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stand.h revision 1.1 
      1 /*-
      2  * Copyright (c) 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)stand.h	8.1 (Berkeley) 6/11/93
     34  *	     $Id: stand.h,v 1.1 1994/01/26 02:03:58 brezak Exp $
     35  */
     36 
     37 #include <sys/types.h>
     38 #include <sys/cdefs.h>
     39 #include <sys/errno.h>
     40 #include <sys/stat.h>
     41 #include "saioctl.h"
     42 #include "saerrno.h"
     43 
     44 #ifndef NULL
     45 #define	NULL	0
     46 #endif
     47 
     48 struct open_file;
     49 
     50 /*
     51  * This structure is used to define file system operations in a file system
     52  * independent way.
     53  */
     54 struct fs_ops {
     55 	int	(*open) __P((char *path, struct open_file *f));
     56 	int	(*close) __P((struct open_file *f));
     57 	int	(*read) __P((struct open_file *f, char *buf,
     58 			u_int size, u_int *resid));
     59 	int	(*write) __P((struct open_file *f, char *buf,
     60 			u_int size, u_int *resid));
     61 	off_t	(*seek) __P((struct open_file *f, off_t offset, int where));
     62 	int	(*stat) __P((struct open_file *f, struct stat *sb));
     63 };
     64 
     65 extern struct fs_ops file_system[];
     66 
     67 /* where values for lseek(2) */
     68 #define	SEEK_SET	0	/* set file offset to offset */
     69 #define	SEEK_CUR	1	/* set file offset to current plus offset */
     70 #define	SEEK_END	2	/* set file offset to EOF plus offset */
     71 
     72 /* Device switch */
     73 struct devsw {
     74 	char	*dv_name;
     75 	int	(*dv_strategy) __P((void *devdata, int rw,
     76 			daddr_t blk, u_int size, char *buf, u_int *rsize));
     77 	int	(*dv_open) __P((struct open_file *f, ...));
     78 	int	(*dv_close) __P((struct open_file *f));
     79 	int	(*dv_ioctl) __P((struct open_file *f, int cmd, void *data));
     80 };
     81 
     82 extern struct devsw devsw[];	/* device array */
     83 extern int ndevs;		/* number of elements in devsw[] */
     84 
     85 struct open_file {
     86 	int		f_flags;	/* see F_* below */
     87 	struct devsw	*f_dev;		/* pointer to device operations */
     88 	void		*f_devdata;	/* device specific data */
     89 	struct fs_ops	*f_ops;		/* pointer to file system operations */
     90 	void		*f_fsdata;	/* file system specific data */
     91 };
     92 
     93 #define	SOPEN_MAX	4
     94 extern struct open_file files[SOPEN_MAX];
     95 
     96 /* f_flags values */
     97 #define	F_READ		0x0001	/* file opened for reading */
     98 #define	F_WRITE		0x0002	/* file opened for writing */
     99 #define	F_RAW		0x0004	/* raw device open - no file system */
    100 
    101 #define isupper(c)	((c) >= 'A' && (c) <= 'Z')
    102 #define tolower(c)	((c) - 'A' + 'a')
    103 #define isspace(c)	((c) == ' ' || (c) == '\t')
    104 #define isdigit(c)	((c) >= '0' && (c) <= '9')
    105 
    106 int	devopen __P((struct open_file *f, char *fname, char **file));
    107 void	*alloc __P((unsigned size));
    108 void	free __P((void *ptr, unsigned size));
    109 struct	disklabel;
    110 char	*getdisklabel __P((const char *buf, struct disklabel *lp));
    111 int	nodev(), noioctl();
    112 void	nullsys();
    113