bsd/kern/subr_xxx.c

   1 /*
   2  * Copyright (c) 2018 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/kernel.h>
  67 #include <sys/conf.h>
  68 #include <sys/proc_internal.h>
  69 #include <sys/vnode.h>
  70 #include <sys/uio.h>
  71 #include <sys/sysproto.h>
  72
  73 #include <sys/signalvar.h>              /* for psignal() */
  74 #include <kern/debug.h>
  75
  76 #if DEVELOPMENT || DEBUG
  77 bool send_sigsys = true;
  78 #else
  79 #define send_sigsys true
  80 #endif
  81
  82 /*
  83  * Unsupported device function (e.g. writing to read-only device).
  84  */
  85 int
  86 enodev(void)
  87 {
  88         return ENODEV;
  89 }
  90
  91 /*
  92  * Unsupported strategy function.
  93  */
  94 void
  95 enodev_strat(void)
  96 {
  97         return;
  98 }
  99
 100 /*
 101  * Unconfigured device function; driver not configured.
 102  */
 103 int
 104 enxio(void)
 105 {
 106         return ENXIO;
 107 }
 108
 109 /*
 110  * Unsupported ioctl function.
 111  */
 112 int
 113 enoioctl(void)
 114 {
 115         return ENOTTY;
 116 }
 117
 118
 119 /*
 120  * Unsupported system function.
 121  * This is used for an otherwise-reasonable operation
 122  * that is not supported by the current system binary.
 123  */
 124 int
 125 enosys(void)
 126 {
 127         return ENOSYS;
 128 }
 129
 130 /*
 131  * Return error for operation not supported
 132  * on a specific object or file type.
 133  *
 134  * XXX Name of this routine is wrong.
 135  */
 136 int
 137 eopnotsupp(void)
 138 {
 139         return ENOTSUP;
 140 }
 141
 142 /*
 143  * Generic null operation, always returns success.
 144  */
 145 int
 146 nullop(void)
 147 {
 148         return 0;
 149 }
 150
 151
 152 /*
 153  * Null routine; placed in insignificant entries
 154  * in the bdevsw and cdevsw tables.
 155  */
 156 int
 157 nulldev(void)
 158 {
 159         return 0;
 160 }
 161
 162 /*
 163  * Null system calls. Not invalid, just not configured.
 164  */
 165 int
 166 errsys(void)
 167 {
 168         return EINVAL;
 169 }
 170
 171 void
 172 nullsys(void)
 173 {
 174 }
 175
 176 /*
 177  * nonexistent system call-- signal process (may want to handle it)
 178  * flag error if process won't see signal immediately
 179  * Q: should we do that all the time ??
 180  */
 181 /* ARGSUSED */
 182 int
 183 nosys(__unused struct proc *p, __unused struct nosys_args *args, __unused int32_t *retval)
 184 {
 185         if (send_sigsys) {
 186                 psignal_uthread(current_thread(), SIGSYS);
 187         }
 188         return ENOSYS;
 189 }
 190
 191 #if !CRYPTO
 192 #include <crypto/rc4/rc4.h>
 193
 194 /* Stubs must be present in all configs for Unsupported KPI exports */
 195
 196 void
 197 rc4_init(struct rc4_state *state __unused, const u_char *key __unused, int keylen __unused)
 198 {
 199         panic("rc4_init: unsupported kernel configuration");
 200 }
 201
 202 void
 203 rc4_crypt(struct rc4_state *state __unused,
 204     const u_char *inbuf __unused, u_char *outbuf __unused, int buflen __unused)
 205 {
 206         panic("rc4_crypt: unsupported kernel configuration");
 207 }
 208 #endif /* !CRYPTO */