#include	"unp.h"#include	<time.h>intmain(int argc, char **argv){	int				listenfd, connfd;	socklen_t		addrlen, len;	struct sockaddr	*cliaddr;	char			buff[MAXLINE];	time_t			ticks;	daemon_init(argv[0], 0);	if (argc == 2)		listenfd = Tcp_listen(NULL, argv[1], &addrlen);	else if (argc == 3)		listenfd = Tcp_listen(argv[1], argv[2], &addrlen);	else		err_quit("usage: daytimetcpsrv2 [ <host> ] <service or port>");	cliaddr = Malloc(addrlen);	for ( ; ; ) {		len = addrlen;		connfd = Accept(listenfd, cliaddr, &len);		err_msg("connection from %s", Sock_ntop(cliaddr, len));        ticks = time(NULL);        snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));        Write(connfd, buff, strlen(buff));		Close(connfd);	}}