// gcc -o level6 -no-pie -fstack-protector level6.c
#include <stdio.h>
#include <unistd.h>

void win(void) {
  char *argv[2];
  argv[0] = "/bin/sh";
  argv[1] = NULL;
  execve(argv[0], argv, NULL);
}

int main(int argc, char **argv) {
  // Disable output buffering. Not part of the challenge.
  setvbuf(stdout, NULL, _IONBF, 0);
  setvbuf(stdin, NULL, _IONBF, 0);

  char buffer[64];
  while (1) {
    puts("What do you want to talk about?");
    read(0, buffer, 128);
    if (buffer[0] == '\0' || buffer[0] == '\n') break;

    printf("I can't talk about %s.\n", buffer);
  }
  puts("Bye.");
  return 0;
}