-
Notifications
You must be signed in to change notification settings - Fork 12
/
ws_deamon.cpp
90 lines (74 loc) · 1.47 KB
/
ws_deamon.cpp
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
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <stdarg.h>
#include <time.h>
#define NOFILE 2048
#define WAIT_TCP_TIMEOUT 30
int pid = 0;
void log_file(const char *fmt, ...){
char msg[2048] = {};
va_list argp;
va_start(argp, fmt);
vsprintf(msg + 1024, fmt, argp);
va_end(argp);
time_t tim = 0;
time(&tim);
tm *t = localtime(&tim);
sprintf(msg, "[%02d-%02d-%02d %02d:%02d:%02d] %s\n", t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec, msg + 1024);
FILE *fp = fopen("./log/deamon.log", "ab+");
if(fp == NULL){
exit(1);
}
fputs(msg, fp);
fflush(fp);
fclose(fp);
}
void kill_sub_process(int arg){
log_file("ws_sample killed");
kill(pid, SIGKILL);
exit(arg);
}
void init_daemon() {
int pid;
if ((pid = fork()) == -1)
exit(1);
if (pid != 0)
exit(0);
if (setsid() == -1)
exit(1);
if ((pid = fork()) == -1)
exit(1);
if (pid != 0)
exit(0);
for (int i = 0; i < NOFILE; i++)
close(i);
if (chdir("./") == -1)
exit(1);
if (umask(0) == -1)
exit(1);
signal(SIGTERM, kill_sub_process);
}
int main(){
init_daemon();
int ret = 0;
while(1){
if((pid = fork()) == -1){
exit(1);
}
if(pid != 0){
wait(&ret);
log_file("ws_sample %d exit status: %d", pid, ret);
sleep(WAIT_TCP_TIMEOUT);
}
else{
execl("./ws_sample", "ws_sample", NULL);
log_file("fail to exec sub program");
exit(1);
}
}
return 0;
}