286 static int readFromFile(const String8& path, std::string* buf) {  in readFromFile()  function
318     if (readFromFile(path, &buf) <= 0) {  in readPowerSupplyType()
335     if (readFromFile(path, &buf) > 0)  in getBooleanField()
346     if (readFromFile(path, &buf) > 0)  in getIntField()
358     return (readFromFile(path, &scope) > 0 && scope == kScopeDevice);  in isScopedPowerSupply()
420     if (readFromFile(mHealthdConfig->batteryCapacityLevelPath, &buf) > 0)  in updateValues()
423     if (readFromFile(mHealthdConfig->batteryStatusPath, &buf) > 0)  in updateValues()
428         if (readFromFile(mHealthdConfig->batteryHealthPath, &buf) > 0)  in updateValues()
434     if (readFromFile(mHealthdConfig->batteryTechnologyPath, &buf) > 0)  in updateValues()
437     if (readFromFile(mHealthdConfig->chargingPolicyPath, &buf) > 0)  in updateValues()
440     if (readFromFile(mHealthdConfig->chargingStatePath, &buf) > 0)  in updateValues()
559         if (readFromFile(mHealthdConfig->batteryStatusPath, &buf) > 0)  in getChargeStatus()
584         if (readFromFile(mHealthdConfig->chargingPolicyPath, &buf) > 0)  in getChargingPolicy()