/**
* svc_runlevel - Change to a new runlevel
* @newlevel: New runlevel to activate
*
* Stops all services not in @newlevel and starts, or lets continue to run,
* those in @newlevel. Also updates @prevlevel and active @runlevel.
*/
void svc_runlevel (int newlevel)
{
svc_t *svc;
if (runlevel == newlevel)
return;
if (newlevel > 5 || newlevel < 1)
return;
prevlevel = runlevel;
runlevel = newlevel;
for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
int run = svc_enabled(svc, 0, NULL);
if (svc->pid) {
if (run == SVC_STOP)
svc_stop(svc);
} else {
if (run == SVC_START)
svc_start(svc);
}
}
if (runlevel == 1)
touch("/etc/nologin"); /* Disable login in single-user mode */
else
remove("/etc/nologin");
}
void svc_monitor(pid_t lost)
{
svc_t *svc;
if (was_stopped && !is_norespawn()) {
was_stopped = 0;
restart_any_lost_procs();
return;
}
if (fexist(SYNC_SHUTDOWN) || lost <= 1)
return;
/* Power user at the console, don't respawn tasks. */
if (is_norespawn()) {
was_stopped = 1;
return;
}
if (tty_respawn(lost))
return;
#ifndef INETD_DISABLED
if (inetd_respawn(lost))
return;
#endif
for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
if (lost != svc->pid)
continue;
if (SVC_CMD_SERVICE != svc->type) {
svc->pid = 0;
continue;
}
_d("Ouch, lost pid %d - %s(%d)", lost, basename(svc->cmd), svc->pid);
/* No longer running, update books. */
svc->pid = 0;
if (sig_stopped()) {
_e("Stopped, not respawning killed processes.");
break;
}
/* Cleanup any lingering or semi-restarting tasks before respawning */
_d("Sending SIGTERM to service group %s", basename(svc->cmd));
procname_kill(basename(svc->cmd), SIGTERM);
/* Restarting lost service. */
if (svc_enabled(svc, 0, NULL)) {
svc->restart_counter++;
svc_start(svc);
}
break;
}
}
int svc_start_by_name(char *name)
{
svc_t *svc = svc_find(name);
if (svc && svc_enabled(svc, 0, NULL))
return svc_start(svc);
return 1;
}
void svc_start_all(void)
{
svc_t *svc;
svc_cmd_t cmd;
for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
cmd = svc_enabled(svc, 0, NULL);
if (SVC_START == cmd || (SVC_RELOAD == cmd && svc->pid == 0))
svc_start(svc);
else if (SVC_RELOAD == cmd)
svc_reload(svc);
}
_d("Running svc up hooks ...");
plugin_run_hooks(HOOK_SVC_UP);
}
/**
* svc_bootstrap - Start bootstrap services and tasks
*
* System startup, runlevel S, where only services, tasks and
* run commands absolutely essential to bootstrap are located.
*/
void svc_bootstrap(void)
{
svc_t *svc;
_d("Bootstrapping all services in runlevel S from %s", FINIT_CONF);
for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
svc_cmd_t cmd;
/* Inetd services cannot be part of bootstrap currently. */
if (svc->type == SVC_CMD_INETD)
continue;
cmd = svc_enabled(svc, 0, NULL);
if (SVC_START == cmd || (SVC_RELOAD == cmd))
svc_start(svc);
}
}
void svc_monitor(void)
{
pid_t lost;
svc_t *svc;
lost = waitpid(-1, NULL, WNOHANG);
if (lost < 1)
return;
if (fexist(SYNC_SHUTDOWN) || lost <= 1)
return;
/* Power user at the console, don't respawn tasks. */
if (is_norespawn())
return;
for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
char *name = basename(svc->cmd);
if (lost != svc->pid)
continue;
_d("Ouch, lost pid %d - %s(%d)", lost, name, svc->pid);
/* No longer running, update books. */
svc->pid = 0;
if (sig_stopped()) {
_e("Stopped, not respawning killed processes.");
break;
}
/* Cleanup any lingering or semi-restarting tasks before respawning */
_d("Sending SIGTERM to service group %s", name);
procname_kill(name, SIGTERM);
/* Restarting lost service. */
if (svc_enabled(svc, 0, NULL)) {
svc->stat_restart_counter++;
svc_start(svc);
}
break;
}
}
/**
* svc_runlevel - Change to a new runlevel
* @newlevel: New runlevel to activate
*
* Stops all services not in @newlevel and starts, or lets continue to run,
* those in @newlevel. Also updates @prevlevel and active @runlevel.
*/
void svc_runlevel(int newlevel)
{
svc_t *svc;
if (runlevel == newlevel)
return;
if (newlevel < 0 || newlevel > 9)
return;
prevlevel = runlevel;
runlevel = newlevel;
utmp_save(prevlevel, newlevel);
_d("Setting new runlevel --> %d <-- previous %d", runlevel, prevlevel);
for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
svc_cmd_t cmd;
/* Inetd services have slightly different semantics */
#ifndef INETD_DISABLED
if (svc->type == SVC_CMD_INETD) {
if (!ISSET(svc->runlevels, runlevel))
inetd_stop(&svc->inetd);
else
inetd_start(&svc->inetd);
continue;
}
#endif
/* All other services consult their callback here */
cmd = svc_enabled(svc, 0, NULL);
if (svc->pid) {
if (cmd == SVC_STOP)
svc_stop(svc);
else if (cmd == SVC_RELOAD)
svc_reload(svc);
} else {
if (cmd == SVC_START)
svc_start(svc);
}
}
if (0 == runlevel) {
do_shutdown(SIGUSR2);
return;
}
if (6 == runlevel) {
do_shutdown(SIGUSR1);
return;
}
if (runlevel == 1)
touch("/etc/nologin"); /* Disable login in single-user mode */
else
erase("/etc/nologin");
if (0 != prevlevel)
tty_runlevel(runlevel);
}
