int main(int argc, char const *argv[])
{
int listenfd, connfd;
pid_t childpid;
socklen_t clilen;
struct sockaddr_in cliaddr, servaddr;
struct sigaction act, oact;
act.sa_handler = sig_int;
act.sa_flags = SA_RESETHAND;
listenfd = socket(AF_INET, SOCK_STREAM, 0);
if (listenfd == -1)
handle_err("socket error");
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SERV_PORT);
if (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0 )
handle_err("binding error");
if (listen(listenfd, LISTEN_BACKLOG) == -1)
handle_err("listen error");
if (sigaction(SIGINT, &act, &oact) < 0) {
handle_err("sigaction error");
}
/* call accept, wait for a client */
for ( ; ; ) {
clilen = sizeof(cliaddr);
connfd = accept(listenfd, (struct sockaddr *) &cliaddr, &clilen);
if (connfd == -1)
handle_err("accept error");
if (shutdown(connfd, SHUT_RDWR) < 0)
handle_err("shutdown error");
if ((childpid = fork()) < 0)
handle_err("fork error");
else if (childpid == 0) { /* child process */
close(listenfd);
str_write(connfd); /* process the request */
exit(0);
}
close(connfd); /* parent closes connected socket */
}
exit(EXIT_SUCCESS);
}
void stop_do(int sockfd, int family)
{
struct sockaddr client_addr;
socklen_t len = (family == AF_INET) ? 16 : 28;
for ( ; ;)
{
int clientfd = Accept(sockfd, &client_addr, &len);
print_ip_addr(family, &client_addr, "remote client address:");
bzero(&client_addr, sizeof(client_addr));
pid_t child;
if ((child = fork()) < 0)
err_sys("fork error");
else if (child == 0) {
Close(sockfd);
str_write(clientfd);
exit(0);
}
Close(clientfd);
}
}
void str_repeat(const char *s, int outlen) {
printf("void str_repeat(const char *s, int outlen) {\n");
int len = strlen(s) * (1 + WIDTH);
outlen += outlen / WIDTH;
const char *ss = s;
char *buf = malloc(len);
int pos = 0;
while (pos < len) {
printf(" while (pos < len) {\n");
if (!*ss) {
printf(" if (!*ss) {\n");
ss = s;
}
buf[pos++] = *ss++;
if (pos >= len) {
printf(" if (pos >= len) {\n");
break;
}
if (pos % (WIDTH + 1) == WIDTH) {
printf(" if (pos %% (WIDTH + 1) == WIDTH) {\n");
buf[pos++] = '\n';
}
}
int fd = fileno(stdout);
int l = 0;
while (outlen > 0) {
printf(" while (outlen > 0) {\n");
l = outlen > len ? len : outlen;
wrap_write(fd, buf, l);
outlen -= len;
}
if (buf[l-1] != '\n') {
printf(" if (buf[l-1] != '\n') {\n");
str_write("\n");
}
free(buf);
}
