git.sur5r.net Git - i3/i3status/blob - src/print_battery_info.c

   1 // vim:ts=4:sw=4:expandtab
   2 #include <config.h>
   3 #include <ctype.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <time.h>
   8 #include <yajl/yajl_gen.h>
   9 #include <yajl/yajl_version.h>
  10
  11 #include "i3status.h"
  12
  13 #if defined(__linux__)
  14 #include <errno.h>
  15 #include <glob.h>
  16 #include <sys/types.h>
  17 #endif
  18
  19 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
  20 #include <dev/acpica/acpiio.h>
  21 #include <sys/sysctl.h>
  22 #include <sys/types.h>
  23 #endif
  24
  25 #if defined(__DragonFly__)
  26 #include <sys/fcntl.h>
  27 #endif
  28
  29 #if defined(__OpenBSD__)
  30 #include <machine/apmvar.h>
  31 #include <sys/fcntl.h>
  32 #include <sys/ioctl.h>
  33 #include <sys/types.h>
  34 #endif
  35
  36 #if defined(__NetBSD__)
  37 #include <fcntl.h>
  38 #include <prop/proplib.h>
  39 #include <sys/envsys.h>
  40 #endif
  41
  42 typedef enum {
  43     CS_UNKNOWN,
  44     CS_DISCHARGING,
  45     CS_CHARGING,
  46     CS_FULL,
  47 } charging_status_t;
  48
  49 /* A description of the state of one or more batteries. */
  50 struct battery_info {
  51     /* measured properties */
  52     int full_design;  /* in uAh */
  53     int full_last;    /* in uAh */
  54     int remaining;    /* in uAh */
  55     int present_rate; /* in uA, always non-negative */
  56
  57     /* derived properties */
  58     int seconds_remaining;
  59     float percentage_remaining;
  60     charging_status_t status;
  61 };
  62
  63 #if defined(__DragonFly__)
  64 #define ACPIDEV "/dev/acpi"
  65 static int acpifd;
  66
  67 static bool acpi_init(void) {
  68     if (acpifd == 0) {
  69         acpifd = open(ACPIDEV, O_RDWR);
  70         if (acpifd == -1)
  71             acpifd = open(ACPIDEV, O_RDONLY);
  72         if (acpifd == -1)
  73             return false;
  74     }
  75     return true;
  76 }
  77 #endif
  78
  79 #if defined(__linux__) || defined(__NetBSD__)
  80 /*
  81  * Add batt_info data to acc.
  82  */
  83 static void add_battery_info(struct battery_info *acc, const struct battery_info *batt_info) {
  84     if (acc->remaining < 0) {
  85         /* initialize accumulator so we can add to it */
  86         acc->full_design = 0;
  87         acc->full_last = 0;
  88         acc->remaining = 0;
  89         acc->present_rate = 0;
  90     }
  91
  92     acc->full_design += batt_info->full_design;
  93     acc->full_last += batt_info->full_last;
  94     acc->remaining += batt_info->remaining;
  95
  96     /* make present_rate negative for discharging and positive for charging */
  97     int present_rate = (acc->status == CS_DISCHARGING ? -1 : 1) * acc->present_rate;
  98     present_rate += (batt_info->status == CS_DISCHARGING ? -1 : 1) * batt_info->present_rate;
  99
 100     /* merge status */
 101     switch (acc->status) {
 102         case CS_UNKNOWN:
 103             acc->status = batt_info->status;
 104             break;
 105
 106         case CS_DISCHARGING:
 107             if (present_rate > 0)
 108                 acc->status = CS_CHARGING;
 109             /* else if batt_info is DISCHARGING: no conflict
 110              * else if batt_info is CHARGING: present_rate should indicate that
 111              * else if batt_info is FULL: but something else is discharging */
 112             break;
 113
 114         case CS_CHARGING:
 115             if (present_rate < 0)
 116                 acc->status = CS_DISCHARGING;
 117             /* else if batt_info is DISCHARGING: present_rate should indicate that
 118              * else if batt_info is CHARGING: no conflict
 119              * else if batt_info is FULL: but something else is charging */
 120             break;
 121
 122         case CS_FULL:
 123             if (batt_info->status != CS_UNKNOWN)
 124                 acc->status = batt_info->status;
 125             /* else: retain FULL, since it is more specific than UNKNOWN */
 126             break;
 127     }
 128
 129     acc->present_rate = abs(present_rate);
 130 }
 131 #endif
 132
 133 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) {
 134     char *outwalk = buffer;
 135
 136 #if defined(__linux__)
 137     char buf[1024];
 138     const char *walk, *last;
 139     bool watt_as_unit = false;
 140     int voltage = -1;
 141     char batpath[512];
 142     sprintf(batpath, path, number);
 143     INSTANCE(batpath);
 144
 145     if (!slurp(batpath, buf, sizeof(buf))) {
 146         OUTPUT_FULL_TEXT(format_down);
 147         return false;
 148     }
 149
 150     for (walk = buf, last = buf; (walk - buf) < 1024; walk++) {
 151         if (*walk == '\n') {
 152             last = walk + 1;
 153             continue;
 154         }
 155
 156         if (*walk != '=')
 157             continue;
 158
 159         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW=")) {
 160             watt_as_unit = true;
 161             batt_info->remaining = atoi(walk + 1);
 162             batt_info->percentage_remaining = -1;
 163         } else if (BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW=")) {
 164             watt_as_unit = false;
 165             batt_info->remaining = atoi(walk + 1);
 166             batt_info->percentage_remaining = -1;
 167         } else if (BEGINS_WITH(last, "POWER_SUPPLY_CAPACITY=") && batt_info->remaining == -1) {
 168             batt_info->percentage_remaining = atoi(walk + 1);
 169         } else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW="))
 170             batt_info->present_rate = abs(atoi(walk + 1));
 171         else if (BEGINS_WITH(last, "POWER_SUPPLY_VOLTAGE_NOW="))
 172             voltage = abs(atoi(walk + 1));
 173         /* on some systems POWER_SUPPLY_POWER_NOW does not exist, but actually
 174          * it is the same as POWER_SUPPLY_CURRENT_NOW but with μWh as
 175          * unit instead of μAh. We will calculate it as we need it
 176          * later. */
 177         else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW="))
 178             batt_info->present_rate = abs(atoi(walk + 1));
 179         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 180             batt_info->status = CS_CHARGING;
 181         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 182             batt_info->status = CS_FULL;
 183         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Discharging") || BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Not charging"))
 184             batt_info->status = CS_DISCHARGING;
 185         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS="))
 186             batt_info->status = CS_UNKNOWN;
 187         else if (BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN=") ||
 188                  BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN="))
 189             batt_info->full_design = atoi(walk + 1);
 190         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL=") ||
 191                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL="))
 192             batt_info->full_last = atoi(walk + 1);
 193     }
 194
 195     /* the difference between POWER_SUPPLY_ENERGY_NOW and
 196      * POWER_SUPPLY_CHARGE_NOW is the unit of measurement. The energy is
 197      * given in mWh, the charge in mAh. So calculate every value given in
 198      * ampere to watt */
 199     if (!watt_as_unit && voltage >= 0) {
 200         if (batt_info->present_rate > 0) {
 201             batt_info->present_rate = (((float)voltage / 1000.0) * ((float)batt_info->present_rate / 1000.0));
 202         }
 203         if (batt_info->remaining > 0) {
 204             batt_info->remaining = (((float)voltage / 1000.0) * ((float)batt_info->remaining / 1000.0));
 205         }
 206         if (batt_info->full_design > 0) {
 207             batt_info->full_design = (((float)voltage / 1000.0) * ((float)batt_info->full_design / 1000.0));
 208         }
 209         if (batt_info->full_last > 0) {
 210             batt_info->full_last = (((float)voltage / 1000.0) * ((float)batt_info->full_last / 1000.0));
 211         }
 212     }
 213 #elif defined(__DragonFly__)
 214     union acpi_battery_ioctl_arg battio;
 215     if (acpi_init()) {
 216         battio.unit = number;
 217         ioctl(acpifd, ACPIIO_BATT_GET_BIF, &battio);
 218         batt_info->full_design = battio.bif.dcap;
 219         batt_info->full_last = battio.bif.lfcap;
 220         battio.unit = number;
 221         ioctl(acpifd, ACPIIO_BATT_GET_BATTINFO, &battio);
 222         batt_info->percentage_remaining = battio.battinfo.cap;
 223         batt_info->present_rate = battio.battinfo.rate;
 224         batt_info->seconds_remaining = battio.battinfo.min * 60;
 225         switch (battio.battinfo.state) {
 226             case 0:
 227                 batt_info->status = CS_FULL;
 228                 break;
 229             case ACPI_BATT_STAT_CHARGING:
 230                 batt_info->status = CS_CHARGING;
 231                 break;
 232             case ACPI_BATT_STAT_DISCHARG:
 233                 batt_info->status = CS_DISCHARGING;
 234                 break;
 235             default:
 236                 batt_info->status = CS_UNKNOWN;
 237         }
 238         OUTPUT_FULL_TEXT(format_down);
 239     }
 240 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 241     int state;
 242     int sysctl_rslt;
 243     size_t sysctl_size = sizeof(sysctl_rslt);
 244
 245     if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 246         OUTPUT_FULL_TEXT(format_down);
 247         return false;
 248     }
 249
 250     batt_info->percentage_remaining = sysctl_rslt;
 251     if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 252         OUTPUT_FULL_TEXT(format_down);
 253         return false;
 254     }
 255
 256     batt_info->seconds_remaining = sysctl_rslt * 60;
 257     if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 258         OUTPUT_FULL_TEXT(format_down);
 259         return false;
 260     }
 261
 262     state = sysctl_rslt;
 263     if (state == 0 && batt_info->percentage_remaining == 100)
 264         batt_info->status = CS_FULL;
 265     else if ((state & ACPI_BATT_STAT_CHARGING) && batt_info->percentage_remaining < 100)
 266         batt_info->status = CS_CHARGING;
 267     else
 268         batt_info->status = CS_DISCHARGING;
 269 #elif defined(__OpenBSD__)
 270     /*
 271          * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
 272          * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
 273          * probing acpi(4) devices.
 274          */
 275     struct apm_power_info apm_info;
 276     int apm_fd;
 277
 278     apm_fd = open("/dev/apm", O_RDONLY);
 279     if (apm_fd < 0) {
 280         OUTPUT_FULL_TEXT("can't open /dev/apm");
 281         return false;
 282     }
 283     if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
 284         OUTPUT_FULL_TEXT("can't read power info");
 285
 286     close(apm_fd);
 287
 288     /* Don't bother to go further if there's no battery present. */
 289     if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
 290         (apm_info.battery_state == APM_BATT_UNKNOWN)) {
 291         OUTPUT_FULL_TEXT(format_down);
 292         return false;
 293     }
 294
 295     switch (apm_info.ac_state) {
 296         case APM_AC_OFF:
 297             batt_info->status = CS_DISCHARGING;
 298             break;
 299         case APM_AC_ON:
 300             batt_info->status = CS_CHARGING;
 301             break;
 302         default:
 303             /* If we don't know what's going on, just assume we're discharging. */
 304             batt_info->status = CS_DISCHARGING;
 305             break;
 306     }
 307
 308     batt_info->percentage_remaining = apm_info.battery_life;
 309
 310     /* Can't give a meaningful value for remaining minutes if we're charging. */
 311     if (batt_info->status != CS_CHARGING) {
 312         batt_info->seconds_remaining = apm_info.minutes_left * 60;
 313     }
 314 #elif defined(__NetBSD__)
 315     /*
 316      * Using envsys(4) via sysmon(4).
 317      */
 318     int fd, rval;
 319     bool is_found = false;
 320     char sensor_desc[16];
 321
 322     prop_dictionary_t dict;
 323     prop_array_t array;
 324     prop_object_iterator_t iter;
 325     prop_object_iterator_t iter2;
 326     prop_object_t obj, obj2, obj3, obj4, obj5;
 327
 328     if (number >= 0)
 329         (void)snprintf(sensor_desc, sizeof(sensor_desc), "acpibat%d", number);
 330
 331     fd = open("/dev/sysmon", O_RDONLY);
 332     if (fd < 0) {
 333         OUTPUT_FULL_TEXT("can't open /dev/sysmon");
 334         return false;
 335     }
 336
 337     rval = prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &dict);
 338     if (rval == -1) {
 339         close(fd);
 340         return false;
 341     }
 342
 343     if (prop_dictionary_count(dict) == 0) {
 344         prop_object_release(dict);
 345         close(fd);
 346         return false;
 347     }
 348
 349     iter = prop_dictionary_iterator(dict);
 350     if (iter == NULL) {
 351         prop_object_release(dict);
 352         close(fd);
 353     }
 354
 355     /* iterate over the dictionary returned by the kernel */
 356     while ((obj = prop_object_iterator_next(iter)) != NULL) {
 357         /* skip this dict if it's not what we're looking for */
 358         if (number < 0) {
 359             /* we want all batteries */
 360             if (!BEGINS_WITH(prop_dictionary_keysym_cstring_nocopy(obj),
 361                              "acpibat"))
 362                 continue;
 363         } else {
 364             /* we want a specific battery */
 365             if (strcmp(sensor_desc,
 366                        prop_dictionary_keysym_cstring_nocopy(obj)) != 0)
 367                 continue;
 368         }
 369
 370         is_found = true;
 371
 372         array = prop_dictionary_get_keysym(dict, obj);
 373         if (prop_object_type(array) != PROP_TYPE_ARRAY) {
 374             prop_object_iterator_release(iter);
 375             prop_object_release(dict);
 376             close(fd);
 377             return false;
 378         }
 379
 380         iter2 = prop_array_iterator(array);
 381         if (!iter2) {
 382             prop_object_iterator_release(iter);
 383             prop_object_release(dict);
 384             close(fd);
 385             return false;
 386         }
 387
 388         struct battery_info batt_buf = {
 389             .full_design = 0,
 390             .full_last = 0,
 391             .remaining = 0,
 392             .present_rate = 0,
 393             .status = CS_UNKNOWN,
 394         };
 395         int voltage = -1;
 396         bool watt_as_unit = false;
 397
 398         /* iterate over array of dicts specific to target battery */
 399         while ((obj2 = prop_object_iterator_next(iter2)) != NULL) {
 400             obj3 = prop_dictionary_get(obj2, "description");
 401
 402             if (obj3 == NULL)
 403                 continue;
 404
 405             if (strcmp("charging", prop_string_cstring_nocopy(obj3)) == 0) {
 406                 obj3 = prop_dictionary_get(obj2, "cur-value");
 407
 408                 if (prop_number_integer_value(obj3))
 409                     batt_buf.status = CS_CHARGING;
 410                 else
 411                     batt_buf.status = CS_DISCHARGING;
 412             } else if (strcmp("charge", prop_string_cstring_nocopy(obj3)) == 0) {
 413                 obj3 = prop_dictionary_get(obj2, "cur-value");
 414                 obj4 = prop_dictionary_get(obj2, "max-value");
 415                 obj5 = prop_dictionary_get(obj2, "type");
 416
 417                 batt_buf.remaining = prop_number_integer_value(obj3);
 418                 batt_buf.full_design = prop_number_integer_value(obj4);
 419
 420                 if (strcmp("Ampere hour", prop_string_cstring_nocopy(obj5)) == 0)
 421                     watt_as_unit = false;
 422                 else
 423                     watt_as_unit = true;
 424             } else if (strcmp("discharge rate", prop_string_cstring_nocopy(obj3)) == 0) {
 425                 obj3 = prop_dictionary_get(obj2, "cur-value");
 426                 batt_buf.present_rate = prop_number_integer_value(obj3);
 427             } else if (strcmp("charge rate", prop_string_cstring_nocopy(obj3)) == 0) {
 428                 obj3 = prop_dictionary_get(obj2, "cur-value");
 429                 batt_info->present_rate = prop_number_integer_value(obj3);
 430             } else if (strcmp("last full cap", prop_string_cstring_nocopy(obj3)) == 0) {
 431                 obj3 = prop_dictionary_get(obj2, "cur-value");
 432                 batt_buf.full_last = prop_number_integer_value(obj3);
 433             } else if (strcmp("voltage", prop_string_cstring_nocopy(obj3)) == 0) {
 434                 obj3 = prop_dictionary_get(obj2, "cur-value");
 435                 voltage = prop_number_integer_value(obj3);
 436             }
 437         }
 438         prop_object_iterator_release(iter2);
 439
 440         if (!watt_as_unit && voltage != -1) {
 441             batt_buf.present_rate = (((float)voltage / 1000.0) * ((float)batt_buf.present_rate / 1000.0));
 442             batt_buf.remaining = (((float)voltage / 1000.0) * ((float)batt_buf.remaining / 1000.0));
 443             batt_buf.full_design = (((float)voltage / 1000.0) * ((float)batt_buf.full_design / 1000.0));
 444             batt_buf.full_last = (((float)voltage / 1000.0) * ((float)batt_buf.full_last / 1000.0));
 445         }
 446
 447         if (batt_buf.remaining == batt_buf.full_design)
 448             batt_buf.status = CS_FULL;
 449
 450         add_battery_info(batt_info, &batt_buf);
 451     }
 452
 453     prop_object_iterator_release(iter);
 454     prop_object_release(dict);
 455     close(fd);
 456
 457     if (!is_found) {
 458         OUTPUT_FULL_TEXT(format_down);
 459         return false;
 460     }
 461
 462     batt_info->present_rate = abs(batt_info->present_rate);
 463 #endif
 464
 465     return true;
 466 }
 467
 468 /*
 469  * Populate batt_info with aggregate information about all batteries.
 470  * Returns false on error, and an error message will have been written.
 471  */
 472 static bool slurp_all_batteries(struct battery_info *batt_info, yajl_gen json_gen, char *buffer, const char *path, const char *format_down) {
 473 #if defined(__linux__)
 474     char *outwalk = buffer;
 475     bool is_found = false;
 476
 477     char *placeholder;
 478     char *globpath = sstrdup(path);
 479     if ((placeholder = strstr(path, "%d")) != NULL) {
 480         char *globplaceholder = globpath + (placeholder - path);
 481         *globplaceholder = '*';
 482         strcpy(globplaceholder + 1, placeholder + 2);
 483     }
 484
 485     if (!strcmp(globpath, path)) {
 486         OUTPUT_FULL_TEXT("no '%d' in battery path");
 487         return false;
 488     }
 489
 490     glob_t globbuf;
 491     if (glob(globpath, 0, NULL, &globbuf) == 0) {
 492         for (size_t i = 0; i < globbuf.gl_pathc; i++) {
 493             /* Probe to see if there is such a battery. */
 494             struct battery_info batt_buf = {
 495                 .full_design = 0,
 496                 .full_last = 0,
 497                 .remaining = 0,
 498                 .present_rate = 0,
 499                 .status = CS_UNKNOWN,
 500             };
 501             if (!slurp_battery_info(&batt_buf, json_gen, buffer, i, globbuf.gl_pathv[i], format_down)) {
 502                 globfree(&globbuf);
 503                 free(globpath);
 504                 return false;
 505             }
 506
 507             is_found = true;
 508             add_battery_info(batt_info, &batt_buf);
 509         }
 510         globfree(&globbuf);
 511     }
 512     free(globpath);
 513
 514     if (!is_found) {
 515         OUTPUT_FULL_TEXT(format_down);
 516         return false;
 517     }
 518
 519     batt_info->present_rate = abs(batt_info->present_rate);
 520 #else
 521     /* FreeBSD and OpenBSD only report aggregates. NetBSD always
 522      * iterates through all batteries, so it's more efficient to
 523      * aggregate in slurp_battery_info. */
 524     return slurp_battery_info(batt_info, json_gen, buffer, -1, path, format_down);
 525 #endif
 526
 527     return true;
 528 }
 529
 530 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) {
 531     const char *walk;
 532     char *outwalk = buffer;
 533     struct battery_info batt_info = {
 534         .full_design = -1,
 535         .full_last = -1,
 536         .remaining = -1,
 537         .present_rate = -1,
 538         .seconds_remaining = -1,
 539         .percentage_remaining = -1,
 540         .status = CS_UNKNOWN,
 541     };
 542     bool colorful_output = false;
 543
 544 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__OpenBSD__)
 545     /* These OSes report battery stats in whole percent. */
 546     integer_battery_capacity = true;
 547 #endif
 548 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) || defined(__OpenBSD__)
 549     /* These OSes report battery time in minutes. */
 550     hide_seconds = true;
 551 #endif
 552
 553     if (number < 0) {
 554         if (!slurp_all_batteries(&batt_info, json_gen, buffer, path, format_down))
 555             return;
 556     } else {
 557         if (!slurp_battery_info(&batt_info, json_gen, buffer, number, path, format_down))
 558             return;
 559     }
 560
 561     // *Choose* a measure of the 'full' battery. It is whichever is better of
 562     // the battery's (hardware-given) design capacity (batt_info.full_design)
 563     // and the battery's last known good charge (batt_info.full_last).
 564     // We prefer the design capacity, but use the last capacity if we don't have it,
 565     // or if we are asked to (last_full_capacity == true); but similarly we use
 566     // the design capacity if we don't have the last capacity.
 567     // If we don't have either then both full_design and full_last <= 0,
 568     // which implies full <= 0, which bails out on the following line.
 569     int full = batt_info.full_design;
 570     if (full <= 0 || (last_full_capacity && batt_info.full_last > 0)) {
 571         full = batt_info.full_last;
 572     }
 573     if (full <= 0 && batt_info.remaining < 0 && batt_info.percentage_remaining < 0) {
 574         /* We have no physical measurements and no estimates. Nothing
 575          * much we can report, then. */
 576         OUTPUT_FULL_TEXT(format_down);
 577         return;
 578     }
 579
 580     if (batt_info.percentage_remaining < 0) {
 581         batt_info.percentage_remaining = (((float)batt_info.remaining / (float)full) * 100);
 582         /* Some batteries report POWER_SUPPLY_CHARGE_NOW=<full_design> when fully
 583          * charged, even though that’s plainly wrong. For people who chose to see
 584          * the percentage calculated based on the last full capacity, we clamp the
 585          * value to 100%, as that makes more sense.
 586          * See http://bugs.debian.org/785398 */
 587         if (last_full_capacity && batt_info.percentage_remaining > 100) {
 588             batt_info.percentage_remaining = 100;
 589         }
 590     }
 591
 592     if (batt_info.seconds_remaining < 0 && batt_info.present_rate > 0 && batt_info.status != CS_FULL) {
 593         if (batt_info.status == CS_CHARGING)
 594             batt_info.seconds_remaining = 3600.0 * (full - batt_info.remaining) / batt_info.present_rate;
 595         else if (batt_info.status == CS_DISCHARGING)
 596             batt_info.seconds_remaining = 3600.0 * batt_info.remaining / batt_info.present_rate;
 597         else
 598             batt_info.seconds_remaining = 0;
 599     }
 600
 601     if (batt_info.status == CS_DISCHARGING && low_threshold > 0) {
 602         if (batt_info.percentage_remaining >= 0 && strcasecmp(threshold_type, "percentage") == 0 && batt_info.percentage_remaining < low_threshold) {
 603             START_COLOR("color_bad");
 604             colorful_output = true;
 605         } else if (batt_info.seconds_remaining >= 0 && strcasecmp(threshold_type, "time") == 0 && batt_info.seconds_remaining < 60 * low_threshold) {
 606             START_COLOR("color_bad");
 607             colorful_output = true;
 608         }
 609     }
 610
 611 #define EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT()                   \
 612     do {                                                       \
 613         if (outwalk == prevoutwalk) {                          \
 614             if (outwalk > buffer && isspace((int)outwalk[-1])) \
 615                 outwalk--;                                     \
 616             else if (isspace((int)*(walk + 1)))                \
 617                 walk++;                                        \
 618         }                                                      \
 619     } while (0)
 620
 621     for (walk = format; *walk != '\0'; walk++) {
 622         char *prevoutwalk = outwalk;
 623
 624         if (*walk != '%') {
 625             *(outwalk++) = *walk;
 626
 627         } else if (BEGINS_WITH(walk + 1, "status")) {
 628             const char *statusstr;
 629             switch (batt_info.status) {
 630                 case CS_CHARGING:
 631                     statusstr = status_chr;
 632                     break;
 633                 case CS_DISCHARGING:
 634                     statusstr = status_bat;
 635                     break;
 636                 case CS_FULL:
 637                     statusstr = status_full;
 638                     break;
 639                 default:
 640                     statusstr = status_unk;
 641             }
 642
 643             outwalk += sprintf(outwalk, "%s", statusstr);
 644             walk += strlen("status");
 645
 646         } else if (BEGINS_WITH(walk + 1, "percentage")) {
 647             if (integer_battery_capacity) {
 648                 outwalk += sprintf(outwalk, "%.00f%s", batt_info.percentage_remaining, pct_mark);
 649             } else {
 650                 outwalk += sprintf(outwalk, "%.02f%s", batt_info.percentage_remaining, pct_mark);
 651             }
 652             walk += strlen("percentage");
 653
 654         } else if (BEGINS_WITH(walk + 1, "remaining")) {
 655             if (batt_info.seconds_remaining >= 0) {
 656                 int seconds, hours, minutes;
 657
 658                 hours = batt_info.seconds_remaining / 3600;
 659                 seconds = batt_info.seconds_remaining - (hours * 3600);
 660                 minutes = seconds / 60;
 661                 seconds -= (minutes * 60);
 662
 663                 if (hide_seconds)
 664                     outwalk += sprintf(outwalk, "%02d:%02d",
 665                                        max(hours, 0), max(minutes, 0));
 666                 else
 667                     outwalk += sprintf(outwalk, "%02d:%02d:%02d",
 668                                        max(hours, 0), max(minutes, 0), max(seconds, 0));
 669             }
 670             walk += strlen("remaining");
 671             EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT();
 672
 673         } else if (BEGINS_WITH(walk + 1, "emptytime")) {
 674             if (batt_info.seconds_remaining >= 0) {
 675                 time_t empty_time = time(NULL) + batt_info.seconds_remaining;
 676                 set_timezone(NULL); /* Use local time. */
 677                 struct tm *empty_tm = localtime(&empty_time);
 678
 679                 if (hide_seconds)
 680                     outwalk += sprintf(outwalk, "%02d:%02d",
 681                                        max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0));
 682                 else
 683                     outwalk += sprintf(outwalk, "%02d:%02d:%02d",
 684                                        max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 685             }
 686             walk += strlen("emptytime");
 687             EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT();
 688
 689         } else if (BEGINS_WITH(walk + 1, "consumption")) {
 690             if (batt_info.present_rate >= 0)
 691                 outwalk += sprintf(outwalk, "%1.2fW", batt_info.present_rate / 1e6);
 692
 693             walk += strlen("consumption");
 694             EAT_SPACE_FROM_OUTPUT_IF_NO_OUTPUT();
 695
 696         } else {
 697             *(outwalk++) = '%';
 698         }
 699     }
 700
 701     if (colorful_output)
 702         END_COLOR;
 703
 704     OUTPUT_FULL_TEXT(buffer);
 705 }