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Relocate source files to an src/ subdirectory
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
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/* Finit state machine
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*
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* Copyright (c) 2016 Jonas Johansson <jonas.johansson@westermo.se>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h" /* Generated by configure script */
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#include <sys/types.h>
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#include "finit.h"
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#include "cond.h"
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#include "conf.h"
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#include "helpers.h"
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#include "private.h"
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#include "service.h"
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#include "sig.h"
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#include "tty.h"
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#include "sm.h"
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sm_t sm;
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void sm_init(sm_t *sm)
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{
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sm->state = SM_BOOTSTRAP_STATE;
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sm->newlevel = -1;
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sm->reload = 0;
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sm->in_teardown = 0;
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}
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static char *sm_status(sm_t *sm)
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{
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switch (sm->state) {
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case SM_BOOTSTRAP_STATE:
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return "bootstrap";
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case SM_RUNNING_STATE:
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return "running";
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case SM_RUNLEVEL_CHANGE_STATE:
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return "runlevel/change";
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case SM_RUNLEVEL_WAIT_STATE:
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return "runlevel/wait";
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case SM_RELOAD_CHANGE_STATE:
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return "reload/change";
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case SM_RELOAD_WAIT_STATE:
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return "reload/wait";
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default:
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return "unknown";
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}
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}
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void sm_set_runlevel(sm_t *sm, int newlevel)
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{
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sm->newlevel = newlevel;
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}
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void sm_set_reload(sm_t *sm)
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{
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sm->reload = 1;
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}
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int sm_is_in_teardown(sm_t *sm)
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{
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return sm->in_teardown;
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}
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void sm_step(sm_t *sm)
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{
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sm_state_t old_state;
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restart:
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old_state = sm->state;
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_d("state: %s", sm_status(sm));
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switch (sm->state) {
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case SM_BOOTSTRAP_STATE:
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_d("Bootstrapping all services in runlevel S from %s", FINIT_CONF);
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service_step_all(SVC_TYPE_RUN | SVC_TYPE_TASK | SVC_TYPE_SERVICE);
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sm->state = SM_RUNNING_STATE;
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break;
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case SM_RUNNING_STATE:
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/* runlevel changed? */
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if (sm->newlevel >= 0 && sm->newlevel <= 9) {
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if (runlevel == sm->newlevel) {
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sm->newlevel = -1;
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break;
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}
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sm->state = SM_RUNLEVEL_CHANGE_STATE;
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break;
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}
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/* reload ? */
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if (sm->reload) {
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sm->reload = 0;
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sm->state = SM_RELOAD_CHANGE_STATE;
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}
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break;
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case SM_RUNLEVEL_CHANGE_STATE:
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prevlevel = runlevel;
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runlevel = sm->newlevel;
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sm->newlevel = -1;
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_d("Setting new runlevel --> %d <-- previous %d", runlevel, prevlevel);
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runlevel_set(prevlevel, runlevel);
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/* Disable login in single-user mode as well as shutdown/reboot */
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if (runlevel == 1 || runlevel == 0 || runlevel == 6)
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touch("/etc/nologin");
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else
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erase("/etc/nologin");
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/* Make sure to (re)load all *.conf in /etc/finit.d/ */
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conf_reload_dynamic();
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_d("Stopping services services not allowed in new runlevel ...");
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sm->in_teardown = 1;
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service_step_all(SVC_TYPE_ANY);
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sm->state = SM_RUNLEVEL_WAIT_STATE;
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break;
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case SM_RUNLEVEL_WAIT_STATE:
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/* Need to wait for any services to stop? If so, exit early
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* and perform second stage from service_monitor later. */
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if (!svc_stop_completed())
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break;
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/* Prev runlevel services stopped, call hooks before starting new runlevel ... */
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_d("All services have been stoppped, calling runlevel change hooks ...");
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plugin_run_hooks(HOOK_RUNLEVEL_CHANGE); /* Reconfigure HW/VLANs/etc here */
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_d("Starting services services new to this runlevel ...");
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sm->in_teardown = 0;
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service_step_all(SVC_TYPE_ANY);
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/* Cleanup stale services */
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svc_clean_dynamic(service_unregister);
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/*
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* "I've seen things you people wouldn't believe. Attack ships on fire off
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* the shoulder of Orion. I watched C-beams glitter in the dark near the
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* Tannhäuser Gate. All those .. moments .. will be lost in time, like
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* tears ... in ... rain."
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*/
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if (runlevel == 0 || runlevel == 6) {
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do_shutdown(halt);
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sm->state = SM_RUNNING_STATE;
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break;
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}
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/* No TTYs run at bootstrap, they have a delayed start. */
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if (prevlevel > 0)
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tty_runlevel(runlevel);
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sm->state = SM_RUNNING_STATE;
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break;
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case SM_RELOAD_CHANGE_STATE:
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/* First reload all *.conf in /etc/finit.d/ */
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conf_reload_dynamic();
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/* Then, mark all affected service conditions as in-flux and
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* let all affected services move to WAITING/HALTED */
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_d("Stopping services services not allowed after reconf ...");
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sm->in_teardown = 1;
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cond_reload();
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service_step_all(SVC_TYPE_SERVICE | SVC_TYPE_INETD);
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sm->state = SM_RELOAD_WAIT_STATE;
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break;
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case SM_RELOAD_WAIT_STATE:
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/* Need to wait for any services to stop? If so, exit early
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* and perform second stage from service_monitor later. */
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if (!svc_stop_completed())
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break;
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sm->in_teardown = 0;
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/* Cleanup stale services */
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svc_clean_dynamic(service_unregister);
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_d("Starting services after reconf ...");
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service_step_all(SVC_TYPE_SERVICE | SVC_TYPE_INETD);
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_d("Calling reconf hooks ...");
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plugin_run_hooks(HOOK_SVC_RECONF);
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service_step_all(SVC_TYPE_SERVICE | SVC_TYPE_INETD);
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_d("Reconfiguration done");
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sm->state = SM_RUNNING_STATE;
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break;
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}
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if (sm->state != old_state) {
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goto restart;
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}
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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