/* $Id: tf.c,v 1.3 2008/12/01 15:40:23 kostik Exp kostik $ */

#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>

static void
report_sigchld(void)
{
	int err;
	sigset_t oset;

	err = pthread_sigmask(SIG_BLOCK, NULL, &oset);
	if (err != 0) {
		fprintf(stderr, "pthread_sigmask: %s\n", strerror(errno));
		return;
	}
	if (sigismember(&oset, SIGCHLD))
		printf("SIGCHLD is blocked\n");
	else
		printf("SIGCHLD is enabled\n");
}

static void *
mythr(void *arg)
{
	int child;

	printf("Hello\n");
	report_sigchld();
	child = fork();
	if (child == -1) {
		fprintf(stderr, "fork2: %s\n", strerror(errno));
		return (NULL);
	} else if (child == 0) {
		report_sigchld(); /* XXX I know */
	}
	return (NULL);
}

int
main(int argc, char *argv[])
{
	int child, err;
	pthread_t thr;
	pthread_mutex_t m;

	report_sigchld();
	err = pthread_create(&thr, NULL, mythr, NULL);
	if (err != 0) {
		fprintf(stderr, "pthread_create: %s\n",
		    strerror(errno));
		exit(1);
	}
	err = pthread_join(thr, NULL);
	if (err != 0) {
		fprintf(stderr, "pthread_create: %s\n",
		    strerror(errno));
		exit(1);
	}
	exit(0);
}