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
|
#include "core.hpp"
#include <sys/wait.h>
#include <unistd.h>
#include <csignal>
#include <cstdio>
#include <cstdlib>
#include "mt_rand.hpp"
#include "nullpo.hpp"
#include "socket.hpp"
#include "timer.hpp"
#include "version.hpp"
// Added by Gabuzomeu
//
// This is an implementation of signal() using sigaction() for portability.
// (sigaction() is POSIX; signal() is not.) Taken from Stevens' _Advanced
// Programming in the UNIX Environment_.
//
typedef void(*sigfunc)(int);
static
sigfunc compat_signal(int signo, sigfunc func)
{
struct sigaction sact, oact;
sact.sa_handler = func;
sigfillset(&sact.sa_mask);
sigdelset(&sact.sa_mask, SIGSEGV);
sigdelset(&sact.sa_mask, SIGBUS);
sigdelset(&sact.sa_mask, SIGTRAP);
sigdelset(&sact.sa_mask, SIGILL);
sigdelset(&sact.sa_mask, SIGFPE);
sact.sa_flags = 0;
if (sigaction(signo, &sact, &oact) < 0)
return SIG_ERR;
return oact.sa_handler;
}
static
void chld_proc(int)
{
wait(NULL);
}
static
void sig_proc(int)
{
for (int i = 1; i < 31; ++i)
compat_signal(i, SIG_IGN);
term_func();
_exit(0);
}
bool runflag = true;
/*
Note about fatal signals:
Under certain circumstances,
the following signals MUST not be ignored:
SIGFPE, SIGSEGV, SIGILL
Unless you use SA_SIGINFO and *carefully* check the origin,
that means they must be SIG_DFL.
*/
int main(int argc, char **argv)
{
/// Note that getpid() and getppid() may be very close
mt_seed(time(NULL) ^ (getpid() << 16) ^ (getppid() << 8));
do_socket();
do_init(argc, argv);
// set up exit handlers *after* the initialization has happened.
// This is because term_func is likely to depend on successful init.
compat_signal(SIGPIPE, SIG_IGN);
compat_signal(SIGTERM, sig_proc);
compat_signal(SIGINT, sig_proc);
compat_signal(SIGCHLD, chld_proc);
// Signal to create coredumps by system when necessary (crash)
compat_signal(SIGSEGV, SIG_DFL);
compat_signal(SIGBUS, SIG_DFL);
compat_signal(SIGTRAP, SIG_DFL);
compat_signal(SIGILL, SIG_DFL);
compat_signal(SIGFPE, SIG_DFL);
atexit(term_func);
while (runflag)
{
do_sendrecv(do_timer(gettick_nocache()));
do_parsepacket();
}
}
|
