LINUX本身並不提供拷貝檔案的介面，於是自己實現了一個。

int copyFile(const char* src, const char* des)
{
	int nRet = 0;
	FILE* pSrc = NULL, *pDes = NULL;
	pSrc = fopen(src, "r");
	pDes = fopen(des, "w+");


	if (pSrc && pDes)
	{
		int nLen = 0;
		char szBuf[1024] = {0};
		while((nLen = fread(szBuf, 1, sizeof szBuf, pSrc)) > 0)
		{
			fwrite(szBuf, 1, nLen, pDes);
		}
	}
	else
		nRet = -1;


	if (pSrc)
		fclose(pSrc), pSrc = NULL;


	if (pDes)
		fclose(pDes), pDes = NULL;


	return nRet;
}