git.sur5r.net Git - i3/i3status/blob - src/get_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__)
   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 const char *get_battery_info(struct battery *bat) {
  20         char buf[1024];
  21         static char part[512];
  22         char *walk, *last;
  23         int full_design = -1,
  24             remaining = -1,
  25             present_rate = -1;
  26         charging_status_t status = CS_DISCHARGING;
  27
  28 #if defined(LINUX)
  29         slurp(bat->path, buf, sizeof(buf));
  30
  31         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  32                 if (*walk == '\n') {
  33                         last = walk+1;
  34                         continue;
  35                 }
  36
  37                 if (*walk != '=')
  38                         continue;
  39
  40                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  41                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  42                         remaining = atoi(walk+1);
  43                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  44                         present_rate = atoi(walk+1);
  45                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  46                         status = CS_CHARGING;
  47                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  48                         status = CS_FULL;
  49                 else {
  50                         /* The only thing left is the full capacity */
  51                         if (bat->use_last_full) {
  52                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  53                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  54                                         continue;
  55                         } else {
  56                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  57                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  58                                         continue;
  59                         }
  60
  61                         full_design = atoi(walk+1);
  62                 }
  63         }
  64
  65         if ((full_design == 1) || (remaining == -1))
  66                 return part;
  67
  68         if (present_rate > 0) {
  69                 float remaining_time;
  70                 int seconds, hours, minutes;
  71                 if (status == CS_CHARGING)
  72                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
  73                 else if (status == CS_DISCHARGING)
  74                         remaining_time = ((float)remaining / (float)present_rate);
  75                 else remaining_time = 0;
  76
  77                 seconds = (int)(remaining_time * 3600.0);
  78                 hours = seconds / 3600;
  79                 seconds -= (hours * 3600);
  80                 minutes = seconds / 60;
  81                 seconds -= (minutes * 60);
  82
  83                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
  84                         (status == CS_CHARGING ? "CHR" :
  85                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
  86                         (((float)remaining / (float)full_design) * 100),
  87                         max(hours, 0), max(minutes, 0), max(seconds, 0));
  88         } else {
  89                 (void)snprintf(part, sizeof(part), "%s %.02f%%",
  90                         (status == CS_CHARGING ? "CHR" :
  91                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
  92                         (((float)remaining / (float)full_design) * 100));
  93         }
  94 #elif defined(__FreeBSD__)
  95         int state;
  96         int sysctl_rslt;
  97         size_t sysctl_size = sizeof(sysctl_rslt);
  98
  99         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0)
 100                 return "No battery";
 101
 102         present_rate = sysctl_rslt;
 103         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0)
 104                 return "No battery";
 105
 106         remaining = sysctl_rslt;
 107         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0)
 108                 return "No battery";
 109
 110         state = sysctl_rslt;
 111         if (state == 0 && present_rate == 100)
 112                 status = CS_FULL;
 113         else if (state == 0 && present_rate < 100)
 114                 status = CS_CHARGING;
 115         else
 116                 status = CS_DISCHARGING;
 117
 118         full_design = sysctl_rslt;
 119
 120         if (state == 1) {
 121                 int hours, minutes;
 122                 minutes = remaining;
 123                 hours = minutes / 60;
 124                 minutes -= (hours * 60);
 125                 (void)snprintf(part, sizeof(part), "%s %02d%% %02dh%02d",
 126                                (status == CS_CHARGING ? "CHR" :
 127                                 (status == CS_DISCHARGING ? "BAT" : "FULL")),
 128                                present_rate,
 129                                max(hours, 0), max(minutes, 0));
 130         } else {
 131                 (void)snprintf(part, sizeof(part), "%s %02d%%",
 132                                (status == CS_CHARGING ? "CHR" :
 133                                 (status == CS_DISCHARGING ? "BAT" : "FULL")),
 134                                present_rate);
 135         }
 136 #endif
 137         return part;
 138 }