操作系统课程设计

要完成的任务是模拟unix操作系统中的文件系统功能。在终端界面上用户可以象unix的shell命令一样输入一些命令，如输入ls 显示文件目录，chmod改变文件权限，chown改变文件拥有者，chgrp改变文件所属组，chnam改变文件名，pwd显示当前目录，cd改变当前目录，mkdir创建目录，rmdir删除目录，mk创建文件 ,cp文件拷贝，rm删除文件，cat显示文件内容，login切换用户，passwd修改用户口令 等功能。在后台，要实现混合索引式文件结构，包括用空闲结点号栈管理空闲结点和成组链接发管理空闲盘块。-courses on operating system design to complete the task of simulation unix operating system of file system function. In a terminal interface, users can like unix shell orders importation of certain orders importing ls show directory, change file permissions chmod, chown change who owns the file, chgrp Changes file group, chnam change the name, pwd shows the current directory, cd change the current directory, create directories mkdir, rmdir delete directory, mk founding documents, cp paper copy, delete the file rm, cat shows the contents of the documents, login switching users, passwd user password changes, and other functions. In the background, in order to achieve mixed-indexing structure of the document, including the use of idle nodes, stack management spare node and link the group mana