X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Frrdtool.c;h=56ef581e3596a522656380da219f408bec0dce43;hb=90ac9957e95378d729bce1c00bb0ef2efadab33e;hp=4d4b87cbeaa38b63201dcb12153596caaa04a1dc;hpb=27f6db4769cac5727888c327dbbf1b88da4f3ca6;p=collectd.git

diff --git a/src/rrdtool.c b/src/rrdtool.c
index 4d4b87cb..56ef581e 100644
--- a/src/rrdtool.c
+++ b/src/rrdtool.c
@@ -337,6 +337,7 @@ static int rrd_create_file (char *filename, const data_set_t *ds, const value_li
 	int ds_num;
 	int i, j;
 	char stepsize_str[16];
+	char begin_str[16];
 	int status = 0;
 
 	if (check_create_dir (filename))
@@ -354,7 +355,7 @@ static int rrd_create_file (char *filename, const data_set_t *ds, const value_li
 		return (-1);
 	}
 
-	argc = ds_num + rra_num + 4;
+	argc = ds_num + rra_num + 6;
 
 	if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
 	{
@@ -375,12 +376,23 @@ static int rrd_create_file (char *filename, const data_set_t *ds, const value_li
 		return (-1);
 	}
 
+	assert (vl->time > 10);
+	status = snprintf (begin_str, sizeof (begin_str),
+			"%llu", (unsigned long long) (vl->time - 10));
+	if ((status < 1) || (status >= sizeof (begin_str)))
+	{
+		ERROR ("rrdtool plugin: snprintf failed.");
+		return (-1);
+	}
+
 	argv[0] = "create";
 	argv[1] = filename;
-	argv[2] = "-s";
-	argv[3] = stepsize_str;
+	argv[2] = "-b";
+	argv[3] = begin_str;
+	argv[4] = "-s";
+	argv[5] = stepsize_str;
 
-	j = 4;
+	j = 6;
 	for (i = 0; i < ds_num; i++)
 		argv[j++] = ds_def[i];
 	for (i = 0; i < rra_num; i++)