2 * collectd - src/thermal.c
3 * Copyright (C) 2008 Michał Mirosław
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 * Michał Mirosław <mirq-linux at rere.qmqm.pl>
25 #include "configfile.h"
26 #include "utils_ignorelist.h"
29 # error "This module is for Linux only."
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;
45 static void thermal_submit (const char *plugin_instance, enum dev_type dt,
48 value_list_t vl = (dt == TEMP) ? vl_temp_template : vl_state_template;
54 sstrncpy (vl.plugin, "thermal", sizeof(vl.plugin));
55 sstrncpy (vl.plugin_instance, plugin_instance,
56 sizeof(vl.plugin_instance));
57 sstrncpy (vl.type, (dt == TEMP) ? "temperature" : "gauge",
60 plugin_dispatch_values (&vl);
63 static int thermal_sysfs_device_read (const char __attribute__((unused)) *dir,
64 const char *name, void __attribute__((unused)) *user_data)
71 if (device_list && ignorelist_match (device_list, name))
74 len = snprintf (filename, sizeof (filename),
75 "%s/%s/temp", dirname_sysfs, name);
76 if ((len < 0) || ((size_t) len >= sizeof (filename)))
79 len = read_file_contents (filename, data, sizeof(data));
80 if (len > 1 && data[--len] == '\n') {
86 temp = strtod (data, &endptr) / 1000.0;
88 if (endptr == data + len && errno == 0) {
89 thermal_submit(name, TEMP, temp);
94 len = snprintf (filename, sizeof (filename),
95 "%s/%s/cur_state", dirname_sysfs, name);
96 if ((len < 0) || ((size_t) len >= sizeof (filename)))
99 len = read_file_contents (filename, data, sizeof(data));
100 if (len > 1 && data[--len] == '\n') {
106 state = strtod (data, &endptr);
108 if (endptr == data + len && errno == 0) {
109 thermal_submit(name, COOLING_DEV, state);
117 static int thermal_procfs_device_read (const char __attribute__((unused)) *dir,
118 const char *name, void __attribute__((unused)) *user_data)
120 const char str_temp[] = "temperature:";
125 if (device_list && ignorelist_match (device_list, name))
129 * rechot ~ # cat /proc/acpi/thermal_zone/THRM/temperature
133 len = snprintf (filename, sizeof (filename),
134 "%s/%s/temperature", dirname_procfs, name);
135 if ((len < 0) || ((size_t) len >= sizeof (filename)))
138 len = read_file_contents (filename, data, sizeof(data));
139 if ((len > 0) && ((size_t) len > sizeof(str_temp))
140 && (data[--len] == '\n')
141 && (! strncmp(data, str_temp, sizeof(str_temp)-1))) {
146 if (data[--len] == 'C') {
149 } else if (data[len] == 'F') {
152 } else if (data[len] == 'K') {
158 while (len > 0 && data[--len] == ' ')
162 while (len > 0 && data[--len] != ' ')
167 temp = (strtod (data + len, &endptr) + add) * celsius;
169 if (endptr != data + len && errno == 0) {
170 thermal_submit(name, TEMP, temp);
178 static const char *config_keys[] = {
184 static int thermal_config (const char *key, const char *value)
186 if (device_list == NULL)
187 device_list = ignorelist_create (1);
189 if (strcasecmp (key, "Device") == 0)
191 if (ignorelist_add (device_list, value))
193 ERROR ("thermal plugin: "
194 "Cannot add value to ignorelist.");
198 else if (strcasecmp (key, "IgnoreSelected") == 0)
200 ignorelist_set_invert (device_list, 1);
202 ignorelist_set_invert (device_list, 0);
204 else if (strcasecmp (key, "ForceUseProcfs") == 0)
218 static int thermal_sysfs_read (void)
220 return walk_directory (dirname_sysfs, thermal_sysfs_device_read,
221 /* user_data = */ NULL);
224 static int thermal_procfs_read (void)
226 return walk_directory (dirname_procfs, thermal_procfs_device_read,
227 /* user_data = */ NULL);
230 static int thermal_init (void)
234 if (!force_procfs && access (dirname_sysfs, R_OK | X_OK) == 0) {
235 ret = plugin_register_read ("thermal", thermal_sysfs_read);
236 } else if (access (dirname_procfs, R_OK | X_OK) == 0) {
237 ret = plugin_register_read ("thermal", thermal_procfs_read);
241 vl_temp_template.values_len = 1;
242 vl_temp_template.interval = interval_g;
243 sstrncpy (vl_temp_template.host, hostname_g,
244 sizeof(vl_temp_template.host));
245 sstrncpy (vl_temp_template.plugin, "thermal",
246 sizeof(vl_temp_template.plugin));
247 sstrncpy (vl_temp_template.type_instance, "temperature",
248 sizeof(vl_temp_template.type_instance));
250 vl_state_template = vl_temp_template;
251 sstrncpy (vl_state_template.type_instance, "cooling_state",
252 sizeof(vl_state_template.type_instance));
258 static int thermal_shutdown (void)
260 ignorelist_free (device_list);
265 void module_register (void)
267 plugin_register_config ("thermal", thermal_config,
268 config_keys, STATIC_ARRAY_SIZE(config_keys));
269 plugin_register_init ("thermal", thermal_init);
270 plugin_register_shutdown ("thermal", thermal_shutdown);