1 /**
2 * collectd - src/owfs.c
3 * Copyright (C) 2008 Florian octo Forster
4 *
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.
8 *
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.
13 *
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
17 *
18 * Authors:
19 * Florian octo Forster <octo at noris.net>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "utils_ignorelist.h"
27 #include <owcapi.h>
29 #define OW_FAMILY_LENGTH 8
30 #define OW_FAMILY_MAX_FEATURES 2
31 struct ow_family_features_s
32 {
33 char family[OW_FAMILY_LENGTH];
34 struct
35 {
36 char filename[DATA_MAX_NAME_LEN];
37 char type[DATA_MAX_NAME_LEN];
38 char type_instance[DATA_MAX_NAME_LEN];
39 } features[OW_FAMILY_MAX_FEATURES];
40 size_t features_num;
41 };
42 typedef struct ow_family_features_s ow_family_features_t;
44 /* see http://owfs.sourceforge.net/ow_table.html for a list of families */
45 static ow_family_features_t ow_family_features[] =
46 {
47 {
48 /* family = */ "10.",
49 {
50 {
51 /* filename = */ "temperature",
52 /* type = */ "temperature",
53 /* type_instance = */ ""
54 }
55 },
56 /* features_num = */ 1
57 }
58 };
59 static int ow_family_features_num = STATIC_ARRAY_SIZE (ow_family_features);
61 static char *device_g = NULL;
63 static const char *config_keys[] =
64 {
65 "Device",
66 "IgnoreSelected",
67 "Sensor",
68 };
69 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
71 static ignorelist_t *sensor_list;
73 static int cow_load_config (const char *key, const char *value)
74 {
75 if (sensor_list == NULL)
76 sensor_list = ignorelist_create (1);
78 if (strcasecmp (key, "Sensor") == 0)
79 {
80 if (ignorelist_add (sensor_list, value))
81 {
82 ERROR ("sensors plugin: "
83 "Cannot add value to ignorelist.");
84 return (1);
85 }
86 }
87 else if (strcasecmp (key, "IgnoreSelected") == 0)
88 {
89 ignorelist_set_invert (sensor_list, 1);
90 if ((strcasecmp (value, "True") == 0)
91 || (strcasecmp (value, "Yes") == 0)
92 || (strcasecmp (value, "On") == 0))
93 ignorelist_set_invert (sensor_list, 0);
94 }
95 else if (strcasecmp (key, "Device") == 0)
96 {
97 char *temp;
98 temp = strdup (value);
99 if (temp == NULL)
100 {
101 ERROR ("onewire plugin: strdup failed.");
102 return (1);
103 }
104 sfree (device_g);
105 device_g = temp;
106 }
107 else
108 {
109 return (-1);
110 }
112 return (0);
113 }
115 static int cow_init (void)
116 {
117 int status;
119 if (device_g == NULL)
120 {
121 ERROR ("onewire plugin: cow_init: No device configured.");
122 return (-1);
123 }
125 status = (int) OW_init (device_g);
126 if (status != 0)
127 {
128 ERROR ("onewire plugin: OW_init(%s) failed: %i.", device_g, status);
129 return (1);
130 }
132 return (0);
133 } /* int cow_init */
135 static int cow_read_values (const char *path, const char *name,
136 const ow_family_features_t *family_info)
137 {
138 value_t values[1];
139 value_list_t vl = VALUE_LIST_INIT;
140 int success = 0;
141 size_t i;
143 if (sensor_list != NULL)
144 {
145 DEBUG ("onewire plugin: Checking ignorelist for `%s'", name);
146 if (ignorelist_match (sensor_list, name) != 0)
147 return 0;
148 }
150 vl.values = values;
151 vl.values_len = 1;
153 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
154 sstrncpy (vl.plugin, "onewire", sizeof (vl.plugin));
155 sstrncpy (vl.plugin_instance, name, sizeof (vl.plugin_instance));
157 for (i = 0; i < family_info->features_num; i++)
158 {
159 char *buffer;
160 size_t buffer_size;
161 int status;
163 char file[4096];
164 char *endptr;
166 snprintf (file, sizeof (file), "%s/%s",
167 path, family_info->features[i].filename);
168 file[sizeof (file) - 1] = 0;
170 buffer = NULL;
171 buffer_size = 0;
172 status = OW_get (file, &buffer, &buffer_size);
173 if (status < 0)
174 {
175 ERROR ("onewire plugin: OW_get (%s/%s) failed. status = %#x;",
176 path, family_info->features[i].filename, status);
177 return (-1);
178 }
180 endptr = NULL;
181 values[0].gauge = strtod (buffer, &endptr);
182 if (endptr == NULL)
183 {
184 ERROR ("onewire plugin: Buffer is not a number: %s", buffer);
185 status = -1;
186 continue;
187 }
189 sstrncpy (vl.type, family_info->features[i].type, sizeof (vl.type));
190 sstrncpy (vl.type_instance, family_info->features[i].type_instance,
191 sizeof (vl.type_instance));
193 plugin_dispatch_values (&vl);
194 success++;
196 free (buffer);
197 } /* for (i = 0; i < features_num; i++) */
199 return ((success > 0) ? 0 : -1);
200 } /* int cow_read_values */
202 /* Forward declaration so the recursion below works */
203 static int cow_read_bus (const char *path);
205 /*
206 * cow_read_ds2409
207 *
208 * Handles:
209 * - DS2409 - MicroLAN Coupler
210 */
211 static int cow_read_ds2409 (const char *path)
212 {
213 char subpath[4096];
214 int status;
216 status = ssnprintf (subpath, sizeof (subpath), "%s/main", path);
217 if ((status > 0) && (status < sizeof (subpath)))
218 cow_read_bus (subpath);
220 status = ssnprintf (subpath, sizeof (subpath), "%s/aux", path);
221 if ((status > 0) && (status < sizeof (subpath)))
222 cow_read_bus (subpath);
224 return (0);
225 } /* int cow_read_ds2409 */
227 static int cow_read_bus (const char *path)
228 {
229 char *buffer;
230 size_t buffer_size;
231 int status;
233 char *buffer_ptr;
234 char *dummy;
235 char *saveptr;
236 char subpath[4096];
238 status = OW_get (path, &buffer, &buffer_size);
239 if (status < 0)
240 {
241 ERROR ("onewire plugin: OW_get (%s) failed. status = %#x;",
242 path, status);
243 return (-1);
244 }
245 DEBUG ("onewire plugin: OW_get (%s) returned: %s",
246 path, buffer);
248 dummy = buffer;
249 saveptr = NULL;
250 while ((buffer_ptr = strtok_r (dummy, ",/", &saveptr)) != NULL)
251 {
252 int i;
254 dummy = NULL;
256 if (strcmp ("/", path) == 0)
257 status = ssnprintf (subpath, sizeof (subpath), "/%s", buffer_ptr);
258 else
259 status = ssnprintf (subpath, sizeof (subpath), "%s/%s",
260 path, buffer_ptr);
261 if ((status <= 0) || (status >= sizeof (subpath)))
262 continue;
264 for (i = 0; i < ow_family_features_num; i++)
265 {
266 if (strncmp (ow_family_features[i].family, buffer_ptr,
267 strlen (ow_family_features[i].family)) != 0)
268 continue;
270 cow_read_values (subpath,
271 buffer_ptr + strlen (ow_family_features[i].family),
272 ow_family_features + i);
273 break;
274 }
275 if (i < ow_family_features_num)
276 continue;
278 /* DS2409 */
279 if (strncmp ("1F.", buffer_ptr, strlen ("1F.")) == 0)
280 {
281 cow_read_ds2409 (subpath);
282 continue;
283 }
284 } /* while (strtok_r) */
286 free (buffer);
287 return (0);
288 } /* int cow_read_bus */
290 static int cow_read (void)
291 {
292 return (cow_read_bus ("/"));
293 } /* int cow_read */
295 static int cow_shutdown (void)
296 {
297 OW_finish ();
298 ignorelist_free (sensor_list);
299 return (0);
300 } /* int cow_shutdown */
302 void module_register (void)
303 {
304 plugin_register_init ("onewire", cow_init);
305 plugin_register_read ("onewire", cow_read);
306 plugin_register_shutdown ("onewire", cow_shutdown);
307 plugin_register_config ("onewire", cow_load_config,
308 config_keys, config_keys_num);
309 }
311 /* vim: set sw=2 sts=2 ts=8 et fdm=marker cindent : */