bsd/kern/subr_xxx.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1982, 1986, 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)subr_xxx.c  8.1 (Berkeley) 6/10/93
  62  */
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/conf.h>
  67 #include <sys/proc_internal.h>
  68 #include <sys/vnode.h>
  69 #include <sys/uio.h>
  70 #include <sys/sysproto.h>
  71
  72 #include <sys/signalvar.h>              /* for psignal() */
  73
  74
  75 #ifdef GPROF
  76 #include <sys/gmon.h>
  77 #endif
  78
  79
  80 /*
  81  * Unsupported device function (e.g. writing to read-only device).
  82  */
  83 int
  84 enodev(void)
  85 {
  86         return (ENODEV);
  87 }
  88
  89 /*
  90  * Unsupported strategy function.
  91  */
  92 void
  93 enodev_strat(void)
  94 {
  95         return;
  96 }
  97
  98 /*
  99  * Unconfigured device function; driver not configured.
 100  */
 101 int
 102 enxio(void)
 103 {
 104         return (ENXIO);
 105 }
 106
 107 /*
 108  * Unsupported ioctl function.
 109  */
 110 int
 111 enoioctl(void)
 112 {
 113         return (ENOTTY);
 114 }
 115
 116
 117 /*
 118  * Unsupported system function.
 119  * This is used for an otherwise-reasonable operation
 120  * that is not supported by the current system binary.
 121  */
 122 int
 123 enosys(void)
 124 {
 125         return (ENOSYS);
 126 }
 127
 128 /*
 129  * Return error for operation not supported
 130  * on a specific object or file type.
 131  *
 132  * XXX Name of this routine is wrong.
 133  */
 134 int
 135 eopnotsupp(void)
 136 {
 137         return (ENOTSUP);
 138 }
 139
 140 /*
 141  * Generic null operation, always returns success.
 142  */
 143 int
 144 nullop(void)
 145 {
 146         return (0);
 147 }
 148
 149
 150 /*
 151  * Null routine; placed in insignificant entries
 152  * in the bdevsw and cdevsw tables.
 153  */
 154 int
 155 nulldev(void)
 156 {
 157         return (0);
 158 }
 159
 160 /*
 161  * Null system calls. Not invalid, just not configured.
 162  */
 163 int
 164 errsys(void)
 165 {
 166         return(EINVAL);
 167 }
 168
 169 void
 170 nullsys(void)
 171 {
 172 }
 173
 174 /*
 175  * nonexistent system call-- signal process (may want to handle it)
 176  * flag error if process won't see signal immediately
 177  * Q: should we do that all the time ??
 178  */
 179 /* ARGSUSED */
 180 int
 181 nosys(struct proc *p, __unused struct nosys_args *args, __unused int32_t *retval)
 182 {
 183         psignal(p, SIGSYS);
 184         return (ENOSYS);
 185 }
 186
 187 #ifdef  GPROF
 188 /*
 189  * Stub routine in case it is ever possible to free space.
 190  */
 191 void
 192 cfreemem(caddr_t cp, int size)
 193 {
 194         printf("freeing %p, size %d\n", cp, size);
 195 }
 196 #endif
 197
 198