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>
26 #include "utils_ignorelist.h"
29 #error "This module is for Linux only."
32 static const char *config_keys[] = {"Device", "IgnoreSelected",
35 static const char *const dirname_sysfs = "/sys/class/thermal";
36 static const char *const dirname_procfs = "/proc/acpi/thermal_zone";
38 static _Bool force_procfs = 0;
39 static ignorelist_t *device_list;
41 enum dev_type { TEMP = 0, COOLING_DEV };
43 static void thermal_submit(const char *plugin_instance, enum dev_type dt,
45 value_list_t vl = VALUE_LIST_INIT;
53 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
54 sstrncpy(vl.plugin, "thermal", sizeof(vl.plugin));
55 if (plugin_instance != NULL)
56 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
57 sstrncpy(vl.type, (dt == TEMP) ? "temperature" : "gauge", sizeof(vl.type));
59 plugin_dispatch_values(&vl);
62 static int thermal_sysfs_device_read(const char __attribute__((unused)) * dir,
64 void __attribute__((unused)) * user_data) {
70 if (device_list && ignorelist_match(device_list, name))
74 ssnprintf(filename, sizeof(filename), "%s/%s/temp", dirname_sysfs, name);
75 if ((len < 0) || ((size_t)len >= sizeof(filename)))
78 len = (ssize_t)read_file_contents(filename, data, sizeof(data));
79 if (len > 1 && data[--len] == '\n') {
85 temp = strtod(data, &endptr) / 1000.0;
87 if (endptr == data + len && errno == 0) {
88 thermal_submit(name, TEMP, temp);
93 len = ssnprintf(filename, sizeof(filename), "%s/%s/cur_state", dirname_sysfs,
95 if ((len < 0) || ((size_t)len >= sizeof(filename)))
98 len = (ssize_t)read_file_contents(filename, data, sizeof(data));
99 if (len > 1 && data[--len] == '\n') {
105 state = strtod(data, &endptr);
107 if (endptr == data + len && errno == 0) {
108 thermal_submit(name, COOLING_DEV, state);
113 return (success ? 0 : -1);
116 static int thermal_procfs_device_read(const char __attribute__((unused)) * dir,
118 void __attribute__((unused)) *
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 = ssnprintf(filename, sizeof(filename), "%s/%s/temperature",
134 dirname_procfs, name);
135 if ((len < 0) || ((size_t)len >= sizeof(filename)))
138 len = (ssize_t)read_file_contents(filename, data, sizeof(data));
139 if ((len > 0) && ((size_t)len > sizeof(str_temp)) && (data[--len] == '\n') &&
140 (!strncmp(data, str_temp, sizeof(str_temp) - 1))) {
145 if (data[--len] == 'C') {
148 } else if (data[len] == 'F') {
151 } else if (data[len] == 'K') {
157 while (len > 0 && data[--len] == ' ')
161 while (len > 0 && data[--len] != ' ')
166 temp = (strtod(data + len, &endptr) + add) * factor;
168 if (endptr != data + len && errno == 0) {
169 thermal_submit(name, TEMP, temp);
177 static int thermal_config(const char *key, const char *value) {
178 if (device_list == NULL)
179 device_list = ignorelist_create(1);
181 if (strcasecmp(key, "Device") == 0) {
182 if (ignorelist_add(device_list, value)) {
183 ERROR("thermal plugin: "
184 "Cannot add value to ignorelist.");
187 } else if (strcasecmp(key, "IgnoreSelected") == 0) {
188 ignorelist_set_invert(device_list, 1);
190 ignorelist_set_invert(device_list, 0);
191 } else if (strcasecmp(key, "ForceUseProcfs") == 0) {
202 static int thermal_sysfs_read(void) {
203 return walk_directory(dirname_sysfs, thermal_sysfs_device_read,
204 /* user_data = */ NULL, /* include hidden */ 0);
207 static int thermal_procfs_read(void) {
208 return walk_directory(dirname_procfs, thermal_procfs_device_read,
209 /* user_data = */ NULL, /* include hidden */ 0);
212 static int thermal_init(void) {
215 if (!force_procfs && access(dirname_sysfs, R_OK | X_OK) == 0) {
216 ret = plugin_register_read("thermal", thermal_sysfs_read);
217 } else if (access(dirname_procfs, R_OK | X_OK) == 0) {
218 ret = plugin_register_read("thermal", thermal_procfs_read);
224 static int thermal_shutdown(void) {
225 ignorelist_free(device_list);
230 void module_register(void) {
231 plugin_register_config("thermal", thermal_config, config_keys,
232 STATIC_ARRAY_SIZE(config_keys));
233 plugin_register_init("thermal", thermal_init);
234 plugin_register_shutdown("thermal", thermal_shutdown);