Function msq_prison_cansee

freebsd/kern/sysv_msg.c:462–471

}

static int
msq_prison_cansee(struct prison *rpr, struct msqid_kernel *msqkptr)
{

	if (msqkptr->cred == NULL ||
	    !(rpr == msqkptr->cred->cr_prison ||
	      prison_ischild(rpr, msqkptr->cred->cr_prison)))
		return (EINVAL);
	return (0);
}

#ifndef _SYS_SYSPROTO_H_
struct msgctl_args {