Child process return wrong value - process

Question

I want see what will getppid() is returned function when child process will execute. I entered sleep(10) to complete parent process. Actually I should obtain "CHILD: My parent PID -- 1\n", because this child process should have init process as parent if parent does not call wait().
But I am obtaining PPID=959. This is not init-process. This PPID corresponds to some /sbin/upstart --user command.
This is my code:
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(void) {
int status;
pid_t pid, ch_pid;
switch(pid=fork()) {
case -1:
perror("Fork failed");
exit(1);
case 0:
sleep(10);
printf("\nCHILD: This is child process!\n");
printf("CHILD: My PID is-- %d\n", getpid());
printf("CHILD: My parent PID -- %d\n", getppid());
//sleep(5);
exit(0);
default:
//sleep(60);
/*Prohibit PP to execute*/
printf("PARENT: This is parent process!\n");
printf("PARENT: My PID -- %d\n", getpid());
printf("PARENT: My child PID %d\n",pid);
printf("PARENT: My parent PID %d\n",getppid());
exit(0);
}
return 0;
}
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