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 (void); /* defined in battery_statefs; used by StateFS backend */
74 static _Bool report_percent = 0;
75 static _Bool report_degraded = 0;
76 static _Bool query_statefs = 0;
78 static void battery_submit2 (char const *plugin_instance, /* {{{ */
79 char const *type, char const *type_instance, gauge_t value)
80 {
81 value_t values[1];
82 value_list_t vl = VALUE_LIST_INIT;
84 values[0].gauge = value;
86 vl.values = values;
87 vl.values_len = 1;
88 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
89 sstrncpy (vl.plugin, "battery", sizeof (vl.plugin));
90 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
91 sstrncpy (vl.type, type, sizeof (vl.type));
92 if (type_instance != NULL)
93 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
95 plugin_dispatch_values (&vl);
96 } /* }}} void battery_submit2 */
98 static void battery_submit (char const *plugin_instance, /* {{{ */
99 char const *type, gauge_t value)
100 {
101 battery_submit2 (plugin_instance, type, NULL, value);
102 } /* }}} void battery_submit */
104 static void submit_capacity (char const *plugin_instance, /* {{{ */
105 gauge_t capacity_charged,
106 gauge_t capacity_full,
107 gauge_t capacity_design)
108 {
109 if (report_percent && (capacity_charged > capacity_full))
110 return;
111 if (report_degraded && (capacity_full > capacity_design))
112 return;
114 if (report_percent)
115 {
116 gauge_t capacity_max;
118 if (report_degraded)
119 capacity_max = capacity_design;
120 else
121 capacity_max = capacity_full;
123 battery_submit2 (plugin_instance, "percent", "charged",
124 100.0 * capacity_charged / capacity_max);
125 battery_submit2 (plugin_instance, "percent", "discharged",
126 100.0 * (capacity_full - capacity_charged) / capacity_max);
128 if (report_degraded)
129 battery_submit2 (plugin_instance, "percent", "degraded",
130 100.0 * (capacity_design - capacity_full) / capacity_max);
131 }
132 else if (report_degraded) /* && !report_percent */
133 {
134 battery_submit2 (plugin_instance, "capacity", "charged",
135 capacity_charged);
136 battery_submit2 (plugin_instance, "capacity", "discharged",
137 (capacity_full - capacity_charged));
138 battery_submit2 (plugin_instance, "capacity", "degraded",
139 (capacity_design - capacity_full));
140 }
141 else /* !report_percent && !report_degraded */
142 {
143 battery_submit (plugin_instance, "capacity", capacity_charged);
144 }
145 } /* }}} void submit_capacity */
147 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H || HAVE_IOKIT_IOKITLIB_H
148 static double dict_get_double (CFDictionaryRef dict, const char *key_string) /* {{{ */
149 {
150 double val_double;
151 long long val_int;
152 CFNumberRef val_obj;
153 CFStringRef key_obj;
155 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key_string,
156 kCFStringEncodingASCII);
157 if (key_obj == NULL)
158 {
159 DEBUG ("CFStringCreateWithCString (%s) failed.\n", key_string);
160 return (NAN);
161 }
163 if ((val_obj = CFDictionaryGetValue (dict, key_obj)) == NULL)
164 {
165 DEBUG ("CFDictionaryGetValue (%s) failed.", key_string);
166 CFRelease (key_obj);
167 return (NAN);
168 }
169 CFRelease (key_obj);
171 if (CFGetTypeID (val_obj) == CFNumberGetTypeID ())
172 {
173 if (CFNumberIsFloatType (val_obj))
174 {
175 CFNumberGetValue (val_obj,
176 kCFNumberDoubleType,
177 &val_double);
178 }
179 else
180 {
181 CFNumberGetValue (val_obj,
182 kCFNumberLongLongType,
183 &val_int);
184 val_double = val_int;
185 }
186 }
187 else
188 {
189 DEBUG ("CFGetTypeID (val_obj) = %i", (int) CFGetTypeID (val_obj));
190 return (NAN);
191 }
193 return (val_double);
194 } /* }}} double dict_get_double */
196 # if HAVE_IOKIT_PS_IOPOWERSOURCES_H
197 static void get_via_io_power_sources (double *ret_charge, /* {{{ */
198 double *ret_current,
199 double *ret_voltage)
200 {
201 CFTypeRef ps_raw;
202 CFArrayRef ps_array;
203 int ps_array_len;
204 CFDictionaryRef ps_dict;
205 CFTypeRef ps_obj;
207 double temp_double;
209 ps_raw = IOPSCopyPowerSourcesInfo ();
210 ps_array = IOPSCopyPowerSourcesList (ps_raw);
211 ps_array_len = CFArrayGetCount (ps_array);
213 DEBUG ("ps_array_len == %i", ps_array_len);
215 for (int i = 0; i < ps_array_len; i++)
216 {
217 ps_obj = CFArrayGetValueAtIndex (ps_array, i);
218 ps_dict = IOPSGetPowerSourceDescription (ps_raw, ps_obj);
220 if (ps_dict == NULL)
221 {
222 DEBUG ("IOPSGetPowerSourceDescription failed.");
223 continue;
224 }
226 if (CFGetTypeID (ps_dict) != CFDictionaryGetTypeID ())
227 {
228 DEBUG ("IOPSGetPowerSourceDescription did not return a CFDictionaryRef");
229 continue;
230 }
232 /* FIXME: Check if this is really an internal battery */
234 if (isnan (*ret_charge))
235 {
236 /* This is the charge in percent. */
237 temp_double = dict_get_double (ps_dict,
238 kIOPSCurrentCapacityKey);
239 if (!isnan ((temp_double))
240 && (temp_double >= 0.0)
241 && (temp_double <= 100.0))
242 *ret_charge = temp_double;
243 }
245 if (isnan (*ret_current))
246 {
247 temp_double = dict_get_double (ps_dict,
248 kIOPSCurrentKey);
249 if (!isnan (temp_double))
250 *ret_current = temp_double / 1000.0;
251 }
253 if (isnan (*ret_voltage))
254 {
255 temp_double = dict_get_double (ps_dict,
256 kIOPSVoltageKey);
257 if (!isnan (temp_double))
258 *ret_voltage = temp_double / 1000.0;
259 }
260 }
262 CFRelease(ps_array);
263 CFRelease(ps_raw);
264 } /* }}} void get_via_io_power_sources */
265 # endif /* HAVE_IOKIT_PS_IOPOWERSOURCES_H */
267 # if HAVE_IOKIT_IOKITLIB_H
268 static void get_via_generic_iokit (double *ret_capacity_full, /* {{{ */
269 double *ret_capacity_design,
270 double *ret_current,
271 double *ret_voltage)
272 {
273 kern_return_t status;
274 io_iterator_t iterator;
275 io_object_t io_obj;
277 CFDictionaryRef bat_root_dict;
278 CFArrayRef bat_info_arry;
279 CFIndex bat_info_arry_len;
280 CFDictionaryRef bat_info_dict;
282 double temp_double;
284 status = IOServiceGetMatchingServices (kIOMasterPortDefault,
285 IOServiceNameMatching ("battery"),
286 &iterator);
287 if (status != kIOReturnSuccess)
288 {
289 DEBUG ("IOServiceGetMatchingServices failed.");
290 return;
291 }
293 while ((io_obj = IOIteratorNext (iterator)))
294 {
295 status = IORegistryEntryCreateCFProperties (io_obj,
296 (CFMutableDictionaryRef *) &bat_root_dict,
297 kCFAllocatorDefault,
298 kNilOptions);
299 if (status != kIOReturnSuccess)
300 {
301 DEBUG ("IORegistryEntryCreateCFProperties failed.");
302 continue;
303 }
305 bat_info_arry = (CFArrayRef) CFDictionaryGetValue (bat_root_dict,
306 CFSTR ("IOBatteryInfo"));
307 if (bat_info_arry == NULL)
308 {
309 CFRelease (bat_root_dict);
310 continue;
311 }
312 bat_info_arry_len = CFArrayGetCount (bat_info_arry);
314 for (CFIndex bat_info_arry_pos = 0;
315 bat_info_arry_pos < bat_info_arry_len;
316 bat_info_arry_pos++)
317 {
318 bat_info_dict = (CFDictionaryRef) CFArrayGetValueAtIndex (bat_info_arry, bat_info_arry_pos);
320 if (isnan (*ret_capacity_full))
321 {
322 temp_double = dict_get_double (bat_info_dict, "Capacity");
323 *ret_capacity_full = temp_double / 1000.0;
324 }
326 if (isnan (*ret_capacity_design))
327 {
328 temp_double = dict_get_double (bat_info_dict, "AbsoluteMaxCapacity");
329 *ret_capacity_design = temp_double / 1000.0;
330 }
332 if (isnan (*ret_current))
333 {
334 temp_double = dict_get_double (bat_info_dict, "Current");
335 *ret_current = temp_double / 1000.0;
336 }
338 if (isnan (*ret_voltage))
339 {
340 temp_double = dict_get_double (bat_info_dict, "Voltage");
341 *ret_voltage = temp_double / 1000.0;
342 }
343 }
345 CFRelease (bat_root_dict);
346 }
348 IOObjectRelease (iterator);
349 } /* }}} void get_via_generic_iokit */
350 # endif /* HAVE_IOKIT_IOKITLIB_H */
352 static int battery_read (void) /* {{{ */
353 {
354 gauge_t current = NAN; /* Current in A */
355 gauge_t voltage = NAN; /* Voltage in V */
357 /* We only get the charged capacity as a percentage from
358 * IOPowerSources. IOKit, on the other hand, only reports the full
359 * capacity. We use the two to calculate the current charged capacity. */
360 gauge_t charge_rel = NAN; /* Current charge in percent */
361 gauge_t capacity_charged; /* Charged capacity */
362 gauge_t capacity_full = NAN; /* Total capacity */
363 gauge_t capacity_design = NAN; /* Full design capacity */
365 if (query_statefs)
366 return battery_read_statefs ();
368 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
369 get_via_io_power_sources (&charge_rel, ¤t, &voltage);
370 #endif
371 #if HAVE_IOKIT_IOKITLIB_H
372 get_via_generic_iokit (&capacity_full, &capacity_design, ¤t, &voltage);
373 #endif
375 capacity_charged = charge_rel * capacity_full / 100.0;
376 submit_capacity ("0", capacity_charged, capacity_full, capacity_design);
378 if (!isnan (current))
379 battery_submit ("0", "current", current);
380 if (!isnan (voltage))
381 battery_submit ("0", "voltage", voltage);
383 return (0);
384 } /* }}} int battery_read */
385 /* #endif HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H */
387 #elif KERNEL_LINUX
388 /* Reads a file which contains only a number (and optionally a trailing
389 * newline) and parses that number. */
390 static int sysfs_file_to_buffer(char const *dir, /* {{{ */
391 char const *power_supply,
392 char const *basename,
393 char *buffer, size_t buffer_size)
394 {
395 char filename[PATH_MAX];
396 int status;
398 ssnprintf (filename, sizeof (filename), "%s/%s/%s",
399 dir, power_supply, basename);
401 status = (int) read_file_contents (filename, buffer, buffer_size);
402 if (status < 0)
403 return status;
405 strstripnewline (buffer);
406 return 0;
407 } /* }}} int sysfs_file_to_buffer */
409 /* Reads a file which contains only a number (and optionally a trailing
410 * newline) and parses that number. */
411 static int sysfs_file_to_gauge(char const *dir, /* {{{ */
412 char const *power_supply,
413 char const *basename, gauge_t *ret_value)
414 {
415 int status;
416 char buffer[32] = "";
418 status = sysfs_file_to_buffer (dir, power_supply, basename, buffer, sizeof (buffer));
419 if (status != 0)
420 return (status);
422 return (strtogauge (buffer, ret_value));
423 } /* }}} sysfs_file_to_gauge */
425 static int read_sysfs_capacity (char const *dir, /* {{{ */
426 char const *power_supply,
427 char const *plugin_instance)
428 {
429 gauge_t capacity_charged = NAN;
430 gauge_t capacity_full = NAN;
431 gauge_t capacity_design = NAN;
432 int status;
434 status = sysfs_file_to_gauge (dir, power_supply, "energy_now", &capacity_charged);
435 if (status != 0)
436 return (status);
438 status = sysfs_file_to_gauge (dir, power_supply, "energy_full", &capacity_full);
439 if (status != 0)
440 return (status);
442 status = sysfs_file_to_gauge (dir, power_supply, "energy_full_design", &capacity_design);
443 if (status != 0)
444 return (status);
446 submit_capacity (plugin_instance,
447 capacity_charged * SYSFS_FACTOR,
448 capacity_full * SYSFS_FACTOR,
449 capacity_design * SYSFS_FACTOR);
450 return (0);
451 } /* }}} int read_sysfs_capacity */
453 static int read_sysfs_callback (char const *dir, /* {{{ */
454 char const *power_supply,
455 void *user_data)
456 {
457 int *battery_index = user_data;
459 char const *plugin_instance;
460 char buffer[32];
461 gauge_t v = NAN;
462 _Bool discharging = 0;
463 int status;
465 /* Ignore non-battery directories, such as AC power. */
466 status = sysfs_file_to_buffer (dir, power_supply, "type", buffer, sizeof (buffer));
467 if (status != 0)
468 return (0);
469 if (strcasecmp ("Battery", buffer) != 0)
470 return (0);
472 (void) sysfs_file_to_buffer (dir, power_supply, "status", buffer, sizeof (buffer));
473 if (strcasecmp ("Discharging", buffer) == 0)
474 discharging = 1;
476 /* FIXME: This is a dirty hack for backwards compatibility: The battery
477 * plugin, for a very long time, has had the plugin_instance
478 * hard-coded to "0". So, to keep backwards compatibility, we'll use
479 * "0" for the first battery we find and the power_supply name for all
480 * following. This should be reverted in a future major version. */
481 plugin_instance = (*battery_index == 0) ? "0" : power_supply;
482 (*battery_index)++;
484 read_sysfs_capacity (dir, power_supply, plugin_instance);
486 if (sysfs_file_to_gauge (dir, power_supply, "power_now", &v) == 0)
487 {
488 if (discharging)
489 v *= -1.0;
490 battery_submit (plugin_instance, "power", v * SYSFS_FACTOR);
491 }
492 if (sysfs_file_to_gauge (dir, power_supply, "current_now", &v) == 0)
493 {
494 if (discharging)
495 v *= -1.0;
496 battery_submit (plugin_instance, "current", v * SYSFS_FACTOR);
497 }
499 if (sysfs_file_to_gauge (dir, power_supply, "voltage_now", &v) == 0)
500 battery_submit (plugin_instance, "voltage", v * SYSFS_FACTOR);
502 return (0);
503 } /* }}} int read_sysfs_callback */
505 static int read_sysfs (void) /* {{{ */
506 {
507 int status;
508 int battery_counter = 0;
510 if (access (SYSFS_PATH, R_OK) != 0)
511 return (ENOENT);
513 status = walk_directory (SYSFS_PATH, read_sysfs_callback,
514 /* user_data = */ &battery_counter,
515 /* include hidden */ 0);
516 return (status);
517 } /* }}} int read_sysfs */
519 static int read_acpi_full_capacity (char const *dir, /* {{{ */
520 char const *power_supply,
521 gauge_t *ret_capacity_full,
522 gauge_t *ret_capacity_design)
524 {
525 char filename[PATH_MAX];
526 char buffer[1024];
528 FILE *fh;
530 ssnprintf (filename, sizeof (filename), "%s/%s/info", dir, power_supply);
531 fh = fopen (filename, "r");
532 if (fh == NULL)
533 return (errno);
535 /* last full capacity: 40090 mWh */
536 while (fgets (buffer, sizeof (buffer), fh) != NULL)
537 {
538 gauge_t *value_ptr;
539 int fields_num;
540 char *fields[8];
541 int index;
543 if (strncmp ("last full capacity:", buffer, strlen ("last full capacity:")) == 0)
544 {
545 value_ptr = ret_capacity_full;
546 index = 3;
547 }
548 else if (strncmp ("design capacity:", buffer, strlen ("design capacity:")) == 0)
549 {
550 value_ptr = ret_capacity_design;
551 index = 2;
552 }
553 else
554 {
555 continue;
556 }
558 fields_num = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
559 if (fields_num <= index)
560 continue;
562 strtogauge (fields[index], value_ptr);
563 }
565 fclose (fh);
566 return (0);
567 } /* }}} int read_acpi_full_capacity */
569 static int read_acpi_callback (char const *dir, /* {{{ */
570 char const *power_supply,
571 void *user_data)
572 {
573 int *battery_index = user_data;
575 gauge_t power = NAN;
576 gauge_t voltage = NAN;
577 gauge_t capacity_charged = NAN;
578 gauge_t capacity_full = NAN;
579 gauge_t capacity_design = NAN;
580 _Bool charging = 0;
581 _Bool is_current = 0;
583 char const *plugin_instance;
584 char filename[PATH_MAX];
585 char buffer[1024];
587 FILE *fh;
589 ssnprintf (filename, sizeof (filename), "%s/%s/state", dir, power_supply);
590 fh = fopen (filename, "r");
591 if (fh == NULL)
592 {
593 if ((errno == EAGAIN) || (errno == EINTR) || (errno == ENOENT))
594 return (0);
595 else
596 return (errno);
597 }
599 /*
600 * [11:00] <@tokkee> $ cat /proc/acpi/battery/BAT1/state
601 * [11:00] <@tokkee> present: yes
602 * [11:00] <@tokkee> capacity state: ok
603 * [11:00] <@tokkee> charging state: charging
604 * [11:00] <@tokkee> present rate: 1724 mA
605 * [11:00] <@tokkee> remaining capacity: 4136 mAh
606 * [11:00] <@tokkee> present voltage: 12428 mV
607 */
608 while (fgets (buffer, sizeof (buffer), fh) != NULL)
609 {
610 char *fields[8];
611 int numfields;
613 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
614 if (numfields < 3)
615 continue;
617 if ((strcmp (fields[0], "charging") == 0)
618 && (strcmp (fields[1], "state:") == 0))
619 {
620 if (strcmp (fields[2], "charging") == 0)
621 charging = 1;
622 else
623 charging = 0;
624 continue;
625 }
627 /* The unit of "present rate" depends on the battery. Modern
628 * batteries export power (watts), older batteries (used to)
629 * export current (amperes). We check the fourth column and try
630 * to find old batteries this way. */
631 if ((strcmp (fields[0], "present") == 0)
632 && (strcmp (fields[1], "rate:") == 0))
633 {
634 strtogauge (fields[2], &power);
636 if ((numfields >= 4) && (strcmp ("mA", fields[3]) == 0))
637 is_current = 1;
638 }
639 else if ((strcmp (fields[0], "remaining") == 0)
640 && (strcmp (fields[1], "capacity:") == 0))
641 strtogauge (fields[2], &capacity_charged);
642 else if ((strcmp (fields[0], "present") == 0)
643 && (strcmp (fields[1], "voltage:") == 0))
644 strtogauge (fields[2], &voltage);
645 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
647 fclose (fh);
649 if (!charging)
650 power *= -1.0;
652 /* FIXME: This is a dirty hack for backwards compatibility: The battery
653 * plugin, for a very long time, has had the plugin_instance
654 * hard-coded to "0". So, to keep backwards compatibility, we'll use
655 * "0" for the first battery we find and the power_supply name for all
656 * following. This should be reverted in a future major version. */
657 plugin_instance = (*battery_index == 0) ? "0" : power_supply;
658 (*battery_index)++;
660 read_acpi_full_capacity (dir, power_supply, &capacity_full, &capacity_design);
662 submit_capacity (plugin_instance,
663 capacity_charged * PROC_ACPI_FACTOR,
664 capacity_full * PROC_ACPI_FACTOR,
665 capacity_design * PROC_ACPI_FACTOR);
667 battery_submit (plugin_instance,
668 is_current ? "current" : "power",
669 power * PROC_ACPI_FACTOR);
670 battery_submit (plugin_instance, "voltage", voltage * PROC_ACPI_FACTOR);
672 return 0;
673 } /* }}} int read_acpi_callback */
675 static int read_acpi (void) /* {{{ */
676 {
677 int status;
678 int battery_counter = 0;
680 if (access (PROC_ACPI_PATH, R_OK) != 0)
681 return (ENOENT);
683 status = walk_directory (PROC_ACPI_PATH, read_acpi_callback,
684 /* user_data = */ &battery_counter,
685 /* include hidden */ 0);
686 return (status);
687 } /* }}} int read_acpi */
689 static int read_pmu (void) /* {{{ */
690 {
691 int i = 0;
692 /* The upper limit here is just a safeguard. If there is a system with
693 * more than 100 batteries, this can easily be increased. */
694 for (; i < 100; i++)
695 {
696 FILE *fh;
698 char buffer[1024];
699 char filename[PATH_MAX];
700 char plugin_instance[DATA_MAX_NAME_LEN];
702 gauge_t current = NAN;
703 gauge_t voltage = NAN;
704 gauge_t charge = NAN;
706 ssnprintf (filename, sizeof (filename), PROC_PMU_PATH_FORMAT, i);
707 if (access (filename, R_OK) != 0)
708 break;
710 ssnprintf (plugin_instance, sizeof (plugin_instance), "%i", i);
712 fh = fopen (filename, "r");
713 if (fh == NULL)
714 {
715 if (errno == ENOENT)
716 break;
717 else if ((errno == EAGAIN) || (errno == EINTR))
718 continue;
719 else
720 return (errno);
721 }
723 while (fgets (buffer, sizeof (buffer), fh) != NULL)
724 {
725 char *fields[8];
726 int numfields;
728 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
729 if (numfields < 3)
730 continue;
732 if (strcmp ("current", fields[0]) == 0)
733 strtogauge (fields[2], ¤t);
734 else if (strcmp ("voltage", fields[0]) == 0)
735 strtogauge (fields[2], &voltage);
736 else if (strcmp ("charge", fields[0]) == 0)
737 strtogauge (fields[2], &charge);
738 }
740 fclose (fh);
741 fh = NULL;
743 battery_submit (plugin_instance, "charge", charge / 1000.0);
744 battery_submit (plugin_instance, "current", current / 1000.0);
745 battery_submit (plugin_instance, "voltage", voltage / 1000.0);
746 }
748 if (i == 0)
749 return (ENOENT);
750 return (0);
751 } /* }}} int read_pmu */
753 static int battery_read (void) /* {{{ */
754 {
755 int status;
757 if (query_statefs)
758 return battery_read_statefs ();
760 DEBUG ("battery plugin: Trying sysfs ...");
761 status = read_sysfs ();
762 if (status == 0)
763 return (0);
765 DEBUG ("battery plugin: Trying acpi ...");
766 status = read_acpi ();
767 if (status == 0)
768 return (0);
770 DEBUG ("battery plugin: Trying pmu ...");
771 status = read_pmu ();
772 if (status == 0)
773 return (0);
775 ERROR ("battery plugin: Add available input methods failed.");
776 return (-1);
777 } /* }}} int battery_read */
778 #endif /* KERNEL_LINUX */
780 static int battery_config (oconfig_item_t *ci)
781 {
782 for (int i = 0; i < ci->children_num; i++)
783 {
784 oconfig_item_t *child = ci->children + i;
786 if (strcasecmp ("ValuesPercentage", child->key) == 0)
787 cf_util_get_boolean (child, &report_percent);
788 else if (strcasecmp ("ReportDegraded", child->key) == 0)
789 cf_util_get_boolean (child, &report_degraded);
790 else if (strcasecmp ("QueryStateFS", child->key) == 0)
791 cf_util_get_boolean (child, &query_statefs);
792 else
793 WARNING ("battery plugin: Ignoring unknown "
794 "configuration option \"%s\".",
795 child->key);
796 }
798 return (0);
799 } /* }}} int battery_config */
801 void module_register (void)
802 {
803 plugin_register_complex_config ("battery", battery_config);
804 plugin_register_read ("battery", battery_read);
805 } /* void module_register */