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Annotation of XNU/bsd/miscfs/fdesc/fdesc.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            23: /*
        !            24:  * Copyright (c) 1992, 1993
        !            25:  *     The Regents of the University of California.  All rights reserved.
        !            26:  *
        !            27:  * This code is derived from software donated to Berkeley by
        !            28:  * Jan-Simon Pendry.
        !            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:  *     @(#)fdesc.h     8.6 (Berkeley) 8/20/94
        !            59:  *
        !            60:  * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
        !            61:  */
        !            62: 
        !            63: #ifdef KERNEL
        !            64: struct fdescmount {
        !            65:        struct vnode    *f_root;        /* Root node */
        !            66: };
        !            67: 
        !            68: #define FD_ROOT                2
        !            69: #define FD_DEVFD       3
        !            70: #define FD_STDIN       4
        !            71: #define FD_STDOUT      5
        !            72: #define FD_STDERR      6
        !            73: #define FD_CTTY                7
        !            74: #define FD_DESC                8
        !            75: #define FD_MAX         12
        !            76: 
        !            77: typedef enum {
        !            78:        Froot,
        !            79:        Fdevfd,
        !            80:        Fdesc,
        !            81:        Flink,
        !            82:        Fctty
        !            83: } fdntype;
        !            84: 
        !            85: struct fdescnode {
        !            86:        LIST_ENTRY(fdescnode) fd_hash;  /* Hash list */
        !            87:        struct vnode    *fd_vnode;      /* Back ptr to vnode */
        !            88:        fdntype         fd_type;        /* Type of this node */
        !            89:        unsigned        fd_fd;          /* Fd to be dup'ed */
        !            90:        char            *fd_link;       /* Link to fd/n */
        !            91:        int             fd_ix;          /* filesystem index */
        !            92: };
        !            93: 
        !            94: #define VFSTOFDESC(mp) ((struct fdescmount *)((mp)->mnt_data))
        !            95: #define        VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
        !            96: 
        !            97: extern dev_t devctty;
        !            98: extern int fdesc_init __P((struct vfsconf *));
        !            99: extern int fdesc_root __P((struct mount *, struct vnode **));
        !           100: extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
        !           101: extern int (**fdesc_vnodeop_p)();
        !           102: extern struct vfsops fdesc_vfsops;
        !           103: #endif /* KERNEL */

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