576 lines
14 KiB
C++
576 lines
14 KiB
C++
/*************************************************************************/
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/* power_x11.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "power_x11.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <fcntl.h>
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// CODE CHUNK IMPORTED FROM SDL 2.0
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static const char* proc_apm_path = "/proc/apm";
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static const char* proc_acpi_battery_path = "/proc/acpi/battery";
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static const char* proc_acpi_ac_adapter_path = "/proc/acpi/ac_adapter";
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static const char* sys_class_power_supply_path = "/sys/class/power_supply";
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FileAccessRef PowerX11::open_power_file(const char* base, const char* node, const char* key)
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{
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String path = String(base) + String("/") + String(node) + String("/") + String(key);
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FileAccessRef f = FileAccess::open(path,FileAccess::READ);
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return f;
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}
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bool PowerX11::read_power_file(const char* base, const char* node, const char* key, char* buf, size_t buflen)
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{
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ssize_t br = 0;
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FileAccessRef fd = open_power_file(base, node, key);
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if (!fd) {
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return false;
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}
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br = fd->get_buffer(reinterpret_cast<uint8_t*>(buf), buflen-1);
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fd->close();
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if (br < 0) {
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return false;
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}
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buf[br] = '\0'; // null-terminate the string
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return true;
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}
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bool PowerX11::make_proc_acpi_key_val(char **_ptr, char **_key, char **_val)
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{
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char *ptr = *_ptr;
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while (*ptr == ' ') {
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ptr++; /* skip whitespace. */
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}
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if (*ptr == '\0') {
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return false; /* EOF. */
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}
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*_key = ptr;
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while ((*ptr != ':') && (*ptr != '\0')) {
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ptr++;
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}
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if (*ptr == '\0') {
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return false; /* (unexpected) EOF. */
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}
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*(ptr++) = '\0'; /* terminate the key. */
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while ((*ptr == ' ') && (*ptr != '\0')) {
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ptr++; /* skip whitespace. */
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}
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if (*ptr == '\0') {
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return false; /* (unexpected) EOF. */
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}
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*_val = ptr;
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while ((*ptr != '\n') && (*ptr != '\0')) {
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ptr++;
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}
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if (*ptr != '\0') {
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*(ptr++) = '\0'; /* terminate the value. */
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}
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*_ptr = ptr; /* store for next time. */
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return true;
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}
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void
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PowerX11::check_proc_acpi_battery(const char * node, bool * have_battery, bool * charging)
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{
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const char *base = proc_acpi_battery_path;
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char info[1024];
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char state[1024];
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char *ptr = NULL;
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char *key = NULL;
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char *val = NULL;
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bool charge = false;
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bool choose = false;
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int maximum = -1;
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int remaining = -1;
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int secs = -1;
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int pct = -1;
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if (!read_power_file(base, node, "state", state, sizeof (state))) {
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return;
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} else {
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if (!read_power_file(base, node, "info", info, sizeof (info)))
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return;
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}
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ptr = &state[0];
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while (make_proc_acpi_key_val(&ptr, &key, &val)) {
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if (String(key) == "present") {
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if (String(val) == "yes") {
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*have_battery = true;
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}
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} else if (String(key) == "charging state") {
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/* !!! FIXME: what exactly _does_ charging/discharging mean? */
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if (String(val) == "charging/discharging") {
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charge = true;
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} else if (String(val) == "charging") {
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charge = true;
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}
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} else if (String(key) == "remaining capacity") {
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char *endptr = NULL;
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//const int cvt = (int) strtol(val, &endptr, 10);
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String sval = val;
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const int cvt = sval.to_int();
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if (*endptr == ' ') {
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remaining = cvt;
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}
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}
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}
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ptr = &info[0];
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while (make_proc_acpi_key_val(&ptr, &key, &val)) {
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if (String(key) == "design capacity") {
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char *endptr = NULL;
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String sval = val;
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const int cvt = sval.to_int();
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if (*endptr == ' ') {
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maximum = cvt;
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}
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}
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}
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if ((maximum >= 0) && (remaining >= 0)) {
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pct = (int) ((((float) remaining) / ((float) maximum)) * 100.0f);
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if (pct < 0) {
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pct = 0;
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} else if (pct > 100) {
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pct = 100;
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}
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}
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/* !!! FIXME: calculate (secs). */
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/*
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* We pick the battery that claims to have the most minutes left.
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* (failing a report of minutes, we'll take the highest percent.)
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*/
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if ((secs < 0) && (this->nsecs_left < 0)) {
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if ((pct < 0) && (this->percent_left < 0)) {
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choose = true; /* at least we know there's a battery. */
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}
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if (pct > this->percent_left) {
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choose = true;
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}
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} else if (secs > this->nsecs_left) {
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choose = true;
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}
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if (choose) {
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this->nsecs_left = secs;
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this->percent_left = pct;
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*charging = charge;
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}
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}
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void PowerX11::check_proc_acpi_ac_adapter(const char * node, bool * have_ac)
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{
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const char *base = proc_acpi_ac_adapter_path;
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char state[256];
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char *ptr = NULL;
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char *key = NULL;
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char *val = NULL;
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if (!read_power_file(base, node, "state", state, sizeof (state))) {
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return;
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}
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ptr = &state[0];
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while (make_proc_acpi_key_val(&ptr, &key, &val)) {
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String skey = key;
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if (skey == "state") {
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String sval = val;
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if (sval == "on-line") {
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*have_ac = true;
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}
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}
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}
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}
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bool PowerX11::GetPowerInfo_Linux_proc_acpi()
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{
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String node;
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DirAccess *dirp = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
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bool have_battery = false;
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bool have_ac = false;
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bool charging = false;
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this->nsecs_left = -1;
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this->percent_left = -1;
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this->power_state = POWERSTATE_UNKNOWN;
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dirp->change_dir(proc_acpi_battery_path);
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dirp->list_dir_begin();
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if (dirp == NULL) {
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return false; /* can't use this interface. */
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} else {
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node = dirp->get_next();
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while (node != "") {
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check_proc_acpi_battery(node.utf8().get_data(), &have_battery, &charging/*, seconds, percent*/);
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node = dirp->get_next();
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}
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memdelete(dirp);
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}
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dirp->change_dir(proc_acpi_ac_adapter_path);
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dirp->list_dir_begin();
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if (dirp == NULL) {
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return false; /* can't use this interface. */
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} else {
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node = dirp->get_next();
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while (node != "") {
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check_proc_acpi_ac_adapter(node.utf8().get_data(), &have_ac);
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node = dirp->get_next();
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}
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memdelete(dirp);
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}
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if (!have_battery) {
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this->power_state = POWERSTATE_NO_BATTERY;
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} else if (charging) {
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this->power_state = POWERSTATE_CHARGING;
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} else if (have_ac) {
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this->power_state = POWERSTATE_CHARGED;
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} else {
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this->power_state = POWERSTATE_ON_BATTERY;
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}
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return true; /* definitive answer. */
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}
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bool PowerX11::next_string(char **_ptr, char **_str)
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{
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char *ptr = *_ptr;
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char *str = *_str;
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while (*ptr == ' ') { /* skip any spaces... */
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ptr++;
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}
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if (*ptr == '\0') {
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return false;
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}
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str = ptr;
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while ((*ptr != ' ') && (*ptr != '\n') && (*ptr != '\0'))
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ptr++;
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if (*ptr != '\0')
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*(ptr++) = '\0';
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*_str = str;
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*_ptr = ptr;
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return true;
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}
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bool PowerX11::int_string(char *str, int *val)
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{
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String sval = str;
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*val = sval.to_int();
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return (*str != '\0');
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}
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/* http://lxr.linux.no/linux+v2.6.29/drivers/char/apm-emulation.c */
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bool PowerX11::GetPowerInfo_Linux_proc_apm()
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{
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bool need_details = false;
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int ac_status = 0;
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int battery_status = 0;
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int battery_flag = 0;
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int battery_percent = 0;
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int battery_time = 0;
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FileAccessRef fd = FileAccess::open(proc_apm_path,FileAccess::READ);
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char buf[128];
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char *ptr = &buf[0];
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char *str = NULL;
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ssize_t br;
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if (!fd) {
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return false; /* can't use this interface. */
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}
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br = fd->get_buffer(reinterpret_cast<uint8_t*>(buf), sizeof (buf) - 1);
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fd->close();
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if (br < 0) {
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return false;
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}
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buf[br] = '\0'; /* null-terminate the string. */
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if (!next_string(&ptr, &str)) { /* driver version */
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return false;
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}
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if (!next_string(&ptr, &str)) { /* BIOS version */
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return false;
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}
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if (!next_string(&ptr, &str)) { /* APM flags */
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return false;
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}
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if (!next_string(&ptr, &str)) { /* AC line status */
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return false;
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} else if (!int_string(str, &ac_status)) {
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return false;
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}
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if (!next_string(&ptr, &str)) { /* battery status */
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return false;
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} else if (!int_string(str, &battery_status)) {
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return false;
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}
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if (!next_string(&ptr, &str)) { /* battery flag */
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return false;
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} else if (!int_string(str, &battery_flag)) {
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return false;
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}
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if (!next_string(&ptr, &str)) { /* remaining battery life percent */
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return false;
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}
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String sstr = str;
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if (sstr[sstr.length() - 1] == '%') {
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sstr[sstr.length() - 1] = '\0';
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}
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if (!int_string(str, &battery_percent)) {
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return false;
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}
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if (!next_string(&ptr, &str)) { /* remaining battery life time */
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return false;
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} else if (!int_string(str, &battery_time)) {
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return false;
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}
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if (!next_string(&ptr, &str)) { /* remaining battery life time units */
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return false;
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} else if (String(str) == "min") {
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battery_time *= 60;
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}
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if (battery_flag == 0xFF) { /* unknown state */
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this->power_state = POWERSTATE_UNKNOWN;
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} else if (battery_flag & (1 << 7)) { /* no battery */
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this->power_state = POWERSTATE_NO_BATTERY;
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} else if (battery_flag & (1 << 3)) { /* charging */
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this->power_state = POWERSTATE_CHARGING;
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need_details = true;
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} else if (ac_status == 1) {
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this->power_state = POWERSTATE_CHARGED; /* on AC, not charging. */
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need_details = true;
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} else {
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this->power_state = POWERSTATE_ON_BATTERY;
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need_details = true;
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}
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this->percent_left = -1;
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this->nsecs_left = -1;
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if (need_details) {
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const int pct = battery_percent;
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const int secs = battery_time;
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if (pct >= 0) { /* -1 == unknown */
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this->percent_left = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
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}
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if (secs >= 0) { /* -1 == unknown */
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this->nsecs_left = secs;
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}
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}
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return true;
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}
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/* !!! FIXME: implement d-bus queries to org.freedesktop.UPower. */
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bool PowerX11::GetPowerInfo_Linux_sys_class_power_supply(/*PowerState *state, int *seconds, int *percent*/)
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{
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const char* base = sys_class_power_supply_path;
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String name;
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DirAccess *dirp = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
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dirp->change_dir(base);
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dirp->list_dir_begin();
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if (!dirp) {
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return false;
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}
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this->power_state = POWERSTATE_NO_BATTERY; /* assume we're just plugged in. */
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this->nsecs_left = -1;
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this->percent_left = -1;
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name = dirp->get_next();
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while (name != "") {
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bool choose = false;
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char str[64];
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PowerState st;
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int secs;
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int pct;
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if ((name == ".") || (name == "..")) {
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name = dirp->get_next();
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continue; //skip these, of course.
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} else {
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if (!read_power_file(base, name.utf8().get_data(), "type", str, sizeof (str))) {
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name = dirp->get_next();
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continue; // Don't know _what_ we're looking at. Give up on it.
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} else {
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if (String(str) != "Battery\n") {
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name = dirp->get_next();
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continue; // we don't care about UPS and such.
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}
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}
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}
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/* some drivers don't offer this, so if it's not explicitly reported assume it's present. */
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if (read_power_file(base, name.utf8().get_data(), "present", str, sizeof (str)) && (String(str) == "0\n")) {
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st = POWERSTATE_NO_BATTERY;
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} else if (!read_power_file(base, name.utf8().get_data(), "status", str, sizeof (str))) {
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st = POWERSTATE_UNKNOWN; /* uh oh */
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} else if (String(str) == "Charging\n") {
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st = POWERSTATE_CHARGING;
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} else if (String(str) == "Discharging\n") {
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st = POWERSTATE_ON_BATTERY;
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} else if ((String(str) == "Full\n") || (String(str) == "Not charging\n")) {
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st = POWERSTATE_CHARGED;
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} else {
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st = POWERSTATE_UNKNOWN; /* uh oh */
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}
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if (!read_power_file(base, name.utf8().get_data(), "capacity", str, sizeof (str))) {
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pct = -1;
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} else {
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pct = String(str).to_int();
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pct = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
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}
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if (!read_power_file(base, name.utf8().get_data(), "time_to_empty_now", str, sizeof (str))) {
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secs = -1;
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} else {
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secs = String(str).to_int();
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secs = (secs <= 0) ? -1 : secs; /* 0 == unknown */
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}
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/*
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* We pick the battery that claims to have the most minutes left.
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* (failing a report of minutes, we'll take the highest percent.)
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*/
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if ((secs < 0) && (this->nsecs_left < 0)) {
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if ((pct < 0) && (this->percent_left < 0)) {
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choose = true; /* at least we know there's a battery. */
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} else if (pct > this->percent_left) {
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choose = true;
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}
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} else if (secs > this->nsecs_left) {
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choose = true;
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}
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if (choose) {
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this->nsecs_left = secs;
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this->percent_left = pct;
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this->power_state = st;
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}
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name = dirp->get_next();
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}
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memdelete(dirp);
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return true; /* don't look any further*/
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}
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|
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(POWERSTATE_UNKNOWN) {
|
|
}
|
|
|
|
PowerX11::~PowerX11() {
|
|
}
|
|
|
|
PowerState PowerX11::get_power_state() {
|
|
if (UpdatePowerInfo()) {
|
|
return power_state;
|
|
}
|
|
else {
|
|
return 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;
|
|
}
|
|
}
|