#include	"opend.h"#include	<poll.h>#if !defined(BSD) && !defined(MACOS)#include	<stropts.h>#endifvoidloop(void){	int				i, maxi, listenfd, clifd, nread;	char			buf[MAXLINE];	uid_t			uid;	struct pollfd	*pollfd;	if ((pollfd = malloc(open_max() * sizeof(struct pollfd))) == NULL)		err_sys("malloc error");	/* obtain fd to listen for client requests on */	if ((listenfd = serv_listen(CS_OPEN)) < 0)		log_sys("serv_listen error");	client_add(listenfd, 0);	/* we use [0] for listenfd */	pollfd[0].fd = listenfd;	pollfd[0].events = POLLIN;	maxi = 0;	for ( ; ; ) {		if (poll(pollfd, maxi + 1, -1) < 0)			log_sys("poll error");		if (pollfd[0].revents & POLLIN) {			/* accept new client request */			if ((clifd = serv_accept(listenfd, &uid)) < 0)				log_sys("serv_accept error: %d", clifd);			i = client_add(clifd, uid);			pollfd[i].fd = clifd;			pollfd[i].events = POLLIN;			if (i > maxi)				maxi = i;			log_msg("new connection: uid %d, fd %d", uid, clifd);		}		for (i = 1; i <= maxi; i++) {			if ((clifd = client[i].fd) < 0)				continue;			if (pollfd[i].revents & POLLHUP) {				goto hungup;			} else if (pollfd[i].revents & POLLIN) {				/* read argument buffer from client */				if ((nread = read(clifd, buf, MAXLINE)) < 0) {					log_sys("read error on fd %d", clifd);				} else if (nread == 0) {hungup:					log_msg("closed: uid %d, fd %d",					  client[i].uid, clifd);					client_del(clifd);	/* client has closed conn */					pollfd[i].fd = -1;					close(clifd);				} else {		/* process client's request */					request(buf, nread, clifd, client[i].uid);				}			}		}	}}