blob: 9656daff1ecce8c5e1c6b04f0f056a1fdb918b19 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* SPDX-License-Identifier: ISC */
#include "init.h"
static void respawn(svc_run_data_t *rt)
{
if (rt->svc->rspwn_limit > 0) {
rt->rspwn_count += 1;
if (rt->rspwn_count >= rt->svc->rspwn_limit)
goto fail;
}
rt->pid = runsvc(rt->svc);
if (rt->pid == -1)
goto fail;
rt->state = STATE_RUNNING;
return;
fail:
rt->state = STATE_FAILED;
print_status(rt);
return;
}
static svc_run_data_t *wait_for_process(void)
{
svc_run_data_t *rt;
int status;
pid_t pid;
do {
pid = wait(&status);
if (pid == -1) {
if (errno == EINTR)
return NULL;
if (errno == ECHILD)
exit(EXIT_FAILURE);
}
rt = config_rt_data_by_pid(pid);
} while (rt == NULL);
rt->status = WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE;
rt->pid = -1;
if (rt->svc->type == SVC_RESPAWN) {
if (config_should_respawn())
respawn(rt);
} else {
if (rt->status == EXIT_SUCCESS) {
rt->state = STATE_COMPLETED;
} else {
rt->state = STATE_FAILED;
}
print_status(rt);
if (rt->svc->type == SVC_ONCE)
config_singleshot_terminated();
}
return rt;
}
static void handle_signal(int signo)
{
switch (signo) {
case SIGTERM:
config_set_target(TGT_SHUTDOWN);
break;
case SIGINT:
config_set_target(TGT_REBOOT);
break;
case SIGHUP:
break;
case SIGUSR1:
break;
}
}
static void check_target_completion(void)
{
if (!config_is_current_target_complete())
return;
switch (config_get_current_target()) {
case TGT_BOOT:
break;
case TGT_SHUTDOWN:
for (;;)
reboot(RB_POWER_OFF);
break;
case TGT_REBOOT:
for (;;)
reboot(RB_AUTOBOOT);
break;
}
}
int main(void)
{
svc_run_data_t *rt, *terminated;
struct sigaction act;
if (config_load())
return EXIT_FAILURE;
memset(&act, 0, sizeof(act));
act.sa_handler = handle_signal;
sigaction(SIGTERM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGUSR1, &act, NULL);
if (reboot(LINUX_REBOOT_CMD_CAD_OFF))
perror("cannot disable CTRL+ALT+DEL");
for (;;) {
rt = config_dequeue();
if (rt == NULL) {
terminated = wait_for_process();
if (terminated == NULL)
continue;
} else if (rt->svc->flags & SVC_FLAG_HAS_EXEC) {
rt->pid = runsvc(rt->svc);
if (rt->pid == -1) {
rt->state = STATE_FAILED;
print_status(rt);
} else {
rt->state = STATE_RUNNING;
print_status(rt);
switch (rt->svc->type) {
case SVC_WAIT:
do {
terminated = wait_for_process();
} while (terminated != rt);
break;
case SVC_ONCE:
config_singleshot_started();
break;
}
}
} else {
rt->status = EXIT_SUCCESS;
rt->state = STATE_COMPLETED;
print_status(rt);
}
check_target_completion();
}
return EXIT_SUCCESS;
}
|
