1 /* $NetBSD: mm.c,v 1.1 2002/02/27 01:16:14 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: mm.c,v 1.1 2002/02/27 01:16:14 christos Exp $"); 42 43 /* 44 * Memory special file 45 */ 46 47 #include <sys/param.h> 48 #include <sys/conf.h> 49 #include <sys/buf.h> 50 #include <sys/systm.h> 51 #include <sys/uio.h> 52 #include <sys/malloc.h> 53 #include <sys/ioctl.h> 54 #include <sys/proc.h> 55 56 int 57 mmioctl(dev, cmd, data, flag, p) 58 dev_t dev; 59 u_long cmd; 60 caddr_t data; 61 int flag; 62 struct proc *p; 63 { 64 switch (minor(dev)) { 65 case DEV_MEM: 66 case DEV_KMEM: 67 case DEV_NULL: 68 case DEV_ZERO: 69 switch (cmd) { 70 case FIONBIO: /* We never block anyway */ 71 return 0; 72 case TIOCGPGRP: 73 case TIOCSPGRP: 74 return ENOTTY; 75 case FIOASYNC: 76 if ((*(int *)data) == 0) 77 return 0; 78 /*FALLTHROUGH*/ 79 } 80 /*FALLTHROUGH*/ 81 default: 82 return EOPNOTSUPP; 83 } 84 } 85