#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <string.h>

int main() 
{
	char * p;

	p = malloc(10);

	strcpy(p, "abcd");

        /* bad programming, should always check a system call returning -1 */
	if (fork() == 0) { 
		printf("child process, pid = %d, p = %p, content(p) = %s\n", getpid(),
				(void *)p, p);
		strcpy(p, "kkkkk");
	} else {
		wait(NULL); /* parent wait for child to finish */
	}

	printf("pid = %d, p = %p, content(p) = %s\n", getpid(), (void *)p, p);
	return(EXIT_SUCCESS);
}