wenjian.c

广东工业大学操作系统课程设计（全） 广东工业大学操作系统课程设计（全 ）

      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);}
}