components/battery.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <errno.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5
   6 #include "../util.h"
   7
   8 #if defined(__linux__)
   9         #include <limits.h>
  10
  11         const char *
  12         battery_perc(const char *bat)
  13         {
  14                 int perc;
  15                 char path[PATH_MAX];
  16
  17                 snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
  18                          bat, "/capacity");
  19                 return (pscanf(path, "%i", &perc) == 1) ?
  20                        bprintf("%d", perc) : NULL;
  21         }
  22
  23         const char *
  24         battery_state(const char *bat)
  25         {
  26                 struct {
  27                         char *state;
  28                         char *symbol;
  29                 } map[] = {
  30                         { "Charging",    "+" },
  31                         { "Discharging", "-" },
  32                         { "Full",        "=" },
  33                 };
  34                 size_t i;
  35                 char path[PATH_MAX], state[12];
  36
  37                 snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
  38                          bat, "/status");
  39                 if (pscanf(path, "%12s", state) != 1) {
  40                         return NULL;
  41                 }
  42
  43                 for (i = 0; i < LEN(map); i++) {
  44                         if (!strcmp(map[i].state, state)) {
  45                                 break;
  46                         }
  47                 }
  48                 return (i == LEN(map)) ? "?" : map[i].symbol;
  49         }
  50 #elif defined(__OpenBSD__)
  51         #include <fcntl.h>
  52         #include <machine/apmvar.h>
  53         #include <sys/ioctl.h>
  54         #include <unistd.h>
  55
  56         const char *
  57         battery_perc(const char *null)
  58         {
  59                 struct apm_power_info apm_info;
  60                 int fd;
  61
  62                 fd = open("/dev/apm", O_RDONLY);
  63                 if (fd < 0) {
  64                         fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
  65                         return NULL;
  66                 }
  67
  68                 if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
  69                         fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n",
  70                                 strerror(errno));
  71                         close(fd);
  72                         return NULL;
  73                 }
  74                 close(fd);
  75
  76                 return bprintf("%d", apm_info.battery_life);
  77         }
  78
  79         const char *
  80         battery_state(const char *bat)
  81         {
  82                 int fd;
  83                 size_t i;
  84                 struct apm_power_info apm_info;
  85                 struct {
  86                         unsigned int state;
  87                         char *symbol;
  88                 } map[] = {
  89                         { APM_AC_ON,      "+" },
  90                         { APM_AC_OFF,     "-" },
  91                 };
  92
  93                 fd = open("/dev/apm", O_RDONLY);
  94                 if (fd < 0) {
  95                         fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
  96                         return NULL;
  97                 }
  98
  99                 if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
 100                         fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n",
 101                                 strerror(errno));
 102                         close(fd);
 103                         return NULL;
 104                 }
 105                 close(fd);
 106
 107                 for (i = 0; i < LEN(map); i++) {
 108                         if (map[i].state == apm_info.ac_state) {
 109                                 break;
 110                         }
 111                 }
 112                 return (i == LEN(map)) ? "?" : map[i].symbol;
 113         }
 114 #endif