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 *path, 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, path, 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_POWER_NOW"))
  62                         present_rate = atoi(walk+1);
  63                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  64                         status = CS_CHARGING;
  65                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  66                         status = CS_FULL;
  67                 else {
  68                         /* The only thing left is the full capacity */
  69                         if (last_full_capacity) {
  70                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  71                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  72                                         continue;
  73                         } else {
  74                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  75                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  76                                         continue;
  77                         }
  78
  79                         full_design = atoi(walk+1);
  80                 }
  81         }
  82
  83         if ((full_design == 1) || (remaining == -1))
  84                 return;
  85
  86         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  87                         (status == CS_CHARGING ? "CHR" :
  88                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
  89
  90         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
  91                        (((float)remaining / (float)full_design) * 100));
  92
  93         if (present_rate > 0) {
  94                 float remaining_time;
  95                 int seconds, hours, minutes, seconds_remaining;
  96                 if (status == CS_CHARGING)
  97                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
  98                 else if (status == CS_DISCHARGING)
  99                         remaining_time = ((float)remaining / (float)present_rate);
 100                 else remaining_time = 0;
 101
 102                 seconds_remaining = (int)(remaining_time * 3600.0);
 103
 104                 hours = seconds_remaining / 3600;
 105                 seconds = seconds_remaining - (hours * 3600);
 106                 minutes = seconds / 60;
 107                 seconds -= (minutes * 60);
 108
 109                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 110                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 111
 112                 empty_time = time(NULL);
 113                 empty_time += seconds_remaining;
 114                 empty_tm = localtime(&empty_time);
 115
 116                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 117                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 118         }
 119 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 120         int state;
 121         int sysctl_rslt;
 122         size_t sysctl_size = sizeof(sysctl_rslt);
 123
 124         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 125                 printf("No battery");
 126                 return;
 127         }
 128
 129         present_rate = sysctl_rslt;
 130         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 131                 printf("No battery");
 132                 return;
 133         }
 134
 135         remaining = sysctl_rslt;
 136         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 137                 printf("No battery");
 138                 return;
 139         }
 140
 141         state = sysctl_rslt;
 142         if (state == 0 && present_rate == 100)
 143                 status = CS_FULL;
 144         else if (state == 0 && present_rate < 100)
 145                 status = CS_CHARGING;
 146         else
 147                 status = CS_DISCHARGING;
 148
 149         full_design = sysctl_rslt;
 150
 151         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 152                         (status == CS_CHARGING ? "CHR" :
 153                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 154
 155         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 156                        present_rate);
 157
 158         if (state == 1) {
 159                 int hours, minutes;
 160                 minutes = remaining;
 161                 hours = minutes / 60;
 162                 minutes -= (hours * 60);
 163                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 164                                max(hours, 0), max(minutes, 0));
 165         }
 166 #endif
 167
 168         for (walk = format; *walk != '\0'; walk++) {
 169                 if (*walk != '%') {
 170                         putchar(*walk);
 171                         continue;
 172                 }
 173
 174                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 175                         printf("%s", statusbuf);
 176                         walk += strlen("status");
 177                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 178                         printf("%s", percentagebuf);
 179                         walk += strlen("percentage");
 180                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 181                         printf("%s", remainingbuf);
 182                         walk += strlen("remaining");
 183                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 184                         printf("%s", emptytimebuf);
 185                         walk += strlen("emptytime");
 186                 }
 187         }
 188 }