From a92df91091855f18cbf9191a7e604a5dcd23852b Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@leeloo.lan.home.verplant.org>
Date: Mon, 12 Feb 2007 19:55:19 +0100
Subject: [PATCH] rrdtool plugin: Implemented a `DataDir' config option to be
 able to store the RRD-files anywhere.

---
 src/collectd.conf.pod |  5 +++++
 src/rrdtool.c         | 34 +++++++++++++++++++++++++++++++++-
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index 45acb682..33690ee5 100644
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -318,6 +318,11 @@ at once reduces IO-operations and thus lessens the load produced by updating
 the files. The tradeoff is that the graphs kind of "drag behind" and that more
 memory is used.
 
+=item B<DataDir> I<Directory>
+
+Set the directory to store RRD-files under. Per default RRD-files are generated
+beneath the daemons working directory, i.E<nbsp>e. the B<BaseDir>.
+
 =back
 
 =head2 Plugin C<sensors>
diff --git a/src/rrdtool.c b/src/rrdtool.c
index 5a9fa8c6..beb5a73e 100644
--- a/src/rrdtool.c
+++ b/src/rrdtool.c
@@ -76,9 +76,12 @@ static int rra_types_num = 3;
 static const char *config_keys[] =
 {
 	"CacheTimeout",
+	"DataDir",
 	NULL
 };
-static int config_keys_num = 1;
+static int config_keys_num = 2;
+
+static char *datadir = NULL;
 
 static int      cache_timeout = 0;
 static time_t   cache_flush;
@@ -365,6 +368,15 @@ static int value_list_to_filename (char *buffer, int buffer_len,
 	int offset = 0;
 	int status;
 
+	if (datadir != NULL)
+	{
+		status = snprintf (buffer + offset, buffer_len - offset,
+				"%s/", datadir);
+		if ((status < 1) || (status >= buffer_len - offset))
+			return (-1);
+		offset += status;
+	}
+
 	status = snprintf (buffer + offset, buffer_len - offset,
 			"%s/", vl->host);
 	if ((status < 1) || (status >= buffer_len - offset))
@@ -617,6 +629,26 @@ static int rrd_config (const char *key, const char *val)
 		}
 		cache_timeout = tmp;
 	}
+	else if (strcasecmp ("DataDir", key) == 0)
+	{
+		if (datadir != NULL)
+			free (datadir);
+		datadir = strdup (val);
+		if (datadir != NULL)
+		{
+			int len = strlen (datadir);
+			while ((len > 0) && (datadir[len - 1] == '/'))
+			{
+				len--;
+				datadir[len] = '\0';
+			}
+			if (len <= 0)
+			{
+				free (datadir);
+				datadir = NULL;
+			}
+		}
+	}
 	else
 	{
 		return (-1);
-- 
2.30.2