tools/regression/sigqueue/sigqtest1/sigqtest1.c

   1 /* $FreeBSD$ */
   2 #include <err.h>
   3 #include <errno.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <unistd.h>
   7
   8 int received;
   9
  10 void
  11 handler(int sig, siginfo_t *si, void *ctx)
  12 {
  13         if (si->si_code != SI_QUEUE)
  14                 errx(1, "si_code != SI_QUEUE");
  15         if (si->si_value.sival_int != received)
  16                 errx(1, "signal is out of order");
  17         received++;
  18 }
  19
  20 int
  21 main()
  22 {
  23         struct sigaction sa;
  24         union sigval val;
  25         int ret;
  26         int i;
  27         sigset_t set;
  28
  29         sa.sa_flags = SA_SIGINFO;
  30         sigemptyset(&sa.sa_mask);
  31         sa.sa_sigaction = handler;
  32         sigaction(SIGRTMIN, &sa, NULL);
  33         sigemptyset(&set);
  34         sigaddset(&set, SIGRTMIN);
  35         sigprocmask(SIG_BLOCK, &set, NULL);
  36         i = 0;
  37         for (;;) {
  38                 val.sival_int = i;
  39                 ret = sigqueue(getpid(), SIGRTMIN, val);
  40                 if (ret == -1) {
  41                         if (errno != EAGAIN) {
  42                                 errx(1, "errno != EAGAIN");
  43                         }
  44                         break;
  45                 }
  46                 i++;
  47         }
  48         sigprocmask(SIG_UNBLOCK, &set, NULL);
  49         if (received != i)
  50                 errx(1, "error, signal lost");
  51         printf("OK\n");
  52 }