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, bool last_full_capacity) {
  20         char buf[1024];
  21         char statusbuf[16];
  22         char remainingbuf[256];
  23         const char *walk, *last;
  24         int full_design = -1,
  25             remaining = -1,
  26             present_rate = -1;
  27         charging_status_t status = CS_DISCHARGING;
  28
  29         memset(statusbuf, '\0', sizeof(statusbuf));
  30         memset(remainingbuf, '\0', sizeof(remainingbuf));
  31
  32 #if defined(LINUX)
  33         static char batpath[512];
  34         sprintf(batpath, "/sys/class/power_supply/BAT%d/uevent", number);
  35         if (!slurp(batpath, buf, sizeof(buf))) {
  36                 printf("No battery");
  37                 return;
  38         }
  39
  40         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  41                 if (*walk == '\n') {
  42                         last = walk+1;
  43                         continue;
  44                 }
  45
  46                 if (*walk != '=')
  47                         continue;
  48
  49                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  50                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  51                         remaining = atoi(walk+1);
  52                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  53                         present_rate = atoi(walk+1);
  54                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  55                         status = CS_CHARGING;
  56                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  57                         status = CS_FULL;
  58                 else {
  59                         /* The only thing left is the full capacity */
  60                         if (last_full_capacity) {
  61                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  62                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  63                                         continue;
  64                         } else {
  65                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  66                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  67                                         continue;
  68                         }
  69
  70                         full_design = atoi(walk+1);
  71                 }
  72         }
  73
  74         if ((full_design == 1) || (remaining == -1))
  75                 return;
  76
  77         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  78                         (status == CS_CHARGING ? "CHR" :
  79                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
  80
  81         if (present_rate > 0) {
  82                 float remaining_time;
  83                 int seconds, hours, minutes;
  84                 if (status == CS_CHARGING)
  85                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
  86                 else if (status == CS_DISCHARGING)
  87                         remaining_time = ((float)remaining / (float)present_rate);
  88                 else remaining_time = 0;
  89
  90                 seconds = (int)(remaining_time * 3600.0);
  91                 hours = seconds / 3600;
  92                 seconds -= (hours * 3600);
  93                 minutes = seconds / 60;
  94                 seconds -= (minutes * 60);
  95
  96                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%.02f%% %02d:%02d:%02d",
  97                         (((float)remaining / (float)full_design) * 100),
  98                         max(hours, 0), max(minutes, 0), max(seconds, 0));
  99         } else {
 100                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%.02f%%", (((float)remaining / (float)full_design) * 100));
 101         }
 102 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 103         int state;
 104         int sysctl_rslt;
 105         size_t sysctl_size = sizeof(sysctl_rslt);
 106
 107         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 108                 printf("No battery");
 109                 return;
 110         }
 111
 112         present_rate = sysctl_rslt;
 113         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 114                 printf("No battery");
 115                 return;
 116         }
 117
 118         remaining = sysctl_rslt;
 119         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 120                 printf("No battery");
 121                 return;
 122         }
 123
 124         state = sysctl_rslt;
 125         if (state == 0 && present_rate == 100)
 126                 status = CS_FULL;
 127         else if (state == 0 && present_rate < 100)
 128                 status = CS_CHARGING;
 129         else
 130                 status = CS_DISCHARGING;
 131
 132         full_design = sysctl_rslt;
 133
 134         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 135                         (status == CS_CHARGING ? "CHR" :
 136                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 137
 138         if (state == 1) {
 139                 int hours, minutes;
 140                 minutes = remaining;
 141                 hours = minutes / 60;
 142                 minutes -= (hours * 60);
 143                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d%% %02dh%02d",
 144                                present_rate,
 145                                max(hours, 0), max(minutes, 0));
 146         } else {
 147                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d%%",
 148                                present_rate);
 149         }
 150 #endif
 151
 152         for (walk = format; *walk != '\0'; walk++) {
 153                 if (*walk != '%') {
 154                         putchar(*walk);
 155                         continue;
 156                 }
 157
 158                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 159                         printf("%s", statusbuf);
 160                         walk += strlen("status");
 161                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 162                         printf("%s", remainingbuf);
 163                         walk += strlen("remaining");
 164                 }
 165         }
 166 }