/*  Sheila McKain
*   Assignment #2
*   Realtime Systems  */

#include <usr/sys/sys/types.h>
#include <usr/sys/sys/ipc.h>
#include <usr/sys/sys/sem.h>


key_t 	key;
int  	sem_id, nsems, perflags, command;
int	retval, sem_num;
union	semun  {
	int val;
	struct semid_ds *stat;
	ushort *array;
} ctl_arg;

sem_id = semget(key, nsems, permflags);
retval = semctl(sem_id, sem_num, command, ctl_arg);