contrib/file/src/file.h

   1 /*
   2  * Copyright (c) Ian F. Darwin 1986-1995.
   3  * Software written by Ian F. Darwin and others;
   4  * maintained 1995-present by Christos Zoulas and others.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice immediately at the beginning of the file, without modification,
  11  *    this list of conditions, and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28 /*
  29  * file.h - definitions for file(1) program
  30  * @(#)$File: file.h,v 1.208 2019/06/26 20:31:31 christos Exp $
  31  */
  32
  33 #ifndef __file_h__
  34 #define __file_h__
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include <config.h>
  38 #endif
  39 #ifdef HAVE_STDINT_H
  40 #ifndef __STDC_LIMIT_MACROS
  41 #define __STDC_LIMIT_MACROS
  42 #endif
  43 #ifndef __STDC_FORMAT_MACROS
  44 #define __STDC_FORMAT_MACROS
  45 #endif
  46
  47 #ifdef WIN32
  48   #ifdef _WIN64
  49     #define SIZE_T_FORMAT "I64"
  50   #else
  51     #define SIZE_T_FORMAT ""
  52   #endif
  53   #define INT64_T_FORMAT "I64"
  54   #define INTMAX_T_FORMAT "I64"
  55 #else
  56   #define SIZE_T_FORMAT "z"
  57   #define INT64_T_FORMAT "ll"
  58   #define INTMAX_T_FORMAT "j"
  59 #endif
  60 #include <stdint.h>
  61 #endif
  62
  63 #include <stdio.h>      /* Include that here, to make sure __P gets defined */
  64 #include <errno.h>
  65 #include <fcntl.h>      /* For open and flags */
  66 #ifdef HAVE_INTTYPES_H
  67 #include <inttypes.h>
  68 #endif
  69 #include <regex.h>
  70 #include <time.h>
  71 #include <sys/types.h>
  72 #ifndef WIN32
  73 #include <sys/param.h>
  74 #endif
  75 /* Do this here and now, because struct stat gets re-defined on solaris */
  76 #include <sys/stat.h>
  77 #include <stdarg.h>
  78
  79 #define ENABLE_CONDITIONALS
  80
  81 #ifndef MAGIC
  82 #define MAGIC "/etc/magic"
  83 #endif
  84
  85 #if defined(__EMX__) || defined (WIN32)
  86 #define PATHSEP ';'
  87 #else
  88 #define PATHSEP ':'
  89 #endif
  90
  91 #define private static
  92
  93 #if HAVE_VISIBILITY && !defined(WIN32)
  94 #define public  __attribute__ ((__visibility__("default")))
  95 #ifndef protected
  96 #define protected __attribute__ ((__visibility__("hidden")))
  97 #endif
  98 #else
  99 #define public
 100 #ifndef protected
 101 #define protected
 102 #endif
 103 #endif
 104
 105 #ifndef __arraycount
 106 #define __arraycount(a) (sizeof(a) / sizeof(a[0]))
 107 #endif
 108
 109 #ifndef __GNUC_PREREQ__
 110 #ifdef __GNUC__
 111 #define __GNUC_PREREQ__(x, y)                                           \
 112         ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) ||                  \
 113          (__GNUC__ > (x)))
 114 #else
 115 #define __GNUC_PREREQ__(x, y)   0
 116 #endif
 117 #endif
 118
 119 #ifndef __GNUC__
 120 #ifndef __attribute__
 121 #define __attribute__(a)
 122 #endif
 123 #endif
 124
 125 #ifndef MIN
 126 #define MIN(a,b)        (((a) < (b)) ? (a) : (b))
 127 #endif
 128
 129 #ifndef MAX
 130 #define MAX(a,b)        (((a) > (b)) ? (a) : (b))
 131 #endif
 132
 133 #ifndef FILE_BYTES_MAX
 134 # define FILE_BYTES_MAX (1024 * 1024)   /* how much of the file to look at */
 135 #endif
 136 #define MAXMAGIS 8192           /* max entries in any one magic file
 137                                    or directory */
 138 #define MAXDESC 64              /* max len of text description/MIME type */
 139 #define MAXMIME 80              /* max len of text MIME type */
 140 #define MAXstring 96            /* max len of "string" types */
 141
 142 #define MAGICNO         0xF11E041C
 143 #define VERSIONNO       14
 144 #define FILE_MAGICSIZE  344
 145
 146 #define FILE_LOAD       0
 147 #define FILE_CHECK      1
 148 #define FILE_COMPILE    2
 149 #define FILE_LIST       3
 150
 151 struct buffer {
 152         int fd;
 153         struct stat st;
 154         const void *fbuf;
 155         size_t flen;
 156         off_t eoff;
 157         void *ebuf;
 158         size_t elen;
 159 };
 160
 161 union VALUETYPE {
 162         uint8_t b;
 163         uint16_t h;
 164         uint32_t l;
 165         uint64_t q;
 166         uint8_t hs[2];  /* 2 bytes of a fixed-endian "short" */
 167         uint8_t hl[4];  /* 4 bytes of a fixed-endian "long" */
 168         uint8_t hq[8];  /* 8 bytes of a fixed-endian "quad" */
 169         char s[MAXstring];      /* the search string or regex pattern */
 170         unsigned char us[MAXstring];
 171         float f;
 172         double d;
 173 };
 174
 175 struct magic {
 176         /* Word 1 */
 177         uint16_t cont_level;    /* level of ">" */
 178         uint8_t flag;
 179 #define INDIR           0x01    /* if '(...)' appears */
 180 #define OFFADD          0x02    /* if '>&' or '>...(&' appears */
 181 #define INDIROFFADD     0x04    /* if '>&(' appears */
 182 #define UNSIGNED        0x08    /* comparison is unsigned */
 183 #define NOSPACE         0x10    /* suppress space character before output */
 184 #define BINTEST         0x20    /* test is for a binary type (set only
 185                                    for top-level tests) */
 186 #define TEXTTEST        0x40    /* for passing to file_softmagic */
 187
 188         uint8_t factor;
 189
 190         /* Word 2 */
 191         uint8_t reln;           /* relation (0=eq, '>'=gt, etc) */
 192         uint8_t vallen;         /* length of string value, if any */
 193         uint8_t type;           /* comparison type (FILE_*) */
 194         uint8_t in_type;        /* type of indirection */
 195 #define                         FILE_INVALID    0
 196 #define                         FILE_BYTE       1
 197 #define                         FILE_SHORT      2
 198 #define                         FILE_DEFAULT    3
 199 #define                         FILE_LONG       4
 200 #define                         FILE_STRING     5
 201 #define                         FILE_DATE       6
 202 #define                         FILE_BESHORT    7
 203 #define                         FILE_BELONG     8
 204 #define                         FILE_BEDATE     9
 205 #define                         FILE_LESHORT    10
 206 #define                         FILE_LELONG     11
 207 #define                         FILE_LEDATE     12
 208 #define                         FILE_PSTRING    13
 209 #define                         FILE_LDATE      14
 210 #define                         FILE_BELDATE    15
 211 #define                         FILE_LELDATE    16
 212 #define                         FILE_REGEX      17
 213 #define                         FILE_BESTRING16 18
 214 #define                         FILE_LESTRING16 19
 215 #define                         FILE_SEARCH     20
 216 #define                         FILE_MEDATE     21
 217 #define                         FILE_MELDATE    22
 218 #define                         FILE_MELONG     23
 219 #define                         FILE_QUAD       24
 220 #define                         FILE_LEQUAD     25
 221 #define                         FILE_BEQUAD     26
 222 #define                         FILE_QDATE      27
 223 #define                         FILE_LEQDATE    28
 224 #define                         FILE_BEQDATE    29
 225 #define                         FILE_QLDATE     30
 226 #define                         FILE_LEQLDATE   31
 227 #define                         FILE_BEQLDATE   32
 228 #define                         FILE_FLOAT      33
 229 #define                         FILE_BEFLOAT    34
 230 #define                         FILE_LEFLOAT    35
 231 #define                         FILE_DOUBLE     36
 232 #define                         FILE_BEDOUBLE   37
 233 #define                         FILE_LEDOUBLE   38
 234 #define                         FILE_BEID3      39
 235 #define                         FILE_LEID3      40
 236 #define                         FILE_INDIRECT   41
 237 #define                         FILE_QWDATE     42
 238 #define                         FILE_LEQWDATE   43
 239 #define                         FILE_BEQWDATE   44
 240 #define                         FILE_NAME       45
 241 #define                         FILE_USE        46
 242 #define                         FILE_CLEAR      47
 243 #define                         FILE_DER        48
 244 #define                         FILE_NAMES_SIZE 49 /* size of array to contain all names */
 245
 246 #define IS_STRING(t) \
 247         ((t) == FILE_STRING || \
 248          (t) == FILE_PSTRING || \
 249          (t) == FILE_BESTRING16 || \
 250          (t) == FILE_LESTRING16 || \
 251          (t) == FILE_REGEX || \
 252          (t) == FILE_SEARCH || \
 253          (t) == FILE_INDIRECT || \
 254          (t) == FILE_NAME || \
 255          (t) == FILE_USE)
 256
 257 #define FILE_FMT_NONE 0
 258 #define FILE_FMT_NUM  1 /* "cduxXi" */
 259 #define FILE_FMT_STR  2 /* "s" */
 260 #define FILE_FMT_QUAD 3 /* "ll" */
 261 #define FILE_FMT_FLOAT 4 /* "eEfFgG" */
 262 #define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
 263
 264         /* Word 3 */
 265         uint8_t in_op;          /* operator for indirection */
 266         uint8_t mask_op;        /* operator for mask */
 267 #ifdef ENABLE_CONDITIONALS
 268         uint8_t cond;           /* conditional type */
 269 #else
 270         uint8_t dummy;
 271 #endif
 272         uint8_t factor_op;
 273 #define         FILE_FACTOR_OP_PLUS     '+'
 274 #define         FILE_FACTOR_OP_MINUS    '-'
 275 #define         FILE_FACTOR_OP_TIMES    '*'
 276 #define         FILE_FACTOR_OP_DIV      '/'
 277 #define         FILE_FACTOR_OP_NONE     '\0'
 278
 279 #define                         FILE_OPS        "&|^+-*/%"
 280 #define                         FILE_OPAND      0
 281 #define                         FILE_OPOR       1
 282 #define                         FILE_OPXOR      2
 283 #define                         FILE_OPADD      3
 284 #define                         FILE_OPMINUS    4
 285 #define                         FILE_OPMULTIPLY 5
 286 #define                         FILE_OPDIVIDE   6
 287 #define                         FILE_OPMODULO   7
 288 #define                         FILE_OPS_MASK   0x07 /* mask for above ops */
 289 #define                         FILE_UNUSED_1   0x08
 290 #define                         FILE_UNUSED_2   0x10
 291 #define                         FILE_OPSIGNED   0x20
 292 #define                         FILE_OPINVERSE  0x40
 293 #define                         FILE_OPINDIRECT 0x80
 294
 295 #ifdef ENABLE_CONDITIONALS
 296 #define                         COND_NONE       0
 297 #define                         COND_IF         1
 298 #define                         COND_ELIF       2
 299 #define                         COND_ELSE       3
 300 #endif /* ENABLE_CONDITIONALS */
 301
 302         /* Word 4 */
 303         int32_t offset;         /* offset to magic number */
 304         /* Word 5 */
 305         int32_t in_offset;      /* offset from indirection */
 306         /* Word 6 */
 307         uint32_t lineno;        /* line number in magic file */
 308         /* Word 7,8 */
 309         union {
 310                 uint64_t _mask; /* for use with numeric and date types */
 311                 struct {
 312                         uint32_t _count;        /* repeat/line count */
 313                         uint32_t _flags;        /* modifier flags */
 314                 } _s;           /* for use with string types */
 315         } _u;
 316 #define num_mask _u._mask
 317 #define str_range _u._s._count
 318 #define str_flags _u._s._flags
 319         /* Words 9-24 */
 320         union VALUETYPE value;  /* either number or string */
 321         /* Words 25-40 */
 322         char desc[MAXDESC];     /* description */
 323         /* Words 41-60 */
 324         char mimetype[MAXMIME]; /* MIME type */
 325         /* Words 61-62 */
 326         char apple[8];          /* APPLE CREATOR/TYPE */
 327         /* Words 63-78 */
 328         char ext[64];           /* Popular extensions */
 329 };
 330
 331 #define BIT(A)   (1 << (A))
 332 #define STRING_COMPACT_WHITESPACE               BIT(0)
 333 #define STRING_COMPACT_OPTIONAL_WHITESPACE      BIT(1)
 334 #define STRING_IGNORE_LOWERCASE                 BIT(2)
 335 #define STRING_IGNORE_UPPERCASE                 BIT(3)
 336 #define REGEX_OFFSET_START                      BIT(4)
 337 #define STRING_TEXTTEST                         BIT(5)
 338 #define STRING_BINTEST                          BIT(6)
 339 #define PSTRING_1_BE                            BIT(7)
 340 #define PSTRING_1_LE                            BIT(7)
 341 #define PSTRING_2_BE                            BIT(8)
 342 #define PSTRING_2_LE                            BIT(9)
 343 #define PSTRING_4_BE                            BIT(10)
 344 #define PSTRING_4_LE                            BIT(11)
 345 #define REGEX_LINE_COUNT                        BIT(11)
 346 #define PSTRING_LEN     \
 347     (PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE)
 348 #define PSTRING_LENGTH_INCLUDES_ITSELF          BIT(12)
 349 #define STRING_TRIM                             BIT(13)
 350 #define CHAR_COMPACT_WHITESPACE                 'W'
 351 #define CHAR_COMPACT_OPTIONAL_WHITESPACE        'w'
 352 #define CHAR_IGNORE_LOWERCASE                   'c'
 353 #define CHAR_IGNORE_UPPERCASE                   'C'
 354 #define CHAR_REGEX_OFFSET_START                 's'
 355 #define CHAR_TEXTTEST                           't'
 356 #define CHAR_TRIM                               'T'
 357 #define CHAR_BINTEST                            'b'
 358 #define CHAR_PSTRING_1_BE                       'B'
 359 #define CHAR_PSTRING_1_LE                       'B'
 360 #define CHAR_PSTRING_2_BE                       'H'
 361 #define CHAR_PSTRING_2_LE                       'h'
 362 #define CHAR_PSTRING_4_BE                       'L'
 363 #define CHAR_PSTRING_4_LE                       'l'
 364 #define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF     'J'
 365 #define STRING_IGNORE_CASE              (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
 366 #define STRING_DEFAULT_RANGE            100
 367
 368 #define INDIRECT_RELATIVE                       BIT(0)
 369 #define CHAR_INDIRECT_RELATIVE                  'r'
 370
 371 /* list of magic entries */
 372 struct mlist {
 373         struct magic *magic;            /* array of magic entries */
 374         uint32_t nmagic;                /* number of entries in array */
 375         void *map;                      /* internal resources used by entry */
 376         struct mlist *next, *prev;
 377 };
 378
 379 #ifdef __cplusplus
 380 #define CAST(T, b)      static_cast<T>(b)
 381 #define RCAST(T, b)     reinterpret_cast<T>(b)
 382 #define CCAST(T, b)     const_cast<T>(b)
 383 #else
 384 #define CAST(T, b)      ((T)(b))
 385 #define RCAST(T, b)     ((T)(uintptr_t)(b))
 386 #define CCAST(T, b)     ((T)(uintptr_t)(b))
 387 #endif
 388
 389 struct level_info {
 390         int32_t off;
 391         int got_match;
 392 #ifdef ENABLE_CONDITIONALS
 393         int last_match;
 394         int last_cond;  /* used for error checking by parse() */
 395 #endif
 396 };
 397
 398 #define MAGIC_SETS      2
 399
 400 struct magic_set {
 401         struct mlist *mlist[MAGIC_SETS];        /* list of regular entries */
 402         struct cont {
 403                 size_t len;
 404                 struct level_info *li;
 405         } c;
 406         struct out {
 407                 char *buf;              /* Accumulation buffer */
 408                 char *pbuf;             /* Printable buffer */
 409         } o;
 410         uint32_t offset;                /* a copy of m->offset while we */
 411                                         /* are working on the magic entry */
 412         uint32_t eoffset;               /* offset from end of file */
 413         int error;
 414         int flags;                      /* Control magic tests. */
 415         int event_flags;                /* Note things that happened. */
 416 #define                 EVENT_HAD_ERR           0x01
 417         const char *file;
 418         size_t line;                    /* current magic line number */
 419         mode_t mode;                    /* copy of current stat mode */
 420
 421         /* data for searches */
 422         struct {
 423                 const char *s;          /* start of search in original source */
 424                 size_t s_len;           /* length of search region */
 425                 size_t offset;          /* starting offset in source: XXX - should this be off_t? */
 426                 size_t rm_len;          /* match length */
 427         } search;
 428
 429         /* FIXME: Make the string dynamically allocated so that e.g.
 430            strings matched in files can be longer than MAXstring */
 431         union VALUETYPE ms_value;       /* either number or string */
 432         uint16_t indir_max;
 433         uint16_t name_max;
 434         uint16_t elf_shnum_max;
 435         uint16_t elf_phnum_max;
 436         uint16_t elf_notes_max;
 437         uint16_t regex_max;
 438         size_t bytes_max;               /* number of bytes to read from file */
 439 #define FILE_INDIR_MAX                  50
 440 #define FILE_NAME_MAX                   30
 441 #define FILE_ELF_SHNUM_MAX              32768
 442 #define FILE_ELF_PHNUM_MAX              2048
 443 #define FILE_ELF_NOTES_MAX              256
 444 #define FILE_REGEX_MAX                  8192
 445 };
 446
 447 /* Type for Unicode characters */
 448 typedef unsigned long unichar;
 449
 450 struct stat;
 451 #define FILE_T_LOCAL    1
 452 #define FILE_T_WINDOWS  2
 453 protected const char *file_fmttime(uint64_t, int, char *);
 454 protected struct magic_set *file_ms_alloc(int);
 455 protected void file_ms_free(struct magic_set *);
 456 protected int file_default(struct magic_set *, size_t);
 457 protected int file_buffer(struct magic_set *, int, struct stat *, const char *,
 458     const void *, size_t);
 459 protected int file_fsmagic(struct magic_set *, const char *, struct stat *);
 460 protected int file_pipe2file(struct magic_set *, int, const void *, size_t);
 461 protected int file_vprintf(struct magic_set *, const char *, va_list)
 462     __attribute__((__format__(__printf__, 2, 0)));
 463 protected int file_separator(struct magic_set *);
 464 protected size_t file_printedlen(const struct magic_set *);
 465 protected int file_replace(struct magic_set *, const char *, const char *);
 466 protected int file_printf(struct magic_set *, const char *, ...)
 467     __attribute__((__format__(__printf__, 2, 3)));
 468 protected int file_reset(struct magic_set *, int);
 469 protected int file_tryelf(struct magic_set *, const struct buffer *);
 470 protected int file_trycdf(struct magic_set *, const struct buffer *);
 471 #if HAVE_FORK
 472 protected int file_zmagic(struct magic_set *, const struct buffer *,
 473     const char *);
 474 #endif
 475 protected int file_ascmagic(struct magic_set *, const struct buffer *,
 476     int);
 477 protected int file_ascmagic_with_encoding(struct magic_set *,
 478     const struct buffer *, unichar *, size_t, const char *, const char *, int);
 479 protected int file_encoding(struct magic_set *, const struct buffer *,
 480     unichar **, size_t *, const char **, const char **, const char **);
 481 protected int file_is_json(struct magic_set *, const struct buffer *);
 482 protected int file_is_csv(struct magic_set *, const struct buffer *, int);
 483 protected int file_is_tar(struct magic_set *, const struct buffer *);
 484 protected int file_softmagic(struct magic_set *, const struct buffer *,
 485     uint16_t *, uint16_t *, int, int);
 486 protected int file_apprentice(struct magic_set *, const char *, int);
 487 protected int buffer_apprentice(struct magic_set *, struct magic **,
 488     size_t *, size_t);
 489 protected int file_magicfind(struct magic_set *, const char *, struct mlist *);
 490 protected uint64_t file_signextend(struct magic_set *, struct magic *,
 491     uint64_t);
 492 protected void file_badread(struct magic_set *);
 493 protected void file_badseek(struct magic_set *);
 494 protected void file_oomem(struct magic_set *, size_t);
 495 protected void file_error(struct magic_set *, int, const char *, ...)
 496     __attribute__((__format__(__printf__, 3, 4)));
 497 protected void file_magerror(struct magic_set *, const char *, ...)
 498     __attribute__((__format__(__printf__, 2, 3)));
 499 protected void file_magwarn(struct magic_set *, const char *, ...)
 500     __attribute__((__format__(__printf__, 2, 3)));
 501 protected void file_mdump(struct magic *);
 502 protected void file_showstr(FILE *, const char *, size_t);
 503 protected size_t file_mbswidth(const char *);
 504 protected const char *file_getbuffer(struct magic_set *);
 505 protected ssize_t sread(int, void *, size_t, int);
 506 protected int file_check_mem(struct magic_set *, unsigned int);
 507 protected int file_looks_utf8(const unsigned char *, size_t, unichar *,
 508     size_t *);
 509 protected size_t file_pstring_length_size(const struct magic *);
 510 protected size_t file_pstring_get_length(const struct magic *, const char *);
 511 protected char * file_printable(char *, size_t, const char *, size_t);
 512 #ifdef __EMX__
 513 protected int file_os2_apptype(struct magic_set *, const char *, const void *,
 514     size_t);
 515 #endif /* __EMX__ */
 516
 517 protected void buffer_init(struct buffer *, int, const struct stat *,
 518     const void *, size_t);
 519 protected void buffer_fini(struct buffer *);
 520 protected int buffer_fill(const struct buffer *);
 521
 522 #include <locale.h>
 523 #if defined(HAVE_XLOCALE_H)
 524 #include <xlocale.h>
 525 #endif
 526
 527 typedef struct {
 528         const char *pat;
 529 #if defined(HAVE_NEWLOCALE) && defined(HAVE_USELOCALE) && defined(HAVE_FREELOCALE)
 530 #define USE_C_LOCALE
 531         locale_t old_lc_ctype;
 532         locale_t c_lc_ctype;
 533 #else
 534         char *old_lc_ctype;
 535 #endif
 536         int rc;
 537         regex_t rx;
 538 } file_regex_t;
 539
 540 protected int file_regcomp(file_regex_t *, const char *, int);
 541 protected int file_regexec(file_regex_t *, const char *, size_t, regmatch_t *,
 542     int);
 543 protected void file_regfree(file_regex_t *);
 544 protected void file_regerror(file_regex_t *, int, struct magic_set *);
 545
 546 typedef struct {
 547         char *buf;
 548         uint32_t offset;
 549 } file_pushbuf_t;
 550
 551 protected file_pushbuf_t *file_push_buffer(struct magic_set *);
 552 protected char  *file_pop_buffer(struct magic_set *, file_pushbuf_t *);
 553
 554 #ifndef COMPILE_ONLY
 555 extern const char *file_names[];
 556 extern const size_t file_nnames;
 557 #endif
 558
 559 #ifndef HAVE_PREAD
 560 ssize_t pread(int, void *, size_t, off_t);
 561 #endif
 562 #ifndef HAVE_VASPRINTF
 563 int vasprintf(char **, const char *, va_list);
 564 #endif
 565 #ifndef HAVE_ASPRINTF
 566 int asprintf(char **, const char *, ...);
 567 #endif
 568 #ifndef HAVE_DPRINTF
 569 int dprintf(int, const char *, ...);
 570 #endif
 571
 572 #ifndef HAVE_STRLCPY
 573 size_t strlcpy(char *, const char *, size_t);
 574 #endif
 575 #ifndef HAVE_STRLCAT
 576 size_t strlcat(char *, const char *, size_t);
 577 #endif
 578 #ifndef HAVE_STRCASESTR
 579 char *strcasestr(const char *, const char *);
 580 #endif
 581 #ifndef HAVE_GETLINE
 582 ssize_t getline(char **, size_t *, FILE *);
 583 ssize_t getdelim(char **, size_t *, int, FILE *);
 584 #endif
 585 #ifndef HAVE_CTIME_R
 586 char   *ctime_r(const time_t *, char *);
 587 #endif
 588 #ifndef HAVE_ASCTIME_R
 589 char   *asctime_r(const struct tm *, char *);
 590 #endif
 591 #ifndef HAVE_GMTIME_R
 592 struct tm *gmtime_r(const time_t *, struct tm *);
 593 #endif
 594 #ifndef HAVE_LOCALTIME_R
 595 struct tm *localtime_r(const time_t *, struct tm *);
 596 #endif
 597 #ifndef HAVE_FMTCHECK
 598 const char *fmtcheck(const char *, const char *)
 599      __attribute__((__format_arg__(2)));
 600 #endif
 601
 602 #ifdef HAVE_LIBSECCOMP
 603 // basic filter
 604 // this mode should not interfere with normal operations
 605 // only some dangerous syscalls are blacklisted
 606 int enable_sandbox_basic(void);
 607
 608 // enhanced filter
 609 // this mode allows only the necessary syscalls used during normal operation
 610 // extensive testing required !!!
 611 int enable_sandbox_full(void);
 612 #endif
 613
 614 protected const char *file_getprogname(void);
 615 protected void file_setprogname(const char *);
 616 protected void file_err(int, const char *, ...)
 617     __attribute__((__format__(__printf__, 2, 3), __noreturn__));
 618 protected void file_errx(int, const char *, ...)
 619     __attribute__((__format__(__printf__, 2, 3), __noreturn__));
 620 protected void file_warn(const char *, ...)
 621     __attribute__((__format__(__printf__, 1, 2)));
 622 protected void file_warnx(const char *, ...)
 623     __attribute__((__format__(__printf__, 1, 2)));
 624
 625 #if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
 626 #define QUICK
 627 #endif
 628
 629 #ifndef O_BINARY
 630 #define O_BINARY        0
 631 #endif
 632 #ifndef O_NONBLOCK
 633 #define O_NONBLOCK      0
 634 #endif
 635
 636 #ifndef __cplusplus
 637 #if defined(__GNUC__) && (__GNUC__ >= 3)
 638 #define FILE_RCSID(id) \
 639 static const char rcsid[] __attribute__((__used__)) = id;
 640 #else
 641 #define FILE_RCSID(id) \
 642 static const char *rcsid(const char *p) { \
 643         return rcsid(p = id); \
 644 }
 645 #endif
 646 #else
 647 #define FILE_RCSID(id)
 648 #endif
 649 #ifndef __RCSID
 650 #define __RCSID(a)
 651 #endif
 652
 653 #endif /* __file_h__ */