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fdesc.h revision 1.3 
      1 /*
      2  * Copyright (c) 1992 The Regents of the University of California
      3  * Copyright (c) 1990, 1992 Jan-Simon Pendry
      4  * All rights reserved.
      5  *
      6  * This code is derived from software donated to Berkeley by
      7  * Jan-Simon Pendry.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the University of
     20  *	California, Berkeley and its contributors.
     21  * 4. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  * From:
     38  *	Id: fdesc.h,v 4.1 1993/12/17 10:47:45 jsp Rel
     39  *
     40  *	$Id: fdesc.h,v 1.3 1994/01/05 09:00:57 cgd Exp $
     41  */
     42 
     43 #ifdef KERNEL
     44 struct fdescmount {
     45 	struct vnode	*f_root;	/* Root node */
     46 };
     47 
     48 #define FD_ROOT		2
     49 #define FD_DEVFD	3
     50 #define FD_STDIN	4
     51 #define FD_STDOUT	5
     52 #define FD_STDERR	6
     53 #define FD_CTTY		7
     54 #define FD_DESC		8
     55 #define FD_MAX		12
     56 
     57 typedef enum {
     58 	Froot,
     59 	Fdevfd,
     60 	Fdesc,
     61 	Flink,
     62 	Fctty
     63 } fdntype;
     64 
     65 struct fdescnode {
     66 	fdntype		fd_type;	/* Type of this node */
     67 	unsigned	fd_fd;		/* Fd to be dup'ed */
     68 	char		*fd_link;	/* Link to fd/n */
     69 	int		fd_ix;		/* filesystem index */
     70 };
     71 
     72 #define VFSTOFDESC(mp)	((struct fdescmount *)((mp)->mnt_data))
     73 #define	VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
     74 
     75 extern dev_t devctty;
     76 extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
     77 extern struct vnodeops fdesc_vnodeops;
     78 extern struct vfsops fdesc_vfsops;
     79 #endif /* KERNEL */
     80