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
   7 #include "i3status.h"
   8
   9 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  10 #include <sys/types.h>
  11 #include <sys/sysctl.h>
  12 #endif
  13
  14 /*
  15  * Get battery information from /sys. Note that it uses the design capacity to
  16  * calculate the percentage, not the last full capacity, so you can see how
  17  * worn off your battery is.
  18  *
  19  */
  20 void print_battery_info(int number, const char *format, bool last_full_capacity) {
  21         time_t empty_time;
  22         struct tm *empty_tm;
  23         char buf[1024];
  24         char statusbuf[16];
  25         char percentagebuf[16];
  26         char remainingbuf[256];
  27         char emptytimebuf[256];
  28         const char *walk, *last;
  29         int full_design = -1,
  30             remaining = -1,
  31             present_rate = -1;
  32         charging_status_t status = CS_DISCHARGING;
  33
  34         memset(statusbuf, '\0', sizeof(statusbuf));
  35         memset(percentagebuf, '\0', sizeof(percentagebuf));
  36         memset(remainingbuf, '\0', sizeof(remainingbuf));
  37         memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  38
  39 #if defined(LINUX)
  40         static char batpath[512];
  41         sprintf(batpath, "/sys/class/power_supply/BAT%d/uevent", number);
  42         if (!slurp(batpath, buf, sizeof(buf))) {
  43                 printf("No battery");
  44                 return;
  45         }
  46
  47         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  48                 if (*walk == '\n') {
  49                         last = walk+1;
  50                         continue;
  51                 }
  52
  53                 if (*walk != '=')
  54                         continue;
  55
  56                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  57                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  58                         remaining = atoi(walk+1);
  59                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  60                         present_rate = atoi(walk+1);
  61                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  62                         status = CS_CHARGING;
  63                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  64                         status = CS_FULL;
  65                 else {
  66                         /* The only thing left is the full capacity */
  67                         if (last_full_capacity) {
  68                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  69                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  70                                         continue;
  71                         } else {
  72                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  73                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  74                                         continue;
  75                         }
  76
  77                         full_design = atoi(walk+1);
  78                 }
  79         }
  80
  81         if ((full_design == 1) || (remaining == -1))
  82                 return;
  83
  84         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  85                         (status == CS_CHARGING ? "CHR" :
  86                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
  87
  88         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
  89                        (((float)remaining / (float)full_design) * 100));
  90
  91         if (present_rate > 0) {
  92                 float remaining_time;
  93                 int seconds, hours, minutes, seconds_remaining;
  94                 if (status == CS_CHARGING)
  95                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
  96                 else if (status == CS_DISCHARGING)
  97                         remaining_time = ((float)remaining / (float)present_rate);
  98                 else remaining_time = 0;
  99
 100                 seconds_remaining = (int)(remaining_time * 3600.0);
 101
 102                 hours = seconds_remaining / 3600;
 103                 seconds = seconds_remaining - (hours * 3600);
 104                 minutes = seconds / 60;
 105                 seconds -= (minutes * 60);
 106
 107                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 108                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 109
 110                 empty_time = time(NULL);
 111                 empty_time += seconds_remaining;
 112                 empty_tm = localtime(&empty_time);
 113
 114                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 115                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 116         }
 117 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 118         int state;
 119         int sysctl_rslt;
 120         size_t sysctl_size = sizeof(sysctl_rslt);
 121
 122         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 123                 printf("No battery");
 124                 return;
 125         }
 126
 127         present_rate = sysctl_rslt;
 128         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 129                 printf("No battery");
 130                 return;
 131         }
 132
 133         remaining = sysctl_rslt;
 134         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 135                 printf("No battery");
 136                 return;
 137         }
 138
 139         state = sysctl_rslt;
 140         if (state == 0 && present_rate == 100)
 141                 status = CS_FULL;
 142         else if (state == 0 && present_rate < 100)
 143                 status = CS_CHARGING;
 144         else
 145                 status = CS_DISCHARGING;
 146
 147         full_design = sysctl_rslt;
 148
 149         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 150                         (status == CS_CHARGING ? "CHR" :
 151                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 152
 153         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 154                        present_rate);
 155
 156         if (state == 1) {
 157                 int hours, minutes;
 158                 minutes = remaining;
 159                 hours = minutes / 60;
 160                 minutes -= (hours * 60);
 161                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 162                                max(hours, 0), max(minutes, 0));
 163         }
 164 #endif
 165
 166         for (walk = format; *walk != '\0'; walk++) {
 167                 if (*walk != '%') {
 168                         putchar(*walk);
 169                         continue;
 170                 }
 171
 172                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 173                         printf("%s", statusbuf);
 174                         walk += strlen("status");
 175                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 176                         printf("%s", percentagebuf);
 177                         walk += strlen("percentage");
 178                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 179                         printf("%s", remainingbuf);
 180                         walk += strlen("remaining");
 181                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 182                         printf("%s", emptytimebuf);
 183                         walk += strlen("emptytime");
 184                 }
 185         }
 186 }