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

   1 // vim:ts=8:expandtab
   2 #include <time.h>
   3 #include <string.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <yajl/yajl_gen.h>
   7 #include <yajl/yajl_version.h>
   8
   9 #include "i3status.h"
  10
  11 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  12 #include <sys/types.h>
  13 #include <sys/sysctl.h>
  14 #endif
  15
  16 #if defined(__OpenBSD__)
  17 #include <sys/types.h>
  18 #include <sys/ioctl.h>
  19 #include <sys/fcntl.h>
  20 #include <machine/apmvar.h>
  21 #endif
  22
  23 #define BATT_STATUS_NAME(status) \
  24     (status == CS_CHARGING ? "CHR" : \
  25         (status == CS_DISCHARGING ? "BAT" : "FULL"))
  26 /*
  27  * Get battery information from /sys. Note that it uses the design capacity to
  28  * calculate the percentage, not the last full capacity, so you can see how
  29  * worn off your battery is.
  30  *
  31  */
  32 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, int threshold, bool last_full_capacity) {
  33         time_t empty_time;
  34         struct tm *empty_tm;
  35         char buf[1024];
  36         char statusbuf[16];
  37         char percentagebuf[16];
  38         char remainingbuf[256];
  39         char emptytimebuf[256];
  40         char consumptionbuf[256];
  41         const char *walk, *last;
  42         char *outwalk = buffer;
  43         int full_design = -1,
  44             remaining = -1,
  45             present_rate = -1,
  46             voltage = -1,
  47             current = -1;
  48         charging_status_t status = CS_DISCHARGING;
  49
  50         memset(statusbuf, '\0', sizeof(statusbuf));
  51         memset(percentagebuf, '\0', sizeof(percentagebuf));
  52         memset(remainingbuf, '\0', sizeof(remainingbuf));
  53         memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  54         memset(consumptionbuf, '\0', sizeof(consumptionbuf));
  55
  56         INSTANCE(path);
  57
  58 #if defined(LINUX)
  59         static char batpath[512];
  60         sprintf(batpath, path, number);
  61         if (!slurp(batpath, buf, sizeof(buf))) {
  62                 OUTPUT_FULL_TEXT("No battery");
  63                 return;
  64         }
  65
  66         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  67                 if (*walk == '\n') {
  68                         last = walk+1;
  69                         continue;
  70                 }
  71
  72                 if (*walk != '=')
  73                         continue;
  74
  75                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  76                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  77                         remaining = atoi(walk+1);
  78                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  79                         current = atoi(walk+1);
  80                 else if (BEGINS_WITH(last, "POWER_SUPPLY_VOLTAGE_NOW"))
  81                         voltage = atoi(walk+1);
  82                 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  83                         present_rate = atoi(walk+1);
  84                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  85                         status = CS_CHARGING;
  86                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  87                         status = CS_FULL;
  88                 else {
  89                         /* The only thing left is the full capacity */
  90                         if (last_full_capacity) {
  91                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  92                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  93                                         continue;
  94                         } else {
  95                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  96                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  97                                         continue;
  98                         }
  99
 100                         full_design = atoi(walk+1);
 101                 }
 102         }
 103
 104         /* on some systems POWER_SUPPLY_POWER_NOW does not exist, so we have to calculate it */
 105         if (present_rate == -1)
 106                 present_rate = ((float)voltage / 1000.0) * ((float)current / 1000.0);
 107
 108         if ((full_design == -1) || (remaining == -1)) {
 109                 OUTPUT_FULL_TEXT("No battery");
 110                 return;
 111         }
 112
 113         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 114
 115         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
 116                        (((float)remaining / (float)full_design) * 100));
 117
 118         if (present_rate > 0) {
 119                 float remaining_time;
 120                 int seconds, hours, minutes, seconds_remaining;
 121                 if (status == CS_CHARGING)
 122                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 123                 else if (status == CS_DISCHARGING)
 124                         remaining_time = ((float)remaining / (float)present_rate);
 125                 else remaining_time = 0;
 126
 127                 seconds_remaining = (int)(remaining_time * 3600.0);
 128
 129                 hours = seconds_remaining / 3600;
 130                 seconds = seconds_remaining - (hours * 3600);
 131                 minutes = seconds / 60;
 132                 seconds -= (minutes * 60);
 133
 134                 if (status == CS_DISCHARGING && threshold > 0 && seconds_remaining < 60 * threshold)
 135                         START_COLOR("color_bad");
 136
 137                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 138                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 139
 140                 empty_time = time(NULL);
 141                 empty_time += seconds_remaining;
 142                 empty_tm = localtime(&empty_time);
 143
 144                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 145                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 146
 147                 (void)snprintf(consumptionbuf, sizeof(consumptionbuf), "%1.2fW",
 148                         ((float)present_rate / 1000.0 / 1000.0));
 149
 150                 END_COLOR;
 151         }
 152 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 153         int state;
 154         int sysctl_rslt;
 155         size_t sysctl_size = sizeof(sysctl_rslt);
 156
 157         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 158                 OUTPUT_FULL_TEXT("No battery");
 159                 return;
 160         }
 161
 162         present_rate = sysctl_rslt;
 163         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 164                 OUTPUT_FULL_TEXT("No battery");
 165                 return;
 166         }
 167
 168         remaining = sysctl_rslt;
 169         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 170                 OUTPUT_FULL_TEXT("No battery");
 171                 return;
 172         }
 173
 174         state = sysctl_rslt;
 175         if (state == 0 && present_rate == 100)
 176                 status = CS_FULL;
 177         else if (state == 0 && present_rate < 100)
 178                 status = CS_CHARGING;
 179         else
 180                 status = CS_DISCHARGING;
 181
 182         full_design = sysctl_rslt;
 183
 184         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 185
 186         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 187                        present_rate);
 188
 189         if (state == 1) {
 190                 int hours, minutes;
 191                 minutes = remaining;
 192                 hours = minutes / 60;
 193                 minutes -= (hours * 60);
 194                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 195                                max(hours, 0), max(minutes, 0));
 196         }
 197 #elif defined(__OpenBSD__)
 198         /*
 199          * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
 200          * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
 201          * probing acpi(4) devices.
 202          */
 203         struct apm_power_info apm_info;
 204         int apm_fd, ac_status, charging;
 205
 206         apm_fd = open("/dev/apm", O_RDONLY);
 207         if (apm_fd < 0) {
 208                 OUTPUT_FULL_TEXT("can't open /dev/apm");
 209                 return;
 210         }
 211         if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
 212                 OUTPUT_FULL_TEXT("can't read power info");
 213
 214         close(apm_fd);
 215
 216         /* Don't bother to go further if there's no battery present. */
 217         if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
 218             (apm_info.battery_state == APM_BATT_UNKNOWN)) {
 219                 OUTPUT_FULL_TEXT("No battery");
 220                 return;
 221         }
 222
 223         switch(apm_info.ac_state) {
 224         case APM_AC_OFF:
 225                 ac_status = CS_DISCHARGING;
 226                 break;
 227         case APM_AC_ON:
 228                 ac_status = CS_CHARGING;
 229                 break;
 230         default:
 231                 /* If we don't know what's going on, just assume we're discharging. */
 232                 ac_status = CS_DISCHARGING;
 233                 break;
 234         }
 235
 236         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 237         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%", apm_info.battery_life);
 238
 239         /* Can't give a meaningful value for remaining minutes if we're charging. */
 240         if (ac_status == CS_CHARGING)
 241                 charging = 1;
 242
 243         (void)snprintf(remainingbuf, sizeof(remainingbuf), (charging ? "%s" : "%d"),
 244                        (charging ? "(CHR)" : apm_info.minutes_left));
 245 #endif
 246
 247         for (walk = format; *walk != '\0'; walk++) {
 248                 if (*walk != '%') {
 249                         *(outwalk++) = *walk;
 250                         continue;
 251                 }
 252
 253                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 254                         outwalk += sprintf(outwalk, "%s", statusbuf);
 255                         walk += strlen("status");
 256                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 257                         outwalk += sprintf(outwalk, "%s", percentagebuf);
 258                         walk += strlen("percentage");
 259                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 260                         outwalk += sprintf(outwalk, "%s", remainingbuf);
 261                         walk += strlen("remaining");
 262                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 263                         outwalk += sprintf(outwalk, "%s", emptytimebuf);
 264                         walk += strlen("emptytime");
 265                 } else if (strncmp(walk+1, "consumption", strlen("consumption")) == 0) {
 266                         outwalk += sprintf(outwalk, "%s", consumptionbuf);
 267                         walk += strlen("consumptionbuf");
 268                 }
 269         }
 270
 271         OUTPUT_FULL_TEXT(buffer);
 272 }