filesystem.c

用TC编写的文件管理系统

      fclose(fp_file);

      fcount[i]++;

      while(flag)

      {printf("Input text now(Y/N):");

       gets(a);

       ltrim(rtrim(a));

       ufd[i]->ufdfile[fcount[i]-1].flength=0;

       if(strcmp(strupr(a),"Y")==0)

        {fp_file=fopen(str,"wb+");

         ufd[i]->ufdfile[fcount[i]-1].flength=WriteF1();

         flag=0;

       }

       else if(strcmp(strupr(a),"N")==0){flag=0;wgetchar=1;}

      }

      printf("\n\'%s\' has been created successfully!\n",fname);

     }

       else

    {printf("\nFail!No Disk Space. Please format your disk.\n");wgetchar=1;}

      }

      else {printf("\nError. FileMode\'s Range is 0-3\n");wgetchar=1;}

   }}

}

 

int ExistF(char *filename)  /*Whether FileName Exist,Exist-i,Not Exist-0*/

{int i,j;

 int exist=0;

 int ExistD(char *dirname);

 j=ExistD(dirname);

 for(i=0;i<fcount[j];i++)

   if (strcmp(strupr(ufd[j]->ufdfile[i].fname),strupr(filename))==0)

      {exist=1;

       break;

      }

 if (exist) return(i);

 else return(-1);

}

 

int FindPANo()  /*find out physical address num*/

{int i;

 for(i=0;i<MAX;i++)

   if (fpaddrno[i]==0) {fpaddrno[i]=1;break;}

 if (i<MAX) return(i);

 else return(-1);

}

 

int WriteF1()  /*write file*/

{int length=0;

 char c;

 printf("Please input text(\'#\' stands for end):\n");

 while((c=getchar())!='#')

 {fprintf(fp_file,"%c",c);

  if (c!='\n') length++;

 }

 fprintf(fp_file,"\n");

 fclose(fp_file);

 return(length);

}

 

void DeleteF() /*Delete File*/

{char fname[MAXNAME];

 char str[50],str1[50];

 int i,j,k,flag=1;

 char a[25]; /*whether delete*/

 char *rtrim(char *str);  /*remove the trailing blanks.*/

 char *ltrim(char *str);  /*remove the heading blanks.*/

 int ExistF(char *filename);  /*Whether FileName Exist,Exist-i,Not Exist-0*/

 int ExistD(char *dirname);

 if (strcmp(strupr(dirname),strupr(username))!=0)

 {printf("\nError. You can only delete file in your own dir.\n");wgetchar=1;}

 else

 {printf("\nPlease input FileName:");

 gets(fname);

 ltrim(rtrim(fname));

 i=ExistF(fname);

 if (i>=0)

    {k=ExistD(username);

     if(ifopen[k][i].ifopen==1)

      {printf("\nError. \'%s\' is in open status. Close it before delete.\n",fname);wgetchar=1;}

     else

     {

      while(flag)

       {printf("\'%s\' will be deleted. Are you sure(Y/N):",fname);

    gets(a);

    ltrim(rtrim(a));

    if(strcmp(strupr(a),"Y")==0)

    {fpaddrno[ufd[k]->ufdfile[i].fpaddr]=0;

    itoa(ufd[k]->ufdfile[i].fpaddr,str,10);

    for(j=i;j<fcount[k]-1;j++)

      {strcpy(ufd[k]->ufdfile[j].fname,ufd[k]->ufdfile[j+1].fname);

       ufd[k]->ufdfile[j].fpaddr=ufd[k]->ufdfile[j+1].fpaddr;

       ufd[k]->ufdfile[j].flength=ufd[k]->ufdfile[j+1].flength;

       ufd[k]->ufdfile[j].fmode=ufd[k]->ufdfile[j+1].fmode;

       ifopen[k][j]=ifopen[k][j+1];

      }

    fcount[k]--;

    strcpy(str1,"c:\\osfile\\file\\file");

    strcat(str1,str);

    remove(str1);

    flag=0;

    printf("\n\'%s\' has been deleted successfully.\n",fname);

    wgetchar=1;

       }

     else if(strcmp(strupr(a),"N")==0)

     {printf("\nError. \'%s\' hasn\'t been deleted.\n",fname);

      wgetchar=1;

      flag=0;}

      }}}

 else

   {printf("\nError. \'%s\' does not exist.\n",fname);wgetchar=1;}}

}

 

void ModifyFM() /*Modify FileMode*/

{char fname[MAXNAME],str[50];

 int i,j,k,flag;

 char fmode[25]; /*whether delete*/

 char *rtrim(char *str);  /*remove the trailing blanks.*/

 char *ltrim(char *str);  /*remove the heading blanks.*/

 void InputPW(char *password);  /*input password,use '*' replace*/

 void SetPANo(int RorW);  /*Set physical address num*/

 int ExistF(char *filename);  /*Whether FileName Exist,Exist-i,Not Exist-0*/

 int ExistD(char *dirname);

 if (strcmp(strupr(dirname),strupr(username))!=0) {printf("\nError.You can only modify filemode in yourself dir.\n");wgetchar=1;}

 else

{ printf("\nPlease input FileName:");

 gets(fname);

 ltrim(rtrim(fname));

 i=ExistF(fname);

 if (i>=0)

    {k=ExistD(username);

     if(ifopen[k][i].ifopen==1)

     {printf("\nError.\'%s\' is in open status. Close it before modify.\n",fname);wgetchar=1;}

     else

     {

     if(ufd[k]->ufdfile[i].fmode==0) strcpy(str,"read only");    /*FileMode*/

     else if(ufd[k]->ufdfile[i].fmode==1) strcpy(str,"write only");

     else if(ufd[k]->ufdfile[i].fmode==2) strcpy(str,"read and write");

     else strcpy(str,"Protect");

 

     printf("\'%s\' filemode is %s.\n",fname,strupr(str));

     printf("Modify to(0-read only,1-write only,2-read and write,3-Protect):");

     gets(fmode);

     ltrim(rtrim(fmode));

     if(strcmp(fmode,"0")==0)

       {ufd[k]->ufdfile[i].fmode=0;

    printf("\n\'%s\' has been modified to READ ONLY mode successfully.\n",fname);

    wgetchar=1;

       }

     else if(strcmp(fmode,"1")==0)

       {ufd[k]->ufdfile[i].fmode=1;

    printf("\n\'%s\' has been modified to WRITE ONLY mode successfully.\n",fname);

    wgetchar=1;

       }

     else if(strcmp(fmode,"2")==0)

       {ufd[k]->ufdfile[i].fmode=2;

    printf("\n\'%s\' has been modified to READ AND WRITE mode successfully.\n",fname);

    wgetchar=1;

       }

     else if(strcmp(fmode,"3")==0)

       {ufd[k]->ufdfile[i].fmode=3;

    printf("\n\'%s\' has been modified to FORBID mode successfully.\n",fname);

    wgetchar=1;

       }

     else {printf("\nError.\'%s\' is not modified.\n",fname);wgetchar=1;}

    }

  }

 else

   {printf("\nError. \'%s\' dose not exist.\n",fname);wgetchar=1;}}

}

 

 

void OpenF() /*Open File*/

{char fname[MAXNAME];

 char str[25],str1[25],fmode[25];

 int i,k;

 char *rtrim(char *str);  /*remove the trailing blanks.*/

 char *ltrim(char *str);  /*remove the heading blanks.*/

 int ExistF(char *filename);  /*Whether FileName Exist,Exist-i,Not Exist-0*/

 int ExistD(char *dirname);

 if (strcmp(strupr(ltrim(rtrim(dirname))),"")==0)

 {printf("\nError. Please change to ufd dir before open.\n");wgetchar=1;return;}

 printf("\nPlease input FileName:");

 gets(fname);

 ltrim(rtrim(fname));

 i=ExistF(fname);

 if (i>=0)

  {k=ExistD(dirname);

   if(!ifopen[k][i].ifopen)

    {if (ufd[k]->ufdfile[i].fmode==3)

    {printf("\nError. The file\'s mode is FORBID. Can not open.\n");wgetchar=1;}

     else

     {printf("Please input FileOpenMode(0-Read Only,1-Write Only,2-Read and Write):");

     gets(fmode);

     ltrim(rtrim(fmode));

     if((strcmp(fmode,"0")==0)||(strcmp(fmode,"1")==0)||(strcmp(fmode,"2")==0))

     {if(fmode[0]=='0')   /*open file with read only mode*/

    {strcpy(str,"read only");

     if((ufd[k]->ufdfile[i].fmode==0)||(ufd[k]->ufdfile[i].fmode==2)) ifopen[k][i].ifopen=1;

    }

      else if(fmode[0]=='1') /*open file with write only mode*/

    {strcpy(str,"write only");

     if((ufd[k]->ufdfile[i].fmode==1)||(ufd[k]->ufdfile[i].fmode==2)) ifopen[k][i].ifopen=1;

    }

      else if(fmode[0]=='2')  /*open file with read and write mode*/

    {strcpy(str,"read and write");

     if(ufd[k]->ufdfile[i].fmode==2) ifopen[k][i].ifopen=1;

    }

      if(ufd[k]->ufdfile[i].fmode==0) strcpy(str1,"read only");    /*FileMode*/

      else if(ufd[k]->ufdfile[i].fmode==1) strcpy(str1,"write only");

      else if(ufd[k]->ufdfile[i].fmode==2) strcpy(str1,"read and write");

      if(ifopen[k][i].ifopen==1)

    {ifopen[k][i].openmode=atoi(fmode);

     if (ifopen[k][i].openmode==0) strcpy(str,"read only");

     else if(ifopen[k][i].openmode==1) strcpy(str,"write only");

     else if(ifopen[k][i].openmode==2) strcpy(str,"read and write");

     printf("\n\'%s\' has been opened. OpenMode is %s,FileMode is %s\n",fname,strupr(str),strupr(str1));

     wgetchar=1;

    }

       else

       {printf("\nError. \'%s\' hasn\'t been opened. OpenMode Error. OpenMode is %s,but FileMode is %s\n",fname,strupr(str),strupr(str1));wgetchar=1;}

     }

     else {printf("\nError. FileOpenMode\'s Range is 0-2\n");wgetchar=1;}

     }}

    else {printf("\nError. \'%s\' is in open status.\n",fname);wgetchar=1;}

   }

 else

   {printf("\nError. \'%s\' does not exist.\n",fname);wgetchar=1;}

}

 

void CloseF() /*Close File*/

{int i,k,n=0;

 char fname[MAXNAME];

 char *rtrim(char *str);  /*remove the trailing blanks.*/

 char *ltrim(char *str);  /*remove the heading blanks.*/

 int ExistF(char *filename);  /*Whether FileName Exist,Exist-i,Not Exist-0*/

 int ExistD(char *dirname);

 if (strcmp(strupr(ltrim(rtrim(dirname))),"")==0)

 {printf("\nError. Please convert to ufd dir before close.\n");wgetchar=1;return;}

 k=ExistD(dirname);

 printf("\nOpen File(s) In This Ufd:\n");/*display openned file*/

 for(i=0;i<fcount[k];i++)

   {if (ifopen[k][i].ifopen==1) {printf("%15s",ufd[k]->ufdfile[i].fname);n++;}

    if((n%4==0)&&(n!=0)) printf("\n");

   }

 printf("\n%d files openned.\n",n);

 if (n==0) wgetchar=1;

 if(n!=0)

{printf("\nPlease input FileName:");

 gets(fname);

 ltrim(rtrim(fname));

 i=ExistF(fname);

 if(i>=0)

  {if(ifopen[k][i].ifopen==1)

   {ifopen[k][i].ifopen=0;

    ifopen[k][i].openmode=4;

    printf("\n\'%s\' has been closed successfully.\n",fname);

    wgetchar=1;

   }

   else {printf("\nError.\'%s\' is in closing status.\n",fname);wgetchar=1;}

  }

 else {printf("\nError. \'%s\' is not exist.\n",fname);wgetchar=1;}

}

}

 

void ReadF() /*Read File*/

{int i,k,n=0;

 char fname[MAXNAME];

 char str[255],str1[255],c;

 char *rtrim(char *str);  /*remove the trailing blanks.*/

 char *ltrim(char *str);  /*remove the heading blanks.*/

 int ExistF(char *filename);  /*Whether FileName Exist,Exist-i,Not Exist-0*/

 int ExistD(char *dirname);

 if (strcmp(strupr(ltrim(rtrim(dirname))),"")==0) {printf("\nError.Please convert to ufd dir before read.\n");wgetchar=1;return;}

 printf("\nCaution:Open file first\n");

 printf("Opened File(s) List:\n");

 k=ExistD(dirname);

 for(i=0;i<fcount[k];i++)

   {if (ifopen[k][i].ifopen==1)

     if ((ifopen[k][i].openmode==0) ||(ifopen[k][i].openmode==2)) {printf("%15s",ufd[k]->ufdfile[i].fname);n++;}

    if((n%4==0)&&(n!=0)) printf("\n");

   }

 printf("\n%d files openned.\n",n);

 if (n==0) wgetchar=1;

 if(n!=0)

{printf("\nPlease input FileName:");

 gets(fname);

 ltrim(rtrim(fname));

 i=ExistF(fname);

 if(i>=0)

  {if(ifopen[k][i].ifopen==1)

   {if((ifopen[k][i].openmode==0) ||(ifopen[k][i].openmode==2))

     {itoa(ufd[k]->ufdfile[i].fpaddr,str,10);

      strcpy(str1,"file");

      strcat(str1,str);

      strcpy(str,"c:\\osfile\\file\\");

      strcat(str,str1);

      fp_file=fopen(str,"rb");

      fseek(fp_file,0,0);

      printf("\nThe text is:\n\n");

      printf("   ");

      while(fscanf(fp_file,"%c",&c)!=EOF)

       if (c=='\n') printf("\n   ");

       else printf("%c",c);

      printf("\n\n%d Length.\n",ufd[k]->ufdfile[i].flength);

      fclose(fp_file);

      wgetchar=1;

     }

    else

    {printf("\nError.\'%s\' has been opened with WRITE ONLY mode. It isn\'t read.\n",fname);wgetchar=1;}

   }

   else {printf("\nError.\'%s\' is in closing status. Please open it before read\n",fname);wgetchar=1;}

  }

 else {printf("\nError. \'%s\' does not exist.\n",fname);wgetchar=1;}

}

}

 

void WriteF() /*Write File*/

{int i,k,n=0;

 char fname[MAXNAME];

 char str[50],str1[50],a[50];

 char *rtrim(char *str);  /*remove the trailing blanks.*/

 char *ltrim(char *str);  /*remove the heading blanks.*/

 int ExistF(char *filename);  /*Whether FileName Exist,Exist-i,Not Exist-0*/

 int ExistD(char *dirname);

 int WriteF1(); /*write file*/

 if (strcmp(strupr(ltrim(rtrim(dirname))),"")==0) {printf("\nError. Please convert to ufd dir before write.\n");wgetchar=1;return;}

 k=ExistD(dirname);

 printf("\nOpen File(s) with write only mode or read and write mode:\n");/*display openned files with writable mode*/

 for(i=0;i<fcount[k];i++)

   {if (ifopen[k][i].ifopen==1)

     if ((ifopen[k][i].openmode==1) ||(ifopen[k][i].openmode==2)) {printf("%15s",ufd[k]->ufdfile[i].fname);n++;}

    if((n%4==0)&&(n!=0)) printf("\n");

   }

 printf("\n%d files open.\n",n);

 if (n==0) wgetchar=1;

 if(n!=0)

{printf("\nPlease input FileName:");

 gets(fname);

 ltrim(rtrim(fname));

 i=ExistF(fname);

 if(i>=0)

  {if(ifopen[k][i].ifopen==1)

   {if((ifopen[k][i].openmode==1) ||(ifopen[k][i].openmode==2))

     {itoa(ufd[k]->ufdfile[i].fpaddr,str,10);

      strcpy(str1,"file");

      strcat(str1,str);

      strcpy(str,"c:\\osfile\\file\\");

      strcat(str,str1);

      if (ufd[k]->ufdfile[i].flength!=0)

    {printf("\n\'%s\' has text. Overwrite or Append(O-overwrite,A-Append,else-not write):",fname);

     gets(a);

     ltrim(rtrim(a));

     if (fp_file!=NULL) fclose(fp_file);

     if (strcmp(strupr(a),"O")==0)

       {printf("\nOverwrite\n");

        fp_file=fopen(str,"wb");

        ufd[k]->ufdfile[i].flength=0;

        ufd[k]->ufdfile[i].flength=WriteF1();

       }

     else if(strcmp(strupr(a),"A")==0)

       {printf("\nAppend\n");

        fp_file=fopen(str,"ab");

        ufd[k]->ufdfile[i].flength=ufd[k]->ufdfile[i].flength+WriteF1();

       }

     else

       {printf("\nError.\'%s\' has not been written.\n",fname);

        fclose(fp_file);

        wgetchar=1;

       }

    }

       else

     {fp_file=fopen(str,"wb");

      ufd[k]->ufdfile[i].flength=WriteF1();

     }

     }

    else

    {printf("\nError. \'%s\' has been opened with read only mode.It isn\'t writed.\n",fname);wgetchar=1;}

   }

   else

    {printf("\nError. \'%s\' is in closing status. Please open it before write\n",fname);wgetchar=1;}

  }

 else

  {printf("\nError. \'%s\' does not exist.\n",fname);wgetchar=1;}

}

}

 

void QuitF() /*Quit FileSystem*/

{int i,j;

 char str[50];

 void SetPANo(int RorW);  /*Set physical address num,0-read,1-write*/

 SetPANo(1);

 if (fp_mfd!=NULL) fclose(fp_mfd);

 if (fp_ufd!=NULL) fclose(fp_ufd);

 if (fp_file!=NULL) fclose(fp_file);

 for(j=0;j<ucount;j++)

{strcpy(str,"c:\\osfile\\");

 strcat(str,ufd[j]->ufdname);

 ltrim(rtrim(str));

 fp_ufd=fopen(str,"wb");

 fclose(fp_ufd);

 fp_ufd=fopen(str,"ab");

 for(i=0;i<fcount[j];i++)

   fwrite(&ufd[j]->ufdfile[i],sizeof(OSFILE),1,fp_ufd);

 fclose(fp_ufd);}

}