double	GetRaspberryPiTemperature(){
	String result = LoadFile("/sys/devices/virtual/thermal/thermal_zone0/temp");
	if(!result.IsEmpty()) return 0.001*ScanDouble(~result);
	return -55.0;
}

double	GetRaspberryPiTemperature(){
	FILE *in=fopen("/sys/devices/virtual/thermal/thermal_zone0/temp","rb");
	char s[8];
	if(fgets(s,8,in)) return 0.001*ScanDouble(s);
	return -55.0;
}

	FileIn in;
	in.Open("/sys/devices/virtual/thermal/thermal_zone0/temp");
	if(in.IsError()) return -100;
	
//	String result = in.GetLine();
//	String result = in.Get(5);
	String result = in.GetAll(8);
	if(!result.IsEmpty()) return 0.001*ScanInt(~result);
	return -55.0;

#include <Core/Core.h>

using namespace Upp;

CONSOLE_APP_MAIN
{
	String meminfo = LoadFile("/proc/meminfo");
	Cout() << meminfo << "\n";
}

#include <Core/Core.h>

using namespace Upp;

String LoadFileRaw(const char *filename){
	int fd = open(filename,O_RDONLY);
	if(fd!=-1){
		char buf[4096];
		StringBuffer s;
		int len;
		while((len=read(fd,buf,4096))==4096) s.Cat(buf,len);
		if(len>0) s.Cat(buf,len);
		close(fd);
		if(s.GetCount()>0) return s;
	}
	return String::GetVoid();
}

CONSOLE_APP_MAIN
{
	String meminfo = LoadFileRaw("/proc/meminfo");
	Cout() << meminfo << "\n\n";
}

LoadFileRaw("/sys/devices/virtual/thermal/thermal_zone0/temp");

bool FileStream::Open(const char *name, dword mode, mode_t tmode) {
	Close();
	LLOG("Open " << name);
	int iomode = mode & ~SHAREMASK;
	handle = open(ToSystemCharset(name), iomode == READ ? O_RDONLY :
	                    iomode == CREATE ? O_CREAT|O_RDWR|O_TRUNC :
	                    O_RDWR|O_CREAT,
	              tmode);
	if(handle >= 0) {
		struct stat st[1];
		fstat(handle, st);
		if(!(st->st_mode & S_IFREG) ||  // not a regular file, e.g. folder - bad things would happen
		   (mode & NOWRITESHARE) && flock(handle, LOCK_EX|LOCK_NB) < 0) { // lock if not sharing
			close(handle);
			handle = -1;
			return false;
		}
		int64 fsz = st->st_size;

String LoadFile(const char *filename) {
	FindFile ff(filename);
	if(ff && ff.IsFile()) {
	#ifdef PLATFORM_POSIX
		if(ff.GetLength() == 0) { // handle special cases like /proc/...
			int fd = open(filename,O_RDONLY);
			if(fd >= 0) {
				const int CHUNK = 32768;
				StringBuffer s;
				for(;;) {
					int n = s.GetCount();
					s.SetCount(n + CHUNK);
					int len = read(fd, ~s + n, CHUNK);
					if(len != CHUNK) {
						if(len > 0)
							s.SetCount(n + len);
						return s;
					}
				}
			}
			return String::GetVoid();
		}
	#endif
		FileIn in(filename);
		return LoadStream(in);
	}
	return String::GetVoid();
}

	if(String::GetVoid().IsVoid()) Cout() << "String::GetVoid().IsVoid() works!\n";
	else Cout() << "String::GetVoid().IsVoid() fails!\n";
	if(IsVoid(String::GetVoid())) Cout() << "IsVoid(String::GetVoid()) works!\n";
	else Cout() << "IsVoid(String::GetVoid()) fails!\n";