Operating Systems Lab Cycle - V Programs

 

Cycle-5: Simulate all File Organization techniques

---------------------------------------------------------------------------

a)   Write a C program to simulate Single Level Directory file Organization technique

Aim: To write a C program for simulating Single level Directory file Organization technique

Program:

#include<stdio.h>
//#include<conio.h>
#include<string.h>
void main()
{
int nf=0,i=0,j=0,ch;
char mdname[10],fname[10][10],name[10];
//clrscr();
printf("Enter the directory name:");
scanf("%s",mdname);
printf("Enter the number of files:");
scanf("%d",&nf);
do
{
printf("Enter file name to be created:");
scanf("%s",name);
for(i=0;i<nf;i++)
{
if(!strcmp(name,fname[i]))
break;
}
if(i==nf)
{
strcpy(fname[j++],name);
nf++;
}
else
printf("There is already %s\n",name);
printf("Do you want to enter another file(yes - 1 or no - 0):");
scanf("%d",&ch);
}
while(ch==1);
printf("Directory name is:%s\n",mdname);
printf("Files names are:");
for(i=0;i<j;i++)
printf("\n%s",fname[i]);
//getch();
}
 

Output:

 

Enter the directory name:abc

Enter the number of files:2

Enter file name to be created:aaa

Do you want to enter another file(yes - 1 or no - 0):1

Enter file name to be created:bbb

Do you want to enter another file(yes - 1 or no - 0):0

Directory name is:abc

Files names are:

aaa

bbb

 

b)  Write a C program to simulate Two Level Directory file Organization technique

Aim: To write a C program for simulating Two level Directory file Organization technique

Pogram:

 
#include<stdio.h>
//#include<conio.h>
#include<string.h>
struct st
{
char dname[10];
char sdname[10][10];
char fname[10][10][10];
int ds,sds[10];
}dir[10];
void main()
{
int i,j,k,n;
//clrscr();
printf("enter number of directories:");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("enter directory %d names:",i+1);
scanf("%s",dir[i].dname);
printf("enter size of directories:");
scanf("%d",&dir[i].ds);
for(j=0;j<dir[i].ds;j++)
{
printf("enter subdirectory name and size:");
scanf("%s",dir[i].sdname[j]);
scanf("%d",&dir[i].sds[j]);
for(k=0;k<dir[i].sds[j];k++)
{
printf("enter file name:");
scanf("%s",dir[i].fname[j][k]);
}
}
}
printf("\ndirname\t\tsize\tsubdirname\tsize\tfiles");
printf("\n******************************************************\n");
for(i=0;i<n;i++)
{
printf("%s\t\t%d",dir[i].dname,dir[i].ds);
for(j=0;j<dir[i].ds;j++)
{
printf("\t%s\t\t%d\t",dir[i].sdname[j],dir[i].sds[j]);
for(k=0;k<dir[i].sds[j];k++)
printf("%s\t",dir[i].fname[j][k]);
printf("\n\t\t");
}
printf("\n");
}
//getch();    
}
 

OUTPUT:

enter number of directories:1

enter directory 1 names:aaa

enter size of directories:2

enter subdirectory name and size:abc 2

enter file name:bb

enter file name:cc

enter subdirectory name and size:def 2

enter file name:dd

enter file name:ee

 

dirname         size    subdirname      size    files

******************************************************

aaa                   2              abc             2       bb      cc

                                        def             2       dd      ee

c)Write a C program to simulate Hierarchical Level Directory file Organization technique

 

Aim: To write a C program for simulating Single level Directory file Organization technique

Program:

#include<stdio.h>
#include<stdlib.h>
struct node{
char N[25];
int df;
struct node *pc;
struct node *ps;
};
struct node *A[20];
int in = 0,c = 0;
void create(struct node *P,int N)
{
int i;
struct node *Tmp,*T;
Tmp = P;
for(i = 0 ;i<N;i++)
{
T = malloc(sizeof(struct node));
printf("Enter name:");
scanf("%s",T->N);
printf("Enter dir(1) or file(0): ");
scanf("%d",&T->df);
if(T-> df == 1)
{
A[c] = T;
c++;
}
T->pc = NULL;
T->ps = NULL;
if(i == 0)
{
Tmp -> pc = T;
Tmp = T;
}
else{
Tmp -> ps = T;
Tmp = T;
}
}
}
void display(struct node *P)
{
int i;
P = P->pc;
do{
printf("\n%s(%d)",P->N,P->df);
if(P->df == 1 && P->pc != NULL)
display(P);
P = P->ps;
}while(P!=NULL);
}
void main()
{
int nu,nc,i,j,k;
struct node *Hdr;
Hdr = malloc(sizeof(struct node));
Hdr->df = 1;
Hdr->pc = NULL;
Hdr->ps = NULL;
printf("Enter number of users: ");
scanf("%d",&nu);
create(Hdr,nu);
for(in = 0;in<c;in++)
{
printf("\nEnter number of child nodes for %s: ",A[in]->N);
scanf("%d",&nc);
create(A[in],nc);
}
printf("\nHierarchical\n");
display(Hdr);
}

Output:
 
Enter number of users: 1
Enter name:aaa
Enter dir(1) or file(0): 1
 
Enter number of child nodes for aaa: 2
Enter name:file1
Enter dir(1) or file(0): 0
Enter name:file2
Enter dir(1) or file(0): 1
 
Enter number of child nodes for file2: 0
 
Hierarchical
 
aaa(1)
file1(0)
file2(1)


d)Write a C program to simulate DAG file Organization technique

Aim: To write a C program for simulating DAG file Organization technique

Program:

#include<stdio.h>
//#include<conio.h>
#include<string.h>
struct node
{
char N[25];
int df;
struct node *ptr;
};
struct node *A[20];
int in=0;c=0;
 void display()
 {
  int i;
  struct node *P;
  for(i=0;i<c;i++)
  {
   P = A[i];
   printf("\n%s(%d)",P->N,P->df);
   P = P->ptr;
   
   while(P!= NULL)
   {
    printf("->%s(%d)",P->N,P->df);
    P = P->ptr;
    }
   }
  }
  void DAG()
  {
  struct node *T,*P,*Tmp;
  int i,j,Flag,nv;
  for(in=0;in<c;in++)
  {
   P = A[in];
   printf("\n enter no.of adjacent vertices for %s:",A[in]->N);
   scanf("%d",&nv);
   for(i=0;i<nv;i++)
   {
    T = malloc(sizeof(struct node));
    printf("enter name");
    scanf("%s",T->N);
    printf("enter dir(1) or file(0):");
    scanf("%d",&T->df);
    T->ptr = T;
    P=T;
    if(T->df==1)
    {
     Flag = 1;
     for(j=0;j<c;j++)
     {
      if(strcmp(A[j]->N,T->N)==0)
      {
      Flag = 0;
      break;
      }
     }
    if(Flag==1)
    {
     Tmp = malloc(sizeof(struct node));
     strcpy(Tmp->N,T->N);
     Tmp->df = T->df;
     Tmp->ptr = NULL;
     A[c] = Tmp;
     c++;
    }
    }
    }
    }
    }
    void create(int N)
    {
     int i;
     struct node *T;
     for(i=0;i<N;i++)
     {
      T = malloc(sizeof(struct node));
      printf("enter name:");
      scanf("%s",T->N);
      printf("enter dir(1) or file(0):");
      scanf("%d",&T->df);
      T->ptr=NULL;
      A[c]=T;
      c++;
     }
     }
     void main()
     {
     int nu;
     //clrscr();
     printf("enter no.of users:");
     scanf("%d",&nu);
     create(nu);
     DAG();
     printf("\n DAG - adjancey list representation\n");
     display();
     //getch();
    }      
 

 Output:

enter no.of users:2

enter name:abc

enter dir(1) or file(0):1

enter name:def

enter dir(1) or file(0):0

 

enter no.of adjacent vertices for abc:2

enter name:aaa

enter dir(1) or file(0):0

enter name:bbb

enter dir(1) or file(0):0

 

enter no.of adjacent vertices for def:1

enter name: hhh

enter dir(1) or file(0):0

 

 DAG - adjancey list representation

 

abc(1)

def(0)

 

 

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