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Support energy_now/power_now in battery_remaining

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On some laptops (mostly thinkpads), the remaining time may be
expressed in µWh using energy_now and power_now files rather than µAh
for charge_now and current_now.

Add pick function to conditionally select appropriate one.
This commit is contained in:
David Demelier
2018-05-20 09:42:16 +02:00
committed by Aaron Marcher
parent 1cd8a7b510
commit f386a03a20
1 changed files with 27 additions and 14 deletions
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41
components/battery.c
View File

@@ -7,6 +7,26 @@
#if defined(__linux__)
#include <limits.h>
#include <unistd.h>
#define CHARGE_NOW "/sys/class/power_supply/%s/charge_now"
#define ENERGY_NOW "/sys/class/power_supply/%s/energy_now"
#define CURRENT_NOW "/sys/class/power_supply/%s/current_now"
#define POWER_NOW "/sys/class/power_supply/%s/power_now"
static const char *
pick(const char *bat, const char *f1, const char *f2, char *path, size_t length)
{
if (esnprintf(path, length, f1, bat) > 0 && access(path, R_OK) == 0) {
return f1;
}
if (esnprintf(path, length, f2, bat) > 0 && access(path, R_OK) == 0) {
return f2;
}
return NULL;
}
const char *
battery_perc(const char *bat)
@@ -72,21 +92,14 @@
return NULL;
}
if (pick(bat, CHARGE_NOW, ENERGY_NOW, path, sizeof (path)) == NULL ||
pscanf(path, "%d", &charge_now) < 0) {
return NULL;
}
if (!strcmp(state, "Discharging")) {
if (esnprintf(path, sizeof(path),
"/sys/class/power_supply/%s/charge_now",
bat) < 0) {
return NULL;
}
if (pscanf(path, "%d", &charge_now) != 1) {
return NULL;
}
if (esnprintf(path, sizeof(path),
"/sys/class/power_supply/%s/current_now",
bat) < 0) {
return NULL;
}
if (pscanf(path, "%d", &current_now) != 1) {
if (pick(bat, CURRENT_NOW, POWER_NOW, path, sizeof (path)) == NULL ||
pscanf(path, "%d", &current_now) < 0) {
return NULL;
}