tools/regression/sigqueue/sigqtest1/sigqtest1.c

   1 /* $FreeBSD$ */
   2 #include <signal.h>
   3 #include <stdio.h>
   4 #include <err.h>
   5 #include <errno.h>
   6
   7 int received;
   8
   9 void handler(int sig, siginfo_t *si, void *ctx)
  10 {
  11         if (si->si_code != SI_QUEUE)
  12                 errx(1, "si_code != SI_QUEUE");
  13         if (si->si_value.sival_int != received)
  14                 errx(1, "signal is out of order");
  15         received++;
  16 }
  17
  18 int main()
  19 {
  20         struct sigaction sa;
  21         union sigval val;
  22         int ret;
  23         int i;
  24         sigset_t set;
  25
  26         sa.sa_flags = SA_SIGINFO;
  27         sigemptyset(&sa.sa_mask);
  28         sa.sa_sigaction = handler;
  29         sigaction(SIGRTMIN, &sa, NULL);
  30         sigemptyset(&set);
  31         sigaddset(&set, SIGRTMIN);
  32         sigprocmask(SIG_BLOCK, &set, NULL);
  33         i = 0;
  34         for (;;) {
  35                 val.sival_int = i;
  36                 ret = sigqueue(getpid(), SIGRTMIN, val);
  37                 if (ret == -1) {
  38                         if (errno != EAGAIN) {
  39                                 errx(1, "errno != EAGAIN");
  40                         }
  41                         break;
  42                 }
  43                 i++;
  44         }
  45         sigprocmask(SIG_UNBLOCK, &set, NULL);
  46         if (received != i)
  47                 errx(1, "error, signal lost");
  48         printf("OK\n");
  49 }