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;