usr/src/boot/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  * $FreeBSD$
  27  * From $NetBSD: stand.h,v 1.22 1997/06/26 19:17:40 drochner Exp $
  28  */
  29
  30 /*-
  31  * Copyright (c) 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)stand.h     8.1 (Berkeley) 6/11/93
  59  */
  60
  61 #ifndef STAND_H
  62 #define STAND_H
  63
  64 #include <sys/types.h>
  65 #include <sys/cdefs.h>
  66 #include <sys/stat.h>
  67 #include <sys/dirent.h>
  68
  69 /* this header intentionally exports NULL from <string.h> */
  70 #include <string.h>
  71
  72 #define CHK(fmt, args...)       printf("%s(%d): " fmt "\n", __func__, __LINE__ , ##args)
  73 #define PCHK(fmt, args...)      {printf("%s(%d): " fmt "\n", __func__, __LINE__ , ##args); getchar();}
  74
  75 /* Avoid unwanted userlandish components */
  76 #define _KERNEL
  77 #include <sys/errno.h>
  78 #undef _KERNEL
  79
  80 /* special stand error codes */
  81 #define EADAPT  (ELAST+1)       /* bad adaptor */
  82 #define ECTLR   (ELAST+2)       /* bad controller */
  83 #define EUNIT   (ELAST+3)       /* bad unit */
  84 #define ESLICE  (ELAST+4)       /* bad slice */
  85 #define EPART   (ELAST+5)       /* bad partition */
  86 #define ERDLAB  (ELAST+6)       /* can't read disk label */
  87 #define EUNLAB  (ELAST+7)       /* unlabeled disk */
  88 #define EOFFSET (ELAST+8)       /* relative seek not supported */
  89 #define ESALAST (ELAST+8)       /* */
  90
  91 struct open_file;
  92
  93 /*
  94  * This structure is used to define file system operations in a file system
  95  * independent way.
  96  *
  97  * XXX note that filesystem providers should export a pointer to their fs_ops
  98  *     struct, so that consumers can reference this and thus include the
  99  *     filesystems that they require.
 100  */
 101 struct fs_ops {
 102     const char  *fs_name;
 103     int         (*fo_open)(const char *path, struct open_file *f);
 104     int         (*fo_close)(struct open_file *f);
 105     int         (*fo_read)(struct open_file *f, void *buf,
 106                            size_t size, size_t *resid);
 107     int         (*fo_write)(struct open_file *f, void *buf,
 108                             size_t size, size_t *resid);
 109     off_t       (*fo_seek)(struct open_file *f, off_t offset, int where);
 110     int         (*fo_stat)(struct open_file *f, struct stat *sb);
 111     int         (*fo_readdir)(struct open_file *f, struct dirent *d);
 112 };
 113
 114 /*
 115  * libstand-supplied filesystems
 116  */
 117 extern struct fs_ops ufs_fsops;
 118 extern struct fs_ops tftp_fsops;
 119 extern struct fs_ops nfs_fsops;
 120 extern struct fs_ops cd9660_fsops;
 121 extern struct fs_ops nandfs_fsops;
 122 extern struct fs_ops gzipfs_fsops;
 123 extern struct fs_ops bzipfs_fsops;
 124 extern struct fs_ops dosfs_fsops;
 125 extern struct fs_ops ext2fs_fsops;
 126 extern struct fs_ops splitfs_fsops;
 127 extern struct fs_ops pkgfs_fsops;
 128
 129 /* where values for lseek(2) */
 130 #define SEEK_SET        0       /* set file offset to offset */
 131 #define SEEK_CUR        1       /* set file offset to current plus offset */
 132 #define SEEK_END        2       /* set file offset to EOF plus offset */
 133
 134 /*
 135  * Device switch
 136  */
 137 struct devsw {
 138     const char  dv_name[8];
 139     int         dv_type;                /* opaque type constant, arch-dependant */
 140     int         (*dv_init)(void);       /* early probe call */
 141     int         (*dv_strategy)(void *devdata, int rw, daddr_t blk,
 142                         size_t size, char *buf, size_t *rsize);
 143     int         (*dv_open)(struct open_file *f, ...);
 144     int         (*dv_close)(struct open_file *f);
 145     int         (*dv_ioctl)(struct open_file *f, u_long cmd, void *data);
 146     int         (*dv_print)(int verbose);       /* print device information */
 147     void        (*dv_cleanup)(void);
 148 };
 149
 150 /*
 151  * libstand-supplied device switch
 152  */
 153 extern struct devsw netdev;
 154
 155 extern int errno;
 156
 157 /*
 158  * Generic device specifier; architecture-dependent
 159  * versions may be larger, but should be allowed to
 160  * overlap.
 161  */
 162 struct devdesc
 163 {
 164     struct devsw        *d_dev;
 165     int                 d_type;
 166 #define DEVT_NONE       0
 167 #define DEVT_DISK       1
 168 #define DEVT_NET        2
 169 #define DEVT_CD         3
 170 #define DEVT_ZFS        4
 171     int                 d_unit;
 172     void                *d_opendata;
 173 };
 174
 175 struct open_file {
 176     int                 f_flags;        /* see F_* below */
 177     struct devsw        *f_dev;         /* pointer to device operations */
 178     void                *f_devdata;     /* device specific data */
 179     struct fs_ops       *f_ops;         /* pointer to file system operations */
 180     void                *f_fsdata;      /* file system specific data */
 181     off_t               f_offset;       /* current file offset */
 182     char                *f_rabuf;       /* readahead buffer pointer */
 183     size_t              f_ralen;        /* valid data in readahead buffer */
 184     off_t               f_raoffset;     /* consumer offset in readahead buffer */
 185 #define SOPEN_RASIZE    512
 186 };
 187
 188 #define SOPEN_MAX       64
 189 extern struct open_file files[];
 190
 191 /* f_flags values */
 192 #define F_READ          0x0001  /* file opened for reading */
 193 #define F_WRITE         0x0002  /* file opened for writing */
 194 #define F_RAW           0x0004  /* raw device open - no file system */
 195 #define F_NODEV         0x0008  /* network open - no device */
 196 #define F_GZIP          0x0010  /* file is compressed by gzip */
 197 #define F_BZIP          0x0020  /* file is compressed by bzip */
 198 #define F_MASK          0xFFFF
 199 /* Mode modifier for strategy() */
 200 #define F_NORA          (0x01 << 16)    /* Disable Read-Ahead */
 201
 202 #define isascii(c)      (((c) & ~0x7F) == 0)
 203
 204 static __inline int isupper(int c)
 205 {
 206     return c >= 'A' && c <= 'Z';
 207 }
 208
 209 static __inline int islower(int c)
 210 {
 211     return c >= 'a' && c <= 'z';
 212 }
 213
 214 static __inline int isspace(int c)
 215 {
 216     return c == ' ' || (c >= 0x9 && c <= 0xd);
 217 }
 218
 219 static __inline int isdigit(int c)
 220 {
 221     return c >= '0' && c <= '9';
 222 }
 223
 224 static __inline int isxdigit(int c)
 225 {
 226     return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
 227 }
 228
 229 static __inline int isalpha(int c)
 230 {
 231     return isupper(c) || islower(c);
 232 }
 233
 234 static __inline int isalnum(int c)
 235 {
 236     return isalpha(c) || isdigit(c);
 237 }
 238
 239 static __inline int toupper(int c)
 240 {
 241     return islower(c) ? c - 'a' + 'A' : c;
 242 }
 243
 244 static __inline int tolower(int c)
 245 {
 246     return isupper(c) ? c - 'A' + 'a' : c;
 247 }
 248
 249 /* sbrk emulation */
 250 extern void     setheap(void *base, void *top);
 251 extern char     *sbrk(int incr);
 252
 253 /* Matt Dillon's zalloc/zmalloc */
 254 extern void     *malloc(size_t bytes);
 255 extern void     free(void *ptr);
 256 /*#define free(p)       {CHK("free %p", p); free(p);} */ /* use for catching guard violations */
 257 extern void     *calloc(size_t n1, size_t n2);
 258 extern void     *realloc(void *ptr, size_t size);
 259 extern void     *reallocf(void *ptr, size_t size);
 260 extern void     mallocstats(void);
 261
 262 extern int      printf(const char *fmt, ...) __printflike(1, 2);
 263 extern void     vprintf(const char *fmt, __va_list);
 264 extern int      asprintf(char **buf, const char *cfmt, ...) __printflike(2, 3);
 265 extern int      sprintf(char *buf, const char *cfmt, ...) __printflike(2, 3);
 266 extern int      snprintf(char *buf, size_t size, const char *cfmt, ...) __printflike(3, 4);
 267 extern void     vsprintf(char *buf, const char *cfmt, __va_list);
 268 extern void     vsnprintf(char *buf, size_t size, const char *cfmt, __va_list);
 269
 270 extern void     twiddle(u_int callerdiv);
 271 extern void     twiddle_divisor(u_int globaldiv);
 272
 273 extern void     ngets(char *, int);
 274 #define gets(x) ngets((x), 0)
 275 extern int      fgetstr(char *buf, int size, int fd);
 276
 277 extern int      open(const char *, int);
 278 #define O_RDONLY        0x0
 279 #define O_WRONLY        0x1
 280 #define O_RDWR          0x2
 281 extern int      close(int);
 282 extern void     closeall(void);
 283 extern ssize_t  read(int, void *, size_t);
 284 extern ssize_t  write(int, void *, size_t);
 285 extern struct   dirent *readdirfd(int);
 286
 287 extern void     srandom(u_long seed);
 288 extern u_long   random(void);
 289
 290 /* imports from stdlib, locally modified */
 291 extern long     strtol(const char *, char **, int);
 292 extern unsigned long    strtoul(const char *, char **, int);
 293 extern char     *optarg;                        /* getopt(3) external variables */
 294 extern int      optind, opterr, optopt, optreset;
 295 extern int      getopt(int, char * const [], const char *);
 296
 297 /* pager.c */
 298 extern void     pager_open(void);
 299 extern void     pager_close(void);
 300 extern int      pager_output(const char *lines);
 301 extern int      pager_file(const char *fname);
 302
 303 /* No signal state to preserve */
 304 #define setjmp  _setjmp
 305 #define longjmp _longjmp
 306
 307 /* environment.c */
 308 #define EV_DYNAMIC      (1<<0)          /* value was dynamically allocated, free if changed/unset */
 309 #define EV_VOLATILE     (1<<1)          /* value is volatile, make a copy of it */
 310 #define EV_NOHOOK       (1<<2)          /* don't call hook when setting */
 311
 312 struct env_var;
 313 typedef char    *(ev_format_t)(struct env_var *ev);
 314 typedef int     (ev_sethook_t)(struct env_var *ev, int flags,
 315                     const void *value);
 316 typedef int     (ev_unsethook_t)(struct env_var *ev);
 317
 318 struct env_var
 319 {
 320     char                *ev_name;
 321     int                 ev_flags;
 322     void                *ev_value;
 323     ev_sethook_t        *ev_sethook;
 324     ev_unsethook_t      *ev_unsethook;
 325     struct env_var      *ev_next, *ev_prev;
 326 };
 327 extern struct env_var   *environ;
 328
 329 extern struct env_var   *env_getenv(const char *name);
 330 extern int              env_setenv(const char *name, int flags,
 331                                    const void *value, ev_sethook_t sethook,
 332                                    ev_unsethook_t unsethook);
 333 extern char             *getenv(const char *name);
 334 extern int              setenv(const char *name, const char *value,
 335                                int overwrite);
 336 extern int              putenv(const char *string);
 337 extern int              unsetenv(const char *name);
 338
 339 extern ev_sethook_t     env_noset;              /* refuse set operation */
 340 extern ev_unsethook_t   env_nounset;            /* refuse unset operation */
 341
 342 /* BCD conversions (undocumented) */
 343 extern u_char const     bcd2bin_data[];
 344 extern u_char const     bin2bcd_data[];
 345 extern char const       hex2ascii_data[];
 346
 347 #define bcd2bin(bcd)    (bcd2bin_data[bcd])
 348 #define bin2bcd(bin)    (bin2bcd_data[bin])
 349 #define hex2ascii(hex)  (hex2ascii_data[hex])
 350
 351 /* min/max (undocumented) */
 352 static __inline int imax(int a, int b) { return (a > b ? a : b); }
 353 static __inline int imin(int a, int b) { return (a < b ? a : b); }
 354 static __inline long lmax(long a, long b) { return (a > b ? a : b); }
 355 static __inline long lmin(long a, long b) { return (a < b ? a : b); }
 356 static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
 357 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
 358 static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
 359 static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
 360 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
 361 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
 362
 363 /* null functions for device/filesystem switches (undocumented) */
 364 extern int      nodev(void);
 365 extern int      noioctl(struct open_file *, u_long, void *);
 366 extern void     nullsys(void);
 367
 368 extern int      null_open(const char *path, struct open_file *f);
 369 extern int      null_close(struct open_file *f);
 370 extern int      null_read(struct open_file *f, void *buf, size_t size, size_t *resid);
 371 extern int      null_write(struct open_file *f, void *buf, size_t size, size_t *resid);
 372 extern off_t    null_seek(struct open_file *f, off_t offset, int where);
 373 extern int      null_stat(struct open_file *f, struct stat *sb);
 374 extern int      null_readdir(struct open_file *f, struct dirent *d);
 375
 376
 377 /*
 378  * Machine dependent functions and data, must be provided or stubbed by
 379  * the consumer
 380  */
 381 extern int              getchar(void);
 382 extern int              ischar(void);
 383 extern void             putchar(int);
 384 extern int              devopen(struct open_file *, const char *, const char **);
 385 extern int              devclose(struct open_file *f);
 386 extern void             panic(const char *, ...) __dead2 __printflike(1, 2);
 387 extern struct fs_ops    *file_system[];
 388 extern struct fs_ops    *exclusive_file_system;
 389 extern struct devsw     *devsw[];
 390
 391 /*
 392  * Expose byteorder(3) functions.
 393  */
 394 #ifndef _BYTEORDER_PROTOTYPED
 395 #define _BYTEORDER_PROTOTYPED
 396 extern uint32_t         htonl(uint32_t);
 397 extern uint16_t         htons(uint16_t);
 398 extern uint32_t         ntohl(uint32_t);
 399 extern uint16_t         ntohs(uint16_t);
 400 #endif
 401
 402 #ifndef _BYTEORDER_FUNC_DEFINED
 403 #define _BYTEORDER_FUNC_DEFINED
 404 #define htonl(x)        __htonl(x)
 405 #define htons(x)        __htons(x)
 406 #define ntohl(x)        __ntohl(x)
 407 #define ntohs(x)        __ntohs(x)
 408 #endif
 409
 410 void *Malloc(size_t, const char *, int);
 411 void *Calloc(size_t, size_t, const char *, int);
 412 void *Realloc(void *, size_t, const char *, int);
 413 void Free(void *, const char *, int);
 414
 415 #if 1
 416 #define malloc(x)       Malloc(x, __FILE__, __LINE__)
 417 #define calloc(x, y)    Calloc(x, y, __FILE__, __LINE__)
 418 #define free(x)         Free(x, __FILE__, __LINE__)
 419 #define realloc(x, y)   Realloc(x, y, __FILE__, __LINE__)
 420 #else
 421 #define malloc(x)       Malloc(x, NULL, 0)
 422 #define calloc(x, y)    Calloc(x, y, NULL, 0)
 423 #define free(x)         Free(x, NULL, 0)
 424 #define realloc(x, y)   Realloc(x, y, NULL, 0)
 425 #endif
 426
 427 #endif  /* STAND_H */