/* chatclient.c - a simple chat demo
 * (based on echoclient.c)
 */
#include "csapp.h"

void chat_receive(int connfd);
void chat_send(int connfd);

int main(int argc, char **argv) {
    int clientfd;
    int status;
    pid_t pid;
    char *host, *port, buf[MAXLINE];
    
    if (argc != 3) {
	fprintf(stderr, "usage: %s <host> <port>\n", argv[0]);
	exit(0);
    }
    host = argv[1];
    port = argv[2];
    clientfd = Open_clientfd(host, port);

    if (pid = Fork()){
      // -- parent --
      chat_send(clientfd); // loop: send user input to remote process
      // done when user types control-D (signaling end-of-file)
      kill(pid, SIGINT);  // ... so get rid of child process
      Close(clientfd);
      exit(0);
    }
    else {
      // -- child --
      chat_receive(clientfd);  // loop: receive lines, write to terminal
      // stopped by parent when user input ends.
    }
}