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 static _Bool report_percent = 0;
73 static _Bool report_degraded = 0;
75 static void battery_submit2 (char const *plugin_instance, /* {{{ */
76 char const *type, char const *type_instance, gauge_t value)
77 {
78 value_t values[1];
79 value_list_t vl = VALUE_LIST_INIT;
81 values[0].gauge = value;
83 vl.values = values;
84 vl.values_len = 1;
85 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
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 {
98 battery_submit2 (plugin_instance, type, NULL, value);
99 } /* }}} void battery_submit */
101 static void submit_capacity (char const *plugin_instance, /* {{{ */
102 gauge_t capacity_charged,
103 gauge_t capacity_full,
104 gauge_t capacity_design)
105 {
106 if (report_percent && (capacity_charged > capacity_full))
107 return;
108 if (report_degraded && (capacity_full > capacity_design))
109 return;
111 if (report_percent)
112 {
113 gauge_t capacity_max;
115 if (report_degraded)
116 capacity_max = capacity_design;
117 else
118 capacity_max = capacity_full;
120 battery_submit2 (plugin_instance, "percent", "charged",
121 100.0 * capacity_charged / capacity_max);
122 battery_submit2 (plugin_instance, "percent", "discharged",
123 100.0 * (capacity_full - capacity_charged) / capacity_max);
125 if (report_degraded)
126 battery_submit2 (plugin_instance, "percent", "degraded",
127 100.0 * (capacity_design - capacity_full) / capacity_max);
128 }
129 else if (report_degraded) /* && !report_percent */
130 {
131 battery_submit2 (plugin_instance, "capacity", "charged",
132 capacity_charged);
133 battery_submit2 (plugin_instance, "capacity", "discharged",
134 (capacity_full - capacity_charged));
135 battery_submit2 (plugin_instance, "capacity", "degraded",
136 (capacity_design - capacity_full));
137 }
138 else /* !report_percent && !report_degraded */
139 {
140 battery_submit (plugin_instance, "capacity", capacity_charged);
141 }
142 } /* }}} void submit_capacity */
144 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H || HAVE_IOKIT_IOKITLIB_H
145 static double dict_get_double (CFDictionaryRef dict, const char *key_string) /* {{{ */
146 {
147 double val_double;
148 long long val_int;
149 CFNumberRef val_obj;
150 CFStringRef key_obj;
152 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key_string,
153 kCFStringEncodingASCII);
154 if (key_obj == NULL)
155 {
156 DEBUG ("CFStringCreateWithCString (%s) failed.\n", key_string);
157 return (NAN);
158 }
160 if ((val_obj = CFDictionaryGetValue (dict, key_obj)) == NULL)
161 {
162 DEBUG ("CFDictionaryGetValue (%s) failed.", key_string);
163 CFRelease (key_obj);
164 return (NAN);
165 }
166 CFRelease (key_obj);
168 if (CFGetTypeID (val_obj) == CFNumberGetTypeID ())
169 {
170 if (CFNumberIsFloatType (val_obj))
171 {
172 CFNumberGetValue (val_obj,
173 kCFNumberDoubleType,
174 &val_double);
175 }
176 else
177 {
178 CFNumberGetValue (val_obj,
179 kCFNumberLongLongType,
180 &val_int);
181 val_double = val_int;
182 }
183 }
184 else
185 {
186 DEBUG ("CFGetTypeID (val_obj) = %i", (int) CFGetTypeID (val_obj));
187 return (NAN);
188 }
190 return (val_double);
191 } /* }}} double dict_get_double */
193 # if HAVE_IOKIT_PS_IOPOWERSOURCES_H
194 static void get_via_io_power_sources (double *ret_charge, /* {{{ */
195 double *ret_current,
196 double *ret_voltage)
197 {
198 CFTypeRef ps_raw;
199 CFArrayRef ps_array;
200 int ps_array_len;
201 CFDictionaryRef ps_dict;
202 CFTypeRef ps_obj;
204 double temp_double;
206 ps_raw = IOPSCopyPowerSourcesInfo ();
207 ps_array = IOPSCopyPowerSourcesList (ps_raw);
208 ps_array_len = CFArrayGetCount (ps_array);
210 DEBUG ("ps_array_len == %i", ps_array_len);
212 for (int i = 0; i < ps_array_len; i++)
213 {
214 ps_obj = CFArrayGetValueAtIndex (ps_array, i);
215 ps_dict = IOPSGetPowerSourceDescription (ps_raw, ps_obj);
217 if (ps_dict == NULL)
218 {
219 DEBUG ("IOPSGetPowerSourceDescription failed.");
220 continue;
221 }
223 if (CFGetTypeID (ps_dict) != CFDictionaryGetTypeID ())
224 {
225 DEBUG ("IOPSGetPowerSourceDescription did not return a CFDictionaryRef");
226 continue;
227 }
229 /* FIXME: Check if this is really an internal battery */
231 if (isnan (*ret_charge))
232 {
233 /* This is the charge in percent. */
234 temp_double = dict_get_double (ps_dict,
235 kIOPSCurrentCapacityKey);
236 if (!isnan ((temp_double))
237 && (temp_double >= 0.0)
238 && (temp_double <= 100.0))
239 *ret_charge = temp_double;
240 }
242 if (isnan (*ret_current))
243 {
244 temp_double = dict_get_double (ps_dict,
245 kIOPSCurrentKey);
246 if (!isnan (temp_double))
247 *ret_current = temp_double / 1000.0;
248 }
250 if (isnan (*ret_voltage))
251 {
252 temp_double = dict_get_double (ps_dict,
253 kIOPSVoltageKey);
254 if (!isnan (temp_double))
255 *ret_voltage = temp_double / 1000.0;
256 }
257 }
259 CFRelease(ps_array);
260 CFRelease(ps_raw);
261 } /* }}} void get_via_io_power_sources */
262 # endif /* HAVE_IOKIT_PS_IOPOWERSOURCES_H */
264 # if HAVE_IOKIT_IOKITLIB_H
265 static void get_via_generic_iokit (double *ret_capacity_full, /* {{{ */
266 double *ret_capacity_design,
267 double *ret_current,
268 double *ret_voltage)
269 {
270 kern_return_t status;
271 io_iterator_t iterator;
272 io_object_t io_obj;
274 CFDictionaryRef bat_root_dict;
275 CFArrayRef bat_info_arry;
276 CFIndex bat_info_arry_len;
277 CFDictionaryRef bat_info_dict;
279 double temp_double;
281 status = IOServiceGetMatchingServices (kIOMasterPortDefault,
282 IOServiceNameMatching ("battery"),
283 &iterator);
284 if (status != kIOReturnSuccess)
285 {
286 DEBUG ("IOServiceGetMatchingServices failed.");
287 return;
288 }
290 while ((io_obj = IOIteratorNext (iterator)))
291 {
292 status = IORegistryEntryCreateCFProperties (io_obj,
293 (CFMutableDictionaryRef *) &bat_root_dict,
294 kCFAllocatorDefault,
295 kNilOptions);
296 if (status != kIOReturnSuccess)
297 {
298 DEBUG ("IORegistryEntryCreateCFProperties failed.");
299 continue;
300 }
302 bat_info_arry = (CFArrayRef) CFDictionaryGetValue (bat_root_dict,
303 CFSTR ("IOBatteryInfo"));
304 if (bat_info_arry == NULL)
305 {
306 CFRelease (bat_root_dict);
307 continue;
308 }
309 bat_info_arry_len = CFArrayGetCount (bat_info_arry);
311 for (CFIndex bat_info_arry_pos = 0;
312 bat_info_arry_pos < bat_info_arry_len;
313 bat_info_arry_pos++)
314 {
315 bat_info_dict = (CFDictionaryRef) CFArrayGetValueAtIndex (bat_info_arry, bat_info_arry_pos);
317 if (isnan (*ret_capacity_full))
318 {
319 temp_double = dict_get_double (bat_info_dict, "Capacity");
320 *ret_capacity_full = temp_double / 1000.0;
321 }
323 if (isnan (*ret_capacity_design))
324 {
325 temp_double = dict_get_double (bat_info_dict, "AbsoluteMaxCapacity");
326 *ret_capacity_design = temp_double / 1000.0;
327 }
329 if (isnan (*ret_current))
330 {
331 temp_double = dict_get_double (bat_info_dict, "Current");
332 *ret_current = temp_double / 1000.0;
333 }
335 if (isnan (*ret_voltage))
336 {
337 temp_double = dict_get_double (bat_info_dict, "Voltage");
338 *ret_voltage = temp_double / 1000.0;
339 }
340 }
342 CFRelease (bat_root_dict);
343 }
345 IOObjectRelease (iterator);
346 } /* }}} void get_via_generic_iokit */
347 # endif /* HAVE_IOKIT_IOKITLIB_H */
349 static int battery_read (void) /* {{{ */
350 {
351 gauge_t current = NAN; /* Current in A */
352 gauge_t voltage = NAN; /* Voltage in V */
354 /* We only get the charged capacity as a percentage from
355 * IOPowerSources. IOKit, on the other hand, only reports the full
356 * capacity. We use the two to calculate the current charged capacity. */
357 gauge_t charge_rel = NAN; /* Current charge in percent */
358 gauge_t capacity_charged; /* Charged capacity */
359 gauge_t capacity_full = NAN; /* Total capacity */
360 gauge_t capacity_design = NAN; /* Full design capacity */
362 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
363 get_via_io_power_sources (&charge_rel, ¤t, &voltage);
364 #endif
365 #if HAVE_IOKIT_IOKITLIB_H
366 get_via_generic_iokit (&capacity_full, &capacity_design, ¤t, &voltage);
367 #endif
369 capacity_charged = charge_rel * capacity_full / 100.0;
370 submit_capacity ("0", capacity_charged, capacity_full, capacity_design);
372 if (!isnan (current))
373 battery_submit ("0", "current", current);
374 if (!isnan (voltage))
375 battery_submit ("0", "voltage", voltage);
377 return (0);
378 } /* }}} int battery_read */
379 /* #endif HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H */
381 #elif KERNEL_LINUX
382 /* Reads a file which contains only a number (and optionally a trailing
383 * newline) and parses that number. */
384 static int sysfs_file_to_buffer(char const *dir, /* {{{ */
385 char const *power_supply,
386 char const *basename,
387 char *buffer, size_t buffer_size)
388 {
389 int status;
390 FILE *fp;
391 char filename[PATH_MAX];
393 ssnprintf (filename, sizeof (filename), "%s/%s/%s",
394 dir, power_supply, basename);
396 /* No file isn't the end of the world -- not every system will be
397 * reporting the same set of statistics */
398 if (access (filename, R_OK) != 0)
399 return ENOENT;
401 fp = fopen (filename, "r");
402 if (fp == NULL)
403 {
404 status = errno;
405 if (status != ENOENT)
406 {
407 char errbuf[1024];
408 WARNING ("battery plugin: fopen (%s) failed: %s", filename,
409 sstrerror (status, errbuf, sizeof (errbuf)));
410 }
411 return status;
412 }
414 if (fgets (buffer, buffer_size, fp) == NULL)
415 {
416 status = errno;
417 if (status != ENODEV)
418 {
419 char errbuf[1024];
420 WARNING ("battery plugin: fgets (%s) failed: %s", filename,
421 sstrerror (status, errbuf, sizeof (errbuf)));
422 }
423 fclose (fp);
424 return status;
425 }
427 strstripnewline (buffer);
429 fclose (fp);
430 return 0;
431 } /* }}} int sysfs_file_to_buffer */
433 /* Reads a file which contains only a number (and optionally a trailing
434 * newline) and parses that number. */
435 static int sysfs_file_to_gauge(char const *dir, /* {{{ */
436 char const *power_supply,
437 char const *basename, gauge_t *ret_value)
438 {
439 int status;
440 char buffer[32] = "";
442 status = sysfs_file_to_buffer (dir, power_supply, basename, buffer, sizeof (buffer));
443 if (status != 0)
444 return (status);
446 return (strtogauge (buffer, ret_value));
447 } /* }}} sysfs_file_to_gauge */
449 static int read_sysfs_capacity (char const *dir, /* {{{ */
450 char const *power_supply,
451 char const *plugin_instance)
452 {
453 gauge_t capacity_charged = NAN;
454 gauge_t capacity_full = NAN;
455 gauge_t capacity_design = NAN;
456 int status;
458 status = sysfs_file_to_gauge (dir, power_supply, "energy_now", &capacity_charged);
459 if (status != 0)
460 return (status);
462 status = sysfs_file_to_gauge (dir, power_supply, "energy_full", &capacity_full);
463 if (status != 0)
464 return (status);
466 status = sysfs_file_to_gauge (dir, power_supply, "energy_full_design", &capacity_design);
467 if (status != 0)
468 return (status);
470 submit_capacity (plugin_instance,
471 capacity_charged * SYSFS_FACTOR,
472 capacity_full * SYSFS_FACTOR,
473 capacity_design * SYSFS_FACTOR);
474 return (0);
475 } /* }}} int read_sysfs_capacity */
477 static int read_sysfs_callback (char const *dir, /* {{{ */
478 char const *power_supply,
479 void *user_data)
480 {
481 int *battery_index = user_data;
483 char const *plugin_instance;
484 char buffer[32];
485 gauge_t v = NAN;
486 _Bool discharging = 0;
487 int status;
489 /* Ignore non-battery directories, such as AC power. */
490 status = sysfs_file_to_buffer (dir, power_supply, "type", buffer, sizeof (buffer));
491 if (status != 0)
492 return (0);
493 if (strcasecmp ("Battery", buffer) != 0)
494 return (0);
496 (void) sysfs_file_to_buffer (dir, power_supply, "status", buffer, sizeof (buffer));
497 if (strcasecmp ("Discharging", buffer) == 0)
498 discharging = 1;
500 /* FIXME: This is a dirty hack for backwards compatibility: The battery
501 * plugin, for a very long time, has had the plugin_instance
502 * hard-coded to "0". So, to keep backwards compatibility, we'll use
503 * "0" for the first battery we find and the power_supply name for all
504 * following. This should be reverted in a future major version. */
505 plugin_instance = (*battery_index == 0) ? "0" : power_supply;
506 (*battery_index)++;
508 read_sysfs_capacity (dir, power_supply, plugin_instance);
510 if (sysfs_file_to_gauge (dir, power_supply, "power_now", &v) == 0)
511 {
512 if (discharging)
513 v *= -1.0;
514 battery_submit (plugin_instance, "power", v * SYSFS_FACTOR);
515 }
516 if (sysfs_file_to_gauge (dir, power_supply, "current_now", &v) == 0)
517 {
518 if (discharging)
519 v *= -1.0;
520 battery_submit (plugin_instance, "current", v * SYSFS_FACTOR);
521 }
523 if (sysfs_file_to_gauge (dir, power_supply, "voltage_now", &v) == 0)
524 battery_submit (plugin_instance, "voltage", v * SYSFS_FACTOR);
526 return (0);
527 } /* }}} int read_sysfs_callback */
529 static int read_sysfs (void) /* {{{ */
530 {
531 int status;
532 int battery_counter = 0;
534 if (access (SYSFS_PATH, R_OK) != 0)
535 return (ENOENT);
537 status = walk_directory (SYSFS_PATH, read_sysfs_callback,
538 /* user_data = */ &battery_counter,
539 /* include hidden */ 0);
540 return (status);
541 } /* }}} int read_sysfs */
543 static int read_acpi_full_capacity (char const *dir, /* {{{ */
544 char const *power_supply,
545 gauge_t *ret_capacity_full,
546 gauge_t *ret_capacity_design)
548 {
549 char filename[PATH_MAX];
550 char buffer[1024];
552 FILE *fh;
554 ssnprintf (filename, sizeof (filename), "%s/%s/info", dir, power_supply);
555 fh = fopen (filename, "r");
556 if (fh == NULL)
557 return (errno);
559 /* last full capacity: 40090 mWh */
560 while (fgets (buffer, sizeof (buffer), fh) != NULL)
561 {
562 gauge_t *value_ptr;
563 int fields_num;
564 char *fields[8];
565 int index;
567 if (strncmp ("last full capacity:", buffer, strlen ("last full capacity:")) == 0)
568 {
569 value_ptr = ret_capacity_full;
570 index = 3;
571 }
572 else if (strncmp ("design capacity:", buffer, strlen ("design capacity:")) == 0)
573 {
574 value_ptr = ret_capacity_design;
575 index = 2;
576 }
577 else
578 {
579 continue;
580 }
582 fields_num = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
583 if (fields_num <= index)
584 continue;
586 strtogauge (fields[index], value_ptr);
587 }
589 fclose (fh);
590 return (0);
591 } /* }}} int read_acpi_full_capacity */
593 static int read_acpi_callback (char const *dir, /* {{{ */
594 char const *power_supply,
595 void *user_data)
596 {
597 int *battery_index = user_data;
599 gauge_t power = NAN;
600 gauge_t voltage = NAN;
601 gauge_t capacity_charged = NAN;
602 gauge_t capacity_full = NAN;
603 gauge_t capacity_design = NAN;
604 _Bool charging = 0;
605 _Bool is_current = 0;
607 char const *plugin_instance;
608 char filename[PATH_MAX];
609 char buffer[1024];
611 FILE *fh;
613 ssnprintf (filename, sizeof (filename), "%s/%s/state", dir, power_supply);
614 fh = fopen (filename, "r");
615 if (fh == NULL)
616 {
617 if ((errno == EAGAIN) || (errno == EINTR) || (errno == ENOENT))
618 return (0);
619 else
620 return (errno);
621 }
623 /*
624 * [11:00] <@tokkee> $ cat /proc/acpi/battery/BAT1/state
625 * [11:00] <@tokkee> present: yes
626 * [11:00] <@tokkee> capacity state: ok
627 * [11:00] <@tokkee> charging state: charging
628 * [11:00] <@tokkee> present rate: 1724 mA
629 * [11:00] <@tokkee> remaining capacity: 4136 mAh
630 * [11:00] <@tokkee> present voltage: 12428 mV
631 */
632 while (fgets (buffer, sizeof (buffer), fh) != NULL)
633 {
634 char *fields[8];
635 int numfields;
637 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
638 if (numfields < 3)
639 continue;
641 if ((strcmp (fields[0], "charging") == 0)
642 && (strcmp (fields[1], "state:") == 0))
643 {
644 if (strcmp (fields[2], "charging") == 0)
645 charging = 1;
646 else
647 charging = 0;
648 continue;
649 }
651 /* The unit of "present rate" depends on the battery. Modern
652 * batteries export power (watts), older batteries (used to)
653 * export current (amperes). We check the fourth column and try
654 * to find old batteries this way. */
655 if ((strcmp (fields[0], "present") == 0)
656 && (strcmp (fields[1], "rate:") == 0))
657 {
658 strtogauge (fields[2], &power);
660 if ((numfields >= 4) && (strcmp ("mA", fields[3]) == 0))
661 is_current = 1;
662 }
663 else if ((strcmp (fields[0], "remaining") == 0)
664 && (strcmp (fields[1], "capacity:") == 0))
665 strtogauge (fields[2], &capacity_charged);
666 else if ((strcmp (fields[0], "present") == 0)
667 && (strcmp (fields[1], "voltage:") == 0))
668 strtogauge (fields[2], &voltage);
669 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
671 fclose (fh);
673 if (!charging)
674 power *= -1.0;
676 /* FIXME: This is a dirty hack for backwards compatibility: The battery
677 * plugin, for a very long time, has had the plugin_instance
678 * hard-coded to "0". So, to keep backwards compatibility, we'll use
679 * "0" for the first battery we find and the power_supply name for all
680 * following. This should be reverted in a future major version. */
681 plugin_instance = (*battery_index == 0) ? "0" : power_supply;
682 (*battery_index)++;
684 read_acpi_full_capacity (dir, power_supply, &capacity_full, &capacity_design);
686 submit_capacity (plugin_instance,
687 capacity_charged * PROC_ACPI_FACTOR,
688 capacity_full * PROC_ACPI_FACTOR,
689 capacity_design * PROC_ACPI_FACTOR);
691 battery_submit (plugin_instance,
692 is_current ? "current" : "power",
693 power * PROC_ACPI_FACTOR);
694 battery_submit (plugin_instance, "voltage", voltage * PROC_ACPI_FACTOR);
696 return 0;
697 } /* }}} int read_acpi_callback */
699 static int read_acpi (void) /* {{{ */
700 {
701 int status;
702 int battery_counter = 0;
704 if (access (PROC_ACPI_PATH, R_OK) != 0)
705 return (ENOENT);
707 status = walk_directory (PROC_ACPI_PATH, read_acpi_callback,
708 /* user_data = */ &battery_counter,
709 /* include hidden */ 0);
710 return (status);
711 } /* }}} int read_acpi */
713 static int read_pmu (void) /* {{{ */
714 {
715 int i = 0;
716 /* The upper limit here is just a safeguard. If there is a system with
717 * more than 100 batteries, this can easily be increased. */
718 for (; i < 100; i++)
719 {
720 FILE *fh;
722 char buffer[1024];
723 char filename[PATH_MAX];
724 char plugin_instance[DATA_MAX_NAME_LEN];
726 gauge_t current = NAN;
727 gauge_t voltage = NAN;
728 gauge_t charge = NAN;
730 ssnprintf (filename, sizeof (filename), PROC_PMU_PATH_FORMAT, i);
731 if (access (filename, R_OK) != 0)
732 break;
734 ssnprintf (plugin_instance, sizeof (plugin_instance), "%i", i);
736 fh = fopen (filename, "r");
737 if (fh == NULL)
738 {
739 if (errno == ENOENT)
740 break;
741 else if ((errno == EAGAIN) || (errno == EINTR))
742 continue;
743 else
744 return (errno);
745 }
747 while (fgets (buffer, sizeof (buffer), fh) != NULL)
748 {
749 char *fields[8];
750 int numfields;
752 numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
753 if (numfields < 3)
754 continue;
756 if (strcmp ("current", fields[0]) == 0)
757 strtogauge (fields[2], ¤t);
758 else if (strcmp ("voltage", fields[0]) == 0)
759 strtogauge (fields[2], &voltage);
760 else if (strcmp ("charge", fields[0]) == 0)
761 strtogauge (fields[2], &charge);
762 }
764 fclose (fh);
765 fh = NULL;
767 battery_submit (plugin_instance, "charge", charge / 1000.0);
768 battery_submit (plugin_instance, "current", current / 1000.0);
769 battery_submit (plugin_instance, "voltage", voltage / 1000.0);
770 }
772 if (i == 0)
773 return (ENOENT);
774 return (0);
775 } /* }}} int read_pmu */
777 static int battery_read (void) /* {{{ */
778 {
779 int status;
781 DEBUG ("battery plugin: Trying sysfs ...");
782 status = read_sysfs ();
783 if (status == 0)
784 return (0);
786 DEBUG ("battery plugin: Trying acpi ...");
787 status = read_acpi ();
788 if (status == 0)
789 return (0);
791 DEBUG ("battery plugin: Trying pmu ...");
792 status = read_pmu ();
793 if (status == 0)
794 return (0);
796 ERROR ("battery plugin: Add available input methods failed.");
797 return (-1);
798 } /* }}} int battery_read */
799 #endif /* KERNEL_LINUX */
801 static int battery_config (oconfig_item_t *ci)
802 {
803 for (int i = 0; i < ci->children_num; i++)
804 {
805 oconfig_item_t *child = ci->children + i;
807 if (strcasecmp ("ValuesPercentage", child->key) == 0)
808 cf_util_get_boolean (child, &report_percent);
809 else if (strcasecmp ("ReportDegraded", child->key) == 0)
810 cf_util_get_boolean (child, &report_degraded);
811 else
812 WARNING ("battery plugin: Ignoring unknown "
813 "configuration option \"%s\".",
814 child->key);
815 }
817 return (0);
818 } /* }}} int battery_config */
820 void module_register (void)
821 {
822 plugin_register_complex_config ("battery", battery_config);
823 plugin_register_read ("battery", battery_read);
824 } /* void module_register */