The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/mm.c

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    1 /*      $NetBSD: mm.c,v 1.13 2008/10/08 16:11:23 oster 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 1.13 2008/10/08 16:11:23 oster 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 #include <sys/termios.h>
   49 
   50 dev_type_ioctl(mmioctl);
   51 
   52 int
   53 mmioctl(dev_t dev, u_long cmd, void *data, int flag,
   54     struct lwp *l)
   55 {
   56         switch (minor(dev)) {
   57         default:
   58                 switch (cmd) {
   59                 case FIONBIO:   /* We never block anyway */
   60                         return 0;
   61                 case FIOSETOWN:
   62                 case FIOGETOWN:
   63                 case TIOCGPGRP:
   64                 case TIOCSPGRP:
   65                 case TIOCGETA:
   66                         return ENOTTY;
   67                 case FIOASYNC:
   68                         if ((*(int *)data) == 0)
   69                                 return 0;
   70                         /*FALLTHROUGH*/
   71                 }
   72                 return EOPNOTSUPP;
   73         }
   74 }

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