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 "configfile.h"
27 #include "utils_ignorelist.h"
30 # error "This module is for Linux only."
33 static const char *config_keys[] = {
39 static const char *const dirname_sysfs = "/sys/class/thermal";
40 static const char *const dirname_procfs = "/proc/acpi/thermal_zone";
42 static _Bool force_procfs = 0;
43 static ignorelist_t *device_list;
50 static void thermal_submit (const char *plugin_instance, enum dev_type dt,
53 value_list_t vl = VALUE_LIST_INIT;
61 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
62 sstrncpy (vl.plugin, "thermal", sizeof(vl.plugin));
63 if (plugin_instance != NULL)
64 sstrncpy (vl.plugin_instance, plugin_instance,
65 sizeof (vl.plugin_instance));
67 (dt == TEMP) ? "temperature" : "gauge",
70 plugin_dispatch_values (&vl);
73 static int thermal_sysfs_device_read (const char __attribute__((unused)) *dir,
74 const char *name, void __attribute__((unused)) *user_data)
81 if (device_list && ignorelist_match (device_list, name))
84 len = ssnprintf (filename, sizeof (filename),
85 "%s/%s/temp", dirname_sysfs, name);
86 if ((len < 0) || ((size_t) len >= sizeof (filename)))
89 len = (ssize_t) read_file_contents (filename, data, sizeof(data));
90 if (len > 1 && data[--len] == '\n') {
96 temp = strtod (data, &endptr) / 1000.0;
98 if (endptr == data + len && errno == 0) {
99 thermal_submit(name, TEMP, temp);
104 len = ssnprintf (filename, sizeof (filename),
105 "%s/%s/cur_state", dirname_sysfs, name);
106 if ((len < 0) || ((size_t) len >= sizeof (filename)))
109 len = (ssize_t) read_file_contents (filename, data, sizeof(data));
110 if (len > 1 && data[--len] == '\n') {
116 state = strtod (data, &endptr);
118 if (endptr == data + len && errno == 0) {
119 thermal_submit(name, COOLING_DEV, state);
124 return (success ? 0 : -1);
127 static int thermal_procfs_device_read (const char __attribute__((unused)) *dir,
128 const char *name, void __attribute__((unused)) *user_data)
130 const char str_temp[] = "temperature:";
135 if (device_list && ignorelist_match (device_list, name))
139 * rechot ~ # cat /proc/acpi/thermal_zone/THRM/temperature
143 len = ssnprintf (filename, sizeof (filename),
144 "%s/%s/temperature", dirname_procfs, name);
145 if ((len < 0) || ((size_t) len >= sizeof (filename)))
148 len = (ssize_t) read_file_contents (filename, data, sizeof(data));
149 if ((len > 0) && ((size_t) len > sizeof(str_temp))
150 && (data[--len] == '\n')
151 && (! strncmp(data, str_temp, sizeof(str_temp)-1))) {
156 if (data[--len] == 'C') {
159 } else if (data[len] == 'F') {
162 } else if (data[len] == 'K') {
168 while (len > 0 && data[--len] == ' ')
172 while (len > 0 && data[--len] != ' ')
177 temp = (strtod (data + len, &endptr) + add) * factor;
179 if (endptr != data + len && errno == 0) {
180 thermal_submit(name, TEMP, temp);
188 static int thermal_config (const char *key, const char *value)
190 if (device_list == NULL)
191 device_list = ignorelist_create (1);
193 if (strcasecmp (key, "Device") == 0)
195 if (ignorelist_add (device_list, value))
197 ERROR ("thermal plugin: "
198 "Cannot add value to ignorelist.");
202 else if (strcasecmp (key, "IgnoreSelected") == 0)
204 ignorelist_set_invert (device_list, 1);
206 ignorelist_set_invert (device_list, 0);
208 else if (strcasecmp (key, "ForceUseProcfs") == 0)
222 static int thermal_sysfs_read (void)
224 return walk_directory (dirname_sysfs, thermal_sysfs_device_read,
225 /* user_data = */ NULL, /* include hidden */ 0);
228 static int thermal_procfs_read (void)
230 return walk_directory (dirname_procfs, thermal_procfs_device_read,
231 /* user_data = */ NULL, /* include hidden */ 0);
234 static int thermal_init (void)
238 if (!force_procfs && access (dirname_sysfs, R_OK | X_OK) == 0) {
239 ret = plugin_register_read ("thermal", thermal_sysfs_read);
240 } else if (access (dirname_procfs, R_OK | X_OK) == 0) {
241 ret = plugin_register_read ("thermal", thermal_procfs_read);
247 static int thermal_shutdown (void)
249 ignorelist_free (device_list);
254 void module_register (void)
256 plugin_register_config ("thermal", thermal_config,
257 config_keys, STATIC_ARRAY_SIZE(config_keys));
258 plugin_register_init ("thermal", thermal_init);
259 plugin_register_shutdown ("thermal", thermal_shutdown);