c program to head command implementation

C PROGRAM TO HEAD COMMAND

First create a file.i created a file "a.txt" and i have write 20 lines in that file.

#include<stdio.h>

#include<stdlib.h>

#include<fcntl.h>     // to use read only

main(){

int n,fd,count=0;

char buffer[10];

fd=open("a.txt",O_RDONLY);

printf("enter no.of lines");

scanf("%d",&n);

while(1)

{

lseek(fd,0,SEEK_CUR);

read(fd,buffer,1);

printf("%c",buffer[0]);

if(buffer[0]=='\n'){

count++;

}

if(count==n){

break;

}

}

close(fd);

}

OUTPUT: