/* configuration-dependent initialization */
int main_configure(char *arg1, char *arg2) {
if(options_cmdline(arg1, arg2))
return 1;
options_apply();
str_canary_init(); /* needs prng initialization from options_cmdline */
#if !defined(USE_WIN32) && !defined(__vms)
/* syslog_open() must be called before change_root()
* to be able to access /dev/log socket */
syslog_open();
#endif /* !defined(USE_WIN32) && !defined(__vms) */
if(bind_ports())
return 1;
#ifdef HAVE_CHROOT
/* change_root() must be called before drop_privileges()
* since chroot() needs root privileges */
if(change_root())
return 1;
#endif /* HAVE_CHROOT */
if(drop_privileges(1))
return 1;
/* log_open() must be be called after drop_privileges()
* or logfile rotation won't be possible */
/* log_open() must be be called before daemonize()
* since daemonize() invalidates stderr */
if(log_open())
return 1;
#ifndef USE_FORK
num_clients=0; /* the first valid config */
#endif
return 0;
}
/* configuration-dependent initialization */
int main_configure(char *arg1, char *arg2) {
if(parse_commandline(arg1, arg2))
return 1;
str_canary_init(); /* needs prng initialization from parse_commandline */
#if !defined(USE_WIN32) && !defined(__vms)
/* syslog_open() must be called before change_root()
* to be able to access /dev/log socket */
syslog_open();
#endif /* !defined(USE_WIN32) && !defined(__vms) */
if(bind_ports())
return 1;
#ifdef HAVE_CHROOT
/* change_root() must be called before drop_privileges()
* since chroot() needs root privileges */
if(change_root())
return 1;
#endif /* HAVE_CHROOT */
#if !defined(USE_WIN32) && !defined(__vms) && !defined(USE_OS2)
if(drop_privileges(1))
return 1;
#endif /* standard Unix */
/* log_open() must be be called after drop_privileges()
* or logfile rotation won't be possible */
/* log_open() must be be called before daemonize()
* since daemonize() invalidates stderr */
log_open();
return 0;
}
static int signal_pipe_dispatch(void) {
int sig, err;
s_log(LOG_DEBUG, "Dispatching signals from the signal pipe");
while(readsocket(signal_pipe[0], (char *)&sig, sizeof sig)==sizeof sig) {
switch(sig) {
#ifndef USE_WIN32
case SIGCHLD:
s_log(LOG_DEBUG, "Processing SIGCHLD");
#ifdef USE_FORK
client_status(); /* report status of client process */
#else /* USE_UCONTEXT || USE_PTHREAD */
child_status(); /* report status of libwrap or 'exec' process */
#endif /* defined USE_FORK */
break;
#endif /* !defind USE_WIN32 */
case SIGNAL_RELOAD_CONFIG:
s_log(LOG_DEBUG, "Processing SIGNAL_RELOAD_CONFIG");
err=parse_conf(NULL, CONF_RELOAD);
if(err) {
s_log(LOG_ERR, "Failed to reload the configuration file");
} else {
unbind_ports();
log_close();
apply_conf();
log_open();
if(bind_ports()) {
/* FIXME: handle the error */
}
}
break;
case SIGNAL_REOPEN_LOG:
s_log(LOG_DEBUG, "Processing SIGNAL_REOPEN_LOG");
log_close();
log_open();
s_log(LOG_NOTICE, "Log file reopened");
break;
case SIGNAL_TERMINATE:
s_log(LOG_DEBUG, "Processing SIGNAL_TERMINATE");
s_log(LOG_NOTICE, "Terminated");
return 2;
default:
s_log(LOG_ERR, "Received signal %d; terminating", sig);
return 1;
}
}
s_log(LOG_DEBUG, "Signal pipe is empty");
return 0;
}
NOEXPORT int signal_pipe_dispatch(void) {
static int sig;
static size_t ptr=0;
ssize_t num;
char *sig_name;
s_log(LOG_DEBUG, "Dispatching signals from the signal pipe");
for(;;) {
num=readsocket(signal_pipe[0], (char *)&sig+ptr, sizeof sig-ptr);
if(num==-1 && get_last_socket_error()==S_EWOULDBLOCK) {
s_log(LOG_DEBUG, "Signal pipe is empty");
return 0;
}
if(num==-1 || num==0) {
if(num)
sockerror("signal pipe read");
else
s_log(LOG_ERR, "Signal pipe closed");
s_poll_remove(fds, signal_pipe[0]);
closesocket(signal_pipe[0]);
closesocket(signal_pipe[1]);
if(signal_pipe_init()) {
s_log(LOG_ERR,
"Signal pipe reinitialization failed; terminating");
return 1;
}
s_poll_add(fds, signal_pipe[0], 1, 0);
s_log(LOG_ERR, "Signal pipe reinitialized");
return 0;
}
ptr+=(size_t)num;
if(ptr<sizeof sig) {
s_log(LOG_DEBUG, "Incomplete signal pipe read (ptr=%ld)",
(long)ptr);
return 0;
}
ptr=0;
switch(sig) {
#ifndef USE_WIN32
case SIGCHLD:
s_log(LOG_DEBUG, "Processing SIGCHLD");
#ifdef USE_FORK
client_status(); /* report status of client process */
#else /* USE_UCONTEXT || USE_PTHREAD */
child_status(); /* report status of libwrap or 'exec' process */
#endif /* defined USE_FORK */
break;
#endif /* !defind USE_WIN32 */
case SIGNAL_RELOAD_CONFIG:
s_log(LOG_DEBUG, "Processing SIGNAL_RELOAD_CONFIG");
if(options_parse(CONF_RELOAD)) {
s_log(LOG_ERR, "Failed to reload the configuration file");
} else {
unbind_ports();
log_close();
options_apply();
log_open();
ui_config_reloaded();
if(bind_ports()) {
/* FIXME: handle the error */
}
}
break;
case SIGNAL_REOPEN_LOG:
s_log(LOG_DEBUG, "Processing SIGNAL_REOPEN_LOG");
log_close();
log_open();
s_log(LOG_NOTICE, "Log file reopened");
break;
case SIGNAL_TERMINATE:
s_log(LOG_DEBUG, "Processing SIGNAL_TERMINATE");
s_log(LOG_NOTICE, "Terminated");
return 1;
default:
sig_name=signal_name(sig);
s_log(LOG_ERR, "Received %s; terminating", sig_name);
str_free(sig_name);
return 1;
}
}
}
