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 1.152 2014/06/03 19:01:34 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 40 #ifdef WIN32 41 #ifdef _WIN64 42 #define SIZE_T_FORMAT "I64" 43 #else 44 #define SIZE_T_FORMAT "" 45 #endif 46 #define INT64_T_FORMAT "I64" 47 #else 48 #define SIZE_T_FORMAT "z" 49 #define INT64_T_FORMAT "ll" 50 #endif 51 52 #include <stdio.h> /* Include that here, to make sure __P gets defined */ 53 #include <errno.h> 54 #include <fcntl.h> /* For open and flags */ 55 #ifdef HAVE_STDINT_H 56 #ifndef __STDC_LIMIT_MACROS 57 #define __STDC_LIMIT_MACROS 58 #endif 59 #include <stdint.h> 60 #endif 61 #ifdef HAVE_INTTYPES_H 62 #include <inttypes.h> 63 #endif 64 #include <regex.h> 65 #include <time.h> 66 #include <sys/types.h> 67 #include <sys/param.h> 68 /* Do this here and now, because struct stat gets re-defined on solaris */ 69 #include <sys/stat.h> 70 #include <stdarg.h> 71 72 #define ENABLE_CONDITIONALS 73 74 #ifndef MAGIC 75 #define MAGIC "/etc/magic" 76 #endif 77 78 #if defined(__EMX__) || defined (WIN32) 79 #define PATHSEP ';' 80 #else 81 #define PATHSEP ':' 82 #endif 83 84 #define private static 85 86 #if HAVE_VISIBILITY && !defined(WIN32) 87 #define public __attribute__ ((__visibility__("default"))) 88 #ifndef protected 89 #define protected __attribute__ ((__visibility__("hidden"))) 90 #endif 91 #else 92 #define public 93 #ifndef protected 94 #define protected 95 #endif 96 #endif 97 98 #ifndef __arraycount 99 #define __arraycount(a) (sizeof(a) / sizeof(a[0])) 100 #endif 101 102 #ifndef __GNUC_PREREQ__ 103 #ifdef __GNUC__ 104 #define __GNUC_PREREQ__(x, y) \ 105 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ 106 (__GNUC__ > (x))) 107 #else 108 #define __GNUC_PREREQ__(x, y) 0 109 #endif 110 #endif 111 112 #ifndef __GNUC__ 113 #ifndef __attribute__ 114 #define __attribute__(a) 115 #endif 116 #endif 117 118 #ifndef MIN 119 #define MIN(a,b) (((a) < (b)) ? (a) : (b)) 120 #endif 121 122 #ifndef MAX 123 #define MAX(a,b) (((a) > (b)) ? (a) : (b)) 124 #endif 125 126 #ifndef HOWMANY 127 # define HOWMANY (256 * 1024) /* how much of the file to look at */ 128 #endif 129 #define MAXMAGIS 8192 /* max entries in any one magic file 130 or directory */ 131 #define MAXDESC 64 /* max len of text description/MIME type */ 132 #define MAXMIME 80 /* max len of text MIME type */ 133 #define MAXstring 64 /* max len of "string" types */ 134 135 #define MAGICNO 0xF11E041C 136 #define VERSIONNO 12 137 #define FILE_MAGICSIZE 248 138 139 #define FILE_LOAD 0 140 #define FILE_CHECK 1 141 #define FILE_COMPILE 2 142 #define FILE_LIST 3 143 144 union VALUETYPE { 145 uint8_t b; 146 uint16_t h; 147 uint32_t l; 148 uint64_t q; 149 uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */ 150 uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */ 151 uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */ 152 char s[MAXstring]; /* the search string or regex pattern */ 153 unsigned char us[MAXstring]; 154 float f; 155 double d; 156 }; 157 158 struct magic { 159 /* Word 1 */ 160 uint16_t cont_level; /* level of ">" */ 161 uint8_t flag; 162 #define INDIR 0x01 /* if '(...)' appears */ 163 #define OFFADD 0x02 /* if '>&' or '>...(&' appears */ 164 #define INDIROFFADD 0x04 /* if '>&(' appears */ 165 #define UNSIGNED 0x08 /* comparison is unsigned */ 166 #define NOSPACE 0x10 /* suppress space character before output */ 167 #define BINTEST 0x20 /* test is for a binary type (set only 168 for top-level tests) */ 169 #define TEXTTEST 0x40 /* for passing to file_softmagic */ 170 171 uint8_t factor; 172 173 /* Word 2 */ 174 uint8_t reln; /* relation (0=eq, '>'=gt, etc) */ 175 uint8_t vallen; /* length of string value, if any */ 176 uint8_t type; /* comparison type (FILE_*) */ 177 uint8_t in_type; /* type of indirection */ 178 #define FILE_INVALID 0 179 #define FILE_BYTE 1 180 #define FILE_SHORT 2 181 #define FILE_DEFAULT 3 182 #define FILE_LONG 4 183 #define FILE_STRING 5 184 #define FILE_DATE 6 185 #define FILE_BESHORT 7 186 #define FILE_BELONG 8 187 #define FILE_BEDATE 9 188 #define FILE_LESHORT 10 189 #define FILE_LELONG 11 190 #define FILE_LEDATE 12 191 #define FILE_PSTRING 13 192 #define FILE_LDATE 14 193 #define FILE_BELDATE 15 194 #define FILE_LELDATE 16 195 #define FILE_REGEX 17 196 #define FILE_BESTRING16 18 197 #define FILE_LESTRING16 19 198 #define FILE_SEARCH 20 199 #define FILE_MEDATE 21 200 #define FILE_MELDATE 22 201 #define FILE_MELONG 23 202 #define FILE_QUAD 24 203 #define FILE_LEQUAD 25 204 #define FILE_BEQUAD 26 205 #define FILE_QDATE 27 206 #define FILE_LEQDATE 28 207 #define FILE_BEQDATE 29 208 #define FILE_QLDATE 30 209 #define FILE_LEQLDATE 31 210 #define FILE_BEQLDATE 32 211 #define FILE_FLOAT 33 212 #define FILE_BEFLOAT 34 213 #define FILE_LEFLOAT 35 214 #define FILE_DOUBLE 36 215 #define FILE_BEDOUBLE 37 216 #define FILE_LEDOUBLE 38 217 #define FILE_BEID3 39 218 #define FILE_LEID3 40 219 #define FILE_INDIRECT 41 220 #define FILE_QWDATE 42 221 #define FILE_LEQWDATE 43 222 #define FILE_BEQWDATE 44 223 #define FILE_NAME 45 224 #define FILE_USE 46 225 #define FILE_CLEAR 47 226 #define FILE_NAMES_SIZE 48 /* size of array to contain all names */ 227 228 #define IS_STRING(t) \ 229 ((t) == FILE_STRING || \ 230 (t) == FILE_PSTRING || \ 231 (t) == FILE_BESTRING16 || \ 232 (t) == FILE_LESTRING16 || \ 233 (t) == FILE_REGEX || \ 234 (t) == FILE_SEARCH || \ 235 (t) == FILE_NAME || \ 236 (t) == FILE_USE) 237 238 #define FILE_FMT_NONE 0 239 #define FILE_FMT_NUM 1 /* "cduxXi" */ 240 #define FILE_FMT_STR 2 /* "s" */ 241 #define FILE_FMT_QUAD 3 /* "ll" */ 242 #define FILE_FMT_FLOAT 4 /* "eEfFgG" */ 243 #define FILE_FMT_DOUBLE 5 /* "eEfFgG" */ 244 245 /* Word 3 */ 246 uint8_t in_op; /* operator for indirection */ 247 uint8_t mask_op; /* operator for mask */ 248 #ifdef ENABLE_CONDITIONALS 249 uint8_t cond; /* conditional type */ 250 #else 251 uint8_t dummy; 252 #endif 253 uint8_t factor_op; 254 #define FILE_FACTOR_OP_PLUS '+' 255 #define FILE_FACTOR_OP_MINUS '-' 256 #define FILE_FACTOR_OP_TIMES '*' 257 #define FILE_FACTOR_OP_DIV '/' 258 #define FILE_FACTOR_OP_NONE '\0' 259 260 #define FILE_OPS "&|^+-*/%" 261 #define FILE_OPAND 0 262 #define FILE_OPOR 1 263 #define FILE_OPXOR 2 264 #define FILE_OPADD 3 265 #define FILE_OPMINUS 4 266 #define FILE_OPMULTIPLY 5 267 #define FILE_OPDIVIDE 6 268 #define FILE_OPMODULO 7 269 #define FILE_OPS_MASK 0x07 /* mask for above ops */ 270 #define FILE_UNUSED_1 0x08 271 #define FILE_UNUSED_2 0x10 272 #define FILE_UNUSED_3 0x20 273 #define FILE_OPINVERSE 0x40 274 #define FILE_OPINDIRECT 0x80 275 276 #ifdef ENABLE_CONDITIONALS 277 #define COND_NONE 0 278 #define COND_IF 1 279 #define COND_ELIF 2 280 #define COND_ELSE 3 281 #endif /* ENABLE_CONDITIONALS */ 282 283 /* Word 4 */ 284 uint32_t offset; /* offset to magic number */ 285 /* Word 5 */ 286 int32_t in_offset; /* offset from indirection */ 287 /* Word 6 */ 288 uint32_t lineno; /* line number in magic file */ 289 /* Word 7,8 */ 290 union { 291 uint64_t _mask; /* for use with numeric and date types */ 292 struct { 293 uint32_t _count; /* repeat/line count */ 294 uint32_t _flags; /* modifier flags */ 295 } _s; /* for use with string types */ 296 } _u; 297 #define num_mask _u._mask 298 #define str_range _u._s._count 299 #define str_flags _u._s._flags 300 /* Words 9-16 */ 301 union VALUETYPE value; /* either number or string */ 302 /* Words 17-32 */ 303 char desc[MAXDESC]; /* description */ 304 /* Words 33-52 */ 305 char mimetype[MAXMIME]; /* MIME type */ 306 /* Words 53-54 */ 307 char apple[8]; 308 }; 309 310 #define BIT(A) (1 << (A)) 311 #define STRING_COMPACT_WHITESPACE BIT(0) 312 #define STRING_COMPACT_OPTIONAL_WHITESPACE BIT(1) 313 #define STRING_IGNORE_LOWERCASE BIT(2) 314 #define STRING_IGNORE_UPPERCASE BIT(3) 315 #define REGEX_OFFSET_START BIT(4) 316 #define STRING_TEXTTEST BIT(5) 317 #define STRING_BINTEST BIT(6) 318 #define PSTRING_1_BE BIT(7) 319 #define PSTRING_1_LE BIT(7) 320 #define PSTRING_2_BE BIT(8) 321 #define PSTRING_2_LE BIT(9) 322 #define PSTRING_4_BE BIT(10) 323 #define PSTRING_4_LE BIT(11) 324 #define REGEX_LINE_COUNT BIT(11) 325 #define PSTRING_LEN \ 326 (PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE) 327 #define PSTRING_LENGTH_INCLUDES_ITSELF BIT(12) 328 #define STRING_TRIM BIT(13) 329 #define CHAR_COMPACT_WHITESPACE 'W' 330 #define CHAR_COMPACT_OPTIONAL_WHITESPACE 'w' 331 #define CHAR_IGNORE_LOWERCASE 'c' 332 #define CHAR_IGNORE_UPPERCASE 'C' 333 #define CHAR_REGEX_OFFSET_START 's' 334 #define CHAR_TEXTTEST 't' 335 #define CHAR_TRIM 'T' 336 #define CHAR_BINTEST 'b' 337 #define CHAR_PSTRING_1_BE 'B' 338 #define CHAR_PSTRING_1_LE 'B' 339 #define CHAR_PSTRING_2_BE 'H' 340 #define CHAR_PSTRING_2_LE 'h' 341 #define CHAR_PSTRING_4_BE 'L' 342 #define CHAR_PSTRING_4_LE 'l' 343 #define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF 'J' 344 #define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE) 345 #define STRING_DEFAULT_RANGE 100 346 347 348 /* list of magic entries */ 349 struct mlist { 350 struct magic *magic; /* array of magic entries */ 351 uint32_t nmagic; /* number of entries in array */ 352 void *map; /* internal resources used by entry */ 353 struct mlist *next, *prev; 354 }; 355 356 #ifdef __cplusplus 357 #define CAST(T, b) static_cast<T>(b) 358 #define RCAST(T, b) reinterpret_cast<T>(b) 359 #else 360 #define CAST(T, b) (T)(b) 361 #define RCAST(T, b) (T)(b) 362 #endif 363 364 struct level_info { 365 int32_t off; 366 int got_match; 367 #ifdef ENABLE_CONDITIONALS 368 int last_match; 369 int last_cond; /* used for error checking by parse() */ 370 #endif 371 }; 372 373 #define MAGIC_SETS 2 374 375 struct magic_set { 376 struct mlist *mlist[MAGIC_SETS]; /* list of regular entries */ 377 struct cont { 378 size_t len; 379 struct level_info *li; 380 } c; 381 struct out { 382 char *buf; /* Accumulation buffer */ 383 char *pbuf; /* Printable buffer */ 384 } o; 385 uint32_t offset; 386 int error; 387 int flags; /* Control magic tests. */ 388 int event_flags; /* Note things that happened. */ 389 #define EVENT_HAD_ERR 0x01 390 const char *file; 391 size_t line; /* current magic line number */ 392 393 /* data for searches */ 394 struct { 395 const char *s; /* start of search in original source */ 396 size_t s_len; /* length of search region */ 397 size_t offset; /* starting offset in source: XXX - should this be off_t? */ 398 size_t rm_len; /* match length */ 399 } search; 400 401 /* FIXME: Make the string dynamically allocated so that e.g. 402 strings matched in files can be longer than MAXstring */ 403 union VALUETYPE ms_value; /* either number or string */ 404 }; 405 406 /* Type for Unicode characters */ 407 typedef unsigned long unichar; 408 409 struct stat; 410 #define FILE_T_LOCAL 1 411 #define FILE_T_WINDOWS 2 412 protected const char *file_fmttime(uint64_t, int, char *); 413 protected struct magic_set *file_ms_alloc(int); 414 protected void file_ms_free(struct magic_set *); 415 protected int file_buffer(struct magic_set *, int, const char *, const void *, 416 size_t); 417 protected int file_fsmagic(struct magic_set *, const char *, struct stat *); 418 protected int file_pipe2file(struct magic_set *, int, const void *, size_t); 419 protected int file_vprintf(struct magic_set *, const char *, va_list) 420 __attribute__((__format__(__printf__, 2, 0))); 421 protected size_t file_printedlen(const struct magic_set *); 422 protected int file_replace(struct magic_set *, const char *, const char *); 423 protected int file_printf(struct magic_set *, const char *, ...) 424 __attribute__((__format__(__printf__, 2, 3))); 425 protected int file_reset(struct magic_set *); 426 protected int file_tryelf(struct magic_set *, int, const unsigned char *, 427 size_t); 428 protected int file_trycdf(struct magic_set *, int, const unsigned char *, 429 size_t); 430 #if HAVE_FORK 431 protected int file_zmagic(struct magic_set *, int, const char *, 432 const unsigned char *, size_t); 433 #endif 434 protected int file_ascmagic(struct magic_set *, const unsigned char *, size_t, 435 int); 436 protected int file_ascmagic_with_encoding(struct magic_set *, 437 const unsigned char *, size_t, unichar *, size_t, const char *, 438 const char *, int); 439 protected int file_encoding(struct magic_set *, const unsigned char *, size_t, 440 unichar **, size_t *, const char **, const char **, const char **); 441 protected int file_is_tar(struct magic_set *, const unsigned char *, size_t); 442 protected int file_softmagic(struct magic_set *, const unsigned char *, size_t, 443 size_t, int, int); 444 protected int file_apprentice(struct magic_set *, const char *, int); 445 protected int file_magicfind(struct magic_set *, const char *, struct mlist *); 446 protected uint64_t file_signextend(struct magic_set *, struct magic *, 447 uint64_t); 448 protected void file_badread(struct magic_set *); 449 protected void file_badseek(struct magic_set *); 450 protected void file_oomem(struct magic_set *, size_t); 451 protected void file_error(struct magic_set *, int, const char *, ...) 452 __attribute__((__format__(__printf__, 3, 4))); 453 protected void file_magerror(struct magic_set *, const char *, ...) 454 __attribute__((__format__(__printf__, 2, 3))); 455 protected void file_magwarn(struct magic_set *, const char *, ...) 456 __attribute__((__format__(__printf__, 2, 3))); 457 protected void file_mdump(struct magic *); 458 protected void file_showstr(FILE *, const char *, size_t); 459 protected size_t file_mbswidth(const char *); 460 protected const char *file_getbuffer(struct magic_set *); 461 protected ssize_t sread(int, void *, size_t, int); 462 protected int file_check_mem(struct magic_set *, unsigned int); 463 protected int file_looks_utf8(const unsigned char *, size_t, unichar *, 464 size_t *); 465 protected size_t file_pstring_length_size(const struct magic *); 466 protected size_t file_pstring_get_length(const struct magic *, const char *); 467 #ifdef __EMX__ 468 protected int file_os2_apptype(struct magic_set *, const char *, const void *, 469 size_t); 470 #endif /* __EMX__ */ 471 472 typedef struct { 473 const char *pat; 474 char *old_lc_ctype; 475 int rc; 476 regex_t rx; 477 } file_regex_t; 478 479 protected int file_regcomp(file_regex_t *, const char *, int); 480 protected int file_regexec(file_regex_t *, const char *, size_t, regmatch_t *, 481 int); 482 protected void file_regfree(file_regex_t *); 483 protected void file_regerror(file_regex_t *, int, struct magic_set *); 484 485 #ifndef COMPILE_ONLY 486 extern const char *file_names[]; 487 extern const size_t file_nnames; 488 #endif 489 490 #ifndef HAVE_STRERROR 491 extern int sys_nerr; 492 extern char *sys_errlist[]; 493 #define strerror(e) \ 494 (((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error") 495 #endif 496 497 #ifndef HAVE_STRTOUL 498 #define strtoul(a, b, c) strtol(a, b, c) 499 #endif 500 501 #ifndef HAVE_PREAD 502 ssize_t pread(int, void *, size_t, off_t); 503 #endif 504 #ifndef HAVE_VASPRINTF 505 int vasprintf(char **, const char *, va_list); 506 #endif 507 #ifndef HAVE_ASPRINTF 508 int asprintf(char **, const char *, ...); 509 #endif 510 511 #ifndef HAVE_STRLCPY 512 size_t strlcpy(char *, const char *, size_t); 513 #endif 514 #ifndef HAVE_STRLCAT 515 size_t strlcat(char *, const char *, size_t); 516 #endif 517 #ifndef HAVE_STRCASESTR 518 char *strcasestr(const char *, const char *); 519 #endif 520 #ifndef HAVE_GETLINE 521 ssize_t getline(char **, size_t *, FILE *); 522 ssize_t getdelim(char **, size_t *, int, FILE *); 523 #endif 524 #ifndef HAVE_CTIME_R 525 char *ctime_r(const time_t *, char *); 526 #endif 527 #ifndef HAVE_ASCTIME_R 528 char *asctime_r(const struct tm *, char *); 529 #endif 530 #ifndef HAVE_FMTCHECK 531 const char *fmtcheck(const char *, const char *) 532 __attribute__((__format_arg__(2))); 533 #endif 534 535 #if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK) 536 #define QUICK 537 #endif 538 539 #ifndef O_BINARY 540 #define O_BINARY 0 541 #endif 542 543 #ifndef __cplusplus 544 #if defined(__GNUC__) && (__GNUC__ >= 3) 545 #define FILE_RCSID(id) \ 546 static const char rcsid[] __attribute__((__used__)) = id; 547 #else 548 #define FILE_RCSID(id) \ 549 static const char *rcsid(const char *p) { \ 550 return rcsid(p = id); \ 551 } 552 #endif 553 #else 554 #define FILE_RCSID(id) 555 #endif 556 557 #endif /* __file_h__ */ 558