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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <pthread.h>
static void sig_usr1(int);
static pthread_t main_thread;
void *
child_main(void *no_args)
{
// int i;
// Only do it once, to shorten test --njn
// for (i = 0; i < 5; ++i)
// {
sleep (1);
fprintf (stdout, "thread CHILD sending SIGUSR1 to thread MAIN\n");
if (pthread_kill (main_thread, SIGUSR1) != 0)
fprintf (stderr, "error doing pthread_kill\n");
// }
return no_args;
}
int
main(void)
{
struct sigaction sigact;
sigset_t newmask, oldmask;
pthread_t child;
memset(&newmask, 0, sizeof newmask);
sigemptyset (&newmask);
sigaddset (&newmask, SIGUSR1);
if (pthread_sigmask (SIG_BLOCK, &newmask, &oldmask) != 0)
fprintf (stderr, "SIG_BLOCK error");
memset (&sigact, 0, sizeof sigact);
sigact.sa_handler = sig_usr1;
if (sigaction(SIGUSR1, &sigact, NULL) != 0)
fprintf (stderr, "signal(SIGINT) error");
main_thread = pthread_self ();
if (pthread_create (&child, NULL, child_main, NULL) != 0)
fprintf (stderr, "error creating thread");
pthread_join (child, NULL);
exit(0);
}
static void
sig_usr1 (int signo)
{
fprintf (stderr, "SHOULD NOT BE HERE (SIGUSR1)!!!!\n");
return;
}
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