VMS Help CC, Run-time functions, wait4  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Waits for a child process to stop or terminate.

  Syntax:

        #include <wait.h>

        pid_t wait4 (pid_t process_id,
                     union wait *status_location,
                     int options,
                     struct rusage *resource_usage);