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Move platform-dependent parts of Linux battery meter.

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This commit is contained in:
Hisham Muhammad
2014-11-27 21:02:52 -02:00
parent b4f6b11092
commit 430c7c9a9b
11 changed files with 471 additions and 270 deletions
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276
BatteryMeter.c
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@ -9,14 +9,13 @@ This meter written by Ian P. Hands (iphands@gmail.com, ihands@redhat.com).
#include "BatteryMeter.h"
#include "Platform.h"
#include "ProcessList.h"
#include "CRT.h"
#include "String.h"
#include <string.h>
#include <stdlib.h>
#include <dirent.h>
#include <unistd.h>
/*{
#include "Meter.h"
@ -26,273 +25,22 @@ typedef enum ACPresence_ {
AC_PRESENT,
AC_ERROR
} ACPresence;
}*/
int BatteryMeter_attributes[] = {
BATTERY
};
static unsigned long int parseUevent(FILE * file, const char *key) {
char line[100];
unsigned long int dValue = 0;
char* saveptr;
while (fgets(line, sizeof line, file)) {
if (strncmp(line, key, strlen(key)) == 0) {
char *value;
strtok_r(line, "=", &saveptr);
value = strtok_r(NULL, "=", &saveptr);
dValue = atoi(value);
break;
}
}
return dValue;
}
static unsigned long int parseBatInfo(const char *fileName, const unsigned short int lineNum, const unsigned short int wordNum) {
const char batteryPath[] = PROCDIR "/acpi/battery/";
DIR* batteryDir = opendir(batteryPath);
if (!batteryDir)
return 0;
#define MAX_BATTERIES 64
char* batteries[MAX_BATTERIES];
unsigned int nBatteries = 0;
memset(batteries, 0, MAX_BATTERIES * sizeof(char*));
struct dirent result;
struct dirent* dirEntry;
while (nBatteries < MAX_BATTERIES) {
int err = readdir_r(batteryDir, &result, &dirEntry);
if (err || !dirEntry)
break;
char* entryName = dirEntry->d_name;
if (strncmp(entryName, "BAT", 3))
continue;
batteries[nBatteries] = strdup(entryName);
nBatteries++;
}
closedir(batteryDir);
unsigned long int total = 0;
for (unsigned int i = 0; i < nBatteries; i++) {
char infoPath[30];
snprintf(infoPath, sizeof infoPath, "%s%s/%s", batteryPath, batteries[i], fileName);
FILE* file = fopen(infoPath, "r");
if (!file) {
break;
}
char line[50] = "";
for (unsigned short int i = 0; i < lineNum; i++) {
char* ok = fgets(line, sizeof line, file);
if (!ok) break;
}
fclose(file);
char *foundNumStr = String_getToken(line, wordNum);
const unsigned long int foundNum = atoi(foundNumStr);
free(foundNumStr);
total += foundNum;
}
for (unsigned int i = 0; i < nBatteries; i++) {
free(batteries[i]);
}
return total;
}
static ACPresence procAcpiCheck() {
ACPresence isOn = AC_ERROR;
const char *power_supplyPath = PROCDIR "/acpi/ac_adapter";
DIR *power_supplyDir = opendir(power_supplyPath);
if (!power_supplyDir) {
return AC_ERROR;
}
struct dirent result;
struct dirent* dirEntry;
for (;;) {
int err = readdir_r((DIR *) power_supplyDir, &result, &dirEntry);
if (err || !dirEntry)
break;
char* entryName = (char *) dirEntry->d_name;
if (entryName[0] != 'A')
continue;
char statePath[50];
snprintf((char *) statePath, sizeof statePath, "%s/%s/state", power_supplyPath, entryName);
FILE* file = fopen(statePath, "r");
if (!file) {
isOn = AC_ERROR;
continue;
}
char line[100];
fgets(line, sizeof line, file);
line[sizeof(line) - 1] = '\0';
fclose(file);
const char *isOnline = String_getToken(line, 2);
if (strcmp(isOnline, "on-line") == 0) {
isOn = AC_PRESENT;
} else {
isOn = AC_ABSENT;
}
free((char *) isOnline);
if (isOn == AC_PRESENT) {
break;
}
}
if (power_supplyDir)
closedir(power_supplyDir);
return isOn;
}
static ACPresence sysCheck() {
ACPresence isOn = AC_ERROR;
const char *power_supplyPath = "/sys/class/power_supply";
DIR *power_supplyDir = opendir(power_supplyPath);
if (!power_supplyDir) {
return AC_ERROR;
}
struct dirent result;
struct dirent* dirEntry;
for (;;) {
int err = readdir_r((DIR *) power_supplyDir, &result, &dirEntry);
if (err || !dirEntry)
break;
char* entryName = (char *) dirEntry->d_name;
if (strncmp(entryName, "A", 1)) {
continue;
}
char onlinePath[50];
snprintf((char *) onlinePath, sizeof onlinePath, "%s/%s/online", power_supplyPath, entryName);
FILE* file = fopen(onlinePath, "r");
if (!file) {
isOn = AC_ERROR;
} else {
isOn = (fgetc(file) - '0');
fclose(file);
if (isOn == AC_PRESENT) {
// If any AC adapter is being used then stop
break;
}
}
}
if (power_supplyDir)
closedir(power_supplyDir);
return isOn;
}
static ACPresence chkIsOnline() {
if (access(PROCDIR "/acpi/ac_adapter", F_OK) == 0) {
return procAcpiCheck();
} else if (access("/sys/class/power_supply", F_OK) == 0) {
return sysCheck();
} else {
return AC_ERROR;
}
}
static double getProcBatData() {
const unsigned long int totalFull = parseBatInfo("info", 3, 4);
if (totalFull == 0)
return 0;
const unsigned long int totalRemain = parseBatInfo("state", 5, 3);
if (totalRemain == 0)
return 0;
return totalRemain * 100.0 / (double) totalFull;
}
static double getSysBatData() {
const char *power_supplyPath = "/sys/class/power_supply/";
DIR *power_supplyDir = opendir(power_supplyPath);
if (!power_supplyDir)
return 0;
unsigned long int totalFull = 0;
unsigned long int totalRemain = 0;
struct dirent result;
struct dirent* dirEntry;
for (;;) {
int err = readdir_r((DIR *) power_supplyDir, &result, &dirEntry);
if (err || !dirEntry)
break;
char* entryName = (char *) dirEntry->d_name;
if (strncmp(entryName, "BAT", 3)) {
continue;
}
const char ueventPath[50];
snprintf((char *) ueventPath, sizeof ueventPath, "%s%s/uevent", power_supplyPath, entryName);
FILE *file;
if ((file = fopen(ueventPath, "r")) == NULL) {
closedir(power_supplyDir);
return 0;
}
if ((totalFull += parseUevent(file, "POWER_SUPPLY_ENERGY_FULL="))) {
totalRemain += parseUevent(file, "POWER_SUPPLY_ENERGY_NOW=");
} else {
//reset file pointer
if (fseek(file, 0, SEEK_SET) < 0) {
closedir(power_supplyDir);
fclose(file);
return 0;
}
}
//Some systems have it as CHARGE instead of ENERGY.
if ((totalFull += parseUevent(file, "POWER_SUPPLY_CHARGE_FULL="))) {
totalRemain += parseUevent(file, "POWER_SUPPLY_CHARGE_NOW=");
} else {
//reset file pointer
if (fseek(file, 0, SEEK_SET) < 0) {
closedir(power_supplyDir);
fclose(file);
return 0;
}
}
fclose(file);
}
const double percent = totalFull > 0 ? ((double) totalRemain * 100) / (double) totalFull : 0;
closedir(power_supplyDir);
return percent;
}
static void BatteryMeter_setValues(Meter * this, char *buffer, int len) {
double percent = getProcBatData();
ACPresence isOnAC;
double percent;
Platform_getBatteryLevel(&percent, &isOnAC);
if (percent == 0) {
percent = getSysBatData();
if (percent == 0) {
snprintf(buffer, len, "n/a");
return;
}
if (percent == -1) {
this->values[0] = 0;
snprintf(buffer, len, "n/a");
return;
}
this->values[0] = percent;
@ -308,11 +56,9 @@ static void BatteryMeter_setValues(Meter * this, char *buffer, int len) {
onBatteryText = "%.1f%%(bat)";
}
ACPresence isOnLine = chkIsOnline();
if (isOnLine == AC_PRESENT) {
if (isOnAC == AC_PRESENT) {
snprintf(buffer, len, onAcText, percent);
} else if (isOnLine == AC_ABSENT) {
} else if (isOnAC == AC_ABSENT) {
snprintf(buffer, len, onBatteryText, percent);
} else {
snprintf(buffer, len, unknownText, percent);