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 #include <yajl/yajl_version.h>
   8
   9 #include "i3status.h"
  10
  11 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  12 #include <sys/types.h>
  13 #include <sys/sysctl.h>
  14 #endif
  15
  16 #if defined(__OpenBSD__)
  17 #include <sys/types.h>
  18 #include <sys/ioctl.h>
  19 #include <sys/fcntl.h>
  20 #include <machine/apmvar.h>
  21 #endif
  22
  23 /*
  24  * Get battery information from /sys. Note that it uses the design capacity to
  25  * calculate the percentage, not the last full capacity, so you can see how
  26  * worn off your battery is.
  27  *
  28  */
  29 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, bool last_full_capacity) {
  30         time_t empty_time;
  31         struct tm *empty_tm;
  32         char buf[1024];
  33         char statusbuf[16];
  34         char percentagebuf[16];
  35         char remainingbuf[256];
  36         char emptytimebuf[256];
  37         const char *walk, *last;
  38         char *outwalk = buffer;
  39         int full_design = -1,
  40             remaining = -1,
  41             present_rate = -1;
  42         charging_status_t status = CS_DISCHARGING;
  43
  44         memset(statusbuf, '\0', sizeof(statusbuf));
  45         memset(percentagebuf, '\0', sizeof(percentagebuf));
  46         memset(remainingbuf, '\0', sizeof(remainingbuf));
  47         memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  48
  49         INSTANCE(path);
  50
  51 #if defined(LINUX)
  52         static char batpath[512];
  53         sprintf(batpath, path, number);
  54         if (!slurp(batpath, buf, sizeof(buf))) {
  55                 OUTPUT_FULL_TEXT("No battery");
  56                 return;
  57         }
  58
  59         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  60                 if (*walk == '\n') {
  61                         last = walk+1;
  62                         continue;
  63                 }
  64
  65                 if (*walk != '=')
  66                         continue;
  67
  68                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  69                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  70                         remaining = atoi(walk+1);
  71                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  72                         present_rate = atoi(walk+1);
  73                 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  74                         present_rate = atoi(walk+1);
  75                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  76                         status = CS_CHARGING;
  77                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  78                         status = CS_FULL;
  79                 else {
  80                         /* The only thing left is the full capacity */
  81                         if (last_full_capacity) {
  82                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  83                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  84                                         continue;
  85                         } else {
  86                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  87                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  88                                         continue;
  89                         }
  90
  91                         full_design = atoi(walk+1);
  92                 }
  93         }
  94
  95         if ((full_design == 1) || (remaining == -1))
  96                 return;
  97
  98         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
  99                         (status == CS_CHARGING ? "CHR" :
 100                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 101
 102         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
 103                        (((float)remaining / (float)full_design) * 100));
 104
 105         if (present_rate > 0) {
 106                 float remaining_time;
 107                 int seconds, hours, minutes, seconds_remaining;
 108                 if (status == CS_CHARGING)
 109                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 110                 else if (status == CS_DISCHARGING)
 111                         remaining_time = ((float)remaining / (float)present_rate);
 112                 else remaining_time = 0;
 113
 114                 seconds_remaining = (int)(remaining_time * 3600.0);
 115
 116                 hours = seconds_remaining / 3600;
 117                 seconds = seconds_remaining - (hours * 3600);
 118                 minutes = seconds / 60;
 119                 seconds -= (minutes * 60);
 120
 121                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 122                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 123
 124                 empty_time = time(NULL);
 125                 empty_time += seconds_remaining;
 126                 empty_tm = localtime(&empty_time);
 127
 128                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 129                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 130         }
 131 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 132         int state;
 133         int sysctl_rslt;
 134         size_t sysctl_size = sizeof(sysctl_rslt);
 135
 136         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 137                 printf("No battery");
 138                 return;
 139         }
 140
 141         present_rate = sysctl_rslt;
 142         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 143                 printf("No battery");
 144                 return;
 145         }
 146
 147         remaining = sysctl_rslt;
 148         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 149                 printf("No battery");
 150                 return;
 151         }
 152
 153         state = sysctl_rslt;
 154         if (state == 0 && present_rate == 100)
 155                 status = CS_FULL;
 156         else if (state == 0 && present_rate < 100)
 157                 status = CS_CHARGING;
 158         else
 159                 status = CS_DISCHARGING;
 160
 161         full_design = sysctl_rslt;
 162
 163         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 164                         (status == CS_CHARGING ? "CHR" :
 165                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 166
 167         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 168                        present_rate);
 169
 170         if (state == 1) {
 171                 int hours, minutes;
 172                 minutes = remaining;
 173                 hours = minutes / 60;
 174                 minutes -= (hours * 60);
 175                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 176                                max(hours, 0), max(minutes, 0));
 177         }
 178 #elif defined(__OpenBSD__)
 179         /*
 180          * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
 181          * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
 182          * probing acpi(4) devices.
 183          */
 184         struct apm_power_info apm_info;
 185         int apm_fd, ac_status, charging;
 186
 187         apm_fd = open("/dev/apm", O_RDONLY);
 188         if (apm_fd < 0) {
 189                 OUTPUT_FULL_TEXT("can't open /dev/apm");
 190                 return;
 191         }
 192         if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
 193                 OUTPUT_FULL_TEXT("can't read power info");
 194
 195         close(apm_fd);
 196
 197         /* Don't bother to go further if there's no battery present. */
 198         if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
 199             (apm_info.battery_state == APM_BATT_UNKNOWN)) {
 200                 OUTPUT_FULL_TEXT("No battery");
 201                 return;
 202         }
 203
 204         switch(apm_info.ac_state) {
 205         case APM_AC_OFF:
 206                 ac_status = CS_DISCHARGING;
 207                 break;
 208         case APM_AC_ON:
 209                 ac_status = CS_CHARGING;
 210                 break;
 211         default:
 212                 /* If we don't know what's going on, just assume we're discharging. */
 213                 ac_status = CS_DISCHARGING;
 214                 break;
 215         }
 216
 217         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 218                        (ac_status == CS_CHARGING ? "CHR" :
 219                         (ac_status == CS_DISCHARGING ? "BAT" : "FULL")));
 220
 221         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%", apm_info.battery_life);
 222
 223         /* Can't give a meaningful value for remaining minutes if we're charging. */
 224         if (ac_status == CS_CHARGING)
 225                 charging = 1;
 226
 227         (void)snprintf(remainingbuf, sizeof(remainingbuf), (charging ? "%s" : "%d"),
 228                        (charging ? "(CHR)" : apm_info.minutes_left));
 229 #endif
 230
 231         for (walk = format; *walk != '\0'; walk++) {
 232                 if (*walk != '%') {
 233                         *(outwalk++) = *walk;
 234                         continue;
 235                 }
 236
 237                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 238                         outwalk += sprintf(outwalk, "%s", statusbuf);
 239                         walk += strlen("status");
 240                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 241                         outwalk += sprintf(outwalk, "%s", percentagebuf);
 242                         walk += strlen("percentage");
 243                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 244                         outwalk += sprintf(outwalk, "%s", remainingbuf);
 245                         walk += strlen("remaining");
 246                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 247                         outwalk += sprintf(outwalk, "%s", emptytimebuf);
 248                         walk += strlen("emptytime");
 249                 }
 250         }
 251
 252         OUTPUT_FULL_TEXT(buffer);
 253 }