1/* Test program that invokes the Linux system call rt_sigqueueinfo(). */
2
3#include <signal.h>
4#include <string.h>
5#include <stddef.h>
6#include <stdlib.h>
7#include <stdio.h>
8#include <syscall.h>
9#include <unistd.h>
10
11int main(int argc, char **argv)
12{
13  siginfo_t *si;
14  const size_t sz = sizeof(*si);
15
16  if (argc == 1) {
17    fprintf(stderr, "sizeof(*si) = %zu\n", sz);
18    fprintf(stdout, "offsetof(siginfo_t, si_signo)  = %zd\n",
19            offsetof(siginfo_t, si_signo));
20    fprintf(stdout, "offsetof(siginfo_t, si_errno)  = %zd\n",
21            offsetof(siginfo_t, si_errno));
22    fprintf(stdout, "offsetof(siginfo_t, si_code)   = %zd\n",
23            offsetof(siginfo_t, si_code));
24    fprintf(stdout, "offsetof(siginfo_t, _sifields) = %zd\n",
25            offsetof(siginfo_t, _sifields));
26  }
27  si = calloc(1, sz);
28  si->si_signo = SIGWINCH;
29  si->si_code = SI_QUEUE;
30  si->si_pid = getpid();
31  si->si_uid = getuid();
32  syscall(__NR_rt_sigqueueinfo, getpid(), SIGWINCH, si);
33  free(si);
34  fprintf(stderr, "Done.\n");
35  return 0;
36}
37