#include	"calld.h"static voidclient_alloc(void)		/* alloc more entries in the client[] array */{	int		i;	if (client == NULL)		client = malloc(NALLOC * sizeof(Client));	else		client = realloc(client,		  (client_size + NALLOC) * sizeof(Client));	if (client == NULL)		err_sys("can't alloc for client array");	/*	 * Have to initialize the new entries.	 */	for (i = client_size; i < client_size + NALLOC; i++)		client[i].fd = -1;	/* fd of -1 means entry available */	client_size += NALLOC;}/* * Called by loop() when connection request from a new client arrives. */intclient_add(int fd, uid_t uid){	int		i;	if (client == NULL)		/* first time we're called */		client_alloc();again:	for (i = 0; i < client_size; i++) {		if (client[i].fd == -1) {	/* find an available entry */			client[i].fd = fd;			client[i].uid = uid;			return(i);	/* return index in client[] array */		}	}	/*	 * Client array full, time to realloc for more.	 */	client_alloc();	goto again;		/* and search again (will work this time) */}/* * Called by loop() when we're done with a client. */voidclient_del(int fd){	int		i;	for (i = 0; i < client_size; i++) {		if (client[i].fd == fd) {			client[i].fd = -1;			return;		}	}	log_quit("can't find client entry for fd %d", fd);}/* * Find the client entry corresponding to a process ID. * This function is called by the sig_chld() signal * handler only after a child has terminated. */voidclient_sigchld(pid_t pid, int stat){	int		i;	for (i = 0; i < client_size; i++) {		if (client[i].pid == pid) {			client[i].childdone = stat;	/* child's exit() status +1 */			return;		}	}	log_quit("can't find client entry for pid %d", pid);}