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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* SPDX-License-Identifier: ISC */
#include "init.h"
static void print_status(svc_run_data_t *rt)
{
const char *str;
char pre = '\n';
switch (rt->state) {
case STATE_RUNNING:
if (rt->svc->type == SVC_WAIT) {
str = "\033[22;33m .. \033[0m";
} else {
str = "\033[22;32m UP \033[0m";
}
break;
case STATE_COMPLETED:
if (rt->svc->type == SVC_WAIT)
pre = '\r';
str = "\033[22;32mDONE\033[0m";
break;
case STATE_FAILED:
if (rt->svc->type == SVC_WAIT)
pre = '\r';
str = "\033[22;31mFAIL\033[0m";
break;
default:
return;
}
printf("%c[%s] %s", pre, str, rt->svc->desc);
fflush(stdout);
}
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;
}
|
