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 #define BATT_STATUS_NAME(status) \
  24     (status == CS_CHARGING ? "CHR" : \
  25         (status == CS_DISCHARGING ? "BAT" : "FULL"))
  26 /*
  27  * Get battery information from /sys. Note that it uses the design capacity to
  28  * calculate the percentage, not the last full capacity, so you can see how
  29  * worn off your battery is.
  30  *
  31  */
  32 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, int threshold, bool last_full_capacity) {
  33         time_t empty_time;
  34         struct tm *empty_tm;
  35         char buf[1024];
  36         char statusbuf[16];
  37         char percentagebuf[16];
  38         char remainingbuf[256];
  39         char emptytimebuf[256];
  40         char consumptionbuf[256];
  41         const char *walk, *last;
  42         char *outwalk = buffer;
  43         int full_design = -1,
  44             remaining = -1,
  45             present_rate = -1;
  46         charging_status_t status = CS_DISCHARGING;
  47
  48         memset(statusbuf, '\0', sizeof(statusbuf));
  49         memset(percentagebuf, '\0', sizeof(percentagebuf));
  50         memset(remainingbuf, '\0', sizeof(remainingbuf));
  51         memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  52         memset(consumptionbuf, '\0', sizeof(consumptionbuf));
  53
  54         INSTANCE(path);
  55
  56 #if defined(LINUX)
  57         static char batpath[512];
  58         sprintf(batpath, path, number);
  59         if (!slurp(batpath, buf, sizeof(buf))) {
  60                 OUTPUT_FULL_TEXT("No battery");
  61                 return;
  62         }
  63
  64         for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
  65                 if (*walk == '\n') {
  66                         last = walk+1;
  67                         continue;
  68                 }
  69
  70                 if (*walk != '=')
  71                         continue;
  72
  73                 if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
  74                     BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
  75                         remaining = atoi(walk+1);
  76                 else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  77                         present_rate = atoi(walk+1);
  78                 else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  79                         present_rate = atoi(walk+1);
  80                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
  81                         status = CS_CHARGING;
  82                 else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
  83                         status = CS_FULL;
  84                 else {
  85                         /* The only thing left is the full capacity */
  86                         if (last_full_capacity) {
  87                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
  88                                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
  89                                         continue;
  90                         } else {
  91                                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
  92                                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
  93                                         continue;
  94                         }
  95
  96                         full_design = atoi(walk+1);
  97                 }
  98         }
  99
 100         if ((full_design == -1) || (remaining == -1)) {
 101                 OUTPUT_FULL_TEXT("No battery");
 102                 return;
 103         }
 104
 105         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 106
 107         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
 108                        (((float)remaining / (float)full_design) * 100));
 109
 110         if (present_rate > 0) {
 111                 float remaining_time;
 112                 int seconds, hours, minutes, seconds_remaining;
 113                 if (status == CS_CHARGING)
 114                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 115                 else if (status == CS_DISCHARGING)
 116                         remaining_time = ((float)remaining / (float)present_rate);
 117                 else remaining_time = 0;
 118
 119                 seconds_remaining = (int)(remaining_time * 3600.0);
 120
 121                 hours = seconds_remaining / 3600;
 122                 seconds = seconds_remaining - (hours * 3600);
 123                 minutes = seconds / 60;
 124                 seconds -= (minutes * 60);
 125
 126                 if (status == CS_DISCHARGING && threshold > 0 && seconds_remaining < 60 * threshold)
 127                         START_COLOR("color_bad");
 128
 129                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 130                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 131
 132                 empty_time = time(NULL);
 133                 empty_time += seconds_remaining;
 134                 empty_tm = localtime(&empty_time);
 135
 136                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 137                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 138
 139                 (void)snprintf(consumptionbuf, sizeof(consumptionbuf), "%1.2fW",
 140                         ((float)present_rate / 1000.0 / 1000.0));
 141
 142                 END_COLOR;
 143         }
 144 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 145         int state;
 146         int sysctl_rslt;
 147         size_t sysctl_size = sizeof(sysctl_rslt);
 148
 149         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 150                 OUTPUT_FULL_TEXT("No battery");
 151                 return;
 152         }
 153
 154         present_rate = sysctl_rslt;
 155         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 156                 OUTPUT_FULL_TEXT("No battery");
 157                 return;
 158         }
 159
 160         remaining = sysctl_rslt;
 161         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 162                 OUTPUT_FULL_TEXT("No battery");
 163                 return;
 164         }
 165
 166         state = sysctl_rslt;
 167         if (state == 0 && present_rate == 100)
 168                 status = CS_FULL;
 169         else if (state == 0 && present_rate < 100)
 170                 status = CS_CHARGING;
 171         else
 172                 status = CS_DISCHARGING;
 173
 174         full_design = sysctl_rslt;
 175
 176         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 177
 178         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 179                        present_rate);
 180
 181         if (state == 1) {
 182                 int hours, minutes;
 183                 minutes = remaining;
 184                 hours = minutes / 60;
 185                 minutes -= (hours * 60);
 186                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 187                                max(hours, 0), max(minutes, 0));
 188         }
 189 #elif defined(__OpenBSD__)
 190         /*
 191          * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
 192          * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
 193          * probing acpi(4) devices.
 194          */
 195         struct apm_power_info apm_info;
 196         int apm_fd, ac_status, charging;
 197
 198         apm_fd = open("/dev/apm", O_RDONLY);
 199         if (apm_fd < 0) {
 200                 OUTPUT_FULL_TEXT("can't open /dev/apm");
 201                 return;
 202         }
 203         if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
 204                 OUTPUT_FULL_TEXT("can't read power info");
 205
 206         close(apm_fd);
 207
 208         /* Don't bother to go further if there's no battery present. */
 209         if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
 210             (apm_info.battery_state == APM_BATT_UNKNOWN)) {
 211                 OUTPUT_FULL_TEXT("No battery");
 212                 return;
 213         }
 214
 215         switch(apm_info.ac_state) {
 216         case APM_AC_OFF:
 217                 ac_status = CS_DISCHARGING;
 218                 break;
 219         case APM_AC_ON:
 220                 ac_status = CS_CHARGING;
 221                 break;
 222         default:
 223                 /* If we don't know what's going on, just assume we're discharging. */
 224                 ac_status = CS_DISCHARGING;
 225                 break;
 226         }
 227
 228         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 229         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%", apm_info.battery_life);
 230
 231         /* Can't give a meaningful value for remaining minutes if we're charging. */
 232         if (ac_status == CS_CHARGING)
 233                 charging = 1;
 234
 235         (void)snprintf(remainingbuf, sizeof(remainingbuf), (charging ? "%s" : "%d"),
 236                        (charging ? "(CHR)" : apm_info.minutes_left));
 237 #endif
 238
 239         for (walk = format; *walk != '\0'; walk++) {
 240                 if (*walk != '%') {
 241                         *(outwalk++) = *walk;
 242                         continue;
 243                 }
 244
 245                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 246                         outwalk += sprintf(outwalk, "%s", statusbuf);
 247                         walk += strlen("status");
 248                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 249                         outwalk += sprintf(outwalk, "%s", percentagebuf);
 250                         walk += strlen("percentage");
 251                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 252                         outwalk += sprintf(outwalk, "%s", remainingbuf);
 253                         walk += strlen("remaining");
 254                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 255                         outwalk += sprintf(outwalk, "%s", emptytimebuf);
 256                         walk += strlen("emptytime");
 257                 } else if (strncmp(walk+1, "consumption", strlen("consumption")) == 0) {
 258                         outwalk += sprintf(outwalk, "%s", consumptionbuf);
 259                         walk += strlen("consumptionbuf");
 260                 }
 261         }
 262
 263         OUTPUT_FULL_TEXT(buffer);
 264 }