case '?': /* print on-line help */
(void)printf("c(reate) key nsems [ce] perms -- create a semaphore group\n");
-(void)printf("f(ind) semid -- selectsemaphore group by id\n");
+(void)printf("f(ind) semid -- select semaphore group by id\n");
(void)printf("i(ndex) semnum -- select a semaphore index\n");
(void)printf("d(o) op [un] -- do a semaphore operation\n");
(void)printf("v(alue) semid semnum -- query a semaphore's semval\n");