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
|
#include <bus.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#define t(stmt) if (stmt) goto fail
static char msg[BUS_MEMORY_SIZE];
static int argc;
static char **argv;
static char arg[4098];
static void
start_daemons()
{
int i;
for (i = 1; i < argc; i++)
if (fork() == 0)
execl("./start-daemon", "./start-daemon", argv[i], NULL);
}
static int
callback(const char *message, void *user_data)
{
pid_t pid;
char *arg2;
char *arg3;
if (!message) {
pid = fork();
t(pid == -1);
if (pid == 0) {
if (fork() == 0) {
start_daemons();
}
exit(0);
} else {
(void) waitpid(pid, NULL, 0); /* Let's pretend everything will go swimmingly. */
}
return 1;
}
strncpy(msg, message, BUS_MEMORY_SIZE - 1);
msg[BUS_MEMORY_SIZE - 1] = 0;
pid = fork();
t(pid == -1);
if (pid == 0) {
if (fork() == 0) {
arg2 = strchr(msg, ' ');
if (arg2 == NULL)
exit(0);
arg3 = strchr(++arg2, ' ');
if (arg3 == NULL)
exit(0);
*arg3++ = 0;
if (!strcmp(arg2, "require")) {
execl("./start-daemon", "./start-daemon", arg3, NULL);
} else if (!strcmp(arg2, "awaiting-started")) {
execl("./test-daemon", "./test-daemon", arg3, "started", NULL);
} else if (!strcmp(arg2, "awaiting-ready") || !strcmp(arg2, "awaiting")) {
execl("./test-daemon", "./test-daemon", arg3, "ready", NULL);
} else if (!strcmp(arg2, "started")) {
sprintf(arg,
"grep '^%s\\$' < \"${XDG_RUNTIME_DIR}/started-daemons\" >/dev/null || "
"echo %s >> \"${XDG_RUNTIME_DIR}/started-daemons\"",
arg3, arg3);
execlp("sh", "sh", "-c", arg, NULL);
} else if (!strcmp(arg2, "ready")) {
sprintf(arg,
"grep '^%s\\$' < \"${XDG_RUNTIME_DIR}/ready-daemons\" >/dev/null || "
"echo %s >> \"${XDG_RUNTIME_DIR}/ready-daemons\"",
arg3, arg3);
execlp("sh", "sh", "-c", arg, NULL);
}
}
exit(0);
} else {
(void) waitpid(pid, NULL, 0); /* Let's pretend everything will go swimmingly. */
}
return 1;
(void) user_data;
fail:
perror("init");
return -1;
}
int
main(int argc_, char *argv_[])
{
char *bus_address = NULL;
bus_t bus;
argv = argv_;
argc = argc_;
if (argc < 2) {
fprintf(stderr, "USAGE: %s daemon...\n", *argv);
return 1;
}
t(setenv("XDG_RUNTIME_DIR", "./run", 1)); /* Real init systems with not have the period. */
system("mkdir -p -- \"${XDG_RUNTIME_DIR}\"");
system("truncate -s 0 -- \"${XDG_RUNTIME_DIR}/started-daemons\"");
system("truncate -s 0 -- \"${XDG_RUNTIME_DIR}/ready-daemons\"");
t(bus_create(NULL, 1, &bus_address));
fprintf(stderr, "\033[00;01;31mexport BUS_INIT=%s\033[00m\n", bus_address);
fprintf(stderr, "\033[00;31mexport XDG_RUNTIME_DIR=./run\033[00m\n");
t(setenv("BUS_INIT", bus_address, 1));
t(bus_open(&bus, bus_address, BUS_RDONLY));
t(bus_read(&bus, callback, NULL));
bus_close(&bus);
free(bus_address);
return 0;
fail:
perror("init");
bus_close(&bus);
free(bus_address);
return 1;
}
|
