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 "hotplug.h"
  22 #include "watchdog.h"
  23
  24 enum {
  25         STATE_NONE = 0,
  26         STATE_EARLY,
  27         STATE_INIT,
  28         STATE_RUNNING,
  29         STATE_SHUTDOWN,
  30         STATE_HALT,
  31         __STATE_MAX,
  32 };
  33
  34 static int state = STATE_NONE;
  35 static int reboot_event;
  36
  37 static void state_enter(void)
  38 {
  39
  40         switch (state) {
  41         case STATE_EARLY:
  42                 LOG("- early -\n");
  43                 watchdog_init();
  44                 hotplug("/etc/hotplug.json");
  45                 procd_coldplug();
  46                 break;
  47
  48         case STATE_INIT:
  49                 // check if the wdt appeared during coldplug
  50                 if (!watchdog_fd())
  51                         watchdog_init();
  52                 LOG("- init -\n");
  53                 log_init();
  54                 procd_connect_ubus();
  55                 procd_inittab();
  56                 procd_inittab_run("respawn");
  57                 procd_inittab_run("askconsole");
  58                 procd_inittab_run("askfirst");
  59                 procd_inittab_run("sysinit");
  60                 break;
  61
  62         case STATE_RUNNING:
  63                 LOG("- init complete -\n");
  64                 break;
  65
  66         case STATE_SHUTDOWN:
  67                 LOG("- shutdown -\n");
  68                 procd_inittab_run("shutdown");
  69                 sync();
  70                 break;
  71
  72         case STATE_HALT:
  73                 LOG("- reboot -\n");
  74                 reboot(reboot_event);
  75                 break;
  76
  77         default:
  78                 ERROR("Unhandled state %d\n", state);
  79                 return;
  80         };
  81 }
  82
  83 void procd_state_next(void)
  84 {
  85         DEBUG(2, "Change state %d -> %d\n", state, state + 1);
  86         state++;
  87         state_enter();
  88 }
  89
  90 void procd_shutdown(int event)
  91 {
  92         DEBUG(1, "Shutting down system with event %x\n", reboot_event);
  93         reboot_event = event;
  94         state = STATE_SHUTDOWN;
  95         state_enter();
  96 }