2 * collectd - src/onewire.c
3 * Copyright (C) 2008 noris network AG
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 noris.net>
25 #include "utils_ignorelist.h"
28 #include <sys/types.h>
32 #define OW_FAMILY_LENGTH 8
33 #define OW_FAMILY_MAX_FEATURES 2
34 struct ow_family_features_s
36 char family[OW_FAMILY_LENGTH];
39 char filename[DATA_MAX_NAME_LEN];
40 char type[DATA_MAX_NAME_LEN];
41 char type_instance[DATA_MAX_NAME_LEN];
42 } features[OW_FAMILY_MAX_FEATURES];
45 typedef struct ow_family_features_s ow_family_features_t;
47 /* internal timing info collected in debug version only */
49 static struct timeval tv_begin, tv_end, tv_diff;
50 #endif /* COLLECT_DEBUG */
52 /* regexp to extract address (without family) and file from the owfs path */
53 static const char *regexp_to_match = "[A-Fa-f0-9]{2}\\.([A-Fa-f0-9]{12})/([[:alnum:]]+)$";
55 /* see http://owfs.sourceforge.net/ow_table.html for a list of families */
56 static ow_family_features_t ow_family_features[] =
58 { /* DS18S20 Precision Thermometer and DS1920 ibutton */
62 /* filename = */ "temperature",
63 /* type = */ "temperature",
64 /* type_instance = */ ""
67 /* features_num = */ 1
69 { /* DS1822 Econo Thermometer */
73 /* filename = */ "temperature",
74 /* type = */ "temperature",
75 /* type_instance = */ ""
78 /* features_num = */ 1
80 { /* DS18B20 Programmable Resolution Thermometer */
84 /* filename = */ "temperature",
85 /* type = */ "temperature",
86 /* type_instance = */ ""
89 /* features_num = */ 1
91 { /* DS2436 Volts/Temp */
95 /* filename = */ "temperature",
96 /* type = */ "temperature",
97 /* type_instance = */ ""
100 /* features_num = */ 1
102 { /* DS2438 Volts/Temp */
103 /* family = */ "26.",
106 /* filename = */ "temperature",
107 /* type = */ "temperature",
108 /* type_instance = */ ""
111 /* features_num = */ 1
114 static int ow_family_features_num = STATIC_ARRAY_SIZE (ow_family_features);
116 static char *device_g = NULL;
117 static cdtime_t ow_interval = 0;
118 static _Bool direct_access = 0;
120 static const char *config_keys[] =
127 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
129 static ignorelist_t *sensor_list;
131 static _Bool regex_direct_initialized = 0;
132 static regex_t regex_direct;
135 * List of onewire owfs "files" to be directly read
137 typedef struct direct_access_element_s
139 char *path; /**< The whole owfs path */
140 char *address; /**< 1-wire address without family */
141 char *file; /**< owfs file - e.g. temperature */
142 struct direct_access_element_s *next; /**< Next in the list */
143 } direct_access_element_t;
145 static direct_access_element_t * direct_list = NULL;
147 /* =================================================================================== */
150 /* Return 1 if the difference is negative, otherwise 0. */
151 static int timeval_subtract(struct timeval *result, struct timeval *t2, struct timeval *t1)
153 long int diff = (t2->tv_usec + 1000000 * t2->tv_sec) - (t1->tv_usec + 1000000 * t1->tv_sec);
154 result->tv_sec = diff / 1000000;
155 result->tv_usec = diff % 1000000;
159 #endif /* COLLECT_DEBUG */
161 /* =================================================================================== */
163 static void direct_list_element_free(direct_access_element_t *el)
167 DEBUG ("onewire plugin: direct_list_element_free - deleting <%s>", el->path);
175 static int direct_list_insert(const char * config)
177 regmatch_t pmatch[3];
179 direct_access_element_t *element;
181 DEBUG ("onewire plugin: direct_list_insert <%s>", config);
183 element = malloc (sizeof (*element));
186 ERROR ("onewire plugin: direct_list_insert - cannot allocate element");
189 element->path = NULL;
190 element->address = NULL;
191 element->file = NULL;
193 element->path = strdup (config);
194 if (element->path == NULL)
196 ERROR ("onewire plugin: direct_list_insert - cannot allocate path");
197 direct_list_element_free (element);
201 DEBUG ("onewire plugin: direct_list_insert - about to match %s", config);
203 if (!regex_direct_initialized)
205 if (regcomp (®ex_direct, regexp_to_match, REG_EXTENDED))
207 ERROR ("onewire plugin: Cannot compile regex");
208 direct_list_element_free (element);
211 regex_direct_initialized = 1;
212 DEBUG ("onewire plugin: Compiled regex!!");
215 if (regexec (®ex_direct, config, nmatch, pmatch, 0))
217 ERROR ("onewire plugin: direct_list_insert - no regex match");
218 direct_list_element_free (element);
222 if (pmatch[1].rm_so<0)
224 ERROR ("onewire plugin: direct_list_insert - no address regex match");
225 direct_list_element_free (element);
228 element->address = strndup (config+pmatch[1].rm_so,
229 pmatch[1].rm_eo - pmatch[1].rm_so);
230 if (element->address == NULL)
232 ERROR ("onewire plugin: direct_list_insert - cannot allocate address");
233 direct_list_element_free (element);
236 DEBUG ("onewire plugin: direct_list_insert - found address <%s>",
239 if (pmatch[2].rm_so<0)
241 ERROR ("onewire plugin: direct_list_insert - no file regex match");
242 direct_list_element_free (element);
245 element->file = strndup (config+pmatch[2].rm_so,
246 pmatch[2].rm_eo - pmatch[2].rm_so);
247 if (element->file == NULL)
249 ERROR ("onewire plugin: direct_list_insert - cannot allocate file");
250 direct_list_element_free (element);
253 DEBUG ("onewire plugin: direct_list_insert - found file <%s>", element->file);
255 element->next = direct_list;
256 direct_list = element;
261 static void direct_list_free(void)
263 direct_access_element_t *traverse = direct_list;
264 direct_access_element_t *tmp = NULL;;
266 while(traverse != NULL)
269 traverse = traverse->next;
270 direct_list_element_free (tmp);
275 /* =================================================================================== */
277 static int cow_load_config (const char *key, const char *value)
279 if (sensor_list == NULL)
280 sensor_list = ignorelist_create (1);
282 if (strcasecmp (key, "Sensor") == 0)
284 if (direct_list_insert (value))
286 DEBUG ("onewire plugin: Cannot add %s to direct_list_insert.", value);
288 if (ignorelist_add (sensor_list, value))
290 ERROR ("onewire plugin: Cannot add value to ignorelist.");
296 DEBUG ("onewire plugin: %s is a direct access", value);
300 else if (strcasecmp (key, "IgnoreSelected") == 0)
302 ignorelist_set_invert (sensor_list, 1);
304 ignorelist_set_invert (sensor_list, 0);
306 else if (strcasecmp (key, "Device") == 0)
309 temp = strdup (value);
312 ERROR ("onewire plugin: strdup failed.");
318 else if (strcasecmp ("Interval", key) == 0)
323 ow_interval = DOUBLE_TO_CDTIME_T (tmp);
325 ERROR ("onewire plugin: Invalid `Interval' setting: %s", value);
335 static int cow_read_values (const char *path, const char *name,
336 const ow_family_features_t *family_info)
339 value_list_t vl = VALUE_LIST_INIT;
343 if (sensor_list != NULL)
345 DEBUG ("onewire plugin: Checking ignorelist for `%s'", name);
346 if (ignorelist_match (sensor_list, name) != 0)
353 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
354 sstrncpy (vl.plugin, "onewire", sizeof (vl.plugin));
355 sstrncpy (vl.plugin_instance, name, sizeof (vl.plugin_instance));
357 for (i = 0; i < family_info->features_num; i++)
366 snprintf (file, sizeof (file), "%s/%s",
367 path, family_info->features[i].filename);
368 file[sizeof (file) - 1] = 0;
372 DEBUG ("Start reading onewire device %s", file);
373 status = OW_get (file, &buffer, &buffer_size);
376 ERROR ("onewire plugin: OW_get (%s/%s) failed. status = %#x;",
377 path, family_info->features[i].filename, status);
380 DEBUG ("Read onewire device %s as %s", file, buffer);
383 values[0].gauge = strtod (buffer, &endptr);
386 ERROR ("onewire plugin: Buffer is not a number: %s", buffer);
390 sstrncpy (vl.type, family_info->features[i].type, sizeof (vl.type));
391 sstrncpy (vl.type_instance, family_info->features[i].type_instance,
392 sizeof (vl.type_instance));
394 plugin_dispatch_values (&vl);
398 } /* for (i = 0; i < features_num; i++) */
400 return ((success > 0) ? 0 : -1);
401 } /* int cow_read_values */
403 /* Forward declaration so the recursion below works */
404 static int cow_read_bus (const char *path);
410 * - DS2409 - MicroLAN Coupler
412 static int cow_read_ds2409 (const char *path)
417 status = ssnprintf (subpath, sizeof (subpath), "%s/main", path);
418 if ((status > 0) && (status < (int) sizeof (subpath)))
419 cow_read_bus (subpath);
421 status = ssnprintf (subpath, sizeof (subpath), "%s/aux", path);
422 if ((status > 0) && (status < (int) sizeof (subpath)))
423 cow_read_bus (subpath);
426 } /* int cow_read_ds2409 */
428 static int cow_read_bus (const char *path)
439 status = OW_get (path, &buffer, &buffer_size);
442 ERROR ("onewire plugin: OW_get (%s) failed. status = %#x;",
446 DEBUG ("onewire plugin: OW_get (%s) returned: %s",
451 while ((buffer_ptr = strtok_r (dummy, ",/", &saveptr)) != NULL)
457 if (strcmp ("/", path) == 0)
458 status = ssnprintf (subpath, sizeof (subpath), "/%s", buffer_ptr);
460 status = ssnprintf (subpath, sizeof (subpath), "%s/%s",
462 if ((status <= 0) || (status >= (int) sizeof (subpath)))
465 for (i = 0; i < ow_family_features_num; i++)
467 if (strncmp (ow_family_features[i].family, buffer_ptr,
468 strlen (ow_family_features[i].family)) != 0)
471 cow_read_values (subpath,
472 buffer_ptr + strlen (ow_family_features[i].family),
473 ow_family_features + i);
476 if (i < ow_family_features_num)
480 if (strncmp ("1F.", buffer_ptr, strlen ("1F.")) == 0)
482 cow_read_ds2409 (subpath);
485 } /* while (strtok_r) */
489 } /* int cow_read_bus */
492 /* =================================================================================== */
494 static int cow_simple_read (void)
497 value_list_t vl = VALUE_LIST_INIT;
502 direct_access_element_t *traverse;
504 /* traverse list and check entries */
505 for (traverse = direct_list; traverse != NULL; traverse = traverse->next)
510 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
511 sstrncpy (vl.plugin, "onewire", sizeof (vl.plugin));
512 sstrncpy (vl.plugin_instance, traverse->address, sizeof (vl.plugin_instance));
514 status = OW_get (traverse->path, &buffer, &buffer_size);
517 ERROR ("onewire plugin: OW_get (%s) failed. status = %#x;",
522 DEBUG ("onewire plugin: Read onewire device %s as %s", traverse->path, buffer);
526 values[0].gauge = strtod (buffer, &endptr);
529 ERROR ("onewire plugin: Buffer is not a number: %s", buffer);
533 sstrncpy (vl.type, traverse->file, sizeof (vl.type));
534 sstrncpy (vl.type_instance, "", sizeof (""));
536 plugin_dispatch_values (&vl);
538 } /* for (traverse) */
541 } /* int cow_simple_read */
543 /* =================================================================================== */
545 static int cow_read (user_data_t *ud __attribute__((unused)))
550 gettimeofday (&tv_begin, NULL);
551 #endif /* COLLECT_DEBUG */
555 DEBUG ("onewire plugin: Direct access read");
556 result = cow_simple_read ();
560 DEBUG ("onewire plugin: Standard access read");
561 result = cow_read_bus ("/");
565 gettimeofday (&tv_end, NULL);
566 timeval_subtract (&tv_diff, &tv_end, &tv_begin);
567 DEBUG ("onewire plugin: Onewire read took us %ld.%06ld s",
570 #endif /* COLLECT_DEBUG */
575 static int cow_shutdown (void)
578 ignorelist_free (sensor_list);
582 if (regex_direct_initialized)
584 regfree(®ex_direct);
588 } /* int cow_shutdown */
590 static int cow_init (void)
594 if (device_g == NULL)
596 ERROR ("onewire plugin: cow_init: No device configured.");
600 DEBUG ("onewire plugin: about to init device <%s>.", device_g);
601 status = (int) OW_init (device_g);
604 ERROR ("onewire plugin: OW_init(%s) failed: %i.", device_g, status);
608 plugin_register_complex_read (/* group = */ NULL, "onewire", cow_read,
609 ow_interval, /* user data = */ NULL);
610 plugin_register_shutdown ("onewire", cow_shutdown);
615 void module_register (void)
617 plugin_register_init ("onewire", cow_init);
618 plugin_register_config ("onewire", cow_load_config,
619 config_keys, config_keys_num);
622 /* vim: set sw=2 sts=2 ts=8 et fdm=marker cindent : */