Child getline problem

main.c

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char* argv[])
{
        pid_t _pid;
//      int _pipe[2];   
//      pipe(_pipe);
        _pid = fork();
        char buff[256];
        int _scanned;
        int len = 100;  
        
        if(_pid == 0)
        {
                printf("\nChild process.. %d\n",_pid);
                printf("Please enter your details...\n");
                _scanned = getline(&buff,&len,stdin);
                printf("%s\n",buff);
                printf("Done...");
        }
        else
        {

        }


                
        return 0;

}