1 /**
2 * collectd - src/battery.c
3 * Copyright (C) 2006,2007 Florian octo Forster
4 *
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.
8 *
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.
13 *
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
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
26 #if HAVE_MACH_MACH_TYPES_H
27 # include <mach/mach_types.h>
28 #endif
29 #if HAVE_MACH_MACH_INIT_H
30 # include <mach/mach_init.h>
31 #endif
32 #if HAVE_MACH_MACH_ERROR_H
33 # include <mach/mach_error.h>
34 #endif
35 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
36 # include <CoreFoundation/CoreFoundation.h>
37 #endif
38 #if HAVE_IOKIT_IOKITLIB_H
39 # include <IOKit/IOKitLib.h>
40 #endif
41 #if HAVE_IOKIT_IOTYPES_H
42 # include <IOKit/IOTypes.h>
43 #endif
44 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
45 # include <IOKit/ps/IOPowerSources.h>
46 #endif
47 #if HAVE_IOKIT_PS_IOPSKEYS_H
48 # include <IOKit/ps/IOPSKeys.h>
49 #endif
51 #if HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H || KERNEL_LINUX
52 # define BATTERY_HAVE_READ 1
53 #else
54 # define BATTERY_HAVE_READ 0
55 #endif
57 #define INVALID_VALUE 47841.29
59 #if BATTERY_HAVE_READ
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 static int battery_pmu_num = 0;
66 static char *battery_pmu_file = "/proc/pmu/battery_%i";
67 #endif /* KERNEL_LINUX */
69 static int battery_init (void)
70 {
71 #if HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H
72 /* No init neccessary */
73 /* #endif HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H */
75 #elif KERNEL_LINUX
76 int len;
77 char filename[128];
79 for (battery_pmu_num = 0; ; battery_pmu_num++)
80 {
81 len = snprintf (filename, sizeof (filename), battery_pmu_file, battery_pmu_num);
83 if ((len >= sizeof (filename)) || (len < 0))
84 break;
86 if (access (filename, R_OK))
87 break;
88 }
89 #endif /* KERNEL_LINUX */
91 return (0);
92 }
94 static void battery_submit (const char *plugin_instance, const char *type, double value)
95 {
96 value_t values[1];
97 value_list_t vl = VALUE_LIST_INIT;
99 values[0].gauge = value;
101 vl.values = values;
102 vl.values_len = 1;
103 vl.time = time (NULL);
104 strcpy (vl.host, hostname_g);
105 strcpy (vl.plugin, "battery");
106 strcpy (vl.plugin_instance, plugin_instance);
108 plugin_dispatch_values (type, &vl);
109 } /* void battery_submit */
111 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H || HAVE_IOKIT_IOKITLIB_H
112 double dict_get_double (CFDictionaryRef dict, char *key_string)
113 {
114 double val_double;
115 long long val_int;
116 CFNumberRef val_obj;
117 CFStringRef key_obj;
119 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key_string,
120 kCFStringEncodingASCII);
121 if (key_obj == NULL)
122 {
123 DEBUG ("CFStringCreateWithCString (%s) failed.\n", key_string);
124 return (INVALID_VALUE);
125 }
127 if ((val_obj = CFDictionaryGetValue (dict, key_obj)) == NULL)
128 {
129 DEBUG ("CFDictionaryGetValue (%s) failed.", key_string);
130 CFRelease (key_obj);
131 return (INVALID_VALUE);
132 }
133 CFRelease (key_obj);
135 if (CFGetTypeID (val_obj) == CFNumberGetTypeID ())
136 {
137 if (CFNumberIsFloatType (val_obj))
138 {
139 CFNumberGetValue (val_obj,
140 kCFNumberDoubleType,
141 &val_double);
142 }
143 else
144 {
145 CFNumberGetValue (val_obj,
146 kCFNumberLongLongType,
147 &val_int);
148 val_double = val_int;
149 }
150 }
151 else
152 {
153 DEBUG ("CFGetTypeID (val_obj) = %i", (int) CFGetTypeID (val_obj));
154 return (INVALID_VALUE);
155 }
157 return (val_double);
158 }
159 #endif /* HAVE_IOKIT_PS_IOPOWERSOURCES_H || HAVE_IOKIT_IOKITLIB_H */
161 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
162 static void get_via_io_power_sources (double *ret_charge,
163 double *ret_current,
164 double *ret_voltage)
165 {
166 CFTypeRef ps_raw;
167 CFArrayRef ps_array;
168 int ps_array_len;
169 CFDictionaryRef ps_dict;
170 CFTypeRef ps_obj;
172 double temp_double;
173 int i;
175 ps_raw = IOPSCopyPowerSourcesInfo ();
176 ps_array = IOPSCopyPowerSourcesList (ps_raw);
177 ps_array_len = CFArrayGetCount (ps_array);
179 DEBUG ("ps_array_len == %i", ps_array_len);
181 for (i = 0; i < ps_array_len; i++)
182 {
183 ps_obj = CFArrayGetValueAtIndex (ps_array, i);
184 ps_dict = IOPSGetPowerSourceDescription (ps_raw, ps_obj);
186 if (ps_dict == NULL)
187 {
188 DEBUG ("IOPSGetPowerSourceDescription failed.");
189 continue;
190 }
192 if (CFGetTypeID (ps_dict) != CFDictionaryGetTypeID ())
193 {
194 DEBUG ("IOPSGetPowerSourceDescription did not return a CFDictionaryRef");
195 continue;
196 }
198 /* FIXME: Check if this is really an internal battery */
200 if (*ret_charge == INVALID_VALUE)
201 {
202 /* This is the charge in percent. */
203 temp_double = dict_get_double (ps_dict,
204 kIOPSCurrentCapacityKey);
205 if ((temp_double != INVALID_VALUE)
206 && (temp_double >= 0.0)
207 && (temp_double <= 100.0))
208 *ret_charge = temp_double;
209 }
211 if (*ret_current == INVALID_VALUE)
212 {
213 temp_double = dict_get_double (ps_dict,
214 kIOPSCurrentKey);
215 if (temp_double != INVALID_VALUE)
216 *ret_current = temp_double / 1000.0;
217 }
219 if (*ret_voltage == INVALID_VALUE)
220 {
221 temp_double = dict_get_double (ps_dict,
222 kIOPSVoltageKey);
223 if (temp_double != INVALID_VALUE)
224 *ret_voltage = temp_double / 1000.0;
225 }
226 }
228 CFRelease(ps_array);
229 CFRelease(ps_raw);
230 }
231 #endif /* HAVE_IOKIT_PS_IOPOWERSOURCES_H */
233 #if HAVE_IOKIT_IOKITLIB_H
234 static void get_via_generic_iokit (double *ret_charge,
235 double *ret_current,
236 double *ret_voltage)
237 {
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 CFIndex bat_info_arry_pos;
246 CFDictionaryRef bat_info_dict;
248 double temp_double;
250 status = IOServiceGetMatchingServices (kIOMasterPortDefault,
251 IOServiceNameMatching ("battery"),
252 &iterator);
253 if (status != kIOReturnSuccess)
254 {
255 DEBUG ("IOServiceGetMatchingServices failed.");
256 return;
257 }
259 while ((io_obj = IOIteratorNext (iterator)))
260 {
261 status = IORegistryEntryCreateCFProperties (io_obj,
262 (CFMutableDictionaryRef *) &bat_root_dict,
263 kCFAllocatorDefault,
264 kNilOptions);
265 if (status != kIOReturnSuccess)
266 {
267 DEBUG ("IORegistryEntryCreateCFProperties failed.");
268 continue;
269 }
271 bat_info_arry = (CFArrayRef) CFDictionaryGetValue (bat_root_dict,
272 CFSTR ("IOBatteryInfo"));
273 if (bat_info_arry == NULL)
274 {
275 CFRelease (bat_root_dict);
276 continue;
277 }
278 bat_info_arry_len = CFArrayGetCount (bat_info_arry);
280 for (bat_info_arry_pos = 0;
281 bat_info_arry_pos < bat_info_arry_len;
282 bat_info_arry_pos++)
283 {
284 bat_info_dict = (CFDictionaryRef) CFArrayGetValueAtIndex (bat_info_arry, bat_info_arry_pos);
286 if (*ret_charge == INVALID_VALUE)
287 {
288 temp_double = dict_get_double (bat_info_dict,
289 "Capacity");
290 if (temp_double != INVALID_VALUE)
291 *ret_charge = temp_double / 1000.0;
292 }
294 if (*ret_current == INVALID_VALUE)
295 {
296 temp_double = dict_get_double (bat_info_dict,
297 "Current");
298 if (temp_double != INVALID_VALUE)
299 *ret_current = temp_double / 1000.0;
300 }
302 if (*ret_voltage == INVALID_VALUE)
303 {
304 temp_double = dict_get_double (bat_info_dict,
305 "Voltage");
306 if (temp_double != INVALID_VALUE)
307 *ret_voltage = temp_double / 1000.0;
308 }
309 }
311 CFRelease (bat_root_dict);
312 }
314 IOObjectRelease (iterator);
315 }
316 #endif /* HAVE_IOKIT_IOKITLIB_H */
318 static int battery_read (void)
319 {
320 #if HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H
321 double charge = INVALID_VALUE; /* Current charge in Ah */
322 double current = INVALID_VALUE; /* Current in A */
323 double voltage = INVALID_VALUE; /* Voltage in V */
325 double charge_rel = INVALID_VALUE; /* Current charge in percent */
326 double charge_abs = INVALID_VALUE; /* Total capacity */
328 #if HAVE_IOKIT_PS_IOPOWERSOURCES_H
329 get_via_io_power_sources (&charge_rel, ¤t, &voltage);
330 #endif
331 #if HAVE_IOKIT_IOKITLIB_H
332 get_via_generic_iokit (&charge_abs, ¤t, &voltage);
333 #endif
335 if ((charge_rel != INVALID_VALUE) && (charge_abs != INVALID_VALUE))
336 charge = charge_abs * charge_rel / 100.0;
338 if (charge != INVALID_VALUE)
339 battery_submit ("0", "charge", charge);
340 if (current != INVALID_VALUE)
341 battery_submit ("0", "current", current);
342 if (voltage != INVALID_VALUE)
343 battery_submit ("0", "voltage", voltage);
344 /* #endif HAVE_IOKIT_IOKITLIB_H || HAVE_IOKIT_PS_IOPOWERSOURCES_H */
346 #elif KERNEL_LINUX
347 FILE *fh;
348 char buffer[1024];
349 char filename[256];
351 char *fields[8];
352 int numfields;
354 int i;
355 int len;
357 for (i = 0; i < battery_pmu_num; i++)
358 {
359 char batnum_str[256];
360 double current = INVALID_VALUE;
361 double voltage = INVALID_VALUE;
362 double charge = INVALID_VALUE;
363 double *valptr = NULL;
365 len = snprintf (filename, sizeof (filename), battery_pmu_file, i);
366 if ((len >= sizeof (filename)) || (len < 0))
367 continue;
369 len = snprintf (batnum_str, sizeof (batnum_str), "%i", i);
370 if ((len >= sizeof (batnum_str)) || (len < 0))
371 continue;
373 if ((fh = fopen (filename, "r")) == NULL)
374 continue;
376 while (fgets (buffer, sizeof (buffer), fh) != NULL)
377 {
378 numfields = strsplit (buffer, fields, 8);
380 if (numfields < 3)
381 continue;
383 if (strcmp ("current", fields[0]) == 0)
384 valptr = ¤t;
385 else if (strcmp ("voltage", fields[0]) == 0)
386 valptr = &voltage;
387 else if (strcmp ("charge", fields[0]) == 0)
388 valptr = &charge;
389 else
390 valptr = NULL;
392 if (valptr != NULL)
393 {
394 char *endptr;
396 endptr = NULL;
397 errno = 0;
399 *valptr = strtod (fields[2], &endptr) / 1000.0;
401 if ((fields[2] == endptr) || (errno != 0))
402 *valptr = INVALID_VALUE;
403 }
404 }
406 fclose (fh);
407 fh = NULL;
409 if (charge != INVALID_VALUE)
410 battery_submit ("0", "charge", charge);
411 if (current != INVALID_VALUE)
412 battery_submit ("0", "current", current);
413 if (voltage != INVALID_VALUE)
414 battery_submit ("0", "voltage", voltage);
415 }
417 if (access ("/proc/acpi/battery", R_OK | X_OK) == 0)
418 {
419 double current = INVALID_VALUE;
420 double voltage = INVALID_VALUE;
421 double charge = INVALID_VALUE;
422 double *valptr = NULL;
423 int charging = 0;
425 struct dirent *ent;
426 DIR *dh;
428 if ((dh = opendir ("/proc/acpi/battery")) == NULL)
429 {
430 char errbuf[1024];
431 ERROR ("Cannot open `/proc/acpi/battery': %s",
432 sstrerror (errno, errbuf, sizeof (errbuf)));
433 return (-1);
434 }
436 while ((ent = readdir (dh)) != NULL)
437 {
438 if (ent->d_name[0] == '.')
439 continue;
441 len = snprintf (filename, sizeof (filename),
442 "/proc/acpi/battery/%s/state",
443 ent->d_name);
444 if ((len >= sizeof (filename)) || (len < 0))
445 continue;
447 if ((fh = fopen (filename, "r")) == NULL)
448 {
449 char errbuf[1024];
450 ERROR ("Cannot open `%s': %s", filename,
451 sstrerror (errno, errbuf,
452 sizeof (errbuf)));
453 continue;
454 }
456 /*
457 * [11:00] <@tokkee> $ cat /proc/acpi/battery/BAT1/state
458 * [11:00] <@tokkee> present: yes
459 * [11:00] <@tokkee> capacity state: ok
460 * [11:00] <@tokkee> charging state: charging
461 * [11:00] <@tokkee> present rate: 1724 mA
462 * [11:00] <@tokkee> remaining capacity: 4136 mAh
463 * [11:00] <@tokkee> present voltage: 12428 mV
464 */
465 while (fgets (buffer, sizeof (buffer), fh) != NULL)
466 {
467 numfields = strsplit (buffer, fields, 8);
469 if (numfields < 3)
470 continue;
472 if ((strcmp (fields[0], "present") == 0)
473 && (strcmp (fields[1], "rate:") == 0))
474 valptr = ¤t;
475 else if ((strcmp (fields[0], "remaining") == 0)
476 && (strcmp (fields[1], "capacity:") == 0))
477 valptr = &charge;
478 else if ((strcmp (fields[0], "present") == 0)
479 && (strcmp (fields[1], "voltage:") == 0))
480 valptr = &voltage;
481 else
482 valptr = NULL;
484 if ((strcmp (fields[0], "charging") == 0)
485 && (strcmp (fields[1], "state:") == 0))
486 {
487 if (strcmp (fields[2], "charging") == 0)
488 charging = 1;
489 else
490 charging = 0;
491 }
493 if (valptr != NULL)
494 {
495 char *endptr;
497 endptr = NULL;
498 errno = 0;
500 *valptr = strtod (fields[2], &endptr) / 1000.0;
502 if ((fields[2] == endptr) || (errno != 0))
503 *valptr = INVALID_VALUE;
504 }
505 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
507 fclose (fh);
509 if ((current != INVALID_VALUE) && (charging == 0))
510 current *= -1;
512 if (charge != INVALID_VALUE)
513 battery_submit ("0", "charge", charge);
514 if (current != INVALID_VALUE)
515 battery_submit ("0", "current", current);
516 if (voltage != INVALID_VALUE)
517 battery_submit ("0", "voltage", voltage);
518 }
520 closedir (dh);
521 }
522 #endif /* KERNEL_LINUX */
524 return (0);
525 }
526 #endif /* BATTERY_HAVE_READ */
528 void module_register (void)
529 {
530 #if BATTERY_HAVE_READ
531 plugin_register_init ("battery", battery_init);
532 plugin_register_read ("battery", battery_read);
533 #endif /* BATTERY_HAVE_READ */
534 } /* void module_register */