unpv13e/server/serv01.c

/* include serv01 */
#include	"unp.h"

int
main(int argc, char **argv)
{
	int					listenfd, connfd;
	pid_t				childpid;
	void				sig_chld(int), sig_int(int), web_child(int);
	socklen_t			clilen, addrlen;
	struct sockaddr		*cliaddr;

	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: serv01 [ <host> ] <port#>");
	cliaddr = Malloc(addrlen);

	Signal(SIGCHLD, sig_chld);
	Signal(SIGINT, sig_int);

	for ( ; ; ) {
		clilen = addrlen;
		if ( (connfd = accept(listenfd, cliaddr, &clilen)) < 0) {
			if (errno == EINTR)
				continue;		/* back to for() */
			else
				err_sys("accept error");
		}

		if ( (childpid = Fork()) == 0) {	/* child process */
			Close(listenfd);	/* close listening socket */
			web_child(connfd);	/* process request */
			exit(0);
		}
		Close(connfd);			/* parent closes connected socket */
	}
}
/* end serv01 */

/* include sigint */
void
sig_int(int signo)
{
	void	pr_cpu_time(void);

	pr_cpu_time();
	exit(0);
}
/* end sigint */