state.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <sys/reboot.h>
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18
  19 #include "procd.h"
  20 #include "syslog.h"
  21 #include "plug/hotplug.h"
  22 #include "watchdog.h"
  23 #include "service/service.h"
  24
  25 enum {
  26         STATE_NONE = 0,
  27         STATE_EARLY,
  28         STATE_INIT,
  29         STATE_RUNNING,
  30         STATE_SHUTDOWN,
  31         STATE_HALT,
  32         __STATE_MAX,
  33 };
  34
  35 static int state = STATE_NONE;
  36 static int reboot_event;
  37
  38 static void state_enter(void)
  39 {
  40         char ubus_cmd[] = "/sbin/ubusd";
  41
  42         switch (state) {
  43         case STATE_EARLY:
  44                 LOG("- early -\n");
  45                 watchdog_init(0);
  46                 hotplug("/etc/hotplug.json");
  47                 procd_coldplug();
  48                 break;
  49
  50         case STATE_INIT:
  51                 // try to reopen incase the wdt was not available before coldplug
  52                 watchdog_init(0);
  53                 LOG("- ubus -\n");
  54                 procd_connect_ubus();
  55
  56                 LOG("- init -\n");
  57                 service_init();
  58                 service_start_early("ubus", ubus_cmd);
  59
  60                 procd_inittab();
  61                 procd_inittab_run("respawn");
  62                 procd_inittab_run("askconsole");
  63                 procd_inittab_run("askfirst");
  64                 procd_inittab_run("sysinit");
  65                 break;
  66
  67         case STATE_RUNNING:
  68                 LOG("- init complete -\n");
  69                 break;
  70
  71         case STATE_SHUTDOWN:
  72                 LOG("- shutdown -\n");
  73                 procd_inittab_run("shutdown");
  74                 sync();
  75                 break;
  76
  77         case STATE_HALT:
  78                 LOG("- reboot -\n");
  79                 reboot(reboot_event);
  80                 break;
  81
  82         default:
  83                 ERROR("Unhandled state %d\n", state);
  84                 return;
  85         };
  86 }
  87
  88 void procd_state_next(void)
  89 {
  90         DEBUG(4, "Change state %d -> %d\n", state, state + 1);
  91         state++;
  92         state_enter();
  93 }
  94
  95 void procd_shutdown(int event)
  96 {
  97         DEBUG(2, "Shutting down system with event %x\n", event);
  98         reboot_event = event;
  99         state = STATE_SHUTDOWN;
 100         state_enter();
 101 }