sys/miscfs/fdesc/fdesc.h

   1 /*      $NetBSD: fdesc.h,v 1.19 2008/06/28 01:34:06 rumble Exp $        */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software donated to Berkeley by
   8  * Jan-Simon Pendry.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)fdesc.h     8.8 (Berkeley) 4/3/95
  35  *
  36  * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
  37  */
  38
  39 #ifdef _KERNEL
  40
  41 #define FD_ROOT         2
  42 #define FD_DEVFD        3
  43 #define FD_STDIN        4
  44 #define FD_STDOUT       5
  45 #define FD_STDERR       6
  46 #define FD_CTTY         7
  47 #define FD_DESC         8
  48 #define FD_MAX          12
  49
  50 typedef enum {
  51         Froot,
  52         Fdevfd,
  53         Fdesc,
  54         Flink,
  55         Fctty
  56 } fdntype;
  57
  58 struct fdescnode {
  59         LIST_ENTRY(fdescnode) fd_hash;  /* Hash list */
  60         struct vnode    *fd_vnode;      /* Back ptr to vnode */
  61         fdntype         fd_type;        /* Type of this node */
  62         unsigned        fd_fd;          /* Fd to be dup'ed */
  63         char            *fd_link;       /* Link to fd/n */
  64         int             fd_ix;          /* filesystem index */
  65 };
  66
  67 #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
  68
  69 extern dev_t devctty;
  70 extern void fdesc_init(void);
  71 extern void fdesc_done(void);
  72 extern int fdesc_root(struct mount *, struct vnode **);
  73 extern int fdesc_allocvp(fdntype, int, struct mount *, struct vnode **);
  74 extern int (**fdesc_vnodeop_p)(void *);
  75 extern struct vfsops fdesc_vfsops;
  76
  77 #endif /* _KERNEL */