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 /*
  17  * Get battery information from /sys. Note that it uses the design capacity to
  18  * calculate the percentage, not the last full capacity, so you can see how
  19  * worn off your battery is.
  20  *
  21  */
  22 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, bool last_full_capacity) {
  23         time_t empty_time;
  24         struct tm *empty_tm;
  25         char buf[1024];
  26         char statusbuf[16];
  27         char percentagebuf[16];
  28         char remainingbuf[256];
  29         char emptytimebuf[256];
  30         const char *walk, *last;
  31         char *outwalk = buffer;
  32         int full_design = -1,
  33             remaining = -1,
  34             present_rate = -1;
  35         charging_status_t status = CS_DISCHARGING;
  36
  37         memset(statusbuf, '\0', sizeof(statusbuf));
  38         memset(percentagebuf, '\0', sizeof(percentagebuf));
  39         memset(remainingbuf, '\0', sizeof(remainingbuf));
  40         memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  41
  42         INSTANCE(path);
  43
  44 #if defined(LINUX)
  45         static char batpath[512];
  46         sprintf(batpath, path, number);
  47         if (!slurp(batpath, buf, sizeof(buf))) {
  48                 OUTPUT_FULL_TEXT("No battery");
  49                 return;
  50         }
  51
  52         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  53                 if (*walk == '\n') {
  54                         last = walk+1;
  55                         continue;
  56                 }
  57
  58                 if (*walk != '=')
  59                         continue;
  60
  61                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  62                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  63                         remaining = atoi(walk+1);
  64                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  65                         present_rate = atoi(walk+1);
  66                 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  67                         present_rate = atoi(walk+1);
  68                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  69                         status = CS_CHARGING;
  70                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  71                         status = CS_FULL;
  72                 else {
  73                         /* The only thing left is the full capacity */
  74                         if (last_full_capacity) {
  75                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  76                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  77                                         continue;
  78                         } else {
  79                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  80                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  81                                         continue;
  82                         }
  83
  84                         full_design = atoi(walk+1);
  85                 }
  86         }
  87
  88         if ((full_design == 1) || (remaining == -1))
  89                 return;
  90
  91         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  92                         (status == CS_CHARGING ? "CHR" :
  93                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
  94
  95         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
  96                        (((float)remaining / (float)full_design) * 100));
  97
  98         if (present_rate > 0) {
  99                 float remaining_time;
 100                 int seconds, hours, minutes, seconds_remaining;
 101                 if (status == CS_CHARGING)
 102                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 103                 else if (status == CS_DISCHARGING)
 104                         remaining_time = ((float)remaining / (float)present_rate);
 105                 else remaining_time = 0;
 106
 107                 seconds_remaining = (int)(remaining_time * 3600.0);
 108
 109                 hours = seconds_remaining / 3600;
 110                 seconds = seconds_remaining - (hours * 3600);
 111                 minutes = seconds / 60;
 112                 seconds -= (minutes * 60);
 113
 114                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 115                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 116
 117                 empty_time = time(NULL);
 118                 empty_time += seconds_remaining;
 119                 empty_tm = localtime(&empty_time);
 120
 121                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 122                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 123         }
 124 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 125         int state;
 126         int sysctl_rslt;
 127         size_t sysctl_size = sizeof(sysctl_rslt);
 128
 129         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 130                 printf("No battery");
 131                 return;
 132         }
 133
 134         present_rate = sysctl_rslt;
 135         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 136                 printf("No battery");
 137                 return;
 138         }
 139
 140         remaining = sysctl_rslt;
 141         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 142                 printf("No battery");
 143                 return;
 144         }
 145
 146         state = sysctl_rslt;
 147         if (state == 0 && present_rate == 100)
 148                 status = CS_FULL;
 149         else if (state == 0 && present_rate < 100)
 150                 status = CS_CHARGING;
 151         else
 152                 status = CS_DISCHARGING;
 153
 154         full_design = sysctl_rslt;
 155
 156         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 157                         (status == CS_CHARGING ? "CHR" :
 158                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 159
 160         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 161                        present_rate);
 162
 163         if (state == 1) {
 164                 int hours, minutes;
 165                 minutes = remaining;
 166                 hours = minutes / 60;
 167                 minutes -= (hours * 60);
 168                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 169                                max(hours, 0), max(minutes, 0));
 170         }
 171 #endif
 172
 173         for (walk = format; *walk != '\0'; walk++) {
 174                 if (*walk != '%') {
 175                         *(outwalk++) = *walk;
 176                         continue;
 177                 }
 178
 179                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 180                         outwalk += sprintf(outwalk, "%s", statusbuf);
 181                         walk += strlen("status");
 182                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 183                         outwalk += sprintf(outwalk, "%s", percentagebuf);
 184                         walk += strlen("percentage");
 185                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 186                         outwalk += sprintf(outwalk, "%s", remainingbuf);
 187                         walk += strlen("remaining");
 188                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 189                         outwalk += sprintf(outwalk, "%s", emptytimebuf);
 190                         walk += strlen("emptytime");
 191                 }
 192         }
 193
 194         OUTPUT_FULL_TEXT(buffer);
 195 }