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mm.c revision 1.11 
      1 /*	$NetBSD: mm.c,v 1.11 2008/04/28 20:23:47 martin 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: mm.c,v 1.11 2008/04/28 20:23:47 martin Exp $");
     35 
     36 /*
     37  * Memory special file
     38  */
     39 
     40 #include <sys/param.h>
     41 #include <sys/conf.h>
     42 #include <sys/buf.h>
     43 #include <sys/systm.h>
     44 #include <sys/uio.h>
     45 #include <sys/malloc.h>
     46 #include <sys/ioctl.h>
     47 #include <sys/proc.h>
     48 
     49 dev_type_ioctl(mmioctl);
     50 
     51 int
     52 mmioctl(dev_t dev, u_long cmd, void *data, int flag,
     53     struct lwp *l)
     54 {
     55 	switch (minor(dev)) {
     56 	default:
     57 		switch (cmd) {
     58 		case FIONBIO:	/* We never block anyway */
     59 			return 0;
     60 		case FIOSETOWN:
     61 		case FIOGETOWN:
     62 		case TIOCGPGRP:
     63 		case TIOCSPGRP:
     64 			return ENOTTY;
     65 		case FIOASYNC:
     66 			if ((*(int *)data) == 0)
     67 				return 0;
     68 			/*FALLTHROUGH*/
     69 		}
     70 		return EOPNOTSUPP;
     71 	}
     72 }
     73