state.c: pass ubus commandline is writable buffer to service_start_early()
[project/procd.git] / 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 }