bsd/kern/subr_xxx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1982, 1986, 1991, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)subr_xxx.c  8.1 (Berkeley) 6/10/93
  59  */
  60
  61 #include <sys/param.h>
  62 #include <sys/systm.h>
  63 #include <sys/conf.h>
  64 #include <sys/buf.h>
  65 #include <sys/proc.h>
  66 #include <sys/vnode.h>
  67 #include <sys/uio.h>
  68
  69 /*
  70  * Unsupported device function (e.g. writing to read-only device).
  71  */
  72 int
  73 enodev()
  74 {
  75         return (ENODEV);
  76 }
  77
  78 /*
  79  * Unsupported strategy function.
  80  */
  81 void
  82 enodev_strat()
  83 {
  84         return;
  85 }
  86
  87 /*
  88  * Unconfigured device function; driver not configured.
  89  */
  90 int
  91 enxio()
  92 {
  93         return (ENXIO);
  94 }
  95
  96 /*
  97  * Unsupported ioctl function.
  98  */
  99 int
 100 enoioctl()
 101 {
 102         return (ENOTTY);
 103 }
 104
 105
 106 /*
 107  * Unsupported system function.
 108  * This is used for an otherwise-reasonable operation
 109  * that is not supported by the current system binary.
 110  */
 111 int
 112 enosys()
 113 {
 114         return (ENOSYS);
 115 }
 116
 117 /*
 118  * Return error for operation not supported
 119  * on a specific object or file type.
 120  */
 121 int
 122 eopnotsupp()
 123 {
 124         return (EOPNOTSUPP);
 125 }
 126
 127 /*
 128  * Generic null operation, always returns success.
 129  */
 130 int
 131 nullop()
 132 {
 133         return (0);
 134 }
 135
 136
 137 /*
 138  * Null routine; placed in insignificant entries
 139  * in the bdevsw and cdevsw tables.
 140  */
 141 int
 142 nulldev()
 143 {
 144         return (0);
 145 }
 146
 147 /*
 148  * Null system calls. Not invalid, just not configured.
 149  */
 150 int
 151 errsys()
 152 {
 153         return(EINVAL);
 154 }
 155
 156 void
 157 nullsys()
 158 {
 159 }
 160
 161 /*
 162  * nonexistent system call-- signal process (may want to handle it)
 163  * flag error if process won't see signal immediately
 164  * Q: should we do that all the time ??
 165  */
 166 /* ARGSUSED */
 167 int
 168 nosys(p, args, retval)
 169         struct proc *p;
 170         void *args;
 171         register_t *retval;
 172 {
 173         psignal(p, SIGSYS);
 174         return (ENOSYS);
 175 }
 176
 177 #ifdef  GPROF
 178 /*
 179  * Stub routine in case it is ever possible to free space.
 180  */
 181 void
 182 cfreemem(cp, size)
 183         caddr_t cp;
 184         int size;
 185 {
 186         printf("freeing %x, size %d\n", cp, size);
 187 }
 188 #endif
 189
 190