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 #include <yajl/yajl_gen.h>
   7
   8 #include "i3status.h"
   9
  10 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  11 #include <sys/types.h>
  12 #include <sys/sysctl.h>
  13 #endif
  14
  15 /*
  16  * Get battery information from /sys. Note that it uses the design capacity to
  17  * calculate the percentage, not the last full capacity, so you can see how
  18  * worn off your battery is.
  19  *
  20  */
  21 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, bool last_full_capacity) {
  22         time_t empty_time;
  23         struct tm *empty_tm;
  24         char buf[1024];
  25         char statusbuf[16];
  26         char percentagebuf[16];
  27         char remainingbuf[256];
  28         char emptytimebuf[256];
  29         const char *walk, *last;
  30         char *outwalk = buffer;
  31         int full_design = -1,
  32             remaining = -1,
  33             present_rate = -1;
  34         charging_status_t status = CS_DISCHARGING;
  35
  36         memset(statusbuf, '\0', sizeof(statusbuf));
  37         memset(percentagebuf, '\0', sizeof(percentagebuf));
  38         memset(remainingbuf, '\0', sizeof(remainingbuf));
  39         memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  40
  41         INSTANCE(path);
  42
  43 #if defined(LINUX)
  44         static char batpath[512];
  45         sprintf(batpath, path, number);
  46         if (!slurp(batpath, buf, sizeof(buf))) {
  47                 OUTPUT_FULL_TEXT("No battery");
  48                 return;
  49         }
  50
  51         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  52                 if (*walk == '\n') {
  53                         last = walk+1;
  54                         continue;
  55                 }
  56
  57                 if (*walk != '=')
  58                         continue;
  59
  60                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  61                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  62                         remaining = atoi(walk+1);
  63                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  64                         present_rate = atoi(walk+1);
  65                 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  66                         present_rate = atoi(walk+1);
  67                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  68                         status = CS_CHARGING;
  69                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  70                         status = CS_FULL;
  71                 else {
  72                         /* The only thing left is the full capacity */
  73                         if (last_full_capacity) {
  74                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  75                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  76                                         continue;
  77                         } else {
  78                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  79                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  80                                         continue;
  81                         }
  82
  83                         full_design = atoi(walk+1);
  84                 }
  85         }
  86
  87         if ((full_design == 1) || (remaining == -1))
  88                 return;
  89
  90         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  91                         (status == CS_CHARGING ? "CHR" :
  92                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
  93
  94         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
  95                        (((float)remaining / (float)full_design) * 100));
  96
  97         if (present_rate > 0) {
  98                 float remaining_time;
  99                 int seconds, hours, minutes, seconds_remaining;
 100                 if (status == CS_CHARGING)
 101                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 102                 else if (status == CS_DISCHARGING)
 103                         remaining_time = ((float)remaining / (float)present_rate);
 104                 else remaining_time = 0;
 105
 106                 seconds_remaining = (int)(remaining_time * 3600.0);
 107
 108                 hours = seconds_remaining / 3600;
 109                 seconds = seconds_remaining - (hours * 3600);
 110                 minutes = seconds / 60;
 111                 seconds -= (minutes * 60);
 112
 113                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 114                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 115
 116                 empty_time = time(NULL);
 117                 empty_time += seconds_remaining;
 118                 empty_tm = localtime(&empty_time);
 119
 120                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 121                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 122         }
 123 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 124         int state;
 125         int sysctl_rslt;
 126         size_t sysctl_size = sizeof(sysctl_rslt);
 127
 128         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 129                 printf("No battery");
 130                 return;
 131         }
 132
 133         present_rate = sysctl_rslt;
 134         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 135                 printf("No battery");
 136                 return;
 137         }
 138
 139         remaining = sysctl_rslt;
 140         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 141                 printf("No battery");
 142                 return;
 143         }
 144
 145         state = sysctl_rslt;
 146         if (state == 0 && present_rate == 100)
 147                 status = CS_FULL;
 148         else if (state == 0 && present_rate < 100)
 149                 status = CS_CHARGING;
 150         else
 151                 status = CS_DISCHARGING;
 152
 153         full_design = sysctl_rslt;
 154
 155         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 156                         (status == CS_CHARGING ? "CHR" :
 157                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 158
 159         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 160                        present_rate);
 161
 162         if (state == 1) {
 163                 int hours, minutes;
 164                 minutes = remaining;
 165                 hours = minutes / 60;
 166                 minutes -= (hours * 60);
 167                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 168                                max(hours, 0), max(minutes, 0));
 169         }
 170 #endif
 171
 172         for (walk = format; *walk != '\0'; walk++) {
 173                 if (*walk != '%') {
 174                         *(outwalk++) = *walk;
 175                         continue;
 176                 }
 177
 178                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 179                         outwalk += sprintf(outwalk, "%s", statusbuf);
 180                         walk += strlen("status");
 181                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 182                         outwalk += sprintf(outwalk, "%s", percentagebuf);
 183                         walk += strlen("percentage");
 184                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 185                         outwalk += sprintf(outwalk, "%s", remainingbuf);
 186                         walk += strlen("remaining");
 187                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 188                         outwalk += sprintf(outwalk, "%s", emptytimebuf);
 189                         walk += strlen("emptytime");
 190                 }
 191         }
 192
 193         OUTPUT_FULL_TEXT(buffer);
 194 }