1 /**
2 * collectd - src/thermal.c
3 * Copyright (C) 2008 Michał Mirosław
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 * Michał Mirosław <mirq-linux at rere.qmqm.pl>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "configfile.h"
26 #include "utils_ignorelist.h"
28 #if !KERNEL_LINUX
29 # error "This module is for Linux only."
30 #endif
32 const char *const dirname_sysfs = "/sys/class/thermal";
33 const char *const dirname_procfs = "/proc/acpi/thermal_zone";
35 static char force_procfs = 0;
36 static ignorelist_t *device_list;
37 static value_list_t vl_temp_template = VALUE_LIST_STATIC;
38 static value_list_t vl_state_template = VALUE_LIST_STATIC;
40 enum dev_type {
41 TEMP = 0,
42 COOLING_DEV
43 };
45 static void thermal_submit (const char *plugin_instance, enum dev_type dt,
46 gauge_t value)
47 {
48 value_list_t vl = (dt == TEMP) ? vl_temp_template : vl_state_template;
49 value_t vt;
51 vt.gauge = value;
53 vl.values = &vt;
54 vl.time = time (NULL);
55 sstrncpy (vl.plugin, "thermal", sizeof(vl.plugin));
56 sstrncpy (vl.plugin_instance, plugin_instance,
57 sizeof(vl.plugin_instance));
58 sstrncpy (vl.type, (dt == TEMP) ? "temperature" : "gauge",
59 sizeof (vl.type));
61 plugin_dispatch_values (&vl);
62 }
64 static int thermal_sysfs_device_read (const char *name)
65 {
66 char filename[256];
67 char data[1024];
68 int len;
69 int ok = 0;
71 if (device_list && ignorelist_match (device_list, name))
72 return -1;
74 len = snprintf (filename, sizeof (filename), "%s/%s/temp", dirname_sysfs, name);
75 if ((len < 0) || ((unsigned int)len >= sizeof (filename)))
76 return -1;
78 len = read_file_contents (filename, data, sizeof(data));
79 if (len > 1 && data[--len] == '\n') {
80 char *endptr = NULL;
81 double temp;
83 data[len] = 0;
84 errno = 0;
85 temp = strtod (data, &endptr) / 1000.0;
87 if (endptr == data + len && errno == 0) {
88 thermal_submit(name, TEMP, temp);
89 ++ok;
90 }
91 }
93 len = snprintf (filename, sizeof (filename), "%s/%s/cur_state", dirname_sysfs, name);
94 if ((len < 0) || ((unsigned int)len >= sizeof (filename)))
95 return -1;
97 len = read_file_contents (filename, data, sizeof(data));
98 if (len > 1 && data[--len] == '\n') {
99 char *endptr = NULL;
100 double state;
102 data[len] = 0;
103 errno = 0;
104 state = strtod (data, &endptr);
106 if (endptr == data + len && errno == 0) {
107 thermal_submit(name, COOLING_DEV, state);
108 ++ok;
109 }
110 }
112 return ok ? 0 : -1;
113 }
115 static int thermal_procfs_device_read (const char *name)
116 {
117 const char str_temp[] = "temperature:";
118 char filename[256];
119 char data[1024];
120 int len;
122 if (device_list && ignorelist_match (device_list, name))
123 return -1;
125 /**
126 * rechot ~ # cat /proc/acpi/thermal_zone/THRM/temperature
127 * temperature: 55 C
128 */
130 len = snprintf (filename, sizeof (filename), "%s/%s/temperature", dirname_procfs, name);
131 if ((len < 0) || ((unsigned int)len >= sizeof (filename)))
132 return -1;
134 len = read_file_contents (filename, data, sizeof(data));
135 if (len > sizeof(str_temp) && data[--len] == '\n' && !strncmp(data, str_temp, sizeof(str_temp)-1)) {
136 char *endptr = NULL;
137 double temp;
138 double celsius, add;
140 if (data[--len] == 'C') {
141 add = 0;
142 celsius = 1;
143 } else if (data[len] == 'F') {
144 add = -32;
145 celsius = 5/9;
146 } else if (data[len] == 'K') {
147 add = -273.15;
148 celsius = 1;
149 } else
150 return -1;
152 while (len > 0 && data[--len] == ' ')
153 ;
154 data[len + 1] = 0;
156 while (len > 0 && data[--len] != ' ')
157 ;
158 ++len;
160 errno = 0;
161 temp = (strtod (data + len, &endptr) + add) * celsius;
163 if (endptr != data + len && errno == 0) {
164 thermal_submit(name, TEMP, temp);
165 return 0;
166 }
167 }
169 return -1;
170 }
172 static const char *config_keys[] = {
173 "Device",
174 "IgnoreSelected",
175 "ForceUseProcfs"
176 };
178 static int thermal_config (const char *key, const char *value)
179 {
180 if (device_list == NULL)
181 device_list = ignorelist_create (1);
183 if (strcasecmp (key, "Device") == 0)
184 {
185 if (ignorelist_add (device_list, value))
186 {
187 ERROR ("thermal plugin: "
188 "Cannot add value to ignorelist.");
189 return 1;
190 }
191 }
192 else if (strcasecmp (key, "IgnoreSelected") == 0)
193 {
194 ignorelist_set_invert (device_list, 1);
195 if ((strcasecmp (value, "True") == 0)
196 || (strcasecmp (value, "Yes") == 0)
197 || (strcasecmp (value, "On") == 0))
198 ignorelist_set_invert (device_list, 0);
199 }
200 else if (strcasecmp (key, "ForceUseProcfs") == 0)
201 {
202 force_procfs = 0;
203 if ((strcasecmp (value, "True") == 0)
204 || (strcasecmp (value, "Yes") == 0)
205 || (strcasecmp (value, "On") == 0))
206 force_procfs = 1;
207 }
208 else
209 {
210 return -1;
211 }
213 return 0;
214 }
216 static int thermal_sysfs_read (void)
217 {
218 return walk_directory (dirname_sysfs, thermal_sysfs_device_read);
219 }
221 static int thermal_procfs_read (void)
222 {
223 return walk_directory (dirname_procfs, thermal_procfs_device_read);
224 }
226 static int thermal_init (void)
227 {
228 int ret = -1;
230 if (!force_procfs && access (dirname_sysfs, R_OK | X_OK) == 0) {
231 ret = plugin_register_read ("thermal", thermal_sysfs_read);
232 } else if (access (dirname_procfs, R_OK | X_OK) == 0) {
233 ret = plugin_register_read ("thermal", thermal_procfs_read);
234 }
236 if (!ret) {
237 vl_temp_template.values_len = 1;
238 vl_temp_template.interval = interval_g;
239 sstrncpy (vl_temp_template.host, hostname_g,
240 sizeof(vl_temp_template.host));
241 sstrncpy (vl_temp_template.plugin, "thermal",
242 sizeof(vl_temp_template.plugin));
243 sstrncpy (vl_temp_template.type_instance, "temperature",
244 sizeof(vl_temp_template.type_instance));
246 vl_state_template = vl_temp_template;
247 sstrncpy (vl_state_template.type_instance, "cooling_state",
248 sizeof(vl_state_template.type_instance));
249 }
251 return ret;
252 }
254 static int thermal_shutdown (void)
255 {
256 ignorelist_free (device_list);
258 return 0;
259 }
261 void module_register (void)
262 {
263 plugin_register_config ("thermal", thermal_config,
264 config_keys, STATIC_ARRAY_SIZE(config_keys));
265 plugin_register_init ("thermal", thermal_init);
266 plugin_register_shutdown ("thermal", thermal_shutdown);
267 }