1 /**
2 * collectd - src/battery.c
3 * Copyright (C) 2006-2014 Florian octo Forster
4 * Copyright (C) 2008 Michał Mirosław
5 * Copyright (C) 2014 Andy Parkins
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at collectd.org>
22 * Michał Mirosław <mirq-linux at rere.qmqm.pl>
23 * Andy Parkins <andyp at fussylogic.co.uk>
24 **/
26 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
31 #if HAVE_MACH_MACH_TYPES_H
32 #include <mach/mach_types.h>
33 #endif
34 #if HAVE_MACH_MACH_INIT_H
35 #include <mach/mach_init.h>
36 #endif
37 #if HAVE_MACH_MACH_ERROR_H
38 #include <mach/mach_error.h>
39 #endif
40 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
41 #include <CoreFoundation/CoreFoundation.h>
42 #endif
43 #if HAVE_IOKIT_IOKITLIB_H
44 #include <IOKit/IOKitLib.h>
45 #endif
46 #if HAVE_IOKIT_IOTYPES_H
47 #include <IOKit/IOTypes.h>
48 #endif
49 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
50 #include <IOKit/ps/IOPowerSources.h>
51 #endif
52 #if HAVE_IOKIT_PS_IOPSKEYS_H
53 #include <IOKit/ps/IOPSKeys.h>
54 #endif
56 #if !HAVE_IOKIT_IOKITLIB_H && !HAVE_IOKIT_PS_IOPOWERSOURCES_H && !KERNEL_LINUX
57 #error "No applicable input method."
58 #endif
60 #if HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H
61 /* No global variables */
62 /* #endif HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H */
64 #elif KERNEL_LINUX
65 #define PROC_PMU_PATH_FORMAT "/proc/pmu/battery_%i"
66 #define PROC_ACPI_PATH "/proc/acpi/battery"
67 #define PROC_ACPI_FACTOR 0.001
68 #define SYSFS_PATH "/sys/class/power_supply"
69 #define SYSFS_FACTOR 0.000001
70 #endif /* KERNEL_LINUX */
72 int battery_read_statefs(
73 void); /* defined in battery_statefs; used by StateFS backend */
75 static _Bool report_percent = 0;
76 static _Bool report_degraded = 0;
77 static _Bool query_statefs = 0;
79 static void battery_submit2(char const *plugin_instance, /* {{{ */
80 char const *type, char const *type_instance,
81 gauge_t value) {
82 value_list_t vl = VALUE_LIST_INIT;
84 vl.values = &(value_t){.gauge = value};
85 vl.values_len = 1;
86 sstrncpy(vl.plugin, "battery", sizeof(vl.plugin));
87 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
88 sstrncpy(vl.type, type, sizeof(vl.type));
89 if (type_instance != NULL)
90 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
92 plugin_dispatch_values(&vl);
93 } /* }}} void battery_submit2 */
95 static void battery_submit(char const *plugin_instance, /* {{{ */
96 char const *type, gauge_t value) {
97 battery_submit2(plugin_instance, type, NULL, value);
98 } /* }}} void battery_submit */
100 static void submit_capacity(char const *plugin_instance, /* {{{ */
101 gauge_t capacity_charged, gauge_t capacity_full,
102 gauge_t capacity_design) {
103 if (report_percent && (capacity_charged > capacity_full))
104 return;
105 if (report_degraded && (capacity_full > capacity_design))
106 return;
108 if (report_percent) {
109 gauge_t capacity_max;
111 if (report_degraded)
112 capacity_max = capacity_design;
113 else
114 capacity_max = capacity_full;
116 battery_submit2(plugin_instance, "percent", "charged",
117 100.0 * capacity_charged / capacity_max);
118 battery_submit2(plugin_instance, "percent", "discharged",
119 100.0 * (capacity_full - capacity_charged) / capacity_max);
121 if (report_degraded)
122 battery_submit2(plugin_instance, "percent", "degraded",
123 100.0 * (capacity_design - capacity_full) / capacity_max);
124 } else if (report_degraded) /* && !report_percent */
125 {
126 battery_submit2(plugin_instance, "capacity", "charged", capacity_charged);
127 battery_submit2(plugin_instance, "capacity", "discharged",
128 (capacity_full - capacity_charged));
129 battery_submit2(plugin_instance, "capacity", "degraded",
130 (capacity_design - capacity_full));
131 } else /* !report_percent && !report_degraded */
132 {
133 battery_submit(plugin_instance, "capacity", capacity_charged);
134 }
135 } /* }}} void submit_capacity */
137 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H || HAVE_IOKIT_IOKITLIB_H
138 static double dict_get_double(CFDictionaryRef dict,
139 const char *key_string) /* {{{ */
140 {
141 double val_double;
142 long long val_int;
143 CFNumberRef val_obj;
144 CFStringRef key_obj;
146 key_obj = CFStringCreateWithCString(kCFAllocatorDefault, key_string,
147 kCFStringEncodingASCII);
148 if (key_obj == NULL) {
149 DEBUG("CFStringCreateWithCString (%s) failed.\n", key_string);
150 return (NAN);
151 }
153 if ((val_obj = CFDictionaryGetValue(dict, key_obj)) == NULL) {
154 DEBUG("CFDictionaryGetValue (%s) failed.", key_string);
155 CFRelease(key_obj);
156 return (NAN);
157 }
158 CFRelease(key_obj);
160 if (CFGetTypeID(val_obj) == CFNumberGetTypeID()) {
161 if (CFNumberIsFloatType(val_obj)) {
162 CFNumberGetValue(val_obj, kCFNumberDoubleType, &val_double);
163 } else {
164 CFNumberGetValue(val_obj, kCFNumberLongLongType, &val_int);
165 val_double = val_int;
166 }
167 } else {
168 DEBUG("CFGetTypeID (val_obj) = %i", (int)CFGetTypeID(val_obj));
169 return (NAN);
170 }
172 return (val_double);
173 } /* }}} double dict_get_double */
175 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
176 static void get_via_io_power_sources(double *ret_charge, /* {{{ */
177 double *ret_current, double *ret_voltage) {
178 CFTypeRef ps_raw;
179 CFArrayRef ps_array;
180 int ps_array_len;
181 CFDictionaryRef ps_dict;
182 CFTypeRef ps_obj;
184 double temp_double;
186 ps_raw = IOPSCopyPowerSourcesInfo();
187 ps_array = IOPSCopyPowerSourcesList(ps_raw);
188 ps_array_len = CFArrayGetCount(ps_array);
190 DEBUG("ps_array_len == %i", ps_array_len);
192 for (int i = 0; i < ps_array_len; i++) {
193 ps_obj = CFArrayGetValueAtIndex(ps_array, i);
194 ps_dict = IOPSGetPowerSourceDescription(ps_raw, ps_obj);
196 if (ps_dict == NULL) {
197 DEBUG("IOPSGetPowerSourceDescription failed.");
198 continue;
199 }
201 if (CFGetTypeID(ps_dict) != CFDictionaryGetTypeID()) {
202 DEBUG("IOPSGetPowerSourceDescription did not return a CFDictionaryRef");
203 continue;
204 }
206 /* FIXME: Check if this is really an internal battery */
208 if (isnan(*ret_charge)) {
209 /* This is the charge in percent. */
210 temp_double = dict_get_double(ps_dict, kIOPSCurrentCapacityKey);
211 if (!isnan((temp_double)) && (temp_double >= 0.0) &&
212 (temp_double <= 100.0))
213 *ret_charge = temp_double;
214 }
216 if (isnan(*ret_current)) {
217 temp_double = dict_get_double(ps_dict, kIOPSCurrentKey);
218 if (!isnan(temp_double))
219 *ret_current = temp_double / 1000.0;
220 }
222 if (isnan(*ret_voltage)) {
223 temp_double = dict_get_double(ps_dict, kIOPSVoltageKey);
224 if (!isnan(temp_double))
225 *ret_voltage = temp_double / 1000.0;
226 }
227 }
229 CFRelease(ps_array);
230 CFRelease(ps_raw);
231 } /* }}} void get_via_io_power_sources */
232 #endif /* HAVE_IOKIT_PS_IOPOWERSOURCES_H */
234 #if HAVE_IOKIT_IOKITLIB_H
235 static void get_via_generic_iokit(double *ret_capacity_full, /* {{{ */
236 double *ret_capacity_design,
237 double *ret_current, double *ret_voltage) {
238 kern_return_t status;
239 io_iterator_t iterator;
240 io_object_t io_obj;
242 CFDictionaryRef bat_root_dict;
243 CFArrayRef bat_info_arry;
244 CFIndex bat_info_arry_len;
245 CFDictionaryRef bat_info_dict;
247 double temp_double;
249 status = IOServiceGetMatchingServices(
250 kIOMasterPortDefault, IOServiceNameMatching("battery"), &iterator);
251 if (status != kIOReturnSuccess) {
252 DEBUG("IOServiceGetMatchingServices failed.");
253 return;
254 }
256 while ((io_obj = IOIteratorNext(iterator))) {
257 status = IORegistryEntryCreateCFProperties(
258 io_obj, (CFMutableDictionaryRef *)&bat_root_dict, kCFAllocatorDefault,
259 kNilOptions);
260 if (status != kIOReturnSuccess) {
261 DEBUG("IORegistryEntryCreateCFProperties failed.");
262 continue;
263 }
265 bat_info_arry =
266 (CFArrayRef)CFDictionaryGetValue(bat_root_dict, CFSTR("IOBatteryInfo"));
267 if (bat_info_arry == NULL) {
268 CFRelease(bat_root_dict);
269 continue;
270 }
271 bat_info_arry_len = CFArrayGetCount(bat_info_arry);
273 for (CFIndex bat_info_arry_pos = 0; bat_info_arry_pos < bat_info_arry_len;
274 bat_info_arry_pos++) {
275 bat_info_dict = (CFDictionaryRef)CFArrayGetValueAtIndex(
276 bat_info_arry, bat_info_arry_pos);
278 if (isnan(*ret_capacity_full)) {
279 temp_double = dict_get_double(bat_info_dict, "Capacity");
280 *ret_capacity_full = temp_double / 1000.0;
281 }
283 if (isnan(*ret_capacity_design)) {
284 temp_double = dict_get_double(bat_info_dict, "AbsoluteMaxCapacity");
285 *ret_capacity_design = temp_double / 1000.0;
286 }
288 if (isnan(*ret_current)) {
289 temp_double = dict_get_double(bat_info_dict, "Current");
290 *ret_current = temp_double / 1000.0;
291 }
293 if (isnan(*ret_voltage)) {
294 temp_double = dict_get_double(bat_info_dict, "Voltage");
295 *ret_voltage = temp_double / 1000.0;
296 }
297 }
299 CFRelease(bat_root_dict);
300 }
302 IOObjectRelease(iterator);
303 } /* }}} void get_via_generic_iokit */
304 #endif /* HAVE_IOKIT_IOKITLIB_H */
306 static int battery_read(void) /* {{{ */
307 {
308 gauge_t current = NAN; /* Current in A */
309 gauge_t voltage = NAN; /* Voltage in V */
311 /* We only get the charged capacity as a percentage from
312 * IOPowerSources. IOKit, on the other hand, only reports the full
313 * capacity. We use the two to calculate the current charged capacity. */
314 gauge_t charge_rel = NAN; /* Current charge in percent */
315 gauge_t capacity_charged; /* Charged capacity */
316 gauge_t capacity_full = NAN; /* Total capacity */
317 gauge_t capacity_design = NAN; /* Full design capacity */
319 if (query_statefs)
320 return battery_read_statefs();
322 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
323 get_via_io_power_sources(&charge_rel, ¤t, &voltage);
324 #endif
325 #if HAVE_IOKIT_IOKITLIB_H
326 get_via_generic_iokit(&capacity_full, &capacity_design, ¤t, &voltage);
327 #endif
329 capacity_charged = charge_rel * capacity_full / 100.0;
330 submit_capacity("0", capacity_charged, capacity_full, capacity_design);
332 if (!isnan(current))
333 battery_submit("0", "current", current);
334 if (!isnan(voltage))
335 battery_submit("0", "voltage", voltage);
337 return (0);
338 } /* }}} int battery_read */
339 /* #endif HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H */
341 #elif KERNEL_LINUX
342 /* Reads a file which contains only a number (and optionally a trailing
343 * newline) and parses that number. */
344 static int sysfs_file_to_buffer(char const *dir, /* {{{ */
345 char const *power_supply, char const *basename,
346 char *buffer, size_t buffer_size) {
347 char filename[PATH_MAX];
348 int status;
350 ssnprintf(filename, sizeof(filename), "%s/%s/%s", dir, power_supply,
351 basename);
353 status = (int)read_file_contents(filename, buffer, buffer_size - 1);
354 if (status < 0)
355 return status;
357 buffer[status] = '\0';
359 strstripnewline(buffer);
360 return 0;
361 } /* }}} int sysfs_file_to_buffer */
363 /* Reads a file which contains only a number (and optionally a trailing
364 * newline) and parses that number. */
365 static int sysfs_file_to_gauge(char const *dir, /* {{{ */
366 char const *power_supply, char const *basename,
367 gauge_t *ret_value) {
368 int status;
369 char buffer[32];
371 status =
372 sysfs_file_to_buffer(dir, power_supply, basename, buffer, sizeof(buffer));
373 if (status != 0)
374 return (status);
376 return (strtogauge(buffer, ret_value));
377 } /* }}} sysfs_file_to_gauge */
379 static int read_sysfs_capacity(char const *dir, /* {{{ */
380 char const *power_supply,
381 char const *plugin_instance) {
382 gauge_t capacity_charged = NAN;
383 gauge_t capacity_full = NAN;
384 gauge_t capacity_design = NAN;
385 int status;
387 status =
388 sysfs_file_to_gauge(dir, power_supply, "energy_now", &capacity_charged);
389 if (status != 0)
390 return (status);
392 status =
393 sysfs_file_to_gauge(dir, power_supply, "energy_full", &capacity_full);
394 if (status != 0)
395 return (status);
397 status = sysfs_file_to_gauge(dir, power_supply, "energy_full_design",
398 &capacity_design);
399 if (status != 0)
400 return (status);
402 submit_capacity(plugin_instance, capacity_charged * SYSFS_FACTOR,
403 capacity_full * SYSFS_FACTOR, capacity_design * SYSFS_FACTOR);
404 return (0);
405 } /* }}} int read_sysfs_capacity */
407 static int read_sysfs_callback(char const *dir, /* {{{ */
408 char const *power_supply, void *user_data) {
409 int *battery_index = user_data;
411 char const *plugin_instance;
412 char buffer[32];
413 gauge_t v = NAN;
414 _Bool discharging = 0;
415 int status;
417 /* Ignore non-battery directories, such as AC power. */
418 status =
419 sysfs_file_to_buffer(dir, power_supply, "type", buffer, sizeof(buffer));
420 if (status != 0)
421 return (0);
422 if (strcasecmp("Battery", buffer) != 0)
423 return (0);
425 (void)sysfs_file_to_buffer(dir, power_supply, "status", buffer,
426 sizeof(buffer));
427 if (strcasecmp("Discharging", buffer) == 0)
428 discharging = 1;
430 /* FIXME: This is a dirty hack for backwards compatibility: The battery
431 * plugin, for a very long time, has had the plugin_instance
432 * hard-coded to "0". So, to keep backwards compatibility, we'll use
433 * "0" for the first battery we find and the power_supply name for all
434 * following. This should be reverted in a future major version. */
435 plugin_instance = (*battery_index == 0) ? "0" : power_supply;
436 (*battery_index)++;
438 read_sysfs_capacity(dir, power_supply, plugin_instance);
440 if (sysfs_file_to_gauge(dir, power_supply, "power_now", &v) == 0) {
441 if (discharging)
442 v *= -1.0;
443 battery_submit(plugin_instance, "power", v * SYSFS_FACTOR);
444 }
445 if (sysfs_file_to_gauge(dir, power_supply, "current_now", &v) == 0) {
446 if (discharging)
447 v *= -1.0;
448 battery_submit(plugin_instance, "current", v * SYSFS_FACTOR);
449 }
451 if (sysfs_file_to_gauge(dir, power_supply, "voltage_now", &v) == 0)
452 battery_submit(plugin_instance, "voltage", v * SYSFS_FACTOR);
454 return (0);
455 } /* }}} int read_sysfs_callback */
457 static int read_sysfs(void) /* {{{ */
458 {
459 int status;
460 int battery_counter = 0;
462 if (access(SYSFS_PATH, R_OK) != 0)
463 return (ENOENT);
465 status = walk_directory(SYSFS_PATH, read_sysfs_callback,
466 /* user_data = */ &battery_counter,
467 /* include hidden */ 0);
468 return (status);
469 } /* }}} int read_sysfs */
471 static int read_acpi_full_capacity(char const *dir, /* {{{ */
472 char const *power_supply,
473 gauge_t *ret_capacity_full,
474 gauge_t *ret_capacity_design)
476 {
477 char filename[PATH_MAX];
478 char buffer[1024];
480 FILE *fh;
482 ssnprintf(filename, sizeof(filename), "%s/%s/info", dir, power_supply);
483 fh = fopen(filename, "r");
484 if (fh == NULL)
485 return (errno);
487 /* last full capacity: 40090 mWh */
488 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
489 gauge_t *value_ptr;
490 int fields_num;
491 char *fields[8];
492 int index;
494 if (strncmp("last full capacity:", buffer, strlen("last full capacity:")) ==
495 0) {
496 value_ptr = ret_capacity_full;
497 index = 3;
498 } else if (strncmp("design capacity:", buffer,
499 strlen("design capacity:")) == 0) {
500 value_ptr = ret_capacity_design;
501 index = 2;
502 } else {
503 continue;
504 }
506 fields_num = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
507 if (fields_num <= index)
508 continue;
510 strtogauge(fields[index], value_ptr);
511 }
513 fclose(fh);
514 return (0);
515 } /* }}} int read_acpi_full_capacity */
517 static int read_acpi_callback(char const *dir, /* {{{ */
518 char const *power_supply, void *user_data) {
519 int *battery_index = user_data;
521 gauge_t power = NAN;
522 gauge_t voltage = NAN;
523 gauge_t capacity_charged = NAN;
524 gauge_t capacity_full = NAN;
525 gauge_t capacity_design = NAN;
526 _Bool charging = 0;
527 _Bool is_current = 0;
529 char const *plugin_instance;
530 char filename[PATH_MAX];
531 char buffer[1024];
533 FILE *fh;
535 ssnprintf(filename, sizeof(filename), "%s/%s/state", dir, power_supply);
536 fh = fopen(filename, "r");
537 if (fh == NULL) {
538 if ((errno == EAGAIN) || (errno == EINTR) || (errno == ENOENT))
539 return (0);
540 else
541 return (errno);
542 }
544 /*
545 * [11:00] <@tokkee> $ cat /proc/acpi/battery/BAT1/state
546 * [11:00] <@tokkee> present: yes
547 * [11:00] <@tokkee> capacity state: ok
548 * [11:00] <@tokkee> charging state: charging
549 * [11:00] <@tokkee> present rate: 1724 mA
550 * [11:00] <@tokkee> remaining capacity: 4136 mAh
551 * [11:00] <@tokkee> present voltage: 12428 mV
552 */
553 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
554 char *fields[8];
555 int numfields;
557 numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
558 if (numfields < 3)
559 continue;
561 if ((strcmp(fields[0], "charging") == 0) &&
562 (strcmp(fields[1], "state:") == 0)) {
563 if (strcmp(fields[2], "charging") == 0)
564 charging = 1;
565 else
566 charging = 0;
567 continue;
568 }
570 /* The unit of "present rate" depends on the battery. Modern
571 * batteries export power (watts), older batteries (used to)
572 * export current (amperes). We check the fourth column and try
573 * to find old batteries this way. */
574 if ((strcmp(fields[0], "present") == 0) &&
575 (strcmp(fields[1], "rate:") == 0)) {
576 strtogauge(fields[2], &power);
578 if ((numfields >= 4) && (strcmp("mA", fields[3]) == 0))
579 is_current = 1;
580 } else if ((strcmp(fields[0], "remaining") == 0) &&
581 (strcmp(fields[1], "capacity:") == 0))
582 strtogauge(fields[2], &capacity_charged);
583 else if ((strcmp(fields[0], "present") == 0) &&
584 (strcmp(fields[1], "voltage:") == 0))
585 strtogauge(fields[2], &voltage);
586 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
588 fclose(fh);
590 if (!charging)
591 power *= -1.0;
593 /* FIXME: This is a dirty hack for backwards compatibility: The battery
594 * plugin, for a very long time, has had the plugin_instance
595 * hard-coded to "0". So, to keep backwards compatibility, we'll use
596 * "0" for the first battery we find and the power_supply name for all
597 * following. This should be reverted in a future major version. */
598 plugin_instance = (*battery_index == 0) ? "0" : power_supply;
599 (*battery_index)++;
601 read_acpi_full_capacity(dir, power_supply, &capacity_full, &capacity_design);
603 submit_capacity(plugin_instance, capacity_charged * PROC_ACPI_FACTOR,
604 capacity_full * PROC_ACPI_FACTOR,
605 capacity_design * PROC_ACPI_FACTOR);
607 battery_submit(plugin_instance, is_current ? "current" : "power",
608 power * PROC_ACPI_FACTOR);
609 battery_submit(plugin_instance, "voltage", voltage * PROC_ACPI_FACTOR);
611 return 0;
612 } /* }}} int read_acpi_callback */
614 static int read_acpi(void) /* {{{ */
615 {
616 int status;
617 int battery_counter = 0;
619 if (access(PROC_ACPI_PATH, R_OK) != 0)
620 return (ENOENT);
622 status = walk_directory(PROC_ACPI_PATH, read_acpi_callback,
623 /* user_data = */ &battery_counter,
624 /* include hidden */ 0);
625 return (status);
626 } /* }}} int read_acpi */
628 static int read_pmu(void) /* {{{ */
629 {
630 int i = 0;
631 /* The upper limit here is just a safeguard. If there is a system with
632 * more than 100 batteries, this can easily be increased. */
633 for (; i < 100; i++) {
634 FILE *fh;
636 char buffer[1024];
637 char filename[PATH_MAX];
638 char plugin_instance[DATA_MAX_NAME_LEN];
640 gauge_t current = NAN;
641 gauge_t voltage = NAN;
642 gauge_t charge = NAN;
644 ssnprintf(filename, sizeof(filename), PROC_PMU_PATH_FORMAT, i);
645 if (access(filename, R_OK) != 0)
646 break;
648 ssnprintf(plugin_instance, sizeof(plugin_instance), "%i", i);
650 fh = fopen(filename, "r");
651 if (fh == NULL) {
652 if (errno == ENOENT)
653 break;
654 else if ((errno == EAGAIN) || (errno == EINTR))
655 continue;
656 else
657 return (errno);
658 }
660 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
661 char *fields[8];
662 int numfields;
664 numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
665 if (numfields < 3)
666 continue;
668 if (strcmp("current", fields[0]) == 0)
669 strtogauge(fields[2], ¤t);
670 else if (strcmp("voltage", fields[0]) == 0)
671 strtogauge(fields[2], &voltage);
672 else if (strcmp("charge", fields[0]) == 0)
673 strtogauge(fields[2], &charge);
674 }
676 fclose(fh);
677 fh = NULL;
679 battery_submit(plugin_instance, "charge", charge / 1000.0);
680 battery_submit(plugin_instance, "current", current / 1000.0);
681 battery_submit(plugin_instance, "voltage", voltage / 1000.0);
682 }
684 if (i == 0)
685 return (ENOENT);
686 return (0);
687 } /* }}} int read_pmu */
689 static int battery_read(void) /* {{{ */
690 {
691 int status;
693 if (query_statefs)
694 return battery_read_statefs();
696 DEBUG("battery plugin: Trying sysfs ...");
697 status = read_sysfs();
698 if (status == 0)
699 return (0);
701 DEBUG("battery plugin: Trying acpi ...");
702 status = read_acpi();
703 if (status == 0)
704 return (0);
706 DEBUG("battery plugin: Trying pmu ...");
707 status = read_pmu();
708 if (status == 0)
709 return (0);
711 ERROR("battery plugin: All available input methods failed.");
712 return (-1);
713 } /* }}} int battery_read */
714 #endif /* KERNEL_LINUX */
716 static int battery_config(oconfig_item_t *ci) {
717 for (int i = 0; i < ci->children_num; i++) {
718 oconfig_item_t *child = ci->children + i;
720 if (strcasecmp("ValuesPercentage", child->key) == 0)
721 cf_util_get_boolean(child, &report_percent);
722 else if (strcasecmp("ReportDegraded", child->key) == 0)
723 cf_util_get_boolean(child, &report_degraded);
724 else if (strcasecmp("QueryStateFS", child->key) == 0)
725 cf_util_get_boolean(child, &query_statefs);
726 else
727 WARNING("battery plugin: Ignoring unknown "
728 "configuration option \"%s\".",
729 child->key);
730 }
732 return (0);
733 } /* }}} int battery_config */
735 void module_register(void) {
736 plugin_register_complex_config("battery", battery_config);
737 plugin_register_read("battery", battery_read);
738 } /* void module_register */