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Annotation of kernel/bsd/kern/subr_xxx.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            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: #import <cputypes.h>
        !            62: 
        !            63: #import <vm/vm_map.h>
        !            64: #import <vm/vm_kern.h>
        !            65: 
        !            66: #import <sys/param.h>
        !            67: #import <sys/systm.h>
        !            68: #import <sys/conf.h>
        !            69: #import <sys/buf.h>
        !            70: #import <sys/proc.h>
        !            71: #import <sys/vnode.h>
        !            72: #import <sys/uio.h>
        !            73: 
        !            74: #import <kern/thread.h>
        !            75: #import <mach/exception.h>
        !            76: #import <sys/ux_exception.h>
        !            77: 
        !            78: /*
        !            79:  * Unsupported device function (e.g. writing to read-only device).
        !            80:  */
        !            81: int
        !            82: enodev()
        !            83: {
        !            84: 
        !            85:        return (ENODEV);
        !            86: }
        !            87: 
        !            88: /* 
        !            89:  * Unsupported strategy function.
        !            90:  */
        !            91: void enodev_strat()
        !            92: {
        !            93:        return;
        !            94: }
        !            95: 
        !            96: /*
        !            97:  * Unconfigured device function; driver not configured.
        !            98:  */
        !            99: int
        !           100: enxio()
        !           101: {
        !           102: 
        !           103:        return (ENXIO);
        !           104: }
        !           105: 
        !           106: /*
        !           107:  * Unsupported ioctl function.
        !           108:  */
        !           109: int
        !           110: enoioctl()
        !           111: {
        !           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()
        !           124: {
        !           125: 
        !           126:        return (ENOSYS);
        !           127: }
        !           128: 
        !           129: /*
        !           130:  * Return error for operation not supported
        !           131:  * on a specific object or file type.
        !           132:  */
        !           133: int
        !           134: eopnotsupp()
        !           135: {
        !           136: 
        !           137:        return (EOPNOTSUPP);
        !           138: }
        !           139: 
        !           140: /*
        !           141:  * Generic null operation, always returns success.
        !           142:  */
        !           143: int
        !           144: nullop()
        !           145: {
        !           146: 
        !           147:        return (0);
        !           148: }
        !           149: 
        !           150: 
        !           151: /*
        !           152:  * Null routine; placed in insignificant entries
        !           153:  * in the bdevsw and cdevsw tables.
        !           154:  */
        !           155: int nulldev()
        !           156: {
        !           157: 
        !           158:        return (0);
        !           159: }
        !           160: 
        !           161: /*
        !           162:  * Null system calls. Not invalid, just not configured.
        !           163:  */
        !           164: errsys()
        !           165: {
        !           166:        return(EINVAL);
        !           167: }
        !           168: 
        !           169: nullsys()
        !           170: {
        !           171: }
        !           172: 
        !           173: /*
        !           174:  * nonexistent system call-- signal process (may want to handle it)
        !           175:  * flag error if process won't see signal immediately
        !           176:  * Q: should we do that all the time ??
        !           177:  */
        !           178: /* ARGSUSED */
        !           179: int
        !           180: nosys(p, args, retval)
        !           181:        struct proc *p;
        !           182:        void *args;
        !           183:        register_t *retval;
        !           184: {
        !           185: 
        !           186:        psignal(p, SIGSYS);
        !           187:        return (ENOSYS);
        !           188: }
        !           189: 
        !           190: #ifdef GPROF
        !           191: /*
        !           192:  * Stub routine in case it is ever possible to free space.
        !           193:  */
        !           194: cfreemem(cp, size)
        !           195:        caddr_t cp;
        !           196:        int size;
        !           197: {
        !           198:        printf("freeing %x, size %d\n", cp, size);
        !           199: }
        !           200: #endif
        !           201: 
        !           202: 

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