2 * collectd - src/statefs_battery.c
3 * Copyright (C) 2016 rinigus
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13 permit persons to whom the Software is furnished to do so, subject to
14 the following conditions:
16 The above copyright notice and this permission notice shall be included in all
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19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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28 * rinigus <http://github.com/rinigus>
30 Battery stats are collected from StateFS Battery namespace. Reported
39 timefull and timelow seconds
43 https://git.merproject.org/mer-core/statefs-providers/blob/master/src/power_udev/provider_power_udev.cpp
53 #define STATEFS_ROOT "/run/state/namespaces/Battery/"
55 static void battery_submit(const char *type, gauge_t value,
56 const char *type_instance) {
57 value_list_t vl = VALUE_LIST_INIT;
59 vl.values = &(value_t){.gauge = value};
61 sstrncpy(vl.plugin, "battery", sizeof(vl.plugin));
62 /* statefs supports 1 battery at present */
63 sstrncpy(vl.plugin_instance, "0", sizeof(vl.plugin_instance));
64 sstrncpy(vl.type, type, sizeof(vl.type));
65 if (type_instance != NULL)
66 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
67 plugin_dispatch_values(&vl);
70 /* cannot be static, is referred to from battery.c */
71 int battery_read_statefs(void) {
75 if (parse_value_file(STATEFS_ROOT "ChargePercentage", &v, DS_TYPE_GAUGE) ==
77 battery_submit("charge", v.gauge, NULL);
79 } else if (parse_value_file(STATEFS_ROOT "Capacity", &v, DS_TYPE_GAUGE) ==
81 // Use capacity as a charge estimate if ChargePercentage is not available
82 battery_submit("charge", v.gauge, NULL);
85 WARNING("battery plugin: Neither \"" STATEFS_ROOT "ChargePercentage\" "
86 "nor \"" STATEFS_ROOT "Capacity\" could be read.");
95 {STATEFS_ROOT "Current", "current", NULL, 1e-6}, // from uA to A
96 {STATEFS_ROOT "Energy", "energy_wh", NULL, 1e-6}, // from uWh to Wh
97 {STATEFS_ROOT "Power", "power", NULL, 1e-6}, // from uW to W
98 {STATEFS_ROOT "Temperature", "temperature", NULL, 0.1}, // from 10xC to C
99 {STATEFS_ROOT "TimeUntilFull", "duration", "full", 1.0},
100 {STATEFS_ROOT "TimeUntilLow", "duration", "low", 1.0},
101 {STATEFS_ROOT "Voltage", "voltage", NULL, 1e-6}, // from uV to V
104 for (size_t i = 0; i < STATIC_ARRAY_SIZE(metrics); i++) {
105 if (parse_value_file(metrics[i].path, &v, DS_TYPE_GAUGE) != 0) {
106 WARNING("battery plugin: Reading \"%s\" failed.", metrics[i].path);
110 battery_submit(metrics[i].type, v.gauge * metrics[i].factor,
111 metrics[i].type_instance);
116 ERROR("battery plugin: statefs backend: none of the statistics are "