file.h 22 KB

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  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 1.247 2023/07/27 19:40:22 christos Exp $
  31. */
  32. #ifndef __file_h__
  33. #define __file_h__
  34. #ifdef HAVE_CONFIG_H
  35. #include <config.h>
  36. #endif
  37. #ifdef HAVE_STDINT_H
  38. #include <stdint.h>
  39. #endif
  40. #ifdef HAVE_INTTYPES_H
  41. #include <inttypes.h>
  42. #endif
  43. #ifndef __STDC_LIMIT_MACROS
  44. #define __STDC_LIMIT_MACROS
  45. #endif
  46. #ifndef __STDC_FORMAT_MACROS
  47. #define __STDC_FORMAT_MACROS
  48. #endif
  49. #ifdef _WIN32
  50. # ifdef PRIu32
  51. # ifdef _WIN64
  52. # define SIZE_T_FORMAT PRIu64
  53. # else
  54. # define SIZE_T_FORMAT PRIu32
  55. # endif
  56. # define INT64_T_FORMAT PRIi64
  57. # define INTMAX_T_FORMAT PRIiMAX
  58. # else
  59. # ifdef _WIN64
  60. # define SIZE_T_FORMAT "I64"
  61. # else
  62. # define SIZE_T_FORMAT ""
  63. # endif
  64. # define INT64_T_FORMAT "I64"
  65. # define INTMAX_T_FORMAT "I64"
  66. # endif
  67. #else
  68. # define SIZE_T_FORMAT "z"
  69. # define INT64_T_FORMAT "ll"
  70. # define INTMAX_T_FORMAT "j"
  71. #endif
  72. #include <stdio.h> /* Include that here, to make sure __P gets defined */
  73. #include <errno.h>
  74. #include <fcntl.h> /* For open and flags */
  75. #include <regex.h>
  76. #include <time.h>
  77. #include <sys/types.h>
  78. #ifndef WIN32
  79. #include <sys/param.h>
  80. #endif
  81. /* Do this here and now, because struct stat gets re-defined on solaris */
  82. #include <sys/stat.h>
  83. #include <stdarg.h>
  84. #include <locale.h>
  85. #if defined(HAVE_XLOCALE_H)
  86. #include <xlocale.h>
  87. #endif
  88. #define ENABLE_CONDITIONALS
  89. #ifndef MAGIC
  90. #define MAGIC "/etc/magic"
  91. #endif
  92. #if defined(__EMX__) || defined (WIN32)
  93. #define PATHSEP ';'
  94. #else
  95. #define PATHSEP ':'
  96. #endif
  97. #define file_private static
  98. #if HAVE_VISIBILITY && !defined(WIN32)
  99. #define file_public __attribute__ ((__visibility__("default")))
  100. #ifndef file_protected
  101. #define file_protected __attribute__ ((__visibility__("hidden")))
  102. #endif
  103. #else
  104. #define file_public
  105. #ifndef file_protected
  106. #define file_protected
  107. #endif
  108. #endif
  109. #ifndef __arraycount
  110. #define __arraycount(a) (sizeof(a) / sizeof(a[0]))
  111. #endif
  112. #ifndef __GNUC_PREREQ__
  113. #ifdef __GNUC__
  114. #define __GNUC_PREREQ__(x, y) \
  115. ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
  116. (__GNUC__ > (x)))
  117. #else
  118. #define __GNUC_PREREQ__(x, y) 0
  119. #endif
  120. #endif
  121. #ifndef __GNUC__
  122. #ifndef __attribute__
  123. #define __attribute__(a)
  124. #endif
  125. #endif
  126. #ifndef MIN
  127. #define MIN(a,b) (((a) < (b)) ? (a) : (b))
  128. #endif
  129. #ifndef MAX
  130. #define MAX(a,b) (((a) > (b)) ? (a) : (b))
  131. #endif
  132. #ifndef O_CLOEXEC
  133. # define O_CLOEXEC 0
  134. #endif
  135. #ifndef FD_CLOEXEC
  136. # define FD_CLOEXEC 1
  137. #endif
  138. /*
  139. * Dec 31, 23:59:59 9999
  140. * we need to make sure that we don't exceed 9999 because some libc
  141. * implementations like muslc crash otherwise
  142. */
  143. #define MAX_CTIME CAST(time_t, 0x3afff487cfULL)
  144. #define FILE_BADSIZE CAST(size_t, ~0ul)
  145. #define MAXDESC 64 /* max len of text description/MIME type */
  146. #define MAXMIME 80 /* max len of text MIME type */
  147. #define MAXstring 128 /* max len of "string" types */
  148. #define MAGICNO 0xF11E041C
  149. #define VERSIONNO 18
  150. #define FILE_MAGICSIZE 376
  151. #define FILE_GUID_SIZE sizeof("XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX")
  152. #define FILE_LOAD 0
  153. #define FILE_CHECK 1
  154. #define FILE_COMPILE 2
  155. #define FILE_LIST 3
  156. typedef regex_t file_regex_t;
  157. struct buffer {
  158. int fd;
  159. struct stat st;
  160. const void *fbuf;
  161. size_t flen;
  162. off_t eoff;
  163. void *ebuf;
  164. size_t elen;
  165. };
  166. union VALUETYPE {
  167. uint8_t b;
  168. uint16_t h;
  169. uint32_t l;
  170. uint64_t q;
  171. uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */
  172. uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */
  173. uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */
  174. char s[MAXstring]; /* the search string or regex pattern */
  175. unsigned char us[MAXstring];
  176. uint64_t guid[2];
  177. float f;
  178. double d;
  179. };
  180. struct magic {
  181. /* Word 1 */
  182. uint16_t cont_level; /* level of ">" */
  183. uint8_t flag;
  184. #define INDIR 0x01 /* if '(...)' appears */
  185. #define OFFADD 0x02 /* if '>&' or '>...(&' appears */
  186. #define INDIROFFADD 0x04 /* if '>&(' appears */
  187. #define UNSIGNED 0x08 /* comparison is unsigned */
  188. #define NOSPACE 0x10 /* suppress space character before output */
  189. #define BINTEST 0x20 /* test is for a binary type (set only
  190. for top-level tests) */
  191. #define TEXTTEST 0x40 /* for passing to file_softmagic */
  192. #define OFFNEGATIVE 0x80 /* relative to the end of file */
  193. uint8_t factor;
  194. /* Word 2 */
  195. uint8_t reln; /* relation (0=eq, '>'=gt, etc) */
  196. uint8_t vallen; /* length of string value, if any */
  197. uint8_t type; /* comparison type (FILE_*) */
  198. uint8_t in_type; /* type of indirection */
  199. #define FILE_INVALID 0
  200. #define FILE_BYTE 1
  201. #define FILE_SHORT 2
  202. #define FILE_DEFAULT 3
  203. #define FILE_LONG 4
  204. #define FILE_STRING 5
  205. #define FILE_DATE 6
  206. #define FILE_BESHORT 7
  207. #define FILE_BELONG 8
  208. #define FILE_BEDATE 9
  209. #define FILE_LESHORT 10
  210. #define FILE_LELONG 11
  211. #define FILE_LEDATE 12
  212. #define FILE_PSTRING 13
  213. #define FILE_LDATE 14
  214. #define FILE_BELDATE 15
  215. #define FILE_LELDATE 16
  216. #define FILE_REGEX 17
  217. #define FILE_BESTRING16 18
  218. #define FILE_LESTRING16 19
  219. #define FILE_SEARCH 20
  220. #define FILE_MEDATE 21
  221. #define FILE_MELDATE 22
  222. #define FILE_MELONG 23
  223. #define FILE_QUAD 24
  224. #define FILE_LEQUAD 25
  225. #define FILE_BEQUAD 26
  226. #define FILE_QDATE 27
  227. #define FILE_LEQDATE 28
  228. #define FILE_BEQDATE 29
  229. #define FILE_QLDATE 30
  230. #define FILE_LEQLDATE 31
  231. #define FILE_BEQLDATE 32
  232. #define FILE_FLOAT 33
  233. #define FILE_BEFLOAT 34
  234. #define FILE_LEFLOAT 35
  235. #define FILE_DOUBLE 36
  236. #define FILE_BEDOUBLE 37
  237. #define FILE_LEDOUBLE 38
  238. #define FILE_BEID3 39
  239. #define FILE_LEID3 40
  240. #define FILE_INDIRECT 41
  241. #define FILE_QWDATE 42
  242. #define FILE_LEQWDATE 43
  243. #define FILE_BEQWDATE 44
  244. #define FILE_NAME 45
  245. #define FILE_USE 46
  246. #define FILE_CLEAR 47
  247. #define FILE_DER 48
  248. #define FILE_GUID 49
  249. #define FILE_OFFSET 50
  250. #define FILE_BEVARINT 51
  251. #define FILE_LEVARINT 52
  252. #define FILE_MSDOSDATE 53
  253. #define FILE_LEMSDOSDATE 54
  254. #define FILE_BEMSDOSDATE 55
  255. #define FILE_MSDOSTIME 56
  256. #define FILE_LEMSDOSTIME 57
  257. #define FILE_BEMSDOSTIME 58
  258. #define FILE_OCTAL 59
  259. #define FILE_NAMES_SIZE 60 /* size of array to contain all names */
  260. #define IS_STRING(t) \
  261. ((t) == FILE_STRING || \
  262. (t) == FILE_PSTRING || \
  263. (t) == FILE_BESTRING16 || \
  264. (t) == FILE_LESTRING16 || \
  265. (t) == FILE_REGEX || \
  266. (t) == FILE_SEARCH || \
  267. (t) == FILE_INDIRECT || \
  268. (t) == FILE_NAME || \
  269. (t) == FILE_USE || \
  270. (t) == FILE_OCTAL)
  271. #define FILE_FMT_NONE 0
  272. #define FILE_FMT_NUM 1 /* "cduxXi" */
  273. #define FILE_FMT_STR 2 /* "s" */
  274. #define FILE_FMT_QUAD 3 /* "ll" */
  275. #define FILE_FMT_FLOAT 4 /* "eEfFgG" */
  276. #define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
  277. /* Word 3 */
  278. uint8_t in_op; /* operator for indirection */
  279. uint8_t mask_op; /* operator for mask */
  280. #ifdef ENABLE_CONDITIONALS
  281. uint8_t cond; /* conditional type */
  282. #else
  283. uint8_t dummy;
  284. #endif
  285. uint8_t factor_op;
  286. #define FILE_FACTOR_OP_PLUS '+'
  287. #define FILE_FACTOR_OP_MINUS '-'
  288. #define FILE_FACTOR_OP_TIMES '*'
  289. #define FILE_FACTOR_OP_DIV '/'
  290. #define FILE_FACTOR_OP_NONE '\0'
  291. #define FILE_OPS "&|^+-*/%"
  292. #define FILE_OPAND 0
  293. #define FILE_OPOR 1
  294. #define FILE_OPXOR 2
  295. #define FILE_OPADD 3
  296. #define FILE_OPMINUS 4
  297. #define FILE_OPMULTIPLY 5
  298. #define FILE_OPDIVIDE 6
  299. #define FILE_OPMODULO 7
  300. #define FILE_OPS_MASK 0x07 /* mask for above ops */
  301. #define FILE_UNUSED_1 0x08
  302. #define FILE_UNUSED_2 0x10
  303. #define FILE_OPSIGNED 0x20
  304. #define FILE_OPINVERSE 0x40
  305. #define FILE_OPINDIRECT 0x80
  306. #ifdef ENABLE_CONDITIONALS
  307. #define COND_NONE 0
  308. #define COND_IF 1
  309. #define COND_ELIF 2
  310. #define COND_ELSE 3
  311. #endif /* ENABLE_CONDITIONALS */
  312. /* Word 4 */
  313. int32_t offset; /* offset to magic number */
  314. /* Word 5 */
  315. int32_t in_offset; /* offset from indirection */
  316. /* Word 6 */
  317. uint32_t lineno; /* line number in magic file */
  318. /* Word 7,8 */
  319. union {
  320. uint64_t _mask; /* for use with numeric and date types */
  321. struct {
  322. uint32_t _count; /* repeat/line count */
  323. uint32_t _flags; /* modifier flags */
  324. } _s; /* for use with string types */
  325. } _u;
  326. #define num_mask _u._mask
  327. #define str_range _u._s._count
  328. #define str_flags _u._s._flags
  329. /* Words 9-24 */
  330. union VALUETYPE value; /* either number or string */
  331. /* Words 25-40 */
  332. char desc[MAXDESC]; /* description */
  333. /* Words 41-60 */
  334. char mimetype[MAXMIME]; /* MIME type */
  335. /* Words 61-62 */
  336. char apple[8]; /* APPLE CREATOR/TYPE */
  337. /* Words 63-78 */
  338. char ext[64]; /* Popular extensions */
  339. };
  340. #define BIT(A) (1 << (A))
  341. #define STRING_COMPACT_WHITESPACE BIT(0)
  342. #define STRING_COMPACT_OPTIONAL_WHITESPACE BIT(1)
  343. #define STRING_IGNORE_LOWERCASE BIT(2)
  344. #define STRING_IGNORE_UPPERCASE BIT(3)
  345. #define REGEX_OFFSET_START BIT(4)
  346. #define STRING_TEXTTEST BIT(5)
  347. #define STRING_BINTEST BIT(6)
  348. #define PSTRING_1_BE BIT(7)
  349. #define PSTRING_1_LE BIT(7)
  350. #define PSTRING_2_BE BIT(8)
  351. #define PSTRING_2_LE BIT(9)
  352. #define PSTRING_4_BE BIT(10)
  353. #define PSTRING_4_LE BIT(11)
  354. #define REGEX_LINE_COUNT BIT(11)
  355. #define PSTRING_LEN \
  356. (PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE)
  357. #define PSTRING_LENGTH_INCLUDES_ITSELF BIT(12)
  358. #define STRING_TRIM BIT(13)
  359. #define STRING_FULL_WORD BIT(14)
  360. #define CHAR_COMPACT_WHITESPACE 'W'
  361. #define CHAR_COMPACT_OPTIONAL_WHITESPACE 'w'
  362. #define CHAR_IGNORE_LOWERCASE 'c'
  363. #define CHAR_IGNORE_UPPERCASE 'C'
  364. #define CHAR_REGEX_OFFSET_START 's'
  365. #define CHAR_TEXTTEST 't'
  366. #define CHAR_TRIM 'T'
  367. #define CHAR_FULL_WORD 'f'
  368. #define CHAR_BINTEST 'b'
  369. #define CHAR_PSTRING_1_BE 'B'
  370. #define CHAR_PSTRING_1_LE 'B'
  371. #define CHAR_PSTRING_2_BE 'H'
  372. #define CHAR_PSTRING_2_LE 'h'
  373. #define CHAR_PSTRING_4_BE 'L'
  374. #define CHAR_PSTRING_4_LE 'l'
  375. #define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF 'J'
  376. #define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
  377. #define STRING_DEFAULT_RANGE 100
  378. #define INDIRECT_RELATIVE BIT(0)
  379. #define CHAR_INDIRECT_RELATIVE 'r'
  380. /* list of magic entries */
  381. struct mlist {
  382. struct magic *magic; /* array of magic entries */
  383. file_regex_t **magic_rxcomp; /* array of compiled regexps */
  384. size_t nmagic; /* number of entries in array */
  385. void *map; /* internal resources used by entry */
  386. struct mlist *next, *prev;
  387. };
  388. #ifdef __cplusplus
  389. #define CAST(T, b) static_cast<T>(b)
  390. #define RCAST(T, b) reinterpret_cast<T>(b)
  391. #define CCAST(T, b) const_cast<T>(b)
  392. #else
  393. #define CAST(T, b) ((T)(b))
  394. #define RCAST(T, b) ((T)(uintptr_t)(b))
  395. #define CCAST(T, b) ((T)(uintptr_t)(b))
  396. #endif
  397. struct level_info {
  398. int32_t off;
  399. int got_match;
  400. #ifdef ENABLE_CONDITIONALS
  401. int last_match;
  402. int last_cond; /* used for error checking by parse() */
  403. #endif
  404. };
  405. struct cont {
  406. size_t len;
  407. struct level_info *li;
  408. };
  409. #define MAGIC_SETS 2
  410. struct magic_set {
  411. struct mlist *mlist[MAGIC_SETS]; /* list of regular entries */
  412. struct cont c;
  413. struct out {
  414. char *buf; /* Accumulation buffer */
  415. size_t blen; /* Length of buffer */
  416. char *pbuf; /* Printable buffer */
  417. } o;
  418. uint32_t offset; /* a copy of m->offset while we */
  419. /* are working on the magic entry */
  420. uint32_t eoffset; /* offset from end of file */
  421. int error;
  422. int flags; /* Control magic tests. */
  423. int event_flags; /* Note things that happened. */
  424. #define EVENT_HAD_ERR 0x01
  425. const char *file;
  426. size_t line; /* current magic line number */
  427. mode_t mode; /* copy of current stat mode */
  428. /* data for searches */
  429. struct {
  430. const char *s; /* start of search in original source */
  431. size_t s_len; /* length of search region */
  432. size_t offset; /* starting offset in source: XXX - should this be off_t? */
  433. size_t rm_len; /* match length */
  434. } search;
  435. /* FIXME: Make the string dynamically allocated so that e.g.
  436. strings matched in files can be longer than MAXstring */
  437. union VALUETYPE ms_value; /* either number or string */
  438. uint16_t indir_max;
  439. uint16_t name_max;
  440. uint16_t elf_shnum_max;
  441. uint16_t elf_phnum_max;
  442. uint16_t elf_notes_max;
  443. uint16_t regex_max;
  444. size_t bytes_max; /* number of bytes to read from file */
  445. size_t encoding_max; /* bytes to look for encoding */
  446. size_t elf_shsize_max;
  447. #ifndef FILE_BYTES_MAX
  448. # define FILE_BYTES_MAX (7 * 1024 * 1024)/* how much of the file to look at */
  449. #endif /* above 0x6ab0f4 map offset for HelveticaNeue.dfont */
  450. #define FILE_ELF_NOTES_MAX 256
  451. #define FILE_ELF_PHNUM_MAX 2048
  452. #define FILE_ELF_SHNUM_MAX 32768
  453. #define FILE_ELF_SHSIZE_MAX (128 * 1024 * 1024)
  454. #define FILE_INDIR_MAX 50
  455. #define FILE_NAME_MAX 50
  456. #define FILE_REGEX_MAX 8192
  457. #define FILE_ENCODING_MAX (64 * 1024)
  458. #if defined(HAVE_NEWLOCALE) && defined(HAVE_USELOCALE) && defined(HAVE_FREELOCALE)
  459. #define USE_C_LOCALE
  460. locale_t c_lc_ctype;
  461. #define file_locale_used
  462. #else
  463. #define file_locale_used __attribute__((__unused__))
  464. #endif
  465. };
  466. /* Type for Unicode characters */
  467. typedef unsigned long file_unichar_t;
  468. struct stat;
  469. #define FILE_T_LOCAL 1
  470. #define FILE_T_WINDOWS 2
  471. file_protected const char *file_fmtdatetime(char *, size_t, uint64_t, int);
  472. file_protected const char *file_fmtdate(char *, size_t, uint16_t);
  473. file_protected const char *file_fmttime(char *, size_t, uint16_t);
  474. file_protected const char *file_fmtvarint(char *, size_t, const unsigned char *,
  475. int);
  476. file_protected const char *file_fmtnum(char *, size_t, const char *, int);
  477. file_protected struct magic_set *file_ms_alloc(int);
  478. file_protected void file_ms_free(struct magic_set *);
  479. file_protected int file_default(struct magic_set *, size_t);
  480. file_protected int file_buffer(struct magic_set *, int, struct stat *,
  481. const char *, const void *, size_t);
  482. file_protected int file_fsmagic(struct magic_set *, const char *,
  483. struct stat *);
  484. file_protected int file_pipe2file(struct magic_set *, int, const void *,
  485. size_t);
  486. file_protected int file_vprintf(struct magic_set *, const char *, va_list)
  487. __attribute__((__format__(__printf__, 2, 0)));
  488. file_protected int file_separator(struct magic_set *);
  489. file_protected char *file_copystr(char *, size_t, size_t, const char *);
  490. file_protected int file_checkfmt(char *, size_t, const char *);
  491. file_protected size_t file_printedlen(const struct magic_set *);
  492. file_protected int file_print_guid(char *, size_t, const uint64_t *);
  493. file_protected int file_parse_guid(const char *, uint64_t *);
  494. file_protected int file_replace(struct magic_set *, const char *, const char *);
  495. file_protected int file_printf(struct magic_set *, const char *, ...)
  496. __attribute__((__format__(__printf__, 2, 3)));
  497. file_protected int file_reset(struct magic_set *, int);
  498. file_protected int file_tryelf(struct magic_set *, const struct buffer *);
  499. file_protected int file_trycdf(struct magic_set *, const struct buffer *);
  500. #if HAVE_FORK
  501. file_protected int file_zmagic(struct magic_set *, const struct buffer *,
  502. const char *);
  503. #endif
  504. file_protected int file_ascmagic(struct magic_set *, const struct buffer *,
  505. int);
  506. file_protected int file_ascmagic_with_encoding(struct magic_set *,
  507. const struct buffer *, file_unichar_t *, size_t, const char *, const char *, int);
  508. file_protected int file_encoding(struct magic_set *, const struct buffer *,
  509. file_unichar_t **, size_t *, const char **, const char **, const char **);
  510. file_protected int file_is_json(struct magic_set *, const struct buffer *);
  511. file_protected int file_is_csv(struct magic_set *, const struct buffer *, int,
  512. const char *);
  513. file_protected int file_is_simh(struct magic_set *, const struct buffer *);
  514. file_protected int file_is_tar(struct magic_set *, const struct buffer *);
  515. file_protected int file_softmagic(struct magic_set *, const struct buffer *,
  516. uint16_t *, uint16_t *, int, int);
  517. file_protected int file_apprentice(struct magic_set *, const char *, int);
  518. file_protected size_t file_magic_strength(const struct magic *, size_t);
  519. file_protected int buffer_apprentice(struct magic_set *, struct magic **,
  520. size_t *, size_t);
  521. file_protected int file_magicfind(struct magic_set *, const char *,
  522. struct mlist *);
  523. file_protected uint64_t file_signextend(struct magic_set *, struct magic *,
  524. uint64_t);
  525. file_protected uintmax_t file_varint2uintmax_t(const unsigned char *, int,
  526. size_t *);
  527. file_protected void file_badread(struct magic_set *);
  528. file_protected void file_badseek(struct magic_set *);
  529. file_protected void file_oomem(struct magic_set *, size_t);
  530. file_protected void file_error(struct magic_set *, int, const char *, ...)
  531. __attribute__((__format__(__printf__, 3, 4)));
  532. file_protected void file_magerror(struct magic_set *, const char *, ...)
  533. __attribute__((__format__(__printf__, 2, 3)));
  534. file_protected void file_magwarn(struct magic_set *, const char *, ...)
  535. __attribute__((__format__(__printf__, 2, 3)));
  536. file_protected void file_mdump(struct magic *);
  537. file_protected void file_showstr(FILE *, const char *, size_t);
  538. file_protected size_t file_mbswidth(struct magic_set *, const char *);
  539. file_protected const char *file_getbuffer(struct magic_set *);
  540. file_protected ssize_t sread(int, void *, size_t, int);
  541. file_protected int file_check_mem(struct magic_set *, unsigned int);
  542. file_protected int file_looks_utf8(const unsigned char *, size_t,
  543. file_unichar_t *, size_t *);
  544. file_protected size_t file_pstring_length_size(struct magic_set *,
  545. const struct magic *);
  546. file_protected size_t file_pstring_get_length(struct magic_set *,
  547. const struct magic *, const char *);
  548. file_protected char * file_printable(struct magic_set *, char *, size_t,
  549. const char *, size_t);
  550. #ifdef __EMX__
  551. file_protected int file_os2_apptype(struct magic_set *, const char *,
  552. const void *, size_t);
  553. #endif /* __EMX__ */
  554. file_protected int file_pipe_closexec(int *);
  555. file_protected int file_clear_closexec(int);
  556. file_protected char *file_strtrim(char *);
  557. file_protected void buffer_init(struct buffer *, int, const struct stat *,
  558. const void *, size_t);
  559. file_protected void buffer_fini(struct buffer *);
  560. file_protected int buffer_fill(const struct buffer *);
  561. file_protected int file_regcomp(struct magic_set *, file_regex_t *,
  562. const char *, int);
  563. file_protected int file_regexec(struct magic_set *, file_regex_t *,
  564. const char *, size_t, regmatch_t *, int);
  565. file_protected void file_regfree(file_regex_t *);
  566. typedef struct {
  567. char *buf;
  568. size_t blen;
  569. uint32_t offset;
  570. } file_pushbuf_t;
  571. file_protected file_pushbuf_t *file_push_buffer(struct magic_set *);
  572. file_protected char *file_pop_buffer(struct magic_set *, file_pushbuf_t *);
  573. #ifndef COMPILE_ONLY
  574. extern const char *file_names[];
  575. extern const size_t file_nnames;
  576. #endif
  577. #ifndef HAVE_PREAD
  578. ssize_t pread(int, void *, size_t, off_t);
  579. #endif
  580. #ifndef HAVE_VASPRINTF
  581. int vasprintf(char **, const char *, va_list);
  582. #endif
  583. #ifndef HAVE_ASPRINTF
  584. int asprintf(char **, const char *, ...);
  585. #endif
  586. #ifndef HAVE_DPRINTF
  587. int dprintf(int, const char *, ...);
  588. #endif
  589. #ifndef HAVE_STRLCPY
  590. size_t strlcpy(char *, const char *, size_t);
  591. #endif
  592. #ifndef HAVE_STRLCAT
  593. size_t strlcat(char *, const char *, size_t);
  594. #endif
  595. #ifndef HAVE_STRCASESTR
  596. char *strcasestr(const char *, const char *);
  597. #endif
  598. #ifndef HAVE_GETLINE
  599. ssize_t getline(char **, size_t *, FILE *);
  600. ssize_t getdelim(char **, size_t *, int, FILE *);
  601. #endif
  602. #ifndef HAVE_CTIME_R
  603. char *ctime_r(const time_t *, char *);
  604. #endif
  605. #ifndef HAVE_ASCTIME_R
  606. char *asctime_r(const struct tm *, char *);
  607. #endif
  608. #ifndef HAVE_GMTIME_R
  609. struct tm *gmtime_r(const time_t *, struct tm *);
  610. #endif
  611. #ifndef HAVE_LOCALTIME_R
  612. struct tm *localtime_r(const time_t *, struct tm *);
  613. #endif
  614. #ifndef HAVE_FMTCHECK
  615. const char *fmtcheck(const char *, const char *)
  616. __attribute__((__format_arg__(2)));
  617. #endif
  618. #ifdef HAVE_LIBSECCOMP
  619. // basic filter
  620. // this mode should not interfere with normal operations
  621. // only some dangerous syscalls are blacklisted
  622. int enable_sandbox_basic(void);
  623. // enhanced filter
  624. // this mode allows only the necessary syscalls used during normal operation
  625. // extensive testing required !!!
  626. int enable_sandbox_full(void);
  627. #endif
  628. file_protected const char *file_getprogname(void);
  629. file_protected void file_setprogname(const char *);
  630. file_protected void file_err(int, const char *, ...)
  631. __attribute__((__format__(__printf__, 2, 3), __noreturn__));
  632. file_protected void file_errx(int, const char *, ...)
  633. __attribute__((__format__(__printf__, 2, 3), __noreturn__));
  634. file_protected void file_warn(const char *, ...)
  635. __attribute__((__format__(__printf__, 1, 2)));
  636. file_protected void file_warnx(const char *, ...)
  637. __attribute__((__format__(__printf__, 1, 2)));
  638. #if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
  639. #define QUICK
  640. #endif
  641. #ifndef O_BINARY
  642. #define O_BINARY 0
  643. #endif
  644. #ifndef O_NONBLOCK
  645. #define O_NONBLOCK 0
  646. #endif
  647. #ifndef __cplusplus
  648. #if defined(__GNUC__) && (__GNUC__ >= 3)
  649. #define FILE_RCSID(id) \
  650. static const char rcsid[] __attribute__((__used__)) = id;
  651. #else
  652. #define FILE_RCSID(id) \
  653. static const char *rcsid(const char *p) { \
  654. return rcsid(p = id); \
  655. }
  656. #endif
  657. #else
  658. #define FILE_RCSID(id)
  659. #endif
  660. #ifndef __RCSID
  661. #define __RCSID(a)
  662. #endif
  663. #endif /* __file_h__ */