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mm.c revision 1.1 
      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