battery.c
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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/sysctl.h>
const char *bat_icons[] = {
"\uf58d", /* 0% */
"\uf579",
"\uf57a",
"\uf57b",
"\uf57c",
"\uf57d", /* 50% */
"\uf57e",
"\uf57f",
"\uf580",
"\uf581",
"\uf578", /* 100% */
};
int main() {
int life, state;
size_t len = sizeof(int);
if (sysctlbyname("hw.acpi.battery.state", &state, &len, NULL, 0) ||
sysctlbyname("hw.acpi.battery.life", &life, &len, NULL, 0)) {
puts("(no battery)");
exit(EXIT_FAILURE);
}
switch (state) {
case 0: /* fully charged */
printf("\uf583 Full");
break;
case 1: /* discharging */
printf("%s %d%%\n", bat_icons[life / 10], life);
break;
case 2: /* charging */
printf("\uf583 %d%%\n", life);
break;
case 7: /* disconnected */
printf("\uf492");
break;
default: /* unknown code */
printf("\uf590");
}
return EXIT_SUCCESS;
}