memcheck/tests/linux/sigqueue.c

   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
  11 int 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   }
  25   si = calloc(1, sz);
  26   si->si_signo = SIGWINCH;
  27   si->si_code = SI_QUEUE;
  28   si->si_pid = getpid();
  29   si->si_uid = getuid();
  30   syscall(__NR_rt_sigqueueinfo, getpid(), SIGWINCH, si);
  31   free(si);
  32   fprintf(stderr, "Done.\n");
  33   return 0;
  34 }