t *c, const char *format, ...)
+{
+	char message[512];
+	va_list ap;
+
+	if (c->interval == 0)
+		return;
+
+	c->interval = 0;
+
+	va_start (ap, format);
+	vsnprintf (message, 512, format, ap);
+	message[511] = '\0';
+	va_end (ap);
+
+	syslog (level, message);
+}
diff --git a/src/plugin.h b/src/plugin.h
index e1303c76..e1e2e7cf 100644
--- a/src/plugin.h
+++ b/src/plugin.h
@@ -1,3 +1,6 @@
+#ifndef PLUGIN_H
+#define PLUGIN_H
+
 /**
  * collectd - src/plugin.h
  * Copyright (C) 2005,2006  Florian octo Forster
@@ -20,8 +23,14 @@
  *   Florian octo Forster <octo at verplant.org>
  **/
 
-#ifndef PLUGIN_H
-#define PLUGIN_H
+/*
+ *
+ */
+typedef struct complain_s
+{
+	unsigned int interval; /* how long we wait for reporting this error again */
+	unsigned int delay;    /* how many more iterations we still need to wait */
+} complain_t;
 
 /*
  * NAME
@@ -117,4 +126,8 @@ void plugin_write    (char *host, char *type, char *inst, char *val);
 
 void plugin_submit   (char *type, char *inst, char *val);
 
+
+void plugin_complain (int level, complain_t *c, const char *format, ...);
+void plugin_relief (int level, complain_t *c, const char *format, ...);
+
 #endif /* PLUGIN_H */
-- 
2.30.2