stand.h

newos is new operation system

/*	$OpenBSD: stand.h,v 1.35 1998/07/29 00:38:36 mickey Exp $	*/
/*	$NetBSD: stand.h,v 1.18 1996/11/30 04:35:51 gwr Exp $	*/

/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	@(#)stand.h	8.1 (Berkeley) 6/11/93
 */

#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/stat.h>
#ifdef __STDC__
#include <machine/stdarg.h>
#else
#include <machine/varargs.h>
#endif
#include "saioctl.h"
#include "saerrno.h"

#ifndef NULL
#define	NULL	0
#endif

struct open_file;

/*
 * Useful macros
 */
#define NENTS(x)	sizeof(x)/sizeof(x[0])
/* don't define if libkern included */
#ifndef LIBKERN_INLINE
#define	max(a,b)	(((a)>(b))? (a) : (b))
#define	min(a,b)	(((a)>(b))? (b) : (a))
#endif

/*
 * This structure is used to define file system operations in a file system
 * independent way.
 */
struct fs_ops {
	int	(*open) __P((char *path, struct open_file *f));
	int	(*close) __P((struct open_file *f));
	int	(*read) __P((struct open_file *f, void *buf,
			     size_t size, size_t *resid));
	int	(*write) __P((struct open_file *f, void *buf,
			     size_t size, size_t *resid));
	off_t	(*seek) __P((struct open_file *f, off_t offset, int where));
	int	(*stat) __P((struct open_file *f, struct stat *sb));
	int	(*readdir) __P((struct open_file *f, char *));
};

extern struct fs_ops file_system[];
extern int nfsys;

/* where values for lseek(2) */
#define	SEEK_SET	0	/* set file offset to offset */
#define	SEEK_CUR	1	/* set file offset to current plus offset */
#define	SEEK_END	2	/* set file offset to EOF plus offset */

/* Device switch */
struct devsw {
	char	*dv_name;
	int	(*dv_strategy) __P((void *devdata, int rw,
				    daddr_t blk, size_t size,
				    void *buf, size_t *rsize));
	int	(*dv_open) __P((struct open_file *f, ...));
	int	(*dv_close) __P((struct open_file *f));
	int	(*dv_ioctl) __P((struct open_file *f, u_long cmd, void *data));
};

extern struct devsw devsw[];	/* device array */
extern int ndevs;		/* number of elements in devsw[] */

extern struct consdev constab[];
extern struct consdev *cn_tab;

struct open_file {
	int		f_flags;	/* see F_* below */
	struct devsw	*f_dev;		/* pointer to device operations */
	void		*f_devdata;	/* device specific data */
	struct fs_ops	*f_ops;		/* pointer to file system operations */
	void		*f_fsdata;	/* file system specific data */
	off_t		f_offset;	/* current file offset (F_RAW) */
};

#define	SOPEN_MAX	4
extern struct open_file files[];

/* f_flags values */
#define	F_READ		0x0001	/* file opened for reading */
#define	F_WRITE		0x0002	/* file opened for writing */
#define	F_RAW		0x0004	/* raw device open - no file system */
#define F_NODEV		0x0008	/* network open - no device */

#define isupper(c)	((c) >= 'A' && (c) <= 'Z')
#define islower(c)	((c) >= 'a' && (c) <= 'z')
#define isalpha(c)	(isupper(c)||islower(c))
#define tolower(c)	(isupper(c)?((c) - 'A' + 'a'):(c))
#define toupper(c)	(islower(c)?((c) - 'a' + 'A'):(c))
#define isspace(c)	((c) == ' ' || (c) == '\t')
#define isdigit(c)	((c) >= '0' && (c) <= '9')

#define	btochs(b,c,h,s,nh,ns)			\
	c = (b) / ((nh) * (ns));		\
	h = ((b) % ((nh) * (ns))) / (ns);	\
	s = ((b) % ((nh) * (ns))) % (ns);

void	*alloc __P((u_int));
void	*alloca __P((size_t));
void	free __P((void *, u_int));
struct	disklabel;
char	*getdisklabel __P((const char *, struct disklabel *));
u_int	dkcksum __P((struct disklabel *));

void	printf __P((const char *, ...));
void	sprintf __P((char *, const char *, ...));
void	vprintf __P((const char *, _BSD_VA_LIST_));
void	twiddle __P((void));
void	gets __P((char *));
__dead void	panic __P((const char *, ...)) __attribute__((noreturn));
__dead void	_rtt __P((void)) __attribute__((noreturn));
#define	bzero(s,n)	((void)memset((s),0,(n)))
#define bcmp(s1,s2,n)	(memcmp((s2),(s1),(n)))
#define	bcopy(s1,s2,n)	((void)memcpy((s2),(s1),(n)))
void	*memcpy __P((void *, const void *, size_t));
int	memcmp __P((const void *, const void*, size_t));
char	*strncpy __P((char *, const char *, size_t));
char	*strcpy __P((char *, const char *));
int	strncmp __P((const char *, const char *, size_t));
size_t	strlen __P((const char *));
long	strtol __P((const char *, char **, int));
char	*strchr __P((const char *, int));
void	*memset __P((void *, int, size_t));
void	exec __P((char *, void *, int));
void	exit __P((void));
int	open __P((const char *, int));
int	close __P((int));
void	closeall __P((void));
ssize_t	read __P((int, void *, size_t));
ssize_t	write __P((int, void *, size_t));
int	stat __P((const char *path, struct stat *sb));
int	fstat __P((int fd, struct stat *sb));
int	opendir __P((char *));
int	readdir __P((int, char *));
void	closedir __P((int));
int	nodev __P((void));
int	noioctl __P((struct open_file *, u_long, void *));
void	nullsys __P((void));

int	null_open __P((char *path, struct open_file *f));
int	null_close __P((struct open_file *f));
ssize_t	null_read __P((struct open_file *f, void *buf,
			size_t size, size_t *resid));
ssize_t	null_write __P((struct open_file *f, void *buf,
			size_t size, size_t *resid));
off_t	null_seek __P((struct open_file *f, off_t offset, int where));
int	null_stat __P((struct open_file *f, struct stat *sb));
int	null_readdir __P((struct open_file *f, char *name));
char	*ttyname __P((int)); /* match userland decl, but ignore !0 */
dev_t	ttydev __P((char *));
void	cninit __P((void));
int	cnset __P((dev_t));
void	cnputc __P((int));
int	cngetc __P((void));
int	cnischar __P((void));
int	cnspeed __P((dev_t, int));
u_int	sleep __P((u_int));
void	usleep __P((u_int));
char *ctime __P((const time_t *));

void	putchar __P((int));    
int	getchar __P((void));

#ifdef __INTERNAL_LIBSA_CREAD
int	oopen __P((const char *, int));
int	oclose __P((int));
ssize_t	oread __P((int, void *, size_t));
off_t	olseek __P((int, off_t, int));
#endif

/* Machine dependent functions */
int	devopen __P((struct open_file *, const char *, char **));
void	machdep_start __P((char *, int, char *, char *, char *));
time_t	getsecs __P((void));