lib/libstand/stand.h

   1 /*
   2  * Copyright (c) 1998 Michael Smith.
   3  * 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  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libstand/stand.h,v 1.18.2.8 2002/06/17 11:22:39 sobomax Exp $
  27  * $DragonFly: src/lib/libstand/stand.h,v 1.11 2008/09/13 11:38:58 corecode Exp $
  28  * From $NetBSD: stand.h,v 1.22 1997/06/26 19:17:40 drochner Exp $
  29  */
  30
  31 /*-
  32  * Copyright (c) 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)stand.h     8.1 (Berkeley) 6/11/93
  64  */
  65
  66 #ifndef _MACHINE_STDARG_H_
  67 #include <machine/stdarg.h>     /* __va_list */
  68 #endif
  69 #include <sys/types.h>
  70 #include <sys/cdefs.h>
  71 #include <sys/stat.h>
  72 #include <sys/dirent.h>
  73 #include <string.h>
  74
  75 #define CHK(fmt, args...)       printf("%s(%d): " fmt "\n", __func__, __LINE__ , ##args)
  76 #define PCHK(fmt, args...)      {printf("%s(%d): " fmt "\n", __func__, __LINE__ , ##args); getchar();}
  77
  78 /* Avoid unwanted userlandish components */
  79 #define _KERNEL
  80 #include <sys/errno.h>
  81 #undef _KERNEL
  82
  83 /* special stand error codes */
  84 #define EADAPT  (ELAST+1)       /* bad adaptor */
  85 #define ECTLR   (ELAST+2)       /* bad controller */
  86 #define EUNIT   (ELAST+3)       /* bad unit */
  87 #define ESLICE  (ELAST+4)       /* bad slice */
  88 #define EPART   (ELAST+5)       /* bad partition */
  89 #define ERDLAB  (ELAST+6)       /* can't read disk label */
  90 #define EUNLAB  (ELAST+7)       /* unlabeled disk */
  91 #define EOFFSET (ELAST+8)       /* relative seek not supported */
  92 #define ESALAST (ELAST+8)       /* */
  93
  94 struct open_file;
  95
  96 /*
  97  * This structure is used to define file system operations in a file system
  98  * independent way.
  99  *
 100  * XXX note that filesystem providers should export a pointer to their fs_ops
 101  *     struct, so that consumers can reference this and thus include the
 102  *     filesystems that they require.
 103  */
 104 struct fs_ops {
 105     const char  *fs_name;
 106     int         (*fo_open)(const char *, struct open_file *);
 107     int         (*fo_close)(struct open_file *);
 108     int         (*fo_read)(struct open_file *, void *,
 109                            size_t, size_t *);
 110     int         (*fo_write)(struct open_file *, void *,
 111                             size_t, size_t *);
 112     off_t       (*fo_seek)(struct open_file *, off_t, int);
 113     int         (*fo_stat)(struct open_file *, struct stat *);
 114     int         (*fo_readdir)(struct open_file *, struct dirent *);
 115 };
 116
 117 /*
 118  * libstand-supplied filesystems
 119  */
 120 extern struct fs_ops ufs_fsops;
 121 extern struct fs_ops hammer_fsops;
 122 extern struct fs_ops tftp_fsops;
 123 extern struct fs_ops nfs_fsops;
 124 extern struct fs_ops cd9660_fsops;
 125 extern struct fs_ops gzipfs_fsops;
 126 extern struct fs_ops zipfs_fsops;
 127 extern struct fs_ops bzipfs_fsops;
 128 extern struct fs_ops dosfs_fsops;
 129 extern struct fs_ops ext2fs_fsops;
 130 extern struct fs_ops splitfs_fsops;
 131
 132 /* where values for lseek(2) */
 133 #define SEEK_SET        0       /* set file offset to offset */
 134 #define SEEK_CUR        1       /* set file offset to current plus offset */
 135 #define SEEK_END        2       /* set file offset to EOF plus offset */
 136
 137 /*
 138  * Device switch
 139  */
 140 struct devsw {
 141     const char  dv_name[8];
 142     int         dv_type;                /* opaque type constant, arch-dependant */
 143     int         (*dv_init)(void);       /* early probe call */
 144     int         (*dv_strategy)(void *, int, daddr_t, size_t, char *, size_t *);
 145     int         (*dv_open)(struct open_file *, ...);
 146     int         (*dv_close)(struct open_file *);
 147     int         (*dv_ioctl)(struct open_file *, u_long, void *);
 148     void        (*dv_print)(int);       /* print device information */
 149     void        (*dv_cleanup)(void);
 150 };
 151
 152 /*
 153  * libstand-supplied device switch
 154  */
 155 extern struct devsw netdev;
 156
 157 extern int errno;
 158
 159 struct open_file {
 160     int                 f_flags;        /* see F_* below */
 161     struct devsw        *f_dev;         /* pointer to device operations */
 162     void                *f_devdata;     /* device specific data */
 163     struct fs_ops       *f_ops;         /* pointer to file system operations */
 164     void                *f_fsdata;      /* file system specific data */
 165     off_t               f_offset;       /* current file offset */
 166     char                *f_rabuf;       /* readahead buffer pointer */
 167     size_t              f_ralen;        /* valid data in readahead buffer */
 168     off_t               f_raoffset;     /* consumer offset in readahead buffer */
 169 #define SOPEN_RASIZE    512
 170 };
 171
 172 #define SOPEN_MAX       8
 173 extern struct open_file files[];
 174
 175 /* f_flags values */
 176 #define F_READ          0x0001  /* file opened for reading */
 177 #define F_WRITE         0x0002  /* file opened for writing */
 178 #define F_RAW           0x0004  /* raw device open - no file system */
 179 #define F_NODEV         0x0008  /* network open - no device */
 180
 181 #define isascii(c)      (((c) & ~0x7F) == 0)
 182
 183 static __inline int
 184 isupper(int c)
 185 {
 186     return c >= 'A' && c <= 'Z';
 187 }
 188
 189 static __inline int
 190 islower(int c)
 191 {
 192     return c >= 'a' && c <= 'z';
 193 }
 194
 195 static __inline int
 196 isspace(int c)
 197 {
 198     return c == ' ' || (c >= 0x9 && c <= 0xd);
 199 }
 200
 201 static __inline int
 202 isdigit(int c)
 203 {
 204     return c >= '0' && c <= '9';
 205 }
 206
 207 static __inline int
 208 isxdigit(int c)
 209 {
 210     return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
 211 }
 212
 213 static __inline int
 214 isalpha(int c)
 215 {
 216     return isupper(c) || islower(c);
 217 }
 218
 219 static __inline int
 220 isalnum(int c)
 221 {
 222     return isalpha(c) || isdigit(c);
 223 }
 224
 225 static __inline int
 226 toupper(int c)
 227 {
 228     return islower(c) ? c - 'a' + 'A' : c;
 229 }
 230
 231 static __inline int
 232 tolower(int c)
 233 {
 234     return isupper(c) ? c - 'A' + 'a' : c;
 235 }
 236
 237 /* sbrk emulation */
 238 extern void     setheap(void *, void *);
 239 extern char     *sbrk(int);
 240
 241 /* Matt Dillon's zalloc/zmalloc */
 242 extern void     *malloc(size_t);
 243 extern void     free(void *);
 244 /*#define free(p)       {CHK("free %p", p); free(p);} */ /* use for catching guard violations */
 245 extern void     *calloc(size_t, size_t);
 246 extern void     *realloc(void *, size_t);
 247 extern void     *reallocf(void *, size_t);
 248 extern void     mallocstats(void);
 249
 250 /* disklabel support (undocumented, may be junk) */
 251 struct          disklabel32;
 252 extern char     *getdisklabel32(const char *, struct disklabel32 *);
 253
 254 extern int      printf(const char *, ...);
 255 extern void     vprintf(const char *, __va_list);
 256 extern int      sprintf(char *, const char *, ...);
 257 extern void     vsprintf(char *, const char *, __va_list);
 258 int             snprintf(char *, size_t, const char *, ...);
 259 int             vsnprintf(char *, size_t, const char *, __va_list);
 260
 261 extern void     twiddle(void);
 262
 263 extern void     ngets(char *, int);
 264 #define gets(x) ngets((x), 0)
 265 extern int      fgetstr(char *, int, int);
 266
 267 extern int      open(const char *, int);
 268 #define O_RDONLY        0x0
 269 #define O_WRONLY        0x1                     /* writing not (yet?) supported */
 270 #define O_RDWR          0x2
 271 extern int      close(int);
 272 extern void     closeall(void);
 273 extern ssize_t  read(int, void *, size_t);
 274 extern ssize_t  write(int, void *, size_t);
 275 extern struct   dirent *readdirfd(int);
 276
 277 extern void     srandom(u_long);
 278 extern u_long   random(void);
 279
 280 extern void     exit(int);
 281
 282 /* imports from stdlib, locally modified */
 283 extern long     strtol(const char *, char **, int);
 284 extern char     *optarg;                        /* getopt(3) external variables */
 285 extern int      optind, opterr, optopt, optreset;
 286 extern int      getopt(int, char * const [], const char *);
 287
 288 /* pager.c */
 289 extern void     pager_open(void);
 290 extern void     pager_close(void);
 291 extern int      pager_output(const char *);
 292 extern int      pager_file(const char *);
 293
 294 /* No signal state to preserve */
 295 #define setjmp  _setjmp
 296 #define longjmp _longjmp
 297
 298 /* environment.c */
 299 #define EV_DYNAMIC      (1<<0)          /* value was dynamically allocated, free if changed/unset */
 300 #define EV_VOLATILE     (1<<1)          /* value is volatile, make a copy of it */
 301 #define EV_NOHOOK       (1<<2)          /* don't call hook when setting */
 302
 303 struct env_var;
 304 typedef char    *(ev_format_t)(struct env_var *);
 305 typedef int     (ev_sethook_t)(struct env_var *, int, const void *);
 306 typedef int     (ev_unsethook_t)(struct env_var *);
 307
 308 struct env_var
 309 {
 310     char                *ev_name;
 311     int                 ev_flags;
 312     void                *ev_value;
 313     ev_sethook_t        *ev_sethook;
 314     ev_unsethook_t      *ev_unsethook;
 315     struct env_var      *ev_next, *ev_prev;
 316 };
 317 extern struct env_var   *environ;
 318
 319 extern struct env_var   *env_getenv(const char *);
 320 extern int              env_setenv(const char *, int, const void *, ev_sethook_t,
 321                                    ev_unsethook_t);
 322 extern char             *getenv(const char *);
 323 extern int              setenv(const char *, const char *, int);
 324 extern int              putenv(const char *);
 325 extern int              unsetenv(const char *);
 326
 327 extern ev_sethook_t     env_noset;              /* refuse set operation */
 328 extern ev_unsethook_t   env_nounset;            /* refuse unset operation */
 329
 330 /* BCD conversions (undocumented) */
 331 extern u_char const     bcd2bin_data[];
 332 extern u_char const     bin2bcd_data[];
 333 extern char const       hex2ascii_data[];
 334
 335 #define bcd2bin(bcd)    (bcd2bin_data[bcd])
 336 #define bin2bcd(bin)    (bin2bcd_data[bin])
 337 #define hex2ascii(hex)  (hex2ascii_data[hex])
 338
 339 /* min/max (undocumented) */
 340 static __inline int imax(int a, int b) { return (a > b ? a : b); }
 341 static __inline int imin(int a, int b) { return (a < b ? a : b); }
 342 static __inline long lmax(long a, long b) { return (a > b ? a : b); }
 343 static __inline long lmin(long a, long b) { return (a < b ? a : b); }
 344 static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
 345 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
 346 static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
 347 static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
 348 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
 349 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
 350 static __inline size_t szmax(size_t a, size_t b) { return (a > b ? a : b); }
 351 static __inline size_t szmin(size_t a, size_t b) { return (a < b ? a : b); }
 352
 353 /* swaps (undocumented, useful?) */
 354 #ifdef __i386__
 355 extern u_int32_t        bswap32(u_int32_t);
 356 extern u_int64_t        bswap64(u_int64_t);
 357 #endif
 358
 359 /* null functions for device/filesystem switches (undocumented) */
 360 extern int      nodev(void);
 361 extern int      noioctl(struct open_file *, u_long, void *);
 362 extern void     nullsys(void);
 363
 364 extern int      null_open(const char *, struct open_file *);
 365 extern int      null_close(struct open_file *);
 366 extern int      null_read(struct open_file *, void *, size_t, size_t *);
 367 extern int      null_write(struct open_file *, void *, size_t, size_t *);
 368 extern off_t    null_seek(struct open_file *, off_t, int);
 369 extern int      null_stat(struct open_file *, struct stat *);
 370 extern int      null_readdir(struct open_file *, struct dirent *);
 371
 372
 373 /*
 374  * Machine dependent functions and data, must be provided or stubbed by
 375  * the consumer
 376  */
 377 extern int              getchar(void);
 378 extern int              ischar(void);
 379 extern void             putchar(int);
 380 extern int              devopen(struct open_file *, const char *, const char **);
 381 extern int              devclose(struct open_file *);
 382 extern void             panic(const char *, ...) __dead2;
 383 extern struct fs_ops    *file_system[];
 384 extern struct devsw     *devsw[];
 385
 386 #if 0
 387
 388 static inline void *
 389 malloc_debug(size_t size, const char *file, int line)
 390 {
 391     void *p;
 392     printf("%s:%d malloc(%ld)", file, line, size);
 393     p = malloc(size);
 394     printf("=%p\n", p);
 395     return p;
 396 }
 397
 398 static inline void
 399 free_debug(void *p, const char *file, int line)
 400 {
 401     printf("%s:%d free(%p)\n", file, line, p);
 402     free(p);
 403 }
 404
 405 #define malloc(x)       malloc_debug(x, __FILE__, __LINE__)
 406 #define free(x)         free_debug(x, __FILE__, __LINE__)
 407
 408 #endif