操作系統(tǒng)課程設(shè)計(jì)基于Linux的模擬文件系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)

1、中北大學(xué)操作系統(tǒng)課程設(shè)計(jì)說 明 書學(xué) 院、系：軟件學(xué)院專 業(yè)：軟件工程學(xué) 生 姓 名：學(xué) 號：設(shè) 計(jì) 題 目：基于linux的模擬文件系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) 起 迄 日 期:2013年11月22日- 2013年12月6日指 導(dǎo) 教 師:2013 年 12月 6 日1.需求分析(1)設(shè)計(jì)目的：文件管理是操作系統(tǒng)的重要功能之一。用高級語言編寫和調(diào)試一個(gè)簡單的文件系統(tǒng)，模擬文件管理的工作過程。從而加深學(xué)生對文件系統(tǒng)內(nèi)部功能和內(nèi)部實(shí)現(xiàn)的理解和認(rèn)識。(2)基本功能：主要包括：改變目錄（cd），創(chuàng)建目錄（md），顯示目錄（dir），刪除目錄（rd），打開全部文件（openall），打開單個(gè)文件（open），建立

2、一個(gè)文件（create），刪除一個(gè)文件（delete），寫文件（write），讀文件（read），改文件的保護(hù)碼（change）,退出（exit）等。(3)設(shè)計(jì)要求：設(shè)計(jì)一個(gè)10個(gè)用戶的文件系統(tǒng)。每個(gè)用戶最多可以保存10個(gè)文件，一次運(yùn)行用戶可打開多個(gè)文件。程序采用二級文件目錄。（即設(shè)置主目錄（mfd）和用戶文件目錄（ufd）。另外，可打開文件設(shè)置指針。為了方便實(shí)現(xiàn)，對文件的讀寫作了簡化。在執(zhí)行讀寫命令時(shí)，只需改讀寫指針。并不進(jìn)行實(shí)際的讀寫操作。2.總體設(shè)計(jì) 2.1數(shù)據(jù)結(jié)構(gòu)struck file char name10; int code;/保護(hù)碼 int size; char pwrite;/

3、讀寫指針 ; struct user char name10; struct file *list;/目錄指針 ; 2.2主要函數(shù)聲明void running(); void delet(); void write(); void open(); void close(); void bye(); void read(); void create(); void input(); 2.3模塊結(jié)構(gòu)圖 3.詳細(xì)設(shè)計(jì)3.1 模塊及功能說明3.1.1 input()模塊功能：進(jìn)入文件系統(tǒng)。3.1.2 running()模塊功能：選擇相應(yīng)的操作。3.1.3 bye()模塊功能：退出文件系統(tǒng)函數(shù)bye()

4、。3.1.4 create()模塊功能：創(chuàng)建文件。3.1.5 open()模塊功能：打開文件。3.1.6 close()模塊功能：關(guān)閉文件。3.1.7 write()模塊功能：寫文件(需要先打開文件)。3.1.8 read()模塊功能：讀文件(需要先打開文件)。3.1.9 delet()模塊功能：刪除文件。3.2 模塊代碼3.2.1 main()模塊int main() input(); running(); return 0; 3.2.2 input()模塊void input() char name; int i; printf(n*n); printf( please choose th

5、e following username（input digital）：n); printf(1.one 2.two 3.three 4.four 5.fine 6.six 7.seven 8.eigh 9.nine 0.ten n); printf(*nn); printf(please input username:); scanf(%s,&name); switch(name) case 1: for(i=0;i10;i+)ufdi=onei;mfd0=use1;running();break; case 2: for(i=0;i10;i+)ufdi=twoi;mfd0=use1;run

6、ning();break; case 3: for(i=0;i10;i+)ufdi=threei;mfd0=use2;running();break; case 4: for(i=0;i10;i+)ufdi=fouri;mfd0=use3;running();break; case 5: for(i=0;i10;i+)ufdi=finei;mfd0=use4;running();break; case 6: for(i=0;i10;i+)ufdi=sixi;mfd0=use5;running();break; case 7: for(i=0;i10;i+)ufdi=seveni;mfd0=us

7、e6;running();break; case 8: for(i=0;i10;i+)ufdi=eighti;mfd0=use7;running();break; case 9: for(i=0;i10;i+)ufdi=ninei;mfd0=use8;running();break; case 0: for(i=0;i10;i+)ufdi=teni;mfd0=use9;running();break; default : printf(enter the user name wrong!n); input(); 3.2.3 running()模塊void running() char orde

8、r; int i; printf(n*n); printf(the user all the files below：n); for(i=0;i10;i+) printf(%s,ufd); printf(t); printf(n*n); printf( choose option（input code）：n); printf(c-create d-delete o-open s-close r-read w-write b-bye t.exit（re-election user）n); printf(n*n); printf(input command:n); scanf(%s,&

9、order); switch(order) case c : create();break; case d : delet();break; case o : open();break; case s : close();break; case r : read();break; case w : write();break; case b : bye();break; case t : input();break; default : printf(input error!nn); running(); 4.心得體會操作系統(tǒng)是計(jì)算機(jī)科學(xué)與技術(shù)專業(yè)中的一門重要基礎(chǔ)課，目的是讓我們了解操作系統(tǒng)的

10、基本概念，理解計(jì)算機(jī)系統(tǒng)的資源如何組織，操作系統(tǒng)如何有效地管理這些系統(tǒng)資源，用戶如何通過操作系統(tǒng)與計(jì)算機(jī)系統(tǒng)打交道。通過課程設(shè)計(jì)，可以進(jìn)一步理解在計(jì)算機(jī)系統(tǒng)上運(yùn)行的其它各類操作系統(tǒng)，并懂得在操作系統(tǒng)的支持下建立自己的應(yīng)用系統(tǒng)。操作系統(tǒng)課程設(shè)計(jì)，對于訓(xùn)練我們掌握程序設(shè)計(jì)、熟悉上機(jī)操作和程序調(diào)試技術(shù)都有重要作用。重點(diǎn)培養(yǎng)我們的思維能力、創(chuàng)新能力和排錯能力。通過課程設(shè)計(jì)，進(jìn)一步融會貫通教材內(nèi)容，掌握程序各功能模塊的工作原理，相互聯(lián)系和來龍去脈，完整地建立系統(tǒng)的概念。激發(fā)我的學(xué)習(xí)熱情和主動性，培養(yǎng)我的獨(dú)立工作能力，在實(shí)踐活動中，將所學(xué)知識綜合運(yùn)用，增長才干，并積累經(jīng)驗(yàn)。對編程語言又有了更深一層次的認(rèn)識

11、，并對編程能力有所加強(qiáng)，但還是很多的不足有待改進(jìn)，對于編程來說還需要大量的實(shí)踐，才能在發(fā)現(xiàn)問題和解決問題中前進(jìn)與提高。5.附錄：源代碼#include #include #include #define null 0 int count=0; struct file char name10; int code; int size; char pwrite; ; struct user char name10; struct file *list; ; struct file one10=a1,0,10,0,a2,2,10,0,a3,1,10,0, a4,2,10,0,a5,2,10,0,a6,

12、2,10,0,a7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file two10=b1,0,10,0,b2,2,10,0,b3,1,10,0, b4,2,10,0,b5,2,10,0,b6,2,10,0,b7,2,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file three10=c1,0,10,0,c2,2,10,0,c3,1,10,0, c4,2,10,0,c5,2,10,0,c6,2,10,0,c7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file four10=d1,0,1

13、0,0,d2,2,10,0,d3,1,10,0, d4,2,10,0,d5,2,10,0,d6,2,10,0,d7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file fine10=e1,0,10,0,e2,2,10,0,e3,1,10,0, e4,2,10,0,e5,2,10,0,e6,2,10,0,e7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file six10=f1,0,10,0,f2,2,10,0,f3,1,10,0, f4,2,10,0,f5,2,10,0,f6,2,10,0,f7,1,10,0,0,0,

14、0,0, 0,0,0,0,0,0,0,0; struct file seven10=g1,0,10,0,g2,2,10,0,g3,1,10,0, g4,2,10,0,g5,2,10,0,g6,2,10,0,g7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file eight10=h1,0,10,0,h2,2,10,0,h3,1,10,0, h4,2,10,0,h5,2,10,0,h6,2,10,0,h7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file nine10=j1,0,10,0,j2,2,10,0,j3,1,

15、10,0, j4,2,10,0,j5,2,10,0,j6,2,10,0,j7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file ten10=k1,0,10,0,k2,2,10,0,k3,1,10,0, k4,2,10,0,k5,2,10,0,k6,2,10,0,k7,1,10,0,0,0,0,0, 0,0,0,0,0,0,0,0; struct file ufd10; struct file afd5=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0; struct user use10=number1,one,number

16、2,two,number3,three,number4,four, number5,fine,number6,six,number7,seven,number8,eight,number9,nine, number10,ten; struct user mfd1=0,0; void running(); void delet(); void write(); void open(); void close(); void bye(); void read(); void create(); void input(); int main() input(); running(); return

17、0; void running() char order; int i; printf(n*n); printf(the user all the files below:n); for(i=0;i10;i+) printf(%s,ufd); printf(t); printf(n*n); printf( choose option: n); printf(c-create d-delete o-open s-close r-read w-write b-bye t.exit n); printf(n*n); printf(input command:n); scanf(%s,&o

18、rder); switch(order) case c : create();break; case d : delet();break; case o : open();break; case s : close();break; case r : read();break; case w : write();break; case b : bye();break; case t : input();break; default : printf(input error!nn);running(); void delet() char name10; int i,flag; do print

19、f(input file name: nn); scanf(%s,&name); flag=0; for(i=0;i10;i+) if(strcmp(ufd,name) flag=1; else flag=0; strcpy(ufd,0); ufdi.code=0; ufdi.pwrite=0; ufdi.size=0; printf(delete success!n); break; if(flag=1) printf(without this file,please enter again!n); while(flag=1); printf(n); running(

20、); void open() char name10; int i,j,flag; if(count=5) printf(run queue is full!n); running(); else do printf(input file name:n); scanf(%s,&name); flag=0; for(i=0;i10;i+) if(strcmp(ufd,name) flag=1; else flag=0; break; if(flag=1) printf(without this file,please enter again!n); while(flag=1); fo

21、r(j=0;j5;j+) if(strcmp(afd,name) flag=1; else flag=0; break; if(flag=1) for(j=0;j5;j+) if(!strcmp(afd,0) afdj=ufdi; printf(the file has been opend!n); count+; break; else printf(the file has been opended in the queue!nn); running(); void close() char name10; int j,flag; printf(input file

22、 name: n); scanf(%s,&name); flag=0; for(j=0;j5;j+) if(strcmp(afd,name) flag=1; else flag=0; strcpy(afd,0); afdj.code=0; afdj.pwrite=0; afdj.size=0; printf(the file has been closed in the run queue!n); break; if(flag=1) printf(run queue without the open file ,please operate again!nn); run

23、ning(); void bye() int i,j; for(i=0;i5;i+) for(j=0;j10;j+) if(!strcmp(afd,ufd) ufdi=afdi; break; printf(the saved file directory!n); printf(end of the operation!n); exit(0); void read() char name10; int j,flag=0; printf(input file name: n); scanf(%s,&name); for(j=0;j5;j+) if(!strcmp(afdj

24、.name,name) flag=1; break; if(flag=1) if(afdj.code=0|afdj.code=2) afdj.pwrite=r; printf(the state of the files are read!n); else printf(no permission to write this file!n); else printf(run queue without this file,please open the file first!n); printf(n); running(); void write() char name10; int j,fl

25、ag=0; printf(input file name: n); scanf(%s,&name); for(j=0;j5;j+) if(!strcmp(afd,name) flag=1; break; if(flag=1) if(afdj.code=1|afdj.code=2) afdj.pwrite=w; printf(the state of the files are write!n); else printf(no permission to write this file!n); else printf(run queue without this file,pleas

26、e open the file first!n); printf(n); running(); void create() char name10; int i,j=0,flag; for(i=0;i9) printf(the folder is full,please delete!n); running(); else do printf(input file name; n); scanf(%s,&name); flag=0; for(i=0;i10;i+) if(!strcmp(ufd,name) printf(file name duplication,please en

27、ter again!n); flag=1; break; while(flag=1); for(i=0;i10;i+) if(!strcmp(ufd,0) strcpy(ufd,name); do printf(please enter the protected codechoose0-2,0-read 1-write 2-read or write:n); scanf(%d,&ufdi.code); if(ufdi.code!=0&ufdi.code!=1&ufdi.code!=2) printf(input error,input protection code again!n); while(ufdi.code!=0&ufdi.code!=1&ufdi.code!=2); printf(please enter the file sizechoose the digital:n); scanf(%d,&ufdi.size); printf(the file has been established!); printf(%s,ufd); printf(n); break; r