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 (output_format == O_I3BAR)
  40                 printf("{\"name\":\"battery\", \"instance\": \"%s\", \"full_text\":\"", path);
  41
  42 #if defined(LINUX)
  43         static char batpath[512];
  44         sprintf(batpath, path, number);
  45         if (!slurp(batpath, buf, sizeof(buf))) {
  46                 printf("No battery");
  47                 return;
  48         }
  49
  50         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  51                 if (*walk == '\n') {
  52                         last = walk+1;
  53                         continue;
  54                 }
  55
  56                 if (*walk != '=')
  57                         continue;
  58
  59                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  60                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  61                         remaining = atoi(walk+1);
  62                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  63                         present_rate = atoi(walk+1);
  64                 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  65                         present_rate = atoi(walk+1);
  66                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  67                         status = CS_CHARGING;
  68                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  69                         status = CS_FULL;
  70                 else {
  71                         /* The only thing left is the full capacity */
  72                         if (last_full_capacity) {
  73                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  74                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  75                                         continue;
  76                         } else {
  77                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  78                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  79                                         continue;
  80                         }
  81
  82                         full_design = atoi(walk+1);
  83                 }
  84         }
  85
  86         if ((full_design == 1) || (remaining == -1))
  87                 return;
  88
  89         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  90                         (status == CS_CHARGING ? "CHR" :
  91                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
  92
  93         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
  94                        (((float)remaining / (float)full_design) * 100));
  95
  96         if (present_rate > 0) {
  97                 float remaining_time;
  98                 int seconds, hours, minutes, seconds_remaining;
  99                 if (status == CS_CHARGING)
 100                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 101                 else if (status == CS_DISCHARGING)
 102                         remaining_time = ((float)remaining / (float)present_rate);
 103                 else remaining_time = 0;
 104
 105                 seconds_remaining = (int)(remaining_time * 3600.0);
 106
 107                 hours = seconds_remaining / 3600;
 108                 seconds = seconds_remaining - (hours * 3600);
 109                 minutes = seconds / 60;
 110                 seconds -= (minutes * 60);
 111
 112                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 113                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 114
 115                 empty_time = time(NULL);
 116                 empty_time += seconds_remaining;
 117                 empty_tm = localtime(&empty_time);
 118
 119                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 120                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 121         }
 122 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 123         int state;
 124         int sysctl_rslt;
 125         size_t sysctl_size = sizeof(sysctl_rslt);
 126
 127         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 128                 printf("No battery");
 129                 return;
 130         }
 131
 132         present_rate = sysctl_rslt;
 133         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 134                 printf("No battery");
 135                 return;
 136         }
 137
 138         remaining = sysctl_rslt;
 139         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 140                 printf("No battery");
 141                 return;
 142         }
 143
 144         state = sysctl_rslt;
 145         if (state == 0 && present_rate == 100)
 146                 status = CS_FULL;
 147         else if (state == 0 && present_rate < 100)
 148                 status = CS_CHARGING;
 149         else
 150                 status = CS_DISCHARGING;
 151
 152         full_design = sysctl_rslt;
 153
 154         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 155                         (status == CS_CHARGING ? "CHR" :
 156                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 157
 158         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 159                        present_rate);
 160
 161         if (state == 1) {
 162                 int hours, minutes;
 163                 minutes = remaining;
 164                 hours = minutes / 60;
 165                 minutes -= (hours * 60);
 166                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 167                                max(hours, 0), max(minutes, 0));
 168         }
 169 #endif
 170
 171         for (walk = format; *walk != '\0'; walk++) {
 172                 if (*walk != '%') {
 173                         putchar(*walk);
 174                         continue;
 175                 }
 176
 177                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 178                         printf("%s", statusbuf);
 179                         walk += strlen("status");
 180                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 181                         printf("%s", percentagebuf);
 182                         walk += strlen("percentage");
 183                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 184                         printf("%s", remainingbuf);
 185                         walk += strlen("remaining");
 186                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 187                         printf("%s", emptytimebuf);
 188                         walk += strlen("emptytime");
 189                 }
 190         }
 191
 192         if (output_format == O_I3BAR)
 193                 printf("\"}");
 194 }