1 // vim:ts=4:sw=4:expandtab
7 #include <yajl/yajl_gen.h>
8 #include <yajl/yajl_version.h>
12 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
13 #include <sys/types.h>
14 #include <sys/sysctl.h>
15 #include <dev/acpica/acpiio.h>
18 #if defined(__OpenBSD__)
19 #include <sys/types.h>
20 #include <sys/ioctl.h>
21 #include <sys/fcntl.h>
22 #include <machine/apmvar.h>
25 #if defined(__NetBSD__)
27 #include <prop/proplib.h>
28 #include <sys/envsys.h>
33 int seconds_remaining;
34 float percentage_remaining;
35 charging_status_t status;
39 * Estimate the number of seconds remaining in state 'status'.
41 * Assumes a constant (dis)charge rate.
43 static int seconds_remaining_from_rate(charging_status_t status, float full_design, float remaining, float present_rate) {
44 if (status == CS_CHARGING)
45 return 3600.0 * (full_design - remaining) / present_rate;
46 else if (status == CS_DISCHARGING)
47 return 3600.0 * remaining / present_rate;
52 static bool slurp_battery_info(struct battery_info *batt_info, yajl_gen json_gen, char *buffer, int number, const char *path, const char *format_down, bool last_full_capacity) {
54 const char *walk, *last;
55 char *outwalk = buffer;
56 bool watt_as_unit = false;
63 sprintf(batpath, path, number);
66 if (!slurp(batpath, buf, sizeof(buf))) {
67 OUTPUT_FULL_TEXT(format_down);
71 for (walk = buf, last = buf; (walk - buf) < 1024; walk++) {
80 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW")) {
82 remaining = atoi(walk + 1);
83 } else if (BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW")) {
85 remaining = atoi(walk + 1);
86 } else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
87 batt_info->present_rate = abs(atoi(walk + 1));
88 else if (BEGINS_WITH(last, "POWER_SUPPLY_VOLTAGE_NOW"))
89 voltage = abs(atoi(walk + 1));
90 /* on some systems POWER_SUPPLY_POWER_NOW does not exist, but actually
91 * it is the same as POWER_SUPPLY_CURRENT_NOW but with μWh as
92 * unit instead of μAh. We will calculate it as we need it
94 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
95 batt_info->present_rate = abs(atoi(walk + 1));
96 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
97 batt_info->status = CS_CHARGING;
98 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
99 batt_info->status = CS_FULL;
100 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Discharging"))
101 batt_info->status = CS_DISCHARGING;
102 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS="))
103 batt_info->status = CS_UNKNOWN;
105 /* The only thing left is the full capacity */
106 if (last_full_capacity) {
107 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
108 !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
111 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
112 !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
116 full_design = atoi(walk + 1);
120 /* the difference between POWER_SUPPLY_ENERGY_NOW and
121 * POWER_SUPPLY_CHARGE_NOW is the unit of measurement. The energy is
122 * given in mWh, the charge in mAh. So calculate every value given in
125 batt_info->present_rate = (((float)voltage / 1000.0) * ((float)batt_info->present_rate / 1000.0));
128 remaining = (((float)voltage / 1000.0) * ((float)remaining / 1000.0));
129 full_design = (((float)voltage / 1000.0) * ((float)full_design / 1000.0));
133 if ((full_design == -1) || (remaining == -1)) {
134 OUTPUT_FULL_TEXT(format_down);
138 batt_info->percentage_remaining = (((float)remaining / (float)full_design) * 100);
139 /* Some batteries report POWER_SUPPLY_CHARGE_NOW=<full_design> when fully
140 * charged, even though that’s plainly wrong. For people who chose to see
141 * the percentage calculated based on the last full capacity, we clamp the
142 * value to 100%, as that makes more sense.
143 * See http://bugs.debian.org/785398 */
144 if (last_full_capacity && batt_info->percentage_remaining > 100) {
145 batt_info->percentage_remaining = 100;
148 if (batt_info->present_rate > 0 && batt_info->status != CS_FULL) {
149 batt_info->seconds_remaining = seconds_remaining_from_rate(batt_info->status, full_design, remaining, batt_info->present_rate);
151 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
154 size_t sysctl_size = sizeof(sysctl_rslt);
156 if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
157 OUTPUT_FULL_TEXT(format_down);
161 batt_info->percentage_remaining = sysctl_rslt;
162 if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
163 OUTPUT_FULL_TEXT(format_down);
167 batt_info->seconds_remaining = sysctl_rslt * 60;
168 if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
169 OUTPUT_FULL_TEXT(format_down);
174 if (state == 0 && batt_info->percentage_remaining == 100)
175 batt_info->status = CS_FULL;
176 else if ((state & ACPI_BATT_STAT_CHARGING) && batt_info->percentage_remaining < 100)
177 batt_info->status = CS_CHARGING;
179 batt_info->status = CS_DISCHARGING;
181 full_design = sysctl_rslt;
182 #elif defined(__OpenBSD__)
184 * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
185 * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
186 * probing acpi(4) devices.
188 struct apm_power_info apm_info;
191 apm_fd = open("/dev/apm", O_RDONLY);
193 OUTPUT_FULL_TEXT("can't open /dev/apm");
196 if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
197 OUTPUT_FULL_TEXT("can't read power info");
201 /* Don't bother to go further if there's no battery present. */
202 if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
203 (apm_info.battery_state == APM_BATT_UNKNOWN)) {
204 OUTPUT_FULL_TEXT(format_down);
208 switch (apm_info.ac_state) {
210 batt_info->status = CS_DISCHARGING;
213 batt_info->status = CS_CHARGING;
216 /* If we don't know what's going on, just assume we're discharging. */
217 batt_info->status = CS_DISCHARGING;
221 batt_info->percentage_remaining = apm_info.battery_life;
223 /* Can't give a meaningful value for remaining minutes if we're charging. */
224 if (batt_info->status != CS_CHARGING) {
225 batt_info->seconds_remaining = apm_info.minutes_left * 60;
227 #elif defined(__NetBSD__)
229 * Using envsys(4) via sysmon(4).
231 int fd, rval, last_full_cap;
232 bool is_found = false;
234 bool is_full = false;
236 prop_dictionary_t dict;
238 prop_object_iterator_t iter;
239 prop_object_iterator_t iter2;
240 prop_object_t obj, obj2, obj3, obj4, obj5;
242 asprintf(&sensor_desc, "acpibat%d", number);
244 fd = open("/dev/sysmon", O_RDONLY);
246 OUTPUT_FULL_TEXT("can't open /dev/sysmon");
250 rval = prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &dict);
256 if (prop_dictionary_count(dict) == 0) {
257 prop_object_release(dict);
262 iter = prop_dictionary_iterator(dict);
264 prop_object_release(dict);
268 /* iterate over the dictionary returned by the kernel */
269 while ((obj = prop_object_iterator_next(iter)) != NULL) {
270 /* skip this dict if it's not what we're looking for */
271 if ((strlen(prop_dictionary_keysym_cstring_nocopy(obj)) == strlen(sensor_desc)) &&
272 (strncmp(sensor_desc,
273 prop_dictionary_keysym_cstring_nocopy(obj),
274 strlen(sensor_desc)) != 0))
279 array = prop_dictionary_get_keysym(dict, obj);
280 if (prop_object_type(array) != PROP_TYPE_ARRAY) {
281 prop_object_iterator_release(iter);
282 prop_object_release(dict);
287 iter2 = prop_array_iterator(array);
289 prop_object_iterator_release(iter);
290 prop_object_release(dict);
295 /* iterate over array of dicts specific to target battery */
296 while ((obj2 = prop_object_iterator_next(iter2)) != NULL) {
297 obj3 = prop_dictionary_get(obj2, "description");
300 strlen(prop_string_cstring_nocopy(obj3)) == 8 &&
302 prop_string_cstring_nocopy(obj3),
304 obj3 = prop_dictionary_get(obj2, "cur-value");
306 if (prop_number_integer_value(obj3))
307 batt_info->status = CS_CHARGING;
309 batt_info->status = CS_DISCHARGING;
315 strlen(prop_string_cstring_nocopy(obj3)) == 6 &&
317 prop_string_cstring_nocopy(obj3),
319 obj3 = prop_dictionary_get(obj2, "cur-value");
320 obj4 = prop_dictionary_get(obj2, "max-value");
321 obj5 = prop_dictionary_get(obj2, "type");
323 remaining = prop_number_integer_value(obj3);
324 full_design = prop_number_integer_value(obj4);
326 if (remaining == full_design)
329 if (strncmp("Ampere hour",
330 prop_string_cstring_nocopy(obj5),
332 watt_as_unit = false;
340 strlen(prop_string_cstring_nocopy(obj3)) == 14 &&
341 strncmp("discharge rate",
342 prop_string_cstring_nocopy(obj3),
344 obj3 = prop_dictionary_get(obj2, "cur-value");
345 batt_info->present_rate = prop_number_integer_value(obj3);
350 strlen(prop_string_cstring_nocopy(obj3)) == 13 &&
351 strncmp("last full cap",
352 prop_string_cstring_nocopy(obj3),
354 obj3 = prop_dictionary_get(obj2, "cur-value");
355 last_full_cap = prop_number_integer_value(obj3);
360 strlen(prop_string_cstring_nocopy(obj3)) == 7 &&
362 prop_string_cstring_nocopy(obj3),
364 obj3 = prop_dictionary_get(obj2, "cur-value");
365 voltage = prop_number_integer_value(obj3);
369 prop_object_iterator_release(iter2);
372 prop_object_iterator_release(iter);
373 prop_object_release(dict);
377 OUTPUT_FULL_TEXT(format_down);
381 if (last_full_capacity)
382 full_design = last_full_cap;
385 batt_info->present_rate = (((float)voltage / 1000.0) * ((float)batt_info->present_rate / 1000.0));
386 remaining = (((float)voltage / 1000.0) * ((float)remaining / 1000.0));
387 full_design = (((float)voltage / 1000.0) * ((float)full_design / 1000.0));
390 batt_info->percentage_remaining =
391 (((float)remaining / (float)full_design) * 100);
394 batt_info->status = CS_FULL;
397 * The envsys(4) ACPI routines do not appear to provide a 'time
398 * remaining' figure, so we must deduce it.
400 batt_info->seconds_remaining = seconds_remaining_from_rate(batt_info->status, full_design, remaining, batt_info->present_rate);
406 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, const char *format_down, const char *status_chr, const char *status_bat, const char *status_unk, const char *status_full, int low_threshold, char *threshold_type, bool last_full_capacity, bool integer_battery_capacity, bool hide_seconds) {
408 char *outwalk = buffer;
409 struct battery_info batt_info = {
411 .seconds_remaining = -1,
412 .percentage_remaining = -1,
413 .status = CS_DISCHARGING,
415 bool colorful_output = false;
417 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__OpenBSD__)
418 /* These OSes report battery stats in whole percent. */
419 integer_battery_capacity = true;
421 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
422 /* These OSes report battery time in minutes. */
426 if (!slurp_battery_info(&batt_info, json_gen, buffer, number, path, format_down, last_full_capacity))
429 if (batt_info.status == CS_DISCHARGING && low_threshold > 0) {
430 if (batt_info.percentage_remaining >= 0 && strcasecmp(threshold_type, "percentage") == 0 && batt_info.percentage_remaining < low_threshold) {
431 START_COLOR("color_bad");
432 colorful_output = true;
433 } else if (batt_info.seconds_remaining >= 0 && strcasecmp(threshold_type, "time") == 0 && batt_info.seconds_remaining < 60 * low_threshold) {
434 START_COLOR("color_bad");
435 colorful_output = true;
439 #define EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT() \
441 if (outwalk == prevoutwalk) { \
442 if (outwalk > buffer && isspace(outwalk[-1])) \
444 else if (isspace(*(walk + 1))) \
449 for (walk = format; *walk != '\0'; walk++) {
450 char *prevoutwalk = outwalk;
453 *(outwalk++) = *walk;
457 if (BEGINS_WITH(walk + 1, "status")) {
458 const char *statusstr;
459 switch (batt_info.status) {
461 statusstr = status_chr;
464 statusstr = status_bat;
467 statusstr = status_full;
470 statusstr = status_unk;
473 outwalk += sprintf(outwalk, "%s", statusstr);
474 walk += strlen("status");
475 } else if (BEGINS_WITH(walk + 1, "percentage")) {
476 if (integer_battery_capacity) {
477 outwalk += sprintf(outwalk, "%.00f%s", batt_info.percentage_remaining, pct_mark);
479 outwalk += sprintf(outwalk, "%.02f%s", batt_info.percentage_remaining, pct_mark);
481 walk += strlen("percentage");
482 } else if (BEGINS_WITH(walk + 1, "remaining")) {
483 if (batt_info.seconds_remaining >= 0) {
484 int seconds, hours, minutes;
486 hours = batt_info.seconds_remaining / 3600;
487 seconds = batt_info.seconds_remaining - (hours * 3600);
488 minutes = seconds / 60;
489 seconds -= (minutes * 60);
492 outwalk += sprintf(outwalk, "%02d:%02d",
493 max(hours, 0), max(minutes, 0));
495 outwalk += sprintf(outwalk, "%02d:%02d:%02d",
496 max(hours, 0), max(minutes, 0), max(seconds, 0));
498 walk += strlen("remaining");
499 EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT();
500 } else if (BEGINS_WITH(walk + 1, "emptytime")) {
501 if (batt_info.seconds_remaining >= 0) {
502 time_t empty_time = time(NULL) + batt_info.seconds_remaining;
503 struct tm *empty_tm = localtime(&empty_time);
506 outwalk += sprintf(outwalk, "%02d:%02d",
507 max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0));
509 outwalk += sprintf(outwalk, "%02d:%02d:%02d",
510 max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
512 walk += strlen("emptytime");
513 EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT();
514 } else if (BEGINS_WITH(walk + 1, "consumption")) {
515 if (batt_info.present_rate >= 0)
516 outwalk += sprintf(outwalk, "%1.2fW", batt_info.present_rate / 1e6);
518 walk += strlen("consumption");
519 EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT();
526 OUTPUT_FULL_TEXT(buffer);