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godot/platform/x11/power_x11.cpp

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/*************************************************************************/
/* power_x11.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
/*
Adapted from corresponding SDL 2.0 code.
*/
/*
* Simple DirectMedia Layer
* Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "power_x11.h"
#include <stdio.h>
#include <unistd.h>
#include "core/error_macros.h"
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
// CODE CHUNK IMPORTED FROM SDL 2.0
static const char *proc_apm_path = "/proc/apm";
static const char *proc_acpi_battery_path = "/proc/acpi/battery";
static const char *proc_acpi_ac_adapter_path = "/proc/acpi/ac_adapter";
static const char *sys_class_power_supply_path = "/sys/class/power_supply";
FileAccessRef PowerX11::open_power_file(const char *base, const char *node, const char *key) {
String path = String(base) + String("/") + String(node) + String("/") + String(key);
FileAccessRef f = FileAccess::open(path, FileAccess::READ);
return f;
}
bool PowerX11::read_power_file(const char *base, const char *node, const char *key, char *buf, size_t buflen) {
FileAccessRef fd = open_power_file(base, node, key);
if (!fd) {
return false;
}
uint64_t br = fd->get_buffer(reinterpret_cast<uint8_t *>(buf), buflen - 1);
fd->close();
buf[br] = '\0'; // null-terminate the string
return true;
}
bool PowerX11::make_proc_acpi_key_val(char **_ptr, char **_key, char **_val) {
char *ptr = *_ptr;
while (*ptr == ' ') {
ptr++; /* skip whitespace. */
}
if (*ptr == '\0') {
return false; /* EOF. */
}
*_key = ptr;
while ((*ptr != ':') && (*ptr != '\0')) {
ptr++;
}
if (*ptr == '\0') {
return false; /* (unexpected) EOF. */
}
*(ptr++) = '\0'; /* terminate the key. */
while (*ptr == ' ') {
ptr++; /* skip whitespace. */
}
if (*ptr == '\0') {
return false; /* (unexpected) EOF. */
}
*_val = ptr;
while ((*ptr != '\n') && (*ptr != '\0')) {
ptr++;
}
if (*ptr != '\0') {
*(ptr++) = '\0'; /* terminate the value. */
}
*_ptr = ptr; /* store for next time. */
return true;
}
void PowerX11::check_proc_acpi_battery(const char *node, bool *have_battery, bool *charging) {
const char *base = proc_acpi_battery_path;
char info[1024];
char state[1024];
char *ptr = nullptr;
char *key = nullptr;
char *val = nullptr;
bool charge = false;
bool choose = false;
int maximum = -1;
int remaining = -1;
int secs = -1;
int pct = -1;
if (!read_power_file(base, node, "state", state, sizeof(state))) {
return;
} else {
if (!read_power_file(base, node, "info", info, sizeof(info))) {
return;
}
}
ptr = &state[0];
while (make_proc_acpi_key_val(&ptr, &key, &val)) {
if (String(key) == "present") {
if (String(val) == "yes") {
*have_battery = true;
}
} else if (String(key) == "charging state") {
/* !!! FIXME: what exactly _does_ charging/discharging mean? */
if (String(val) == "charging/discharging") {
charge = true;
} else if (String(val) == "charging") {
charge = true;
}
} else if (String(key) == "remaining capacity") {
String sval = val;
const int cvt = sval.to_int();
remaining = cvt;
}
}
ptr = &info[0];
while (make_proc_acpi_key_val(&ptr, &key, &val)) {
if (String(key) == "design capacity") {
String sval = val;
const int cvt = sval.to_int();
maximum = cvt;
}
}
if ((maximum >= 0) && (remaining >= 0)) {
pct = (int)((((float)remaining) / ((float)maximum)) * 100.0f);
if (pct < 0) {
pct = 0;
} else if (pct > 100) {
pct = 100;
}
}
/* !!! FIXME: calculate (secs). */
/*
* We pick the battery that claims to have the most minutes left.
* (failing a report of minutes, we'll take the highest percent.)
*/
// -- GODOT start --
//if ((secs < 0) && (this->nsecs_left < 0)) {
if (this->nsecs_left < 0) {
// -- GODOT end --
if ((pct < 0) && (this->percent_left < 0)) {
choose = true; /* at least we know there's a battery. */
}
if (pct > this->percent_left) {
choose = true;
}
} else if (secs > this->nsecs_left) {
choose = true;
}
if (choose) {
this->nsecs_left = secs;
this->percent_left = pct;
*charging = charge;
}
}
void PowerX11::check_proc_acpi_ac_adapter(const char *node, bool *have_ac) {
const char *base = proc_acpi_ac_adapter_path;
char state[256];
char *ptr = nullptr;
char *key = nullptr;
char *val = nullptr;
if (!read_power_file(base, node, "state", state, sizeof(state))) {
return;
}
ptr = &state[0];
while (make_proc_acpi_key_val(&ptr, &key, &val)) {
String skey = key;
if (skey == "state") {
String sval = val;
if (sval == "on-line") {
*have_ac = true;
}
}
}
}
bool PowerX11::GetPowerInfo_Linux_proc_acpi() {
String node;
DirAccess *dirp = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
bool have_battery = false;
bool have_ac = false;
bool charging = false;
this->nsecs_left = -1;
this->percent_left = -1;
this->power_state = OS::POWERSTATE_UNKNOWN;
dirp->change_dir(proc_acpi_battery_path);
Error err = dirp->list_dir_begin();
if (err != OK) {
return false; /* can't use this interface. */
} else {
node = dirp->get_next();
while (node != "") {
check_proc_acpi_battery(node.utf8().get_data(), &have_battery, &charging /*, seconds, percent*/);
node = dirp->get_next();
}
}
dirp->change_dir(proc_acpi_ac_adapter_path);
err = dirp->list_dir_begin();
if (err != OK) {
return false; /* can't use this interface. */
} else {
node = dirp->get_next();
while (node != "") {
check_proc_acpi_ac_adapter(node.utf8().get_data(), &have_ac);
node = dirp->get_next();
}
}
if (!have_battery) {
this->power_state = OS::POWERSTATE_NO_BATTERY;
} else if (charging) {
this->power_state = OS::POWERSTATE_CHARGING;
} else if (have_ac) {
this->power_state = OS::POWERSTATE_CHARGED;
} else {
this->power_state = OS::POWERSTATE_ON_BATTERY;
}
memdelete(dirp);
return true; /* definitive answer. */
}
bool PowerX11::next_string(char **_ptr, char **_str) {
char *ptr = *_ptr;
char *str = *_str;
while (*ptr == ' ') { /* skip any spaces... */
ptr++;
}
if (*ptr == '\0') {
return false;
}
str = ptr;
while ((*ptr != ' ') && (*ptr != '\n') && (*ptr != '\0')) {
ptr++;
}
if (*ptr != '\0') {
*(ptr++) = '\0';
}
*_str = str;
*_ptr = ptr;
return true;
}
bool PowerX11::int_string(char *str, int *val) {
String sval = str;
*val = sval.to_int();
return (*str != '\0');
}
/* http://lxr.linux.no/linux+v2.6.29/drivers/char/apm-emulation.c */
bool PowerX11::GetPowerInfo_Linux_proc_apm() {
bool need_details = false;
int ac_status = 0;
int battery_status = 0;
int battery_flag = 0;
int battery_percent = 0;
int battery_time = 0;
FileAccessRef fd = FileAccess::open(proc_apm_path, FileAccess::READ);
char buf[128];
char *ptr = &buf[0];
char *str = nullptr;
if (!fd) {
return false; /* can't use this interface. */
}
uint64_t br = fd->get_buffer(reinterpret_cast<uint8_t *>(buf), sizeof(buf) - 1);
fd->close();
buf[br] = '\0'; /* null-terminate the string. */
if (!next_string(&ptr, &str)) { /* driver version */
return false;
}
if (!next_string(&ptr, &str)) { /* BIOS version */
return false;
}
if (!next_string(&ptr, &str)) { /* APM flags */
return false;
}
if (!next_string(&ptr, &str)) { /* AC line status */
return false;
} else if (!int_string(str, &ac_status)) {
return false;
}
if (!next_string(&ptr, &str)) { /* battery status */
return false;
} else if (!int_string(str, &battery_status)) {
return false;
}
if (!next_string(&ptr, &str)) { /* battery flag */
return false;
} else if (!int_string(str, &battery_flag)) {
return false;
}
if (!next_string(&ptr, &str)) { /* remaining battery life percent */
return false;
}
String sstr = str;
if (sstr[sstr.length() - 1] == '%') {
sstr[sstr.length() - 1] = '\0';
}
if (!int_string(str, &battery_percent)) {
return false;
}
if (!next_string(&ptr, &str)) { /* remaining battery life time */
return false;
} else if (!int_string(str, &battery_time)) {
return false;
}
if (!next_string(&ptr, &str)) { /* remaining battery life time units */
return false;
} else if (String(str) == "min") {
battery_time *= 60;
}
if (battery_flag == 0xFF) { /* unknown state */
this->power_state = OS::POWERSTATE_UNKNOWN;
} else if (battery_flag & (1 << 7)) { /* no battery */
this->power_state = OS::POWERSTATE_NO_BATTERY;
} else if (battery_flag & (1 << 3)) { /* charging */
this->power_state = OS::POWERSTATE_CHARGING;
need_details = true;
} else if (ac_status == 1) {
this->power_state = OS::POWERSTATE_CHARGED; /* on AC, not charging. */
need_details = true;
} else {
this->power_state = OS::POWERSTATE_ON_BATTERY;
need_details = true;
}
this->percent_left = -1;
this->nsecs_left = -1;
if (need_details) {
const int pct = battery_percent;
const int secs = battery_time;
if (pct >= 0) { /* -1 == unknown */
this->percent_left = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
}
if (secs >= 0) { /* -1 == unknown */
this->nsecs_left = secs;
}
}
return true;
}
/* !!! FIXME: implement d-bus queries to org.freedesktop.UPower. */
bool PowerX11::GetPowerInfo_Linux_sys_class_power_supply(/*PowerState *state, int *seconds, int *percent*/) {
const char *base = sys_class_power_supply_path;
String name;
DirAccess *dirp = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
dirp->change_dir(base);
Error err = dirp->list_dir_begin();
if (err != OK) {
return false;
}
this->power_state = OS::POWERSTATE_NO_BATTERY; /* assume we're just plugged in. */
this->nsecs_left = -1;
this->percent_left = -1;
name = dirp->get_next();
while (name != "") {
bool choose = false;
char str[64];
OS::PowerState st;
int secs;
int pct;
if ((name == ".") || (name == "..")) {
name = dirp->get_next();
continue; //skip these, of course.
} else {
if (!read_power_file(base, name.utf8().get_data(), "type", str, sizeof(str))) {
name = dirp->get_next();
continue; // Don't know _what_ we're looking at. Give up on it.
} else {
if (String(str) != "Battery\n") {
name = dirp->get_next();
continue; // we don't care about UPS and such.
}
}
}
/* some drivers don't offer this, so if it's not explicitly reported assume it's present. */
if (read_power_file(base, name.utf8().get_data(), "present", str, sizeof(str)) && (String(str) == "0\n")) {
st = OS::POWERSTATE_NO_BATTERY;
} else if (!read_power_file(base, name.utf8().get_data(), "status", str, sizeof(str))) {
st = OS::POWERSTATE_UNKNOWN; /* uh oh */
} else if (String(str) == "Charging\n") {
st = OS::POWERSTATE_CHARGING;
} else if (String(str) == "Discharging\n") {
st = OS::POWERSTATE_ON_BATTERY;
} else if ((String(str) == "Full\n") || (String(str) == "Not charging\n")) {
st = OS::POWERSTATE_CHARGED;
} else {
st = OS::POWERSTATE_UNKNOWN; /* uh oh */
}
if (!read_power_file(base, name.utf8().get_data(), "capacity", str, sizeof(str))) {
pct = -1;
} else {
pct = String(str).to_int();
pct = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
}
if (!read_power_file(base, name.utf8().get_data(), "time_to_empty_now", str, sizeof(str))) {
secs = -1;
} else {
secs = String(str).to_int();
secs = (secs <= 0) ? -1 : secs; /* 0 == unknown */
}
/*
* We pick the battery that claims to have the most minutes left.
* (failing a report of minutes, we'll take the highest percent.)
*/
if ((secs < 0) && (this->nsecs_left < 0)) {
if ((pct < 0) && (this->percent_left < 0)) {
choose = true; /* at least we know there's a battery. */
} else if (pct > this->percent_left) {
choose = true;
}
} else if (secs > this->nsecs_left) {
choose = true;
}
if (choose) {
this->nsecs_left = secs;
this->percent_left = pct;
this->power_state = st;
}
name = dirp->get_next();
}
memdelete(dirp);
return true; /* don't look any further*/
}
bool PowerX11::UpdatePowerInfo() {
if (GetPowerInfo_Linux_sys_class_power_supply()) { // try method 1
return true;
}
if (GetPowerInfo_Linux_proc_acpi()) { // try further
return true;
}
if (GetPowerInfo_Linux_proc_apm()) { // try even further
return true;
}
return false;
}
PowerX11::PowerX11() :
nsecs_left(-1),
percent_left(-1),
power_state(OS::POWERSTATE_UNKNOWN) {
}
PowerX11::~PowerX11() {
}
OS::PowerState PowerX11::get_power_state() {
if (UpdatePowerInfo()) {
return power_state;
} else {
return OS::POWERSTATE_UNKNOWN;
}
}
int PowerX11::get_power_seconds_left() {
if (UpdatePowerInfo()) {
return nsecs_left;
} else {
return -1;
}
}
int PowerX11::get_power_percent_left() {
if (UpdatePowerInfo()) {
return percent_left;
} else {
return -1;
}
}
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