gistfile1.txt

			#include <stdio.h>
			#include <stdlib.h>
			#include <unistd.h>
			#include <signal.h>
			#include <pthread.h>
			#include <sys/wait.h>
			#if defined(__FreeBSD__) || defined(__NetBSD__)
			#define SA_STACK SA_ONSTACK
			#endif
			static void
			sigsegv_signal_handler (int _dummy, siginfo_t *info, void *context)
			{
				exit (0);
			}

			static void *
			loop (void *ignored)
			{
				char *ptr = NULL;

				*ptr = 0;
				return NULL;
			}

			static void
			child ()
			{
				struct sigaction sa;
			#ifdef __APPLE__
				stack_t sas;
			#else
				struct sigaltstack sas;
			#endif
				pthread_t id;
				pthread_attr_t attr;

				sa.sa_sigaction = sigsegv_signal_handler;
				sigemptyset (&sa.sa_mask);
				sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
				if (sigaction (SIGSEGV, &sa, NULL) == -1) {
					perror ("sigaction");
					return;
				}

				/* x86 darwin deliver segfaults using SIGBUS */
				if (sigaction (SIGBUS, &sa, NULL) == -1) {
					perror ("sigaction");
					return;
				}
				sas.ss_sp = malloc (SIGSTKSZ);
				sas.ss_size = SIGSTKSZ;
				sas.ss_flags = 0;
				if (sigaltstack (&sas, NULL) == -1) {
					perror ("sigaltstack");
					return;
				}

				pthread_attr_init (&attr);
				if (pthread_create(&id, &attr, loop, &attr) != 0) {
					printf ("pthread_create\n");
					return;
				}

				sleep (100);
			}

			int
			main ()
			{
				pid_t son;
				int status;
				int i;

				son = fork ();
				if (son == -1) {
					return 1;
				}

				if (son == 0) {
					child ();
					return 0;
				}

				for (i = 0; i < 3; ++i) {
					sleep (1);
					waitpid (son, &status, WNOHANG);
					if (WIFEXITED (status) && WEXITSTATUS (status) == 0)
						return 0;
				}

				kill (son, SIGKILL);
				return 1;
			}