FreeBSD/Linux Kernel Cross Reference
sys/miscfs/fdesc/fdesc.h

     /*      $NetBSD: fdesc.h,v 1.16 2004/05/20 06:34:30 atatat Exp $        */
     
     /*
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software donated to Berkeley by
      * Jan-Simon Pendry.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)fdesc.h     8.8 (Berkeley) 4/3/95
     *
     * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
     */
    
    #ifdef _KERNEL
    struct fdescmount {
            struct vnode    *f_root;        /* Root node */
    };
    
    #define FD_ROOT         2
    #define FD_DEVFD        3
    #define FD_STDIN        4
    #define FD_STDOUT       5
    #define FD_STDERR       6
    #define FD_CTTY         7
    #define FD_DESC         8
    #define FD_MAX          12
    
    typedef enum {
            Froot,
            Fdevfd,
            Fdesc,
            Flink,
            Fctty
    } fdntype;
    
    struct fdescnode {
            LIST_ENTRY(fdescnode) fd_hash;  /* Hash list */
            struct vnode    *fd_vnode;      /* Back ptr to vnode */
            fdntype         fd_type;        /* Type of this node */
            unsigned        fd_fd;          /* Fd to be dup'ed */
            char            *fd_link;       /* Link to fd/n */
            int             fd_ix;          /* filesystem index */
    };
    
    #define VFSTOFDESC(mp)  ((struct fdescmount *)((mp)->mnt_data))
    #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
    
    extern dev_t devctty;
    extern void fdesc_init __P((void));
    extern void fdesc_done __P((void));
    extern int fdesc_root __P((struct mount *, struct vnode **));
    extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
    extern int (**fdesc_vnodeop_p) __P((void *));
    extern struct vfsops fdesc_vfsops;
    
    #ifdef SYSCTL_SETUP_PROTO
    SYSCTL_SETUP_PROTO(sysctl_vfs_fdesc_setup);
    #endif /* SYSCTL_SETUP_PROTO */
    #endif /* _KERNEL */

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