int try_open_new_listening_sockets (struct mc_config *MC) {
int i, j, sfd;
for (i = 0; i < MC->clusters_num; i++) {
if (MC->Clusters[i].other_cluster_no >= 0) {
continue;
}
sfd = server_socket (MC->Clusters[i].port, settings_addr, backlog, 0);
if (sfd >= MAX_CONNECTIONS) {
vkprintf (0, "cannot open server socket at port %d: too many open connections (fd=%d)\n", MC->Clusters[i].port, sfd);
close (sfd);
sfd = -1;
}
if (sfd < 0) {
vkprintf (0, "cannot open server socket at port %d: %m\n", MC->Clusters[i].port);
for (j = 0; j < i; j++) {
if (MC->Clusters[j].other_cluster_no < 0) {
sfd = MC->Clusters[j].server_socket;
close (sfd);
MC->Clusters[j].server_socket = -1;
vkprintf (1, "closed newly-opened listening socket at %s:%d, fd=%d\n", conv_addr (settings_addr.s_addr, 0), MC->Clusters[j].port, sfd);
}
}
return -2;
}
vkprintf (1, "created listening socket at %s:%d, fd=%d\n", conv_addr (settings_addr.s_addr, 0), MC->Clusters[i].port, sfd);
MC->Clusters[i].server_socket = sfd;
}
return 0;
}
void start_server (void) {
char buf[64];
int i, prev_time = 0;
init_epoll ();
init_netbuffers ();
if (!sfd) {
sfd = server_socket (port, settings_addr, backlog, 0);
}
if (sfd < 0) {
kprintf ("cannot open server socket at port %d: %m\n", port);
exit (3);
}
vkprintf (1, "created listening socket at %s:%d, fd=%d\n", conv_addr (settings_addr.s_addr, buf), port, sfd);
if (daemonize) {
setsid ();
}
if (change_user (username) < 0) {
kprintf ("fatal: cannot change user to %s\n", username ? username : "******");
exit (1);
}
if (binlogname && !binlog_disabled) {
assert (append_to_binlog (Binlog) == log_readto_pos);
}
init_listening_connection (sfd, &ct_rpc_server, ©exec_result_rpc_server);
sigset_t signal_set;
sigemptyset (&signal_set);
sigaddset (&signal_set, SIGINT);
sigaddset (&signal_set, SIGTERM);
sigaddset (&signal_set, SIGUSR1);
if (daemonize) {
sigaddset (&signal_set, SIGHUP);
}
struct sigaction act;
act.sa_handler = copyexec_results_sig_handler;
act.sa_mask = signal_set;
act.sa_flags = 0;
for (i = 1; i <= SIGRTMAX; i++) {
if (sigismember (&signal_set, i)) {
if (sigaction (i, &act, NULL) < 0) {
kprintf ("sigaction (%d) failed. %m\n", i);
exit (1);
}
}
}
for (i = 0; ; i++) {
if (!(i & 255)) {
vkprintf (1, "epoll_work(): %d out of %d connections, network buffers: %d used, %d out of %d allocated\n",
active_connections, maxconn, NB_used, NB_alloc, NB_max);
}
epoll_work (71);
if (interrupted_by_term_signal ()) {
break;
}
if (pending_signals & (1LL << SIGHUP)) {
pending_signals_clear_bit (&signal_set, SIGHUP);
kprintf ("got SIGHUP.\n");
sync_binlog (2);
}
if (pending_signals & (1LL << SIGUSR1)) {
pending_signals_clear_bit (&signal_set, SIGUSR1);
kprintf ("got SIGUSR1, rotate logs.\n");
reopen_logs ();
sync_binlog (2);
}
if (now != prev_time) {
prev_time = now;
cron ();
}
if (quit_steps && !--quit_steps) break;
}
epoll_close (sfd);
close (sfd);
flush_binlog_last ();
sync_binlog (2);
}
