/* Client - Server database system
 * 8th Semester , Computational Systems Laboratory
 * Ioannou Spiros
 * Kontopodis Dimitris
 * May '97
 */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>


void sigphdl ();


main (int argc, char *argv[])
{
  int siz, j, sd, insd,r, i, b, reqok;
  char buf[80];
  char buf1[80];
  char buf2[80];
  char me[80];
  char *b1;
  char *req, **tp, *arg1, *arg2;
  long offset;
  int value, cs;
  int i1, i2;


  char c;
  struct sockaddr_in sa, client_new,
    la;
  int len;
  char host[63];
  struct hostent *hostp, *myhost;
  struct timeval tval;
  fd_set input_fds;



  if (argc != 3) {
	printf ("Usage: client [host] [port]\n");
	exit (-1);
  }

  /*Client operation socket */
  if ((sd = socket (AF_INET, SOCK_STREAM, 0)) < 0) {
	perror ("socket");
	exit (1);
  }

/* Do Client Initialization stuff */
  hostp = gethostbyname (argv[1]);
  if (!hostp) {
	perror ("gethostbyname");
	exit (-2);
  }
  else
	printf ("Official hostname:%s\n", hostp->h_name);

  bcopy ((char *) hostp->h_addr, (char *) &sa.sin_addr, hostp->h_length);
  sa.sin_family = AF_INET;
  sa.sin_port = htons ((u_short) atoi (argv[2]));
/*  sa.sin_addr.s_addr=htonl((u_long)hostp->h_addr); */

  if (connect (sd, (struct sockaddr *) &sa, sizeof (sa)) < 0)
	perror ("connect");
  fflush (stdout);

  /*timeout not used, just for testing*/
  tval.tv_sec = 0;
  tval.tv_usec = 10;

  /*fcntl(sd,F_SETFL,O_NDELAY);*/

  for (;;) {
	reqok = 0;
	FD_ZERO (&input_fds);	        /* Initialization of flags*/
	FD_SET (0, &input_fds);         /* Input from stdin=keyboard*/
	FD_SET (sd, &input_fds);	/* Input from Coordinator */

	/* Scan for input without timeout -> interupt driven*/
	if ((i=select(64,&input_fds,(fd_set *)0,(fd_set *)0,
					      (struct timeval *)0)) < 0) {
	  perror ("global select");
	  exit (5);
	}
	/* Not really used without the -DNONET option of server compiling*/
	if (FD_ISSET (sd, &input_fds)) {
	  b = read (sd, buf, 80);
	  if (b <= 0) {
		printf ("Connection closed by foreign host\n");
		exit (b);
	  }
	  if (b < 2) {
		if (isprint (buf[0]))
		  printf ("\nByte requested is \"%d\"(%c)", buf[0], buf[0]);
		else
		  printf ("\nByte requested is \"%d\"", buf[0]);
	  }
	  else {
		write (1, buf, b);
	  }
	  printf ("\nClient Ready >");
	}
	/*Keyboard input!*/
	if (FD_ISSET (0, &input_fds)) {
	  r =read (0, buf, 80);
	  b = write (sd, buf, r);
	}
  }
}


void 
sigphdl ()
{
  printf ("\nBROKEN PIPE\n");
  signal (SIGPIPE, sigphdl);

}

/* 
 * Counts arguments. Used for 
 * parsing user input 
 */
countspace (char *str)
{
  int c = 0, i = 0, p;
  while (str[i] && str[i] == ' ')
	i++;

  if (str[i])
	do {
	  if (str[i] == ' ' && str[i + 1] != ' ')
		c++;
	  i++;
	} while (str[i + 1]);
  return c;
}

/* The end */