#include "unp.h" int main(int argc, char **argv) { int sockfd, n; struct sockaddr_in servaddr; char recvline[MAXLINE + 1]; if ( (sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0) err_sys("socket error"); bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = inet_addr(argv[1]); servaddr.sin_port = htons(13); /* daytime server */ if (connect_nonb(sockfd, (SA *) &servaddr, sizeof(servaddr), 0) < 0) err_sys("connect error"); for ( ; ; ) { if ( (n = read(sockfd, recvline, MAXLINE)) <= 0) { if (n == 0) break; /* server closed connection */ else err_sys("read error"); } recvline[n] = 0; /* null terminate */ Fputs(recvline, stdout); } exit(0); }