#include<stdio.h>
#include<fcntl.h>
#include<stdlib.h>
int foo(int , char *, int , int , int, char *);
int openf( char *);
int main(int argc, char * argv[])
{
int fd,pos,skip,b_size,n;
char ch,*buff;
buff = (char*)malloc(sizeof(char));
printf(“\nBlock size: “);
scanf(“%d”,&b_size);
printf(“\nNumber of Blocks: “);
scanf(“%d”,&n);
printf(“\nBytes to be skiped after each block: “);
scanf(“%d”,&skip);
fd = openf(argv[1]);
foo(fd,buff,b_size,n,skip,argv[1]);
close(fd);
}
int foo(int fd, char *buff, int b_size, int n, int skip ,char * f)
{
char ch;
int i=0,j=0,k=0,m=0;
printf(“\nPHASE ONE DONE!!\n”);
while(1)
{
i=0;
for(j=0;;j++)
{ if(j>=n)goto i;
for(k=0; k < b_size; k++)
{
if (!(read(fd, &ch, 1)) || ch==0)
i: goto o;
*(buff+k) = ch;
buff = realloc(buff,k+1);
}
for(m=0;m < skip;m++)
read(fd, &ch, 1);
printf(“\n%s**\n”,buff);
free(buff);
buff = (char*)malloc(sizeof(char));
}
}
o:printf(“\n%d blocks of size %d skipping %d bits after each read are read form file %s\n”,n,b_size,skip,f);
}
int openf(char * s)
{
int fd;
fd = open(s,O_RDWR|O_CREAT,0666);
if(fd < 1)
perror(“open error”);
else
printf(“input file open succesfull fd = %d\n”,fd);
return fd;
}
