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