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mm.c revision 1.10 
      1 /*	$NetBSD: mm.c,v 1.10 2007/03/04 06:01:43 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 1.10 2007/03/04 06:01:43 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 dev_type_ioctl(mmioctl);
     57 
     58 int
     59 mmioctl(dev_t dev, u_long cmd, void *data, int flag,
     60     struct lwp *l)
     61 {
     62 	switch (minor(dev)) {
     63 	default:
     64 		switch (cmd) {
     65 		case FIONBIO:	/* We never block anyway */
     66 			return 0;
     67 		case FIOSETOWN:
     68 		case FIOGETOWN:
     69 		case TIOCGPGRP:
     70 		case TIOCSPGRP:
     71 			return ENOTTY;
     72 		case FIOASYNC:
     73 			if ((*(int *)data) == 0)
     74 				return 0;
     75 			/*FALLTHROUGH*/
     76 		}
     77 		return EOPNOTSUPP;
     78 	}
     79 }
     80