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  * 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  * 3. 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 <machine/stdarg.h>     /* __va_list */
  65 #include <sys/types.h>
  66 #include <sys/cdefs.h>
  67 #include <sys/stat.h>
  68 #include <sys/dirent.h>
  69 #include <string.h>
  70
  71 #define CHK(fmt, args...)       printf("%s(%d): " fmt "\n", __func__, __LINE__ , ##args)
  72 #define PCHK(fmt, args...)      {printf("%s(%d): " fmt "\n", __func__, __LINE__ , ##args); getchar();}
  73
  74 /* Avoid unwanted userlandish components */
  75 #define _KERNEL
  76 #include <sys/errno.h>
  77 #undef _KERNEL
  78
  79 /* special stand error codes */
  80 #define EADAPT  (ELAST+1)       /* bad adaptor */
  81 #define ECTLR   (ELAST+2)       /* bad controller */
  82 #define EUNIT   (ELAST+3)       /* bad unit */
  83 #define ESLICE  (ELAST+4)       /* bad slice */
  84 #define EPART   (ELAST+5)       /* bad partition */
  85 #define ERDLAB  (ELAST+6)       /* can't read disk label */
  86 #define EUNLAB  (ELAST+7)       /* unlabeled disk */
  87 #define EOFFSET (ELAST+8)       /* relative seek not supported */
  88 #define ESALAST (ELAST+8)       /* */
  89
  90 struct open_file;
  91
  92 /*
  93  * This structure is used to define file system operations in a file system
  94  * independent way.
  95  *
  96  * XXX note that filesystem providers should export a pointer to their fs_ops
  97  *     struct, so that consumers can reference this and thus include the
  98  *     filesystems that they require.
  99  */
 100 struct fs_ops {
 101     const char  *fs_name;
 102     int         (*fo_open)(const char *, struct open_file *);
 103     int         (*fo_close)(struct open_file *);
 104     int         (*fo_read)(struct open_file *, void *,
 105                            size_t, size_t *);
 106     int         (*fo_write)(struct open_file *, void *,
 107                             size_t, size_t *);
 108     off_t       (*fo_seek)(struct open_file *, off_t, int);
 109     int         (*fo_stat)(struct open_file *, struct stat *);
 110     int         (*fo_readdir)(struct open_file *, struct dirent *);
 111 };
 112
 113 /*
 114  * libstand-supplied filesystems
 115  */
 116 extern struct fs_ops ufs_fsops;
 117 extern struct fs_ops hammer_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 gzipfs_fsops;
 122 extern struct fs_ops zipfs_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
 128 /* where values for lseek(2) */
 129 #define SEEK_SET        0       /* set file offset to offset */
 130 #define SEEK_CUR        1       /* set file offset to current plus offset */
 131 #define SEEK_END        2       /* set file offset to EOF plus offset */
 132
 133 /*
 134  * Device switch
 135  */
 136 struct devsw {
 137     const char  dv_name[8];
 138     int         dv_type;                /* opaque type constant, arch-dependant */
 139     int         (*dv_init)(void);       /* early probe call */
 140     int         (*dv_strategy)(void *, int, daddr_t, size_t, char *, size_t *);
 141     int         (*dv_open)(struct open_file *, ...);
 142     int         (*dv_close)(struct open_file *);
 143     int         (*dv_ioctl)(struct open_file *, u_long, void *);
 144     void        (*dv_print)(int);       /* print device information */
 145     void        (*dv_cleanup)(void);
 146 };
 147
 148 /*
 149  * libstand-supplied device switch
 150  */
 151 extern struct devsw netdev;
 152
 153 extern int errno;
 154 extern int no_io_error;
 155
 156 struct open_file {
 157     int                 f_flags;        /* see F_* below */
 158     struct devsw        *f_dev;         /* pointer to device operations */
 159     void                *f_devdata;     /* device specific data */
 160     struct fs_ops       *f_ops;         /* pointer to file system operations */
 161     void                *f_fsdata;      /* file system specific data */
 162     off_t               f_offset;       /* current file offset */
 163     char                *f_rabuf;       /* readahead buffer pointer */
 164     size_t              f_ralen;        /* valid data in readahead buffer */
 165     off_t               f_raoffset;     /* consumer offset in readahead buffer */
 166 #define SOPEN_RASIZE    512
 167 };
 168
 169 #define SOPEN_MAX       8
 170 extern struct open_file files[];
 171
 172 /* f_flags values */
 173 #define F_READ          0x0001  /* file opened for reading */
 174 #define F_WRITE         0x0002  /* file opened for writing */
 175 #define F_RAW           0x0004  /* raw device open - no file system */
 176 #define F_DEVDESC       0x0008  /* generic devdesc, else specific */
 177
 178 #define isascii(c)      (((c) & ~0x7F) == 0)
 179
 180 static __inline int
 181 isupper(int c)
 182 {
 183     return c >= 'A' && c <= 'Z';
 184 }
 185
 186 static __inline int
 187 islower(int c)
 188 {
 189     return c >= 'a' && c <= 'z';
 190 }
 191
 192 static __inline int
 193 isspace(int c)
 194 {
 195     return c == ' ' || (c >= 0x9 && c <= 0xd);
 196 }
 197
 198 static __inline int
 199 isdigit(int c)
 200 {
 201     return c >= '0' && c <= '9';
 202 }
 203
 204 static __inline int
 205 isxdigit(int c)
 206 {
 207     return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
 208 }
 209
 210 static __inline int
 211 isalpha(int c)
 212 {
 213     return isupper(c) || islower(c);
 214 }
 215
 216 static __inline int
 217 isalnum(int c)
 218 {
 219     return isalpha(c) || isdigit(c);
 220 }
 221
 222 static __inline int
 223 toupper(int c)
 224 {
 225     return islower(c) ? c - 'a' + 'A' : c;
 226 }
 227
 228 static __inline int
 229 tolower(int c)
 230 {
 231     return isupper(c) ? c - 'A' + 'a' : c;
 232 }
 233
 234 /* sbrk emulation */
 235 extern void     setheap(void *, void *);
 236 extern char     *getheap(size_t *sizep);
 237 extern char     *sbrk(intptr_t);
 238
 239 /* Matt Dillon's zalloc/zmalloc */
 240 extern void     *malloc(size_t);
 241 extern void     free(void *);
 242 /*#define free(p)       {CHK("free %p", p); free(p);} */ /* use for catching guard violations */
 243 extern void     *calloc(size_t, size_t);
 244 extern void     *realloc(void *, size_t);
 245 extern void     *reallocf(void *, size_t);
 246 extern void     mallocstats(void);
 247
 248 extern int      printf(const char *, ...) __printflike(1, 2);
 249 extern void     vprintf(const char *, __va_list) __printflike(1, 0);
 250 extern int      sprintf(char *, const char *, ...) __printflike(2, 3);
 251 extern void     vsprintf(char *, const char *, __va_list) __printflike(2, 0);
 252 int             snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
 253 int             vsnprintf(char *, size_t, const char *, __va_list)
 254                     __printflike(3, 0);
 255
 256 extern void     twiddle(void);
 257
 258 extern void     ngets(char *, int);
 259 #define gets(x) ngets((x), 0)
 260 extern char     *fgets(char *, int, int);
 261 extern int      fgetstr(char *, int, int);
 262
 263 extern int      open(const char *, int);
 264 #define O_RDONLY        0x0
 265 #define O_WRONLY        0x1                     /* writing not (yet?) supported */
 266 #define O_RDWR          0x2
 267 extern int      close(int);
 268 extern void     closeall(void);
 269 extern off_t    lseek(int, off_t, int);
 270 extern ssize_t  read(int, void *, size_t);
 271 extern ssize_t  write(int, void *, size_t);
 272 extern struct   dirent *readdirfd(int);
 273
 274 extern void     srandom(u_long);
 275 extern u_long   random(void);
 276
 277 /* imports from stdlib, locally modified */
 278 extern long     strtol(const char *, char **, int);
 279 extern unsigned long strtoul(const char *, char **, int);
 280 extern char     *optarg;                        /* getopt(3) external variables */
 281 extern int      optind, opterr, optopt, optreset;
 282 extern int      getopt(int, char * const [], const char *);
 283
 284 /* ether.c */
 285 extern char    *ether_sprintf(u_char *);
 286
 287 /* pager.c */
 288 extern void     pager_open(void);
 289 extern void     pager_close(void);
 290 extern int      pager_output(const char *);
 291 extern int      pager_file(const char *);
 292
 293 /* No signal state to preserve */
 294 #define setjmp  _setjmp
 295 #define longjmp _longjmp
 296
 297 /* environment.c */
 298 #define EV_DYNAMIC      (1<<0)          /* value was dynamically allocated, free if changed/unset */
 299 #define EV_VOLATILE     (1<<1)          /* value is volatile, make a copy of it */
 300 #define EV_NOHOOK       (1<<2)          /* don't call hook when setting */
 301
 302 struct env_var;
 303 typedef char    *(ev_format_t)(struct env_var *);
 304 typedef int     (ev_sethook_t)(struct env_var *, int, const void *);
 305 typedef int     (ev_unsethook_t)(struct env_var *);
 306
 307 struct env_var
 308 {
 309     char                *ev_name;
 310     int                 ev_flags;
 311     void                *ev_value;
 312     ev_sethook_t        *ev_sethook;
 313     ev_unsethook_t      *ev_unsethook;
 314     struct env_var      *ev_next, *ev_prev;
 315 };
 316 extern struct env_var   *environ;
 317
 318 extern struct env_var   *env_getenv(const char *);
 319 extern int              env_setenv(const char *, int, const void *, ev_sethook_t,
 320                                    ev_unsethook_t);
 321 extern char             *getenv(const char *);
 322 extern int              setenv(const char *, const char *, int);
 323 extern int              putenv(const char *);
 324 extern int              unsetenv(const char *);
 325
 326 extern ev_sethook_t     env_noset;              /* refuse set operation */
 327 extern ev_unsethook_t   env_nounset;            /* refuse unset operation */
 328
 329 /* BCD conversions (undocumented) */
 330 extern u_char const     bcd2bin_data[];
 331 extern u_char const     bin2bcd_data[];
 332 extern char const       hex2ascii_data[];
 333
 334 #define bcd2bin(bcd)    (bcd2bin_data[bcd])
 335 #define bin2bcd(bin)    (bin2bcd_data[bin])
 336 #define hex2ascii(hex)  (hex2ascii_data[hex])
 337
 338 /* min/max (undocumented) */
 339 static __inline int imax(int a, int b) { return (a > b ? a : b); }
 340 static __inline int imin(int a, int b) { return (a < b ? a : b); }
 341 static __inline long lmax(long a, long b) { return (a > b ? a : b); }
 342 static __inline long lmin(long a, long b) { return (a < b ? a : b); }
 343 static __inline u_int max(u_int a, u_int b) { return (a > b ? a : b); }
 344 static __inline u_int min(u_int a, u_int b) { return (a < b ? a : b); }
 345 static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
 346 static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
 347 static __inline u_long ulmax(u_long a, u_long b) { return (a > b ? a : b); }
 348 static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
 349 static __inline size_t szmax(size_t a, size_t b) { return (a > b ? a : b); }
 350 static __inline size_t szmin(size_t a, size_t b) { return (a < b ? a : b); }
 351
 352 /* swaps (undocumented, useful?) */
 353 #ifdef __i386__
 354 extern u_int32_t        bswap32(u_int32_t);
 355 extern u_int64_t        bswap64(u_int64_t);
 356 #endif
 357
 358 /* null functions for device/filesystem switches (undocumented) */
 359 extern int      nodev(void);
 360 extern int      noioctl(struct open_file *, u_long, void *);
 361 extern void     nullsys(void);
 362
 363 extern int      null_open(const char *, struct open_file *);
 364 extern int      null_close(struct open_file *);
 365 extern int      null_read(struct open_file *, void *, size_t, size_t *);
 366 extern int      null_write(struct open_file *, void *, size_t, size_t *);
 367 extern off_t    null_seek(struct open_file *, off_t, int);
 368 extern int      null_stat(struct open_file *, struct stat *);
 369 extern int      null_readdir(struct open_file *, struct dirent *);
 370
 371
 372 /*
 373  * Machine dependent functions and data, must be provided or stubbed by
 374  * the consumer
 375  */
 376 extern int              getchar(void);
 377 extern int              ischar(void);
 378 extern void             putchar(int);
 379 extern int              devopen(struct open_file *, const char *, const char **);
 380 extern int              devclose(struct open_file *);
 381 extern void             devreplace(struct open_file *, void *devdata);
 382 extern void             panic(const char *, ...) __dead2 __printflike(1, 2);
 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
 409
 410 #endif  /* !_STAND_H_ */