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

   1 // vim:ts=8:expandtab
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5
   6 #include "i3status.h"
   7
   8 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
   9 #include <sys/types.h>
  10 #include <sys/sysctl.h>
  11 #endif
  12
  13 /*
  14  * Get battery information from /sys. Note that it uses the design capacity to
  15  * calculate the percentage, not the last full capacity, so you can see how
  16  * worn off your battery is.
  17  *
  18  */
  19 void print_battery_info(int number, const char *format) {
  20         char buf[1024];
  21         char *walk, *last;
  22         int full_design = -1,
  23             remaining = -1,
  24             present_rate = -1;
  25         charging_status_t status = CS_DISCHARGING;
  26
  27 #if defined(LINUX)
  28         static char batpath[512];
  29         sprintf(batpath, "/sys/class/power_supply/BAT%d/uevent", number);
  30         if (!slurp(batpath, buf, sizeof(buf))) {
  31                 printf("No battery");
  32                 return;
  33         }
  34
  35         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  36                 if (*walk == '\n') {
  37                         last = walk+1;
  38                         continue;
  39                 }
  40
  41                 if (*walk != '=')
  42                         continue;
  43
  44                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  45                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  46                         remaining = atoi(walk+1);
  47                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  48                         present_rate = atoi(walk+1);
  49                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  50                         status = CS_CHARGING;
  51                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  52                         status = CS_FULL;
  53                 else {
  54                         /* The only thing left is the full capacity */
  55 #if 0
  56                         if (bat->use_last_full) {
  57                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  58                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  59                                         continue;
  60                         } else {
  61 #endif
  62                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  63                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  64                                         continue;
  65                         //}
  66
  67                         full_design = atoi(walk+1);
  68                 }
  69         }
  70
  71         if ((full_design == 1) || (remaining == -1))
  72                 return;
  73
  74         if (present_rate > 0) {
  75                 float remaining_time;
  76                 int seconds, hours, minutes;
  77                 if (status == CS_CHARGING)
  78                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
  79                 else if (status == CS_DISCHARGING)
  80                         remaining_time = ((float)remaining / (float)present_rate);
  81                 else remaining_time = 0;
  82
  83                 seconds = (int)(remaining_time * 3600.0);
  84                 hours = seconds / 3600;
  85                 seconds -= (hours * 3600);
  86                 minutes = seconds / 60;
  87                 seconds -= (minutes * 60);
  88
  89                 (void)printf("%s %.02f%% %02d:%02d:%02d",
  90                         (status == CS_CHARGING ? "CHR" :
  91                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
  92                         (((float)remaining / (float)full_design) * 100),
  93                         max(hours, 0), max(minutes, 0), max(seconds, 0));
  94         } else {
  95                 (void)printf("%s %.02f%%",
  96                         (status == CS_CHARGING ? "CHR" :
  97                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
  98                         (((float)remaining / (float)full_design) * 100));
  99         }
 100 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 101         int state;
 102         int sysctl_rslt;
 103         size_t sysctl_size = sizeof(sysctl_rslt);
 104
 105         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 106                 printf("No battery");
 107                 return;
 108         }
 109
 110         present_rate = sysctl_rslt;
 111         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 112                 printf("No battery");
 113                 return;
 114         }
 115
 116         remaining = sysctl_rslt;
 117         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 118                 printf("No battery");
 119                 return;
 120         }
 121
 122         state = sysctl_rslt;
 123         if (state == 0 && present_rate == 100)
 124                 status = CS_FULL;
 125         else if (state == 0 && present_rate < 100)
 126                 status = CS_CHARGING;
 127         else
 128                 status = CS_DISCHARGING;
 129
 130         full_design = sysctl_rslt;
 131
 132         if (state == 1) {
 133                 int hours, minutes;
 134                 minutes = remaining;
 135                 hours = minutes / 60;
 136                 minutes -= (hours * 60);
 137                 (void)printf("%s %02d%% %02dh%02d",
 138                                (status == CS_CHARGING ? "CHR" :
 139                                 (status == CS_DISCHARGING ? "BAT" : "FULL")),
 140                                present_rate,
 141                                max(hours, 0), max(minutes, 0));
 142         } else {
 143                 (void)printf("%s %02d%%",
 144                                (status == CS_CHARGING ? "CHR" :
 145                                 (status == CS_DISCHARGING ? "BAT" : "FULL")),
 146                                present_rate);
 147         }
 148 #endif
 149 }