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         if (!slurp(bat->path, buf, sizeof(buf)))
  30                 return "No battery";
  31
  32         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  33                 if (*walk == '\n') {
  34                         last = walk+1;
  35                         continue;
  36                 }
  37
  38                 if (*walk != '=')
  39                         continue;
  40
  41                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  42                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  43                         remaining = atoi(walk+1);
  44                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  45                         present_rate = atoi(walk+1);
  46                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  47                         status = CS_CHARGING;
  48                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  49                         status = CS_FULL;
  50                 else {
  51                         /* The only thing left is the full capacity */
  52                         if (bat->use_last_full) {
  53                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  54                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  55                                         continue;
  56                         } else {
  57                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  58                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  59                                         continue;
  60                         }
  61
  62                         full_design = atoi(walk+1);
  63                 }
  64         }
  65
  66         if ((full_design == 1) || (remaining == -1))
  67                 return part;
  68
  69         if (present_rate > 0) {
  70                 float remaining_time;
  71                 int seconds, hours, minutes;
  72                 if (status == CS_CHARGING)
  73                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
  74                 else if (status == CS_DISCHARGING)
  75                         remaining_time = ((float)remaining / (float)present_rate);
  76                 else remaining_time = 0;
  77
  78                 seconds = (int)(remaining_time * 3600.0);
  79                 hours = seconds / 3600;
  80                 seconds -= (hours * 3600);
  81                 minutes = seconds / 60;
  82                 seconds -= (minutes * 60);
  83
  84                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
  85                         (status == CS_CHARGING ? "CHR" :
  86                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
  87                         (((float)remaining / (float)full_design) * 100),
  88                         max(hours, 0), max(minutes, 0), max(seconds, 0));
  89         } else {
  90                 (void)snprintf(part, sizeof(part), "%s %.02f%%",
  91                         (status == CS_CHARGING ? "CHR" :
  92                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
  93                         (((float)remaining / (float)full_design) * 100));
  94         }
  95 #elif defined(__FreeBSD__)
  96         int state;
  97         int sysctl_rslt;
  98         size_t sysctl_size = sizeof(sysctl_rslt);
  99
 100         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0)
 101                 return "No battery";
 102
 103         present_rate = sysctl_rslt;
 104         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0)
 105                 return "No battery";
 106
 107         remaining = sysctl_rslt;
 108         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0)
 109                 return "No battery";
 110
 111         state = sysctl_rslt;
 112         if (state == 0 && present_rate == 100)
 113                 status = CS_FULL;
 114         else if (state == 0 && present_rate < 100)
 115                 status = CS_CHARGING;
 116         else
 117                 status = CS_DISCHARGING;
 118
 119         full_design = sysctl_rslt;
 120
 121         if (state == 1) {
 122                 int hours, minutes;
 123                 minutes = remaining;
 124                 hours = minutes / 60;
 125                 minutes -= (hours * 60);
 126                 (void)snprintf(part, sizeof(part), "%s %02d%% %02dh%02d",
 127                                (status == CS_CHARGING ? "CHR" :
 128                                 (status == CS_DISCHARGING ? "BAT" : "FULL")),
 129                                present_rate,
 130                                max(hours, 0), max(minutes, 0));
 131         } else {
 132                 (void)snprintf(part, sizeof(part), "%s %02d%%",
 133                                (status == CS_CHARGING ? "CHR" :
 134                                 (status == CS_DISCHARGING ? "BAT" : "FULL")),
 135                                present_rate);
 136         }
 137 #endif
 138         return part;
 139 }