#include "unp.h"

int main(int argc, char ** argv)
{
    int     sockfd, n;
    char    recvline[MAXLINE + 1];
    struct  sockaddr_in servaddr;

    if(argc != 2)
        err_quit("usage: a.out <IPaddress>");

    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
        err_sys("socket error");
    
    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(10013); // daytime server 
    if(inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
        err_quit("inet_pton error for %s", argv[1]);
    
    if(connect(sockfd, (SA *)&servaddr, sizeof(servaddr)) < 0)
        err_sys("connect error");

    while((n = read(sockfd, recvline, MAXLINE)) > 0) {
        recvline[n] = 0; // null terminate
        if(fputs(recvline, stdout) == EOF)
            err_sys("fputs error");
    }
    if(n < 0)
        err_sys("read error");
    exit(0);
    
}