操作系統(tǒng)試驗(yàn)文件管理C代碼

1、實(shí)驗(yàn)文件管理C代碼Standardization ofsany group #QS8QHH-HHGX8Q8-GNHHJ8-HHMHGN#include<stack> using namespace std;#define BLKSIZE 512.n");printf("WARNING:ALL DATA ON THIS FILESYSTEM WILL BE LOST!n");printf (''Proceed with Format(Y/N)");scanf(“c", &choice);getchar ();i

2、f (choice 二二'y') (choice 二二'Y')if(fp=fopen(image_name, "w+b")二二 NULL)printf ("Cdn't create file %sn/z, image_name); exit(-1);for(i = 0; i < BLKSIZE; i+)fputc" 0, fp);二 0；strcpy, 7");二d，;strcpy, 7");二 0；二 0；0二-1;11 二-1;fwrite(&inode, sizeof(Ino

3、de), 1, fp);二-1；for(i 二 0; i < 31; i+)fwrite(&inode, sizeof(Inode), 1, fp);for(i 二 0; i < BLKNUMBLKSIZE; i+)fputc('0', fp);fclose(fp);n", file_name);printf (''This filesystem not exist, it will be create!n/?);format ();login ();while(!feof(fp)fread(&user, sizeof(Us

4、er), 1, fp); n );flag 二 1;fclose(fp);break;if(flag 二二 0) break;while(flag);rT, image_name);exit(-1);num = T;)；exit (T);bitmapi二1'if(fp=fopen(image_name, "r+b")二二 NULL)printf (zzCan，t open file %sn： image_name); exit (T);fseek(fp, i, SEEK_SET);fputc(, r, fp)； fclose(fp);return i;ength;a

5、ddO = inode_arraynumaddress0;if(len > 512)addl = inode_arraynumaddress1;if(fp = fopen(image_name, "r+b")二二 NULL)printf ("Can't open file %s. n", image_name);exit (-1);fseek(fp, BLKSIZE+INODESIZE*INODENUM +addO*BLKSIZE, SEEK.SET);ch 二 fgetc(fp);for(i=0; (i < len) &&a

6、mp; (ch != ' 0)&& (i < 512); i+)ch 二 fgetc(fp);辻(i >= 512)fseek(fp,BLKSIZE+INODESIZE*INODENUM+addl*BLKSIZE, SEEK.SET);ch = fgetc(fp);for(; (i < len) && (ch '0'); i+)tempi = ch;ch = fgetc(fp);tempi = ' 0'fclose(fp); ddress 0;len = inode_arraynumlength;if(f

7、p = fopen(image_name, :r+b") = NULL)printf CCan t open file %s. rT，image_name);exit (-1);fseek(fp, BLKSIZE+INODESIZE*INODENUM+addO>：<BLKSIZE, SEEK.SET);for (i=0; (i<len)&&(tempi !=, 0J )&&(i < 512); i+)fputc(tempi, fp);辻(i 二二 512)addl = inode_arraynumaddress1;fseek(f

8、p, BLKSIZE+INODESIZE*INODENUM+add1*BLKSIZE, SEEK_SET);for(; (i < len) && (tempi != '0)； i+) fputc(tempi, fp);fputc(, 0, fp);fclose(fp);num = 0)strcpy(path,;elsestrcpy(path,;m=0;n=inum_cur;while(m != inum_cur)whi1e(inodearrayniparent != m)n = inode_arrayniparent:strcat(path,"/&quo

9、t;);strcat(path, inode_arrayn. file_name); m = n;n 二 inum_cur;printfC%s$”, path);或者 cd dirl)void cd(void)int i;if(argc != 2)printf("Command cd must have two args. n");return ;if(! strcmp (argv1,"")inum_cur = inode_arrayinum_curiparent;elsefor(i = 0; i < INODENUM; i+)if(inode_a

10、rrayi inum>0)&&(inode_arrayi type二二'd，)&&(inode_arrayi iparent二二inum_cu:r)&&!strcmp(inode_arrayi f訂e_name,argvl)&&! strcmp (inode_array i user_ndnie,)break;辻(i 二二 INODENUM)printfC'This directory isn't exsitedn)；elseinumcur = i;n");return ;num> 0

11、) &&(inode_arrayiiparent = inum_cur)&&!strcmp(inode_arrayi user_name,)if(inode_arrayi type = ' d)dcount+;printf C，%-20s<DIR>n/ inode_arrayi file_name);elsefcount+;bcount+=inode_arrayilength;printf Cz%-20s%12d bytes'n",inode_arrayi filename, inode_arrayi length);pri

12、ntf (zzn%d file(s)%lld bytesnz，, fcount, bcount);printf C%d dir(s) %lld bytesFreeSpacen/z, dcount, 1024*1024-bcount);n");return ;num < 0) break;辻(i 二二 INODENUM)printf (Z/Inode is full. rT);exit(-1);inode_arrayiinum 二 i;strcpy(inode_arrayi file_ndme, argvl);inode_arrayitype 二'd'strcpy

13、 (inode_array i usei?_ndnie,;inode_arrayiiparent = inum_cur;inode_arrayilength = 0;save_inode(i);）；return ;for(i = 0; i < INODENUM; i+)if(inode_arrayiinum > 0) &&(inode_arrayi. type 二二'f') &&!strcmp(inode_arrayi. file_name, argvl)printf (''This file is exsit. n&

14、quot;);return ;for(i = 0; i < INODENUM; i+)if(inode_arrayi. inum < 0) break;辻(i 二二 INODEXUM)printf (，zInode is full. n");exit(-1);inode_arrayi. inum = i;strcpy(inode_arrayi. file_name, argvl);inode_arrayitype 二'f'strcpy(inode_arrayi user_ndme,;inode_arrayiiparent = inum_cur;inode_

15、arrayilength = 0;save_inode(i);n");return ;for(i = 0; i < INODENUM; i+)if(inode_arrayiinum > 0) &&(inode_arrayi type = F) &&!strcmp(inode_arrayi filename, argvl)&&! strcmp (inode_array i user_name,)break;if(i 二二 INODENUM)printf (z，The file you want to open doesn

16、9;t exsited )；return ;inum = i:printf (''Please input open mode: (1: read, 2: write, 3: read and write):)；scanf&mode);getchar ();辻(mode < 1) (mode >3)printf (/z0pen mode is wrong )；return;for(i 二 0; i < FILENUM; i+)if(file_arrayiinum < 0) break;if(i 二二 FILENUM)printf (Z/The f

17、ile table is full, please close some file )；return ;filenum 二 i;f i1e_arrayf i1enuminum = inum;strcpy(file_arrayfi1enum file_ndme, inode_arrayinum. file_name);f i1e_arrayf i1enummode = mode;printf ('"Open file %s by "、fi 1 e_arrayfi 1 enumf訂e_name);if (mode = 1) printf (z，read only. n&

18、quot;);else if(mode = 2) printf("write only.n");else printf C'read and write rT);n");return;for(i = 0; i < FILENUM; i+)if(file_arrayiinum > 0) &&!strcmp(fi1e_arrayi file_name, argvl) break;辻(i 二二 FILENUM)printf("Open %s firstn， argvl);return ;else if(file_arrayi

19、.mode = 2)printf ("Can't read %s. n，argvl);return ;inum = file_arrayiinum;printf (z，The length of %s:%d n", argvl, inode_arrayinumlength);if(inode_arrayinumlength > 0)read_blk(inum);for(i = 0; (i < inode_arrayinumlength) && (tempi != '0)； i+) printf (，/%c， tempi);n&qu

20、ot;);return ;for(i = 0; i < FILENUM; i+)if(file_arrayi. inum0)&&! strcmp(file_arrayi file_nanie, argvl) break;if(i 二二 FILENUM)printf ("'Open %s first rT, argvl);return ;else if(file_arrayi.mode = 1)printf CCan t write %s. n", argvl);return ;inum = file_arrayprintf ("The

21、 length of %s:%dnz/, inode_arrayinumfile_name,inode_arrayinum, length);if(inode_arrayinum1ength = 0)inode_arrayinum, address0 = get_blknum(); printf ("'Input the data(CTRL+Z to end):rT); wh訂e(i<1023&&(tempi二getchar()!=E0F) i+;length=strlen(temp)+1;inode_arrayinumlength二length;if(

22、length > 512)inode_arrayinum, address1 = get_blknum(); save_inode(inum);write_blk(inum);elseprintf (z，This file can't be writte n. rT);n");return ;for(i = 0; i < FILENUM; i+)! strcmp(filearray i fi 1 e_nanie, argvl) break;if(file_arrayiinum > 0) &&if(i 二二 FILENUM)printf (zz

23、This file doesn't be opened n"); return ;elsefilearray iinum = T;printf (z，Close %s success!n argvl);num = T;if(inode_arrayilength > 0)if(inode_arrayilength >= 512)release_blk(inode_arrayi address0);release_blk(inode_arrayi address1); save_inode(i);n");:return ;int n, t, i ;stack

24、<int> istk;for(i = 0; i < INODENUM; i+)num >=0) &&(inode_arrayiiparent = inum_cur)&&(!strcmp(inode_arrayi file_name, argvl)&&(! strcmp (inode_array i use:r_ndnie,)break;辻(i=INODENUM) puts ("Directory ERROR");else(n);while(!()t=()；0;del(t);for(i = 0; i &l

25、t; INODENUM; i+)if(inode_arrayil. inum >=0) &&(inode_drrdyi. iparent 二二 t)(i)；/功能：退出當(dāng)前用戶(logout)void logout ()printf (/zDo you want to exit this user (y/n)/z);scanf (z，%c/z, &choice);getchar ();if (choice = ') (choice = 'Y')printf CAnCurrent user has exited!nz，);login ();return ;/功能：退出文件系統(tǒng)(quit)void quit ()printf C'Do you want to exist (y/n);scanf (，z%c/z, &choice);getchar ();if (choice