bsd/kern/subr_xxx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1982, 1986, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)subr_xxx.c  8.1 (Berkeley) 6/10/93
  56  */
  57
  58 #include <sys/param.h>
  59 #include <sys/systm.h>
  60 #include <sys/conf.h>
  61 #include <sys/buf.h>
  62 #include <sys/proc.h>
  63 #include <sys/vnode.h>
  64 #include <sys/uio.h>
  65
  66 /*
  67  * Unsupported device function (e.g. writing to read-only device).
  68  */
  69 int
  70 enodev()
  71 {
  72         return (ENODEV);
  73 }
  74
  75 /*
  76  * Unsupported strategy function.
  77  */
  78 void
  79 enodev_strat()
  80 {
  81         return;
  82 }
  83
  84 /*
  85  * Unconfigured device function; driver not configured.
  86  */
  87 int
  88 enxio()
  89 {
  90         return (ENXIO);
  91 }
  92
  93 /*
  94  * Unsupported ioctl function.
  95  */
  96 int
  97 enoioctl()
  98 {
  99         return (ENOTTY);
 100 }
 101
 102
 103 /*
 104  * Unsupported system function.
 105  * This is used for an otherwise-reasonable operation
 106  * that is not supported by the current system binary.
 107  */
 108 int
 109 enosys()
 110 {
 111         return (ENOSYS);
 112 }
 113
 114 /*
 115  * Return error for operation not supported
 116  * on a specific object or file type.
 117  */
 118 int
 119 eopnotsupp()
 120 {
 121         return (EOPNOTSUPP);
 122 }
 123
 124 /*
 125  * Generic null operation, always returns success.
 126  */
 127 int
 128 nullop()
 129 {
 130         return (0);
 131 }
 132
 133
 134 /*
 135  * Null routine; placed in insignificant entries
 136  * in the bdevsw and cdevsw tables.
 137  */
 138 int
 139 nulldev()
 140 {
 141         return (0);
 142 }
 143
 144 /*
 145  * Null system calls. Not invalid, just not configured.
 146  */
 147 int
 148 errsys()
 149 {
 150         return(EINVAL);
 151 }
 152
 153 void
 154 nullsys()
 155 {
 156 }
 157
 158 /*
 159  * nonexistent system call-- signal process (may want to handle it)
 160  * flag error if process won't see signal immediately
 161  * Q: should we do that all the time ??
 162  */
 163 /* ARGSUSED */
 164 int
 165 nosys(p, args, retval)
 166         struct proc *p;
 167         void *args;
 168         register_t *retval;
 169 {
 170         psignal(p, SIGSYS);
 171         return (ENOSYS);
 172 }
 173
 174 #ifdef  GPROF
 175 /*
 176  * Stub routine in case it is ever possible to free space.
 177  */
 178 void
 179 cfreemem(cp, size)
 180         caddr_t cp;
 181         int size;
 182 {
 183         printf("freeing %x, size %d\n", cp, size);
 184 }
 185 #endif
 186
 187