bsd/kern/subr_xxx.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1982, 1986, 1991, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)subr_xxx.c  8.1 (Berkeley) 6/10/93
  64  */
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/conf.h>
  69 #include <sys/proc_internal.h>
  70 #include <sys/vnode.h>
  71 #include <sys/uio.h>
  72
  73 /*
  74  * Unsupported device function (e.g. writing to read-only device).
  75  */
  76 int
  77 enodev()
  78 {
  79         return (ENODEV);
  80 }
  81
  82 /*
  83  * Unsupported strategy function.
  84  */
  85 void
  86 enodev_strat()
  87 {
  88         return;
  89 }
  90
  91 /*
  92  * Unconfigured device function; driver not configured.
  93  */
  94 int
  95 enxio()
  96 {
  97         return (ENXIO);
  98 }
  99
 100 /*
 101  * Unsupported ioctl function.
 102  */
 103 int
 104 enoioctl()
 105 {
 106         return (ENOTTY);
 107 }
 108
 109
 110 /*
 111  * Unsupported system function.
 112  * This is used for an otherwise-reasonable operation
 113  * that is not supported by the current system binary.
 114  */
 115 int
 116 enosys()
 117 {
 118         return (ENOSYS);
 119 }
 120
 121 /*
 122  * Return error for operation not supported
 123  * on a specific object or file type.
 124  *
 125  * XXX Name of this routine is wrong.
 126  */
 127 int
 128 eopnotsupp()
 129 {
 130         return (ENOTSUP);
 131 }
 132
 133 /*
 134  * Generic null operation, always returns success.
 135  */
 136 int
 137 nullop()
 138 {
 139         return (0);
 140 }
 141
 142
 143 /*
 144  * Null routine; placed in insignificant entries
 145  * in the bdevsw and cdevsw tables.
 146  */
 147 int
 148 nulldev()
 149 {
 150         return (0);
 151 }
 152
 153 /*
 154  * Null system calls. Not invalid, just not configured.
 155  */
 156 int
 157 errsys()
 158 {
 159         return(EINVAL);
 160 }
 161
 162 void
 163 nullsys()
 164 {
 165 }
 166
 167 /*
 168  * nonexistent system call-- signal process (may want to handle it)
 169  * flag error if process won't see signal immediately
 170  * Q: should we do that all the time ??
 171  */
 172 /* ARGSUSED */
 173 int
 174 nosys(p, args, retval)
 175         struct proc *p;
 176         void *args;
 177         register_t *retval;
 178 {
 179         psignal(p, SIGSYS);
 180         return (ENOSYS);
 181 }
 182
 183 #ifdef  GPROF
 184 /*
 185  * Stub routine in case it is ever possible to free space.
 186  */
 187 void
 188 cfreemem(cp, size)
 189         caddr_t cp;
 190         int size;
 191 {
 192         printf("freeing %x, size %d\n", cp, size);
 193 }
 194 #endif
 195
 196