root@cpc304:~# cat test.c
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>

main()
{
  pid_t pid;
  int rv;
  switch(pid=fork()) {
  case -1:
          perror("fork");
          exit(1);
  case 0:
          printf("child\n");
          sleep(3);
          printf("child done\n");
          sleep(1);
          break;
  default:
        printf("parent\n");
        waitpid(pid, 0, 0);
        printf("finished\n");
  }
}
root@cpc304:~# gcc test.c -o test
root@cpc304:~# ./test
parent
child
child done
finished
root@cpc304:~#