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                 OUTPUT_FULL_TEXT("No battery");
  97                 return;
  98         }
  99
 100         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 101                         (status == CS_CHARGING ? "CHR" :
 102                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 103
 104         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
 105                        (((float)remaining / (float)full_design) * 100));
 106
 107         if (present_rate > 0) {
 108                 float remaining_time;
 109                 int seconds, hours, minutes, seconds_remaining;
 110                 if (status == CS_CHARGING)
 111                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 112                 else if (status == CS_DISCHARGING)
 113                         remaining_time = ((float)remaining / (float)present_rate);
 114                 else remaining_time = 0;
 115
 116                 seconds_remaining = (int)(remaining_time * 3600.0);
 117
 118                 hours = seconds_remaining / 3600;
 119                 seconds = seconds_remaining - (hours * 3600);
 120                 minutes = seconds / 60;
 121                 seconds -= (minutes * 60);
 122
 123                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 124                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 125
 126                 empty_time = time(NULL);
 127                 empty_time += seconds_remaining;
 128                 empty_tm = localtime(&empty_time);
 129
 130                 (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 131                         max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 132         }
 133 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 134         int state;
 135         int sysctl_rslt;
 136         size_t sysctl_size = sizeof(sysctl_rslt);
 137
 138         if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 139                 OUTPUT_FULL_TEXT("No battery");
 140                 return;
 141         }
 142
 143         present_rate = sysctl_rslt;
 144         if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 145                 OUTPUT_FULL_TEXT("No battery");
 146                 return;
 147         }
 148
 149         remaining = sysctl_rslt;
 150         if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
 151                 OUTPUT_FULL_TEXT("No battery");
 152                 return;
 153         }
 154
 155         state = sysctl_rslt;
 156         if (state == 0 && present_rate == 100)
 157                 status = CS_FULL;
 158         else if (state == 0 && present_rate < 100)
 159                 status = CS_CHARGING;
 160         else
 161                 status = CS_DISCHARGING;
 162
 163         full_design = sysctl_rslt;
 164
 165         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 166                         (status == CS_CHARGING ? "CHR" :
 167                          (status == CS_DISCHARGING ? "BAT" : "FULL")));
 168
 169         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
 170                        present_rate);
 171
 172         if (state == 1) {
 173                 int hours, minutes;
 174                 minutes = remaining;
 175                 hours = minutes / 60;
 176                 minutes -= (hours * 60);
 177                 (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
 178                                max(hours, 0), max(minutes, 0));
 179         }
 180 #elif defined(__OpenBSD__)
 181         /*
 182          * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
 183          * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
 184          * probing acpi(4) devices.
 185          */
 186         struct apm_power_info apm_info;
 187         int apm_fd, ac_status, charging;
 188
 189         apm_fd = open("/dev/apm", O_RDONLY);
 190         if (apm_fd < 0) {
 191                 OUTPUT_FULL_TEXT("can't open /dev/apm");
 192                 return;
 193         }
 194         if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
 195                 OUTPUT_FULL_TEXT("can't read power info");
 196
 197         close(apm_fd);
 198
 199         /* Don't bother to go further if there's no battery present. */
 200         if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
 201             (apm_info.battery_state == APM_BATT_UNKNOWN)) {
 202                 OUTPUT_FULL_TEXT("No battery");
 203                 return;
 204         }
 205
 206         switch(apm_info.ac_state) {
 207         case APM_AC_OFF:
 208                 ac_status = CS_DISCHARGING;
 209                 break;
 210         case APM_AC_ON:
 211                 ac_status = CS_CHARGING;
 212                 break;
 213         default:
 214                 /* If we don't know what's going on, just assume we're discharging. */
 215                 ac_status = CS_DISCHARGING;
 216                 break;
 217         }
 218
 219         (void)snprintf(statusbuf, sizeof(statusbuf), "%s",
 220                        (ac_status == CS_CHARGING ? "CHR" :
 221                         (ac_status == CS_DISCHARGING ? "BAT" : "FULL")));
 222
 223         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%", apm_info.battery_life);
 224
 225         /* Can't give a meaningful value for remaining minutes if we're charging. */
 226         if (ac_status == CS_CHARGING)
 227                 charging = 1;
 228
 229         (void)snprintf(remainingbuf, sizeof(remainingbuf), (charging ? "%s" : "%d"),
 230                        (charging ? "(CHR)" : apm_info.minutes_left));
 231 #endif
 232
 233         for (walk = format; *walk != '\0'; walk++) {
 234                 if (*walk != '%') {
 235                         *(outwalk++) = *walk;
 236                         continue;
 237                 }
 238
 239                 if (strncmp(walk+1, "status", strlen("status")) == 0) {
 240                         outwalk += sprintf(outwalk, "%s", statusbuf);
 241                         walk += strlen("status");
 242                 } else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
 243                         outwalk += sprintf(outwalk, "%s", percentagebuf);
 244                         walk += strlen("percentage");
 245                 } else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
 246                         outwalk += sprintf(outwalk, "%s", remainingbuf);
 247                         walk += strlen("remaining");
 248                 } else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
 249                         outwalk += sprintf(outwalk, "%s", emptytimebuf);
 250                         walk += strlen("emptytime");
 251                 }
 252         }
 253
 254         OUTPUT_FULL_TEXT(buffer);
 255 }