/*      $OpenBSD: recvfrom.c,v 1.2 2016/01/27 01:20:10 jca Exp $        */
/*
 * Federico G. Schwindt <fgsch@openbsd.org>, 2011. Public Domain.
 */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <pthread.h>
#include <signal.h>
#include <unistd.h>
#include "test.h"

volatile sig_atomic_t hits = 0;

void
handler(int sig)
{
        hits++;
}

void *
thr_recvfrom(void *arg)
{
        struct sockaddr_in sa;
        socklen_t salen;
        char buf;
        int s;

        CHECKe(s = socket(AF_INET, SOCK_DGRAM, 0));
        bzero(&sa, sizeof(sa));
        sa.sin_family = AF_INET;
        sa.sin_port = htons(6543);
        CHECKe(bind(s, (const void*)&sa, sizeof(sa)));
        salen = sizeof(sa);
        ASSERT(recvfrom(s, &buf, 1, 0,(struct sockaddr *)&sa, &salen) == -1);
        return ((caddr_t)NULL + errno);
}

int
main(int argc, char **argv)
{
        struct sigaction sa;
        pthread_t tid;
        void *retval;

        bzero(&sa, sizeof(sa));
        sa.sa_handler = handler;
        sa.sa_flags = SA_RESTART;
        CHECKe(sigaction(SIGUSR1, &sa, NULL));
        sa.sa_flags = 0;
        CHECKe(sigaction(SIGUSR2, &sa, NULL));

        CHECKr(pthread_create(&tid, NULL, thr_recvfrom, NULL));
        sleep(2);

        /* Should restart it. */
        CHECKr(pthread_kill(tid, SIGUSR1));
        sleep(1);

        /* Should interrupt it. */
        CHECKr(pthread_kill(tid, SIGUSR2));
        sleep(1);

        CHECKr(pthread_join(tid, &retval));
        ASSERT(retval == (void *)EINTR);
        ASSERT(hits == 2);
        SUCCEED;
}