summaryrefslogtreecommitdiffstats
path: root/lib/libstand/stand.h
blob: e48565ac7c22985fd2ed0156f8fa7a4f9c84c738 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
 * Copyright (c) 1998 Michael Smith.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD$
 * From	$NetBSD: stand.h,v 1.22 1997/06/26 19:17:40 drochner 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>
#include <sys/dirent.h>
#include <string.h>

#define CHK(fmt, args...)	printf("%s(%d): " fmt "\n", __FUNCTION__, __LINE__ , ##args)
#define PCHK(fmt, args...)	{printf("%s(%d): " fmt "\n", __FUNCTION__, __LINE__ , ##args); getchar();}

#ifndef NULL
#define	NULL	0
#endif

/* Avoid unwanted userlandish components */
#define _KERNEL
#include <sys/errno.h>
#undef _KERNEL

/* special stand error codes */
#define	EADAPT	(ELAST+1)	/* bad adaptor */
#define	ECTLR	(ELAST+2)	/* bad controller */
#define	EUNIT	(ELAST+3)	/* bad unit */
#define ESLICE	(ELAST+4)	/* bad slice */
#define	EPART	(ELAST+5)	/* bad partition */
#define	ERDLAB	(ELAST+6)	/* can't read disk label */
#define	EUNLAB	(ELAST+7)	/* unlabeled disk */
#define	EOFFSET	(ELAST+8)	/* relative seek not supported */
#define	ESALAST	(ELAST+8)	/* */

struct open_file;

/*
 * This structure is used to define file system operations in a file system
 * independent way.
 *
 * XXX note that filesystem providers should export a pointer to their fs_ops
 *     struct, so that consumers can reference this and thus include the
 *     filesystems that they require.
 */
struct fs_ops {
    const char	*fs_name;
    int		(*fo_open)(const char *path, struct open_file *f);
    int		(*fo_close)(struct open_file *f);
    int		(*fo_read)(struct open_file *f, void *buf,
			   size_t size, size_t *resid);
    int		(*fo_write)(struct open_file *f, void *buf,
			    size_t size, size_t *resid);
    off_t	(*fo_seek)(struct open_file *f, off_t offset, int where);
    int		(*fo_stat)(struct open_file *f, struct stat *sb);
    int		(*fo_readdir)(struct open_file *f, struct dirent *d);
};

/*
 * libstand-supplied filesystems
 */
extern struct fs_ops ufs_fsops;
extern struct fs_ops tftp_fsops;
extern struct fs_ops nfs_fsops;
extern struct fs_ops cd9660_fsops;
extern struct fs_ops zipfs_fsops;
extern struct fs_ops dosfs_fsops;
extern struct fs_ops ext2fs_fsops;

/* 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 {
    const char	dv_name[8];
    int		dv_type;		/* opaque type constant, arch-dependant */
    int		(*dv_init)(void);	/* early probe call */
    int		(*dv_strategy)(void *devdata, int rw, daddr_t blk, size_t size,
			       char *buf, size_t *rsize);
    int		(*dv_open)(struct open_file *f, ...);
    int		(*dv_close)(struct open_file *f);
    int		(*dv_ioctl)(struct open_file *f, u_long cmd, void *data);
    void	(*dv_print)(int verbose);	/* print device information */
    void	(*dv_cleanup)(void);
};

/*
 * libstand-supplied device switch
 */
extern struct devsw netdev;

extern int errno;

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 */
    char		*f_rabuf;	/* readahead buffer pointer */
    size_t		f_ralen;	/* valid data in readahead buffer */
    off_t		f_raoffset;	/* consumer offset in readahead buffer */
#define SOPEN_RASIZE	512
};

#define	SOPEN_MAX	8
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 isspace(c)	((c) == ' ' || ((c) >= 0x9 && (c) <= 0xd))
#define isdigit(c)	((c) >= '0' && (c) <= '9')
#define isxdigit(c)	(isdigit(c) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
#define isascii(c)	(((c) & ~0x7F) == 0)
#define isalpha(c)	(isupper(c) || (islower(c)))

static __inline int toupper(int c)
{
    return islower(c) ? c - 'a' + 'A' : c;
}

static __inline int tolower(int c)
{
    return isupper(c) ? c - 'A' + 'a' : c;
}

/* sbrk emulation */
extern void	setheap(void *base, void *top);
extern char	*sbrk(int incr);

/* Matt Dillon's zalloc/zmalloc */
extern void	*malloc(size_t bytes);
extern void	free(void *ptr);
/*#define free(p)	{CHK("free %p", p); free(p);} */ /* use for catching guard violations */
extern void	*calloc(size_t n1, size_t n2);
extern void	*realloc(void *ptr, size_t size);
extern void	*reallocf(void *ptr, size_t size);
extern void	mallocstats(void);
#ifdef __alpha__
extern void	free_region(void *start, void *end);
#endif

/* disklabel support (undocumented, may be junk) */
struct		disklabel;
extern char	*getdisklabel(const char *, struct disklabel *);
extern int	dkcksum(struct disklabel *);

extern int	printf(const char *fmt, ...);
extern void	vprintf(const char *fmt, _BSD_VA_LIST_);
extern int	sprintf(char *buf, const char *cfmt, ...);
extern void	vsprintf(char *buf, const char *cfmt, _BSD_VA_LIST_);

extern void	twiddle(void);

extern void	ngets(char *, int);
#define gets(x)	ngets((x), 0)
extern int	fgetstr(char *buf, int size, int fd);

extern int	open(const char *, int);
#define	O_RDONLY	0x0
#define O_WRONLY	0x1			/* writing not (yet?) supported */
#define O_RDWR		0x2
extern int	close(int);
extern void	closeall(void);
extern ssize_t	read(int, void *, size_t);
extern ssize_t	write(int, void *, size_t);
extern struct	dirent *readdirfd(int);

extern void	srandom(u_long seed);
extern u_long	random(void);
    
/* imports from stdlib, locally modified */
extern long	strtol(const char *, char **, int);
extern char	*optarg;			/* getopt(3) external variables */
extern int	optind, opterr, optopt, optreset;
extern int	getopt(int, char * const [], const char *);

/* pager.c */
extern void	pager_open(void);
extern void	pager_close(void);
extern int	pager_output(const char *lines);
extern int	pager_file(const char *fname);

/* No signal state to preserve */
#define setjmp	_setjmp
#define longjmp	_longjmp

/* environment.c */
#define EV_DYNAMIC	(1<<0)		/* value was dynamically allocated, free if changed/unset */
#define EV_VOLATILE	(1<<1)		/* value is volatile, make a copy of it */
#define EV_NOHOOK	(1<<2)		/* don't call hook when setting */

struct env_var;
typedef char	*(ev_format_t)(struct env_var *ev);
typedef int	(ev_sethook_t)(struct env_var *ev, int flags, void *value);
typedef int	(ev_unsethook_t)(struct env_var *ev);

struct env_var
{
    char		*ev_name;
    int			ev_flags;
    void		*ev_value;
    ev_sethook_t	*ev_sethook;
    ev_unsethook_t	*ev_unsethook;
    struct env_var	*ev_next, *ev_prev;
};
extern struct env_var	*environ;

extern struct env_var	*env_getenv(const char *name);
extern int		env_setenv(const char *name, int flags,
				   const void *value, ev_sethook_t sethook,
				   ev_unsethook_t unsethook);
extern char		*getenv(const char *name);
extern int		setenv(const char *name, const char *value,
			       int overwrite);
extern int		putenv(const char *string);
extern int		unsetenv(const char *name);

extern ev_sethook_t	env_noset;		/* refuse set operation */
extern ev_unsethook_t	env_nounset;		/* refuse unset operation */

/* BCD conversions (undocumented) */
extern u_char const	bcd2bin_data[];
extern u_char const	bin2bcd_data[];
extern char const	hex2ascii_data[];

#define	bcd2bin(bcd)	(bcd2bin_data[bcd])
#define	bin2bcd(bin)	(bin2bcd_data[bin])
#define	hex2ascii(hex)	(hex2ascii_data[hex])

/* min/max (undocumented) */
static __inline int imax(int a, int b) { return (a > b ? a : b); }
static __inline int imin(int a, int b) { return (a < b ? a : b); }
static __inline long lmax(long a, long b) { return (a > b ? a : b); }
static __inline long lmin(long a, long b) { return (a < b ? a : b); }
static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }

/* swaps (undocumented, useful?) */
#ifdef __i386__
extern u_int32_t	bswap32(u_int32_t x);
extern u_int64_t	bswap64(u_int32_t x);
#endif

/* null functions for device/filesystem switches (undocumented) */
extern int	nodev(void);
extern int	noioctl(struct open_file *, u_long, void *);
extern void	nullsys(void);

extern int	null_open(const char *path, struct open_file *f);
extern int	null_close(struct open_file *f);
extern int	null_read(struct open_file *f, void *buf, size_t size, size_t *resid);
extern int	null_write(struct open_file *f, void *buf, size_t size, size_t *resid);
extern off_t	null_seek(struct open_file *f, off_t offset, int where);
extern int	null_stat(struct open_file *f, struct stat *sb);
extern int	null_readdir(struct open_file *f, struct dirent *d);


/* 
 * Machine dependent functions and data, must be provided or stubbed by 
 * the consumer 
 */
extern int		getchar(void);
extern int		ischar(void);
extern void		putchar(int);
extern int		devopen(struct open_file *, const char *, const char **);
extern int		devclose(struct open_file *f);
extern void		panic(const char *, ...) __dead2;
extern struct fs_ops	*file_system[];
extern struct devsw	*devsw[];

#if 0

static inline void *
malloc_debug(size_t size, const char *file, int line)
{
    void *p;
    printf("%s:%d malloc(%ld)", file, line, size);
    p = malloc(size);
    printf("=%p\n", p);
    return p;
}

static inline void
free_debug(void *p, const char *file, int line)
{
    printf("%s:%d free(%p)\n", file, line, p);
    free(p);
}

#define malloc(x)	malloc_debug(x, __FILE__, __LINE__)
#define free(x)		free_debug(x, __FILE__, __LINE__)

#endif
OpenPOWER on IntegriCloud