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/* Test program that invokes the Linux system call rt_sigqueueinfo(). */
#include <signal.h>
#include <string.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <syscall.h>
#include <unistd.h>
int main(int argc, char **argv)
{
siginfo_t *si;
const size_t sz = sizeof(*si);
if (argc == 1) {
fprintf(stderr, "sizeof(*si) = %zu\n", sz);
fprintf(stdout, "offsetof(siginfo_t, si_signo) = %zd\n",
offsetof(siginfo_t, si_signo));
fprintf(stdout, "offsetof(siginfo_t, si_errno) = %zd\n",
offsetof(siginfo_t, si_errno));
fprintf(stdout, "offsetof(siginfo_t, si_code) = %zd\n",
offsetof(siginfo_t, si_code));
fprintf(stdout, "offsetof(siginfo_t, _sifields) = %zd\n",
offsetof(siginfo_t, _sifields));
}
si = calloc(1, sz);
si->si_signo = SIGWINCH;
si->si_code = SI_QUEUE;
si->si_pid = getpid();
si->si_uid = getuid();
syscall(__NR_rt_sigqueueinfo, getpid(), SIGWINCH, si);
free(si);
fprintf(stderr, "Done.\n");
return 0;
}
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