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/proc_internal.h>
  62 #include <sys/vnode.h>
  63 #include <sys/uio.h>
  64
  65 /*
  66  * Unsupported device function (e.g. writing to read-only device).
  67  */
  68 int
  69 enodev()
  70 {
  71         return (ENODEV);
  72 }
  73
  74 /*
  75  * Unsupported strategy function.
  76  */
  77 void
  78 enodev_strat()
  79 {
  80         return;
  81 }
  82
  83 /*
  84  * Unconfigured device function; driver not configured.
  85  */
  86 int
  87 enxio()
  88 {
  89         return (ENXIO);
  90 }
  91
  92 /*
  93  * Unsupported ioctl function.
  94  */
  95 int
  96 enoioctl()
  97 {
  98         return (ENOTTY);
  99 }
 100
 101
 102 /*
 103  * Unsupported system function.
 104  * This is used for an otherwise-reasonable operation
 105  * that is not supported by the current system binary.
 106  */
 107 int
 108 enosys()
 109 {
 110         return (ENOSYS);
 111 }
 112
 113 /*
 114  * Return error for operation not supported
 115  * on a specific object or file type.
 116  *
 117  * XXX Name of this routine is wrong.
 118  */
 119 int
 120 eopnotsupp()
 121 {
 122         return (ENOTSUP);
 123 }
 124
 125 /*
 126  * Generic null operation, always returns success.
 127  */
 128 int
 129 nullop()
 130 {
 131         return (0);
 132 }
 133
 134
 135 /*
 136  * Null routine; placed in insignificant entries
 137  * in the bdevsw and cdevsw tables.
 138  */
 139 int
 140 nulldev()
 141 {
 142         return (0);
 143 }
 144
 145 /*
 146  * Null system calls. Not invalid, just not configured.
 147  */
 148 int
 149 errsys()
 150 {
 151         return(EINVAL);
 152 }
 153
 154 void
 155 nullsys()
 156 {
 157 }
 158
 159 /*
 160  * nonexistent system call-- signal process (may want to handle it)
 161  * flag error if process won't see signal immediately
 162  * Q: should we do that all the time ??
 163  */
 164 /* ARGSUSED */
 165 int
 166 nosys(p, args, retval)
 167         struct proc *p;
 168         void *args;
 169         register_t *retval;
 170 {
 171         psignal(p, SIGSYS);
 172         return (ENOSYS);
 173 }
 174
 175 #ifdef  GPROF
 176 /*
 177  * Stub routine in case it is ever possible to free space.
 178  */
 179 void
 180 cfreemem(cp, size)
 181         caddr_t cp;
 182         int size;
 183 {
 184         printf("freeing %x, size %d\n", cp, size);
 185 }
 186 #endif
 187
 188