Skip to content
Find file
Fetching contributors…
Cannot retrieve contributors at this time
374 lines (327 sloc) 8.27 KB
/**
* collectd - src/csv.c
* Copyright (C) 2007-2009 Florian octo Forster
* Copyright (C) 2009 Doug MacEachern
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
* Florian octo Forster <octo at verplant.org>
* Doug MacEachern <dougm@hyperic.com>
**/
#include "collectd.h"
#include "plugin.h"
#include "common.h"
#include "utils_cache.h"
#include "utils_parse_option.h"
/*
* Private variables
*/
static const char *config_keys[] =
{
"DataDir",
"StoreRates"
};
static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
static char *datadir = NULL;
static int store_rates = 0;
static int use_stdio = 0;
static int value_list_to_string (char *buffer, int buffer_len,
const data_set_t *ds, const value_list_t *vl)
{
int offset;
int status;
int i;
gauge_t *rates = NULL;
assert (0 == strcmp (ds->type, vl->type));
memset (buffer, '\0', buffer_len);
status = ssnprintf (buffer, buffer_len, "%.3f",
CDTIME_T_TO_DOUBLE (vl->time));
if ((status < 1) || (status >= buffer_len))
return (-1);
offset = status;
for (i = 0; i < ds->ds_num; i++)
{
if ((ds->ds[i].type != DS_TYPE_COUNTER)
&& (ds->ds[i].type != DS_TYPE_GAUGE)
&& (ds->ds[i].type != DS_TYPE_DERIVE)
&& (ds->ds[i].type != DS_TYPE_ABSOLUTE))
return (-1);
if (ds->ds[i].type == DS_TYPE_GAUGE)
{
status = ssnprintf (buffer + offset, buffer_len - offset,
",%lf", vl->values[i].gauge);
}
else if (store_rates != 0)
{
if (rates == NULL)
rates = uc_get_rate (ds, vl);
if (rates == NULL)
{
WARNING ("csv plugin: "
"uc_get_rate failed.");
return (-1);
}
status = ssnprintf (buffer + offset,
buffer_len - offset,
",%lf", rates[i]);
}
else if (ds->ds[i].type == DS_TYPE_COUNTER)
{
status = ssnprintf (buffer + offset,
buffer_len - offset,
",%llu",
vl->values[i].counter);
}
else if (ds->ds[i].type == DS_TYPE_DERIVE)
{
status = ssnprintf (buffer + offset,
buffer_len - offset,
",%"PRIi64,
vl->values[i].derive);
}
else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
{
status = ssnprintf (buffer + offset,
buffer_len - offset,
",%"PRIu64,
vl->values[i].absolute);
}
if ((status < 1) || (status >= (buffer_len - offset)))
{
sfree (rates);
return (-1);
}
offset += status;
} /* for ds->ds_num */
sfree (rates);
return (0);
} /* int value_list_to_string */
static int value_list_to_filename (char *buffer, int buffer_len,
const data_set_t *ds, const value_list_t *vl)
{
int offset = 0;
int status;
assert (0 == strcmp (ds->type, vl->type));
if (datadir != NULL)
{
status = ssnprintf (buffer + offset, buffer_len - offset,
"%s/", datadir);
if ((status < 1) || (status >= buffer_len - offset))
return (-1);
offset += status;
}
status = ssnprintf (buffer + offset, buffer_len - offset,
"%s/", vl->host);
if ((status < 1) || (status >= buffer_len - offset))
return (-1);
offset += 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;
if (strlen (vl->type_instance) > 0)
status = ssnprintf (buffer + offset, buffer_len - offset,
"%s-%s", vl->type, vl->type_instance);
else
status = ssnprintf (buffer + offset, buffer_len - offset,
"%s", vl->type);
if ((status < 1) || (status >= buffer_len - offset))
return (-1);
offset += status;
if (!use_stdio)
{
time_t now;
struct tm stm;
/* TODO: Find a way to minimize the calls to `localtime_r',
* since they are pretty expensive.. */
now = time (NULL);
if (localtime_r (&now, &stm) == NULL)
{
ERROR ("csv plugin: localtime_r failed");
return (1);
}
strftime (buffer + offset, buffer_len - offset,
"-%Y-%m-%d", &stm);
}
return (0);
} /* int value_list_to_filename */
static int csv_create_file (const char *filename, const data_set_t *ds)
{
FILE *csv;
int i;
if (check_create_dir (filename))
return (-1);
csv = fopen (filename, "w");
if (csv == NULL)
{
char errbuf[1024];
ERROR ("csv plugin: fopen (%s) failed: %s",
filename,
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
fprintf (csv, "epoch");
for (i = 0; i < ds->ds_num; i++)
fprintf (csv, ",%s", ds->ds[i].name);
fprintf (csv, "\n");
fclose (csv);
return 0;
} /* int csv_create_file */
static int csv_config (const char *key, const char *value)
{
if (strcasecmp ("DataDir", key) == 0)
{
if (datadir != NULL)
free (datadir);
if (strcasecmp ("stdout", value) == 0)
{
use_stdio = 1;
return (0);
}
else if (strcasecmp ("stderr", value) == 0)
{
use_stdio = 2;
return (0);
}
datadir = strdup (value);
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 if (strcasecmp ("StoreRates", key) == 0)
{
if (IS_TRUE (value))
store_rates = 1;
else
store_rates = 0;
}
else
{
return (-1);
}
return (0);
} /* int csv_config */
static int csv_write (const data_set_t *ds, const value_list_t *vl,
user_data_t __attribute__((unused)) *user_data)
{
struct stat statbuf;
char filename[512];
char values[4096];
FILE *csv;
int csv_fd;
struct flock fl;
int status;
if (0 != strcmp (ds->type, vl->type)) {
ERROR ("csv plugin: DS type does not match value list type");
return -1;
}
if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
return (-1);
DEBUG ("csv plugin: csv_write: filename = %s;", filename);
if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
return (-1);
if (use_stdio)
{
size_t i;
escape_string (filename, sizeof (filename));
/* Replace commas by colons for PUTVAL compatible output. */
for (i = 0; i < sizeof (values); i++)
{
if (values[i] == 0)
break;
else if (values[i] == ',')
values[i] = ':';
}
fprintf (use_stdio == 1 ? stdout : stderr,
"PUTVAL %s interval=%.3f %s\n",
filename,
CDTIME_T_TO_DOUBLE (vl->interval),
values);
return (0);
}
if (stat (filename, &statbuf) == -1)
{
if (errno == ENOENT)
{
if (csv_create_file (filename, ds))
return (-1);
}
else
{
char errbuf[1024];
ERROR ("stat(%s) failed: %s", filename,
sstrerror (errno, errbuf,
sizeof (errbuf)));
return (-1);
}
}
else if (!S_ISREG (statbuf.st_mode))
{
ERROR ("stat(%s): Not a regular file!",
filename);
return (-1);
}
csv = fopen (filename, "a");
if (csv == NULL)
{
char errbuf[1024];
ERROR ("csv plugin: fopen (%s) failed: %s", filename,
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
csv_fd = fileno (csv);
memset (&fl, '\0', sizeof (fl));
fl.l_start = 0;
fl.l_len = 0; /* till end of file */
fl.l_pid = getpid ();
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
status = fcntl (csv_fd, F_SETLK, &fl);
if (status != 0)
{
char errbuf[1024];
ERROR ("csv plugin: flock (%s) failed: %s", filename,
sstrerror (errno, errbuf, sizeof (errbuf)));
fclose (csv);
return (-1);
}
fprintf (csv, "%s\n", values);
/* The lock is implicitely released. I we don't release it explicitely
* because the `FILE *' may need to flush a cache first */
fclose (csv);
return (0);
} /* int csv_write */
void module_register (void)
{
plugin_register_config ("csv", csv_config,
config_keys, config_keys_num);
plugin_register_write ("csv", csv_write, /* user_data = */ NULL);
} /* void module_register */
Jump to Line
Something went wrong with that request. Please try again.