3 * Copyright (C) 2007 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
25 #include "utils_cache.h"
30 static const char *config_keys[] =
35 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
37 static char *datadir = NULL;
38 static int store_rates = 0;
40 static int value_list_to_string (char *buffer, int buffer_len,
41 const data_set_t *ds, const value_list_t *vl)
46 gauge_t *rates = NULL;
48 memset (buffer, '\0', buffer_len);
50 status = snprintf (buffer, buffer_len, "%u", (unsigned int) vl->time);
51 if ((status < 1) || (status >= buffer_len))
55 for (i = 0; i < ds->ds_num; i++)
57 if ((ds->ds[i].type != DS_TYPE_COUNTER)
58 && (ds->ds[i].type != DS_TYPE_GAUGE))
61 if (ds->ds[i].type == DS_TYPE_COUNTER)
65 status = snprintf (buffer + offset,
68 vl->values[i].counter);
70 else /* if (store_rates == 1) */
73 rates = uc_get_rate (ds, vl);
76 WARNING ("csv plugin: "
77 "uc_get_rate failed.");
80 status = snprintf (buffer + offset,
85 else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
87 status = snprintf (buffer + offset, buffer_len - offset,
88 ",%lf", vl->values[i].gauge);
91 if ((status < 1) || (status >= (buffer_len - offset)))
98 } /* for ds->ds_num */
102 } /* int value_list_to_string */
104 static int value_list_to_filename (char *buffer, int buffer_len,
105 const data_set_t *ds, const value_list_t *vl)
112 status = snprintf (buffer + offset, buffer_len - offset,
114 if ((status < 1) || (status >= buffer_len - offset))
119 status = snprintf (buffer + offset, buffer_len - offset,
121 if ((status < 1) || (status >= buffer_len - offset))
125 if (strlen (vl->plugin_instance) > 0)
126 status = snprintf (buffer + offset, buffer_len - offset,
127 "%s-%s/", vl->plugin, vl->plugin_instance);
129 status = snprintf (buffer + offset, buffer_len - offset,
131 if ((status < 1) || (status >= buffer_len - offset))
135 if (strlen (vl->type_instance) > 0)
136 status = snprintf (buffer + offset, buffer_len - offset,
137 "%s-%s", ds->type, vl->type_instance);
139 status = snprintf (buffer + offset, buffer_len - offset,
141 if ((status < 1) || (status >= buffer_len - offset))
149 /* TODO: Find a way to minimize the calls to `localtime_r',
150 * since they are pretty expensive.. */
152 if (localtime_r (&now, &stm) == NULL)
154 ERROR ("csv plugin: localtime_r failed");
158 strftime (buffer + offset, buffer_len - offset,
163 } /* int value_list_to_filename */
165 static int csv_create_file (const char *filename, const data_set_t *ds)
170 if (check_create_dir (filename))
173 csv = fopen (filename, "w");
177 ERROR ("csv plugin: fopen (%s) failed: %s",
179 sstrerror (errno, errbuf, sizeof (errbuf)));
183 fprintf (csv, "epoch");
184 for (i = 0; i < ds->ds_num; i++)
185 fprintf (csv, ",%s", ds->ds[i].name);
191 } /* int csv_create_file */
193 static int csv_config (const char *key, const char *value)
195 if (strcasecmp ("DataDir", key) == 0)
199 datadir = strdup (value);
202 int len = strlen (datadir);
203 while ((len > 0) && (datadir[len - 1] == '/'))
215 else if (strcasecmp ("StoreRates", key) == 0)
217 if ((strcasecmp ("True", value) == 0)
218 || (strcasecmp ("Yes", value) == 0)
219 || (strcasecmp ("On", value) == 0))
233 } /* int csv_config */
235 static int csv_write (const data_set_t *ds, const value_list_t *vl)
245 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
248 DEBUG ("csv plugin: csv_write: filename = %s;", filename);
250 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
253 if (stat (filename, &statbuf) == -1)
257 if (csv_create_file (filename, ds))
263 ERROR ("stat(%s) failed: %s", filename,
264 sstrerror (errno, errbuf,
269 else if (!S_ISREG (statbuf.st_mode))
271 ERROR ("stat(%s): Not a regular file!",
276 csv = fopen (filename, "a");
280 ERROR ("csv plugin: fopen (%s) failed: %s", filename,
281 sstrerror (errno, errbuf, sizeof (errbuf)));
284 csv_fd = fileno (csv);
286 memset (&fl, '\0', sizeof (fl));
288 fl.l_len = 0; /* till end of file */
289 fl.l_pid = getpid ();
291 fl.l_whence = SEEK_SET;
293 status = fcntl (csv_fd, F_SETLK, &fl);
297 ERROR ("csv plugin: flock (%s) failed: %s", filename,
298 sstrerror (errno, errbuf, sizeof (errbuf)));
303 fprintf (csv, "%s\n", values);
305 /* The lock is implicitely released. I we don't release it explicitely
306 * because the `FILE *' may need to flush a cache first */
310 } /* int csv_write */
312 void module_register (void)
314 plugin_register_config ("csv", csv_config,
315 config_keys, config_keys_num);
316 plugin_register_write ("csv", csv_write);
317 } /* void module_register */