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// vim:ts=8:expandtab
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "i3status.h"
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
/*
* Get battery information from /sys. Note that it uses the design capacity to
* calculate the percentage, not the last full capacity, so you can see how
* worn off your battery is.
*
*/
void print_battery_info(int number, const char *format, bool last_full_capacity) {
time_t empty_time;
struct tm *empty_tm;
char buf[1024];
char statusbuf[16];
char percentagebuf[16];
char remainingbuf[256];
char emptytimebuf[256];
const char *walk, *last;
int full_design = -1,
remaining = -1,
present_rate = -1;
charging_status_t status = CS_DISCHARGING;
memset(statusbuf, '\0', sizeof(statusbuf));
memset(percentagebuf, '\0', sizeof(percentagebuf));
memset(remainingbuf, '\0', sizeof(remainingbuf));
memset(emptytimebuf, '\0', sizeof(emptytimebuf));
#if defined(LINUX)
static char batpath[512];
sprintf(batpath, "/sys/class/power_supply/BAT%d/uevent", number);
if (!slurp(batpath, buf, sizeof(buf))) {
printf("No battery");
return;
}
for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
if (*walk == '\n') {
last = walk+1;
continue;
}
if (*walk != '=')
continue;
if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
remaining = atoi(walk+1);
else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
present_rate = atoi(walk+1);
else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
present_rate = atoi(walk+1);
else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
status = CS_CHARGING;
else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
status = CS_FULL;
else {
/* The only thing left is the full capacity */
if (last_full_capacity) {
if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
continue;
} else {
if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
continue;
}
full_design = atoi(walk+1);
}
}
if ((full_design == 1) || (remaining == -1))
return;
(void)snprintf(statusbuf, sizeof(statusbuf), "%s",
(status == CS_CHARGING ? "CHR" :
(status == CS_DISCHARGING ? "BAT" : "FULL")));
(void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%%",
(((float)remaining / (float)full_design) * 100));
if (present_rate > 0) {
float remaining_time;
int seconds, hours, minutes, seconds_remaining;
if (status == CS_CHARGING)
remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
else if (status == CS_DISCHARGING)
remaining_time = ((float)remaining / (float)present_rate);
else remaining_time = 0;
seconds_remaining = (int)(remaining_time * 3600.0);
hours = seconds_remaining / 3600;
seconds = seconds_remaining - (hours * 3600);
minutes = seconds / 60;
seconds -= (minutes * 60);
(void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
max(hours, 0), max(minutes, 0), max(seconds, 0));
empty_time = time(NULL);
empty_time += seconds_remaining;
empty_tm = localtime(&empty_time);
(void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
}
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
int state;
int sysctl_rslt;
size_t sysctl_size = sizeof(sysctl_rslt);
if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
printf("No battery");
return;
}
present_rate = sysctl_rslt;
if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
printf("No battery");
return;
}
remaining = sysctl_rslt;
if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL,0) != 0) {
printf("No battery");
return;
}
state = sysctl_rslt;
if (state == 0 && present_rate == 100)
status = CS_FULL;
else if (state == 0 && present_rate < 100)
status = CS_CHARGING;
else
status = CS_DISCHARGING;
full_design = sysctl_rslt;
(void)snprintf(statusbuf, sizeof(statusbuf), "%s",
(status == CS_CHARGING ? "CHR" :
(status == CS_DISCHARGING ? "BAT" : "FULL")));
(void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%%",
present_rate);
if (state == 1) {
int hours, minutes;
minutes = remaining;
hours = minutes / 60;
minutes -= (hours * 60);
(void)snprintf(remainingbuf, sizeof(remainingbuf), "%02dh%02d",
max(hours, 0), max(minutes, 0));
}
#endif
for (walk = format; *walk != '\0'; walk++) {
if (*walk != '%') {
putchar(*walk);
continue;
}
if (strncmp(walk+1, "status", strlen("status")) == 0) {
printf("%s", statusbuf);
walk += strlen("status");
} else if (strncmp(walk+1, "percentage", strlen("percentage")) == 0) {
printf("%s", percentagebuf);
walk += strlen("percentage");
} else if (strncmp(walk+1, "remaining", strlen("remaining")) == 0) {
printf("%s", remainingbuf);
walk += strlen("remaining");
} else if (strncmp(walk+1, "emptytime", strlen("emptytime")) == 0) {
printf("%s", emptytimebuf);
walk += strlen("emptytime");
}
}
}
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