#ifndef _SYS_WAIT_H #include /* Now define the internal interfaces. */ extern __pid_t __waitpid __P ((__pid_t __pid, int *__stat_loc, int __options)); extern __pid_t __wait3 __P ((__WAIT_STATUS __stat_loc, int __options, struct rusage * __usage)); extern __pid_t __wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc, int __options, struct rusage *__usage)); #endif