实现文件复制：完成一个目录复制命令，包括目录下的文件和子目录。学习和掌握操作系统中与文件操作相关的概念，并使用系统提供的API编程实现。-Implementation file: a directory to complete the copy command, including the directory files and subdirectories. Learn and master the operating system and file operation related con

Reflection Ops Copy for linux API Driver.

Converted to DMA API, added zero-copy buffer handling, and (from the mac68k project) introduced dhd s support for 16-bit cards.

Copy Engine support: low-level Target-side Copy Engine API. This is a hardware access layer used by code that understands how to use copy engines.

在Linux下，通过系统提供的API，对一指定的文件或文件夹进行拷贝操作。程序带有详细的注释，对Linux编程初学者有较大帮助。-Under Linux, API provided by the system for a specified file or folder copy operation. Programs with detailed notes on the Linux programming beginners great help.