int main(int argc, const char * argv[])
{
// handling zombie processes
signal(SIGCHLD, handleSIGCHLD);
srand(time(0));
init_client_list();
init_global_pipe_list();
init_message_boxes();
struct sockaddr_in my_addr;
struct sockaddr_in client_addr;
int port = 2000 + rand() % 100;
printf("Port : %d\n", port);
char port_str[5];
sprintf(port_str, "%d", port);
int sc_fd = passivesock(port_str, "tcp", 5);
printf("accepting.....\n");
int addrlen = sizeof(client_addr);
while(1) {
int new_client_sock = accept(sc_fd, (struct sockaddr *)&client_addr, (socklen_t*)&addrlen);
int pid = fork();
if(pid == 0) {
// child
client_node_t* client = create_client_node(new_client_sock, "CGILAB"/*inet_ntoa(client_addr.sin_addr)*/, 511/*ntohs(client_addr.sin_port)*/);
close(sc_fd);
if(insert_to_client_list(client) != -1) {
serve(client);
close(new_client_sock);
return 0;
}
} else {
close(new_client_sock);
}
}
return 0;
}
void
lgssd_run()
{
int ret;
struct sigaction dn_act;
int fd;
time_t child_check = 0;
pid_t child_pid;
/* Taken from linux/Documentation/dnotify.txt: */
dn_act.sa_sigaction = dir_notify_handler;
sigemptyset(&dn_act.sa_mask);
dn_act.sa_flags = SA_SIGINFO;
sigaction(DNOTIFY_SIGNAL, &dn_act, NULL);
if ((fd = open(pipefs_dir, O_RDONLY)) == -1) {
printerr(0, "ERROR: failed to open %s: %s\n",
pipefs_dir, strerror(errno));
return;
}
fcntl(fd, F_SETSIG, DNOTIFY_SIGNAL);
fcntl(fd, F_NOTIFY, DN_CREATE|DN_DELETE|DN_MODIFY|DN_MULTISHOT);
init_client_list();
while (1) {
while (dir_changed) {
dir_changed = 0;
printerr(2, "pipefs root dir changed\n");
if (update_client_list()) {
printerr(0, "ERROR: couldn't update "
"client list\n");
goto out;
}
}
/* every 5s cleanup possible zombies of child processes */
if (time(NULL) - child_check >= 5) {
printerr(3, "check zombie children...\n");
while (1) {
child_pid = waitpid(-1, NULL, WNOHANG);
if (child_pid <= 0)
break;
printerr(2, "terminate zombie child: %d\n",
child_pid);
}
child_check = time(NULL);
}
/* race condition here: dir_changed could be set before we
* enter the poll, and we'd never notice if it weren't for the
* timeout. */
ret = poll(pollarray, pollsize, POLL_MILLISECS);
if (ret < 0) {
if (errno != EINTR)
printerr(0,
"WARNING: error return from poll\n");
} else if (ret == 0) {
/* timeout */
} else { /* ret > 0 */
scan_poll_results(ret);
}
}
out:
close(fd);
return;
}