/**
* collectd - src/rrdtool.c
- * Copyright (C) 2006-2008 Florian octo Forster
+ * Copyright (C) 2006-2013 Florian octo Forster
* Copyright (C) 2008-2008 Sebastian Harl
* Copyright (C) 2009 Mariusz Gronczewski
*
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
- * Florian octo Forster <octo at verplant.org>
+ * Florian octo Forster <octo at collectd.org>
* Sebastian Harl <sh at tokkee.org>
* Mariusz Gronczewski <xani666 at gmail.com>
**/
#include "plugin.h"
#include "common.h"
#include "utils_avltree.h"
+#include "utils_random.h"
#include "utils_rrdcreate.h"
#include <rrd.h>
} /* int srrd_update */
#endif /* !HAVE_THREADSAFE_LIBRRD */
-static int value_list_to_string (char *buffer, int buffer_len,
+static int value_list_to_string_multiple (char *buffer, int buffer_len,
const data_set_t *ds, const value_list_t *vl)
{
int offset;
} /* for ds->ds_num */
return (0);
+} /* int value_list_to_string_multiple */
+
+static int value_list_to_string (char *buffer, int buffer_len,
+ const data_set_t *ds, const value_list_t *vl)
+{
+ int status;
+ time_t tt;
+
+ if (ds->ds_num != 1)
+ return (value_list_to_string_multiple (buffer, buffer_len,
+ ds, vl));
+
+ tt = CDTIME_T_TO_TIME_T (vl->time);
+ switch (ds->ds[0].type)
+ {
+ case DS_TYPE_DERIVE:
+ status = ssnprintf (buffer, buffer_len, "%u:%"PRIi64,
+ (unsigned) tt, vl->values[0].derive);
+ break;
+ case DS_TYPE_GAUGE:
+ status = ssnprintf (buffer, buffer_len, "%u:%lf",
+ (unsigned) tt, vl->values[0].gauge);
+ break;
+ case DS_TYPE_COUNTER:
+ status = ssnprintf (buffer, buffer_len, "%u:%llu",
+ (unsigned) tt, vl->values[0].counter);
+ break;
+ case DS_TYPE_ABSOLUTE:
+ status = ssnprintf (buffer, buffer_len, "%u:%"PRIu64,
+ (unsigned) tt, vl->values[0].absolute);
+ break;
+ default:
+ return (EINVAL);
+ }
+
+ if ((status < 1) || (status >= buffer_len))
+ return (ENOMEM);
+
+ return (0);
} /* int value_list_to_string */
-static int value_list_to_filename (char *buffer, int buffer_len,
- const data_set_t __attribute__((unused)) *ds, const value_list_t *vl)
+static int value_list_to_filename (char *buffer, size_t buffer_size,
+ value_list_t const *vl)
{
- int offset = 0;
+ char const suffix[] = ".rrd";
int status;
+ size_t len;
if (datadir != NULL)
{
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s/", datadir);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ size_t datadir_len = strlen (datadir) + 1;
+
+ if (datadir_len >= buffer_size)
+ return (ENOMEM);
+
+ sstrncpy (buffer, datadir, buffer_size);
+ buffer[datadir_len - 1] = '/';
+ buffer[datadir_len] = 0;
+
+ buffer += datadir_len;
+ buffer_size -= datadir_len;
}
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s/", vl->host);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ status = FORMAT_VL (buffer, buffer_size, vl);
+ if (status != 0)
+ return (status);
- if (strlen (vl->plugin_instance) > 0)
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s-%s/", vl->plugin, vl->plugin_instance);
- else
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s/", vl->plugin);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ len = strlen (buffer);
+ assert (len < buffer_size);
+ buffer += len;
+ buffer_size -= len;
- if (strlen (vl->type_instance) > 0)
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s-%s.rrd", vl->type, vl->type_instance);
- else
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s.rrd", vl->type);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ if (buffer_size <= sizeof (suffix))
+ return (ENOMEM);
+ memcpy (buffer, suffix, sizeof (suffix));
return (0);
} /* int value_list_to_filename */
static int64_t rrd_get_random_variation (void)
{
- double dbl_timeout;
- cdtime_t ctm_timeout;
- double rand_fact;
- _Bool negative;
- int64_t ret;
+ long min;
+ long max;
if (random_timeout <= 0)
return (0);
random_timeout = cache_timeout;
}
- /* This seems a bit complicated, but "random_timeout" is likely larger than
- * RAND_MAX, so we can't simply use modulo here. */
- dbl_timeout = CDTIME_T_TO_DOUBLE (random_timeout);
- rand_fact = ((double) random ())
- / ((double) RAND_MAX);
- negative = (_Bool) (random () % 2);
-
- ctm_timeout = DOUBLE_TO_CDTIME_T (dbl_timeout * rand_fact);
-
- ret = (int64_t) ctm_timeout;
- if (negative)
- ret *= -1;
+ max = (long) (random_timeout / 2);
+ min = max - ((long) random_timeout);
- return (ret);
+ return ((int64_t) cdrand_range (min, max));
} /* int64_t rrd_get_random_variation */
static int rrd_cache_insert (const char *filename,
return -1;
}
- if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
+ if (value_list_to_filename (filename, sizeof (filename), vl) != 0)
return (-1);
if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
projects / collectd.git / blobdiff