#include <stdlib.h>
#include <fcntl.h>
#include <string.h>

int main(int argc, char* argv[])
{
  char buffer[512];
  if(argc < 3)
  {
    strcpy (buffer, "Usage: EOF_Abuser obj_file_name src_file_name\n");
    write (2, buffer, strlen (buffer));
    exit(1);
  }

  int obj_fd, src_fc;
  if((obj_fd = open(argv[1], O_WRONLY, 0666)) < 0)
  {
    strcpy (buffer, "Error opening objective file.\n");
    write (2, buffer, strlen (buffer));
    exit (1);
  }
  if((src_fc = open(argv[2], O_RDONLY, 0666)) < 0)
  {
    strcpy (buffer, "Error opening source file.\n");
    write (2, buffer, strlen (buffer));
    exit (1);
  }

  //We go to the EOF of the objective
  lseek(obj_fd, 0, SEEK_END);
  while(read(src_fc, buffer, strlen(buffer)) > 0)
  {
    if(write(obj_fd, buffer, strlen(buffer)) < 0)
      strcpy (buffer, "Error in write.\n");
    else strcpy (buffer, "512b.\n");
    write (1, buffer, strlen (buffer));
  }
  strcpy (buffer, "Finished.\n");
  write (1, buffer, strlen (buffer));

  close(obj_fd); close(src_fc);
  exit (1);
}