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 #include "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
  41         switch (state) {
  42         case STATE_EARLY:
  43                 LOG("- early -\n");
  44                 watchdog_init(0);
  45                 hotplug("/etc/hotplug.json");
  46                 procd_coldplug();
  47                 break;
  48
  49         case STATE_INIT:
  50                 // try to reopen incase the wdt was not available before coldplug
  51                 watchdog_init(0);
  52                 LOG("- init -\n");
  53                 log_init();
  54                 procd_connect_ubus();
  55                 service_init();
  56                 procd_inittab();
  57                 procd_inittab_run("respawn");
  58                 procd_inittab_run("askconsole");
  59                 procd_inittab_run("askfirst");
  60                 procd_inittab_run("sysinit");
  61                 break;
  62
  63         case STATE_RUNNING:
  64                 LOG("- init complete -\n");
  65                 break;
  66
  67         case STATE_SHUTDOWN:
  68                 LOG("- shutdown -\n");
  69                 procd_inittab_run("shutdown");
  70                 sync();
  71                 break;
  72
  73         case STATE_HALT:
  74                 LOG("- reboot -\n");
  75                 reboot(reboot_event);
  76                 break;
  77
  78         default:
  79                 ERROR("Unhandled state %d\n", state);
  80                 return;
  81         };
  82 }
  83
  84 void procd_state_next(void)
  85 {
  86         DEBUG(2, "Change state %d -> %d\n", state, state + 1);
  87         state++;
  88         state_enter();
  89 }
  90
  91 void procd_shutdown(int event)
  92 {
  93         DEBUG(1, "Shutting down system with event %x\n", event);
  94         reboot_event = event;
  95         state = STATE_SHUTDOWN;
  96         state_enter();
  97 }