2013-2014华南理工大学操作系统课程设计（完整源代码和详细文档）

Requirements 1． Simulate a Unix file system on your Windows Platform 2． Understand the file system on Unix system, and the usage of i-nodes 3． Implement the function of sub-directory 4． The task needs to be completed using C++ or C 5． Tasks/Functionalities The following functions are required in your file system: 1． Allocate 16MB space in memory as the storage for your file system. The space is divided as blocks with block size 1KB Assume block address length is 32-bit; Design the information contained in i-node The i-node should support up to 10 direct block addresses The i-node should support at least one indirect block address 2． The fist block is used for storing the i-node for the root directory(/). While your program is lunched, two directories (/dir1 and / dir1/dir2) should be created, and also two files need to be written as /dir1/file1 and /dir1/dir2/file2 (5 marks) 3． File 1 and 2 contain the message of “This is file 1.” and “This is file2”. 4． Following commands should be supported in your system： a) Create a file：createFile fileName fileSize (10 marks) i.e.：createFile /dir1/myFile 1024 (in bytes) if fileSiz > max file size, print out an error message. The file content is filled up with filename + repeated digits from 0 - 9 i.e.: “myFile012345678901234567890123….” b) Delete a file：deleteFile filename (10 marks) i.e.：deleteFile /dir1/myFile c) Create a directory：createDir (5 marks) i.e.：createDir /dir1/sub1 d) Delete a directory：deleteDir (5 marks) i.e.: deleteDir /dir1/sub1 （The current working directory is not allowed to be deleted） e) Change current working direcotry：changeDir (5 marks) i.e.: changeDir /dir2 f) List all the files and sub-directories under current working directory：dir (5 marks) You also need to list at least two file attributes. (i.e. file size, time created, etc.) g) Copy a file : cp (5 marks) i.e.: file1 file2 h) Display the usage of storage space：sum (10 marks) Display the usage of the 16MB space. You need to list how many blocks are used and how many blocks are unused. i) Print out the file contents: cat (10 marks) Print out the contents of the file on the terminal i.e: cat /dir1/file1 5． quit，exit the program and release all the memory occupied；(5 marks) You do not need to save the contents in memory onto hard disk