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
|
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
const char *
strsigcode(int code)
{
switch (code) {
case SI_USER:
return "SIG_USER";
case SI_KERNEL:
return "SIG_KERNEL";
case SI_QUEUE:
return "SIG_QUEUE";
case SI_TIMER:
return "SIG_TIMER";
case SI_MESGQ:
return "SIG_MESGQ";
case SI_ASYNCIO:
return "SIG_ASYNCIO";
case SI_SIGIO:
return "SIG_SIGIO";
case SI_TKILL:
return "SIG_TKILL";
default:
return "???";
}
}
void
handler(int signo, siginfo_t *info, void *frame)
{
(void) signo;
(void) frame;
fprintf(stderr, ".si_signo: %i (%s)\n", info->si_signo, strsignal(info->si_signo));
fprintf(stderr, ".si_code: %i (%s)\n", info->si_code, strsigcode(info->si_code));
fprintf(stderr, ".si_errno: %i\n", info->si_errno);
if (info->si_code == SI_USER || info->si_code == SI_TKILL || info->si_code == SI_QUEUE) {
fprintf(stderr, ".si_pid: %ju\n", info->si_pid);
fprintf(stderr, ".si_uid: %ju\n", info->si_uid);
if (info->si_code == SI_QUEUE) {
fprintf(stderr, ".si_value.sival_int: %i\n", info->si_value.sival_int);
fprintf(stderr, ".si_value.sival_ptr: %p\n", info->si_value.sival_ptr);
}
}
_exit(1);
}
int
main(void)
{
static union sigval value;
static struct sigaction sa;
sa.sa_sigaction = handler;
sa.sa_flags = SA_SIGINFO;
sigaction(SIGRTMAX, &sa, 0);
value.sival_int = 1444;
sigqueue(getpid(), SIGRTMAX, value);
pause();
return 0;
}
|
