1 /* $NetBSD: file.h,v 1.26 2021/04/09 19:11:42 christos Exp $ */ 2 3 /* 4 * Copyright (c) Ian F. Darwin 1986-1995. 5 * Software written by Ian F. Darwin and others; 6 * maintained 1995-present by Christos Zoulas and others. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 /* 31 * file.h - definitions for file(1) program 32 * @(#)$File: file.h,v 1.225 2021/02/05 22:29:07 christos Exp $ 33 */ 34 35 #ifndef __file_h__ 36 #define __file_h__ 37 38 #ifdef HAVE_CONFIG_H 39 #include <config.h> 40 #endif 41 42 #ifdef HAVE_STDINT_H 43 #include <stdint.h> 44 #endif 45 46 #ifdef HAVE_INTTYPES_H 47 #include <inttypes.h> 48 #endif 49 50 #ifndef __STDC_LIMIT_MACROS 51 #define __STDC_LIMIT_MACROS 52 #endif 53 #ifndef __STDC_FORMAT_MACROS 54 #define __STDC_FORMAT_MACROS 55 #endif 56 57 #ifdef _WIN32 58 # ifdef PRIu32 59 # ifdef _WIN64 60 # define SIZE_T_FORMAT PRIu64 61 # else 62 # define SIZE_T_FORMAT PRIu32 63 # endif 64 # define INT64_T_FORMAT PRIi64 65 # define INTMAX_T_FORMAT PRIiMAX 66 # else 67 # ifdef _WIN64 68 # define SIZE_T_FORMAT "I64" 69 # else 70 # define SIZE_T_FORMAT "" 71 # endif 72 # define INT64_T_FORMAT "I64" 73 # define INTMAX_T_FORMAT "I64" 74 # endif 75 #else 76 # define SIZE_T_FORMAT "z" 77 # define INT64_T_FORMAT "ll" 78 # define INTMAX_T_FORMAT "j" 79 #endif 80 81 #include <stdio.h> /* Include that here, to make sure __P gets defined */ 82 #include <errno.h> 83 #include <fcntl.h> /* For open and flags */ 84 #include <regex.h> 85 #include <time.h> 86 #include <sys/types.h> 87 #ifndef WIN32 88 #include <sys/param.h> 89 #endif 90 /* Do this here and now, because struct stat gets re-defined on solaris */ 91 #include <sys/stat.h> 92 #include <stdarg.h> 93 94 #define ENABLE_CONDITIONALS 95 96 #ifndef MAGIC 97 #define MAGIC "/etc/magic" 98 #endif 99 100 #if defined(__EMX__) || defined (WIN32) 101 #define PATHSEP ';' 102 #else 103 #define PATHSEP ':' 104 #endif 105 106 #define private static 107 108 #if HAVE_VISIBILITY && !defined(WIN32) 109 #define public __attribute__ ((__visibility__("default"))) 110 #ifndef protected 111 #define protected __attribute__ ((__visibility__("hidden"))) 112 #endif 113 #else 114 #define public 115 #ifndef protected 116 #define protected 117 #endif 118 #endif 119 120 #ifndef __arraycount 121 #define __arraycount(a) (sizeof(a) / sizeof(a[0])) 122 #endif 123 124 #ifndef __GNUC_PREREQ__ 125 #ifdef __GNUC__ 126 #define __GNUC_PREREQ__(x, y) \ 127 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ 128 (__GNUC__ > (x))) 129 #else 130 #define __GNUC_PREREQ__(x, y) 0 131 #endif 132 #endif 133 134 #ifndef __GNUC__ 135 #ifndef __attribute__ 136 #define __attribute__(a) 137 #endif 138 #endif 139 140 #ifndef MIN 141 #define MIN(a,b) (((a) < (b)) ? (a) : (b)) 142 #endif 143 144 #ifndef MAX 145 #define MAX(a,b) (((a) > (b)) ? (a) : (b)) 146 #endif 147 148 #ifndef O_CLOEXEC 149 # define O_CLOEXEC 0 150 #endif 151 152 #ifndef FD_CLOEXEC 153 # define FD_CLOEXEC 1 154 #endif 155 156 #define FILE_BADSIZE CAST(size_t, ~0ul) 157 #define MAXDESC 64 /* max len of text description/MIME type */ 158 #define MAXMIME 80 /* max len of text MIME type */ 159 #define MAXstring 128 /* max len of "string" types */ 160 161 #define MAGICNO 0xF11E041C 162 #define VERSIONNO 16 163 #define FILE_MAGICSIZE 376 164 165 #define FILE_GUID_SIZE sizeof("XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX") 166 167 #define FILE_LOAD 0 168 #define FILE_CHECK 1 169 #define FILE_COMPILE 2 170 #define FILE_LIST 3 171 172 struct buffer { 173 int fd; 174 struct stat st; 175 const void *fbuf; 176 size_t flen; 177 off_t eoff; 178 void *ebuf; 179 size_t elen; 180 }; 181 182 union VALUETYPE { 183 uint8_t b; 184 uint16_t h; 185 uint32_t l; 186 uint64_t q; 187 uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */ 188 uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */ 189 uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */ 190 char s[MAXstring]; /* the search string or regex pattern */ 191 unsigned char us[MAXstring]; 192 uint64_t guid[2]; 193 float f; 194 double d; 195 }; 196 197 struct magic { 198 /* Word 1 */ 199 uint16_t cont_level; /* level of ">" */ 200 uint8_t flag; 201 #define INDIR 0x01 /* if '(...)' appears */ 202 #define OFFADD 0x02 /* if '>&' or '>...(&' appears */ 203 #define INDIROFFADD 0x04 /* if '>&(' appears */ 204 #define UNSIGNED 0x08 /* comparison is unsigned */ 205 #define NOSPACE 0x10 /* suppress space character before output */ 206 #define BINTEST 0x20 /* test is for a binary type (set only 207 for top-level tests) */ 208 #define TEXTTEST 0x40 /* for passing to file_softmagic */ 209 #define OFFNEGATIVE 0x80 /* relative to the end of file */ 210 211 uint8_t factor; 212 213 /* Word 2 */ 214 uint8_t reln; /* relation (0=eq, '>'=gt, etc) */ 215 uint8_t vallen; /* length of string value, if any */ 216 uint8_t type; /* comparison type (FILE_*) */ 217 uint8_t in_type; /* type of indirection */ 218 #define FILE_INVALID 0 219 #define FILE_BYTE 1 220 #define FILE_SHORT 2 221 #define FILE_DEFAULT 3 222 #define FILE_LONG 4 223 #define FILE_STRING 5 224 #define FILE_DATE 6 225 #define FILE_BESHORT 7 226 #define FILE_BELONG 8 227 #define FILE_BEDATE 9 228 #define FILE_LESHORT 10 229 #define FILE_LELONG 11 230 #define FILE_LEDATE 12 231 #define FILE_PSTRING 13 232 #define FILE_LDATE 14 233 #define FILE_BELDATE 15 234 #define FILE_LELDATE 16 235 #define FILE_REGEX 17 236 #define FILE_BESTRING16 18 237 #define FILE_LESTRING16 19 238 #define FILE_SEARCH 20 239 #define FILE_MEDATE 21 240 #define FILE_MELDATE 22 241 #define FILE_MELONG 23 242 #define FILE_QUAD 24 243 #define FILE_LEQUAD 25 244 #define FILE_BEQUAD 26 245 #define FILE_QDATE 27 246 #define FILE_LEQDATE 28 247 #define FILE_BEQDATE 29 248 #define FILE_QLDATE 30 249 #define FILE_LEQLDATE 31 250 #define FILE_BEQLDATE 32 251 #define FILE_FLOAT 33 252 #define FILE_BEFLOAT 34 253 #define FILE_LEFLOAT 35 254 #define FILE_DOUBLE 36 255 #define FILE_BEDOUBLE 37 256 #define FILE_LEDOUBLE 38 257 #define FILE_BEID3 39 258 #define FILE_LEID3 40 259 #define FILE_INDIRECT 41 260 #define FILE_QWDATE 42 261 #define FILE_LEQWDATE 43 262 #define FILE_BEQWDATE 44 263 #define FILE_NAME 45 264 #define FILE_USE 46 265 #define FILE_CLEAR 47 266 #define FILE_DER 48 267 #define FILE_GUID 49 268 #define FILE_OFFSET 50 269 #define FILE_NAMES_SIZE 51 /* size of array to contain all names */ 270 271 #define IS_STRING(t) \ 272 ((t) == FILE_STRING || \ 273 (t) == FILE_PSTRING || \ 274 (t) == FILE_BESTRING16 || \ 275 (t) == FILE_LESTRING16 || \ 276 (t) == FILE_REGEX || \ 277 (t) == FILE_SEARCH || \ 278 (t) == FILE_INDIRECT || \ 279 (t) == FILE_NAME || \ 280 (t) == FILE_USE) 281 282 #define FILE_FMT_NONE 0 283 #define FILE_FMT_NUM 1 /* "cduxXi" */ 284 #define FILE_FMT_STR 2 /* "s" */ 285 #define FILE_FMT_QUAD 3 /* "ll" */ 286 #define FILE_FMT_FLOAT 4 /* "eEfFgG" */ 287 #define FILE_FMT_DOUBLE 5 /* "eEfFgG" */ 288 289 /* Word 3 */ 290 uint8_t in_op; /* operator for indirection */ 291 uint8_t mask_op; /* operator for mask */ 292 #ifdef ENABLE_CONDITIONALS 293 uint8_t cond; /* conditional type */ 294 #else 295 uint8_t dummy; 296 #endif 297 uint8_t factor_op; 298 #define FILE_FACTOR_OP_PLUS '+' 299 #define FILE_FACTOR_OP_MINUS '-' 300 #define FILE_FACTOR_OP_TIMES '*' 301 #define FILE_FACTOR_OP_DIV '/' 302 #define FILE_FACTOR_OP_NONE '\0' 303 304 #define FILE_OPS "&|^+-*/%" 305 #define FILE_OPAND 0 306 #define FILE_OPOR 1 307 #define FILE_OPXOR 2 308 #define FILE_OPADD 3 309 #define FILE_OPMINUS 4 310 #define FILE_OPMULTIPLY 5 311 #define FILE_OPDIVIDE 6 312 #define FILE_OPMODULO 7 313 #define FILE_OPS_MASK 0x07 /* mask for above ops */ 314 #define FILE_UNUSED_1 0x08 315 #define FILE_UNUSED_2 0x10 316 #define FILE_OPSIGNED 0x20 317 #define FILE_OPINVERSE 0x40 318 #define FILE_OPINDIRECT 0x80 319 320 #ifdef ENABLE_CONDITIONALS 321 #define COND_NONE 0 322 #define COND_IF 1 323 #define COND_ELIF 2 324 #define COND_ELSE 3 325 #endif /* ENABLE_CONDITIONALS */ 326 327 /* Word 4 */ 328 int32_t offset; /* offset to magic number */ 329 /* Word 5 */ 330 int32_t in_offset; /* offset from indirection */ 331 /* Word 6 */ 332 uint32_t lineno; /* line number in magic file */ 333 /* Word 7,8 */ 334 union { 335 uint64_t _mask; /* for use with numeric and date types */ 336 struct { 337 uint32_t _count; /* repeat/line count */ 338 uint32_t _flags; /* modifier flags */ 339 } _s; /* for use with string types */ 340 } _u; 341 #define num_mask _u._mask 342 #define str_range _u._s._count 343 #define str_flags _u._s._flags 344 /* Words 9-24 */ 345 union VALUETYPE value; /* either number or string */ 346 /* Words 25-40 */ 347 char desc[MAXDESC]; /* description */ 348 /* Words 41-60 */ 349 char mimetype[MAXMIME]; /* MIME type */ 350 /* Words 61-62 */ 351 char apple[8]; /* APPLE CREATOR/TYPE */ 352 /* Words 63-78 */ 353 char ext[64]; /* Popular extensions */ 354 }; 355 356 #define BIT(A) (1 << (A)) 357 #define STRING_COMPACT_WHITESPACE BIT(0) 358 #define STRING_COMPACT_OPTIONAL_WHITESPACE BIT(1) 359 #define STRING_IGNORE_LOWERCASE BIT(2) 360 #define STRING_IGNORE_UPPERCASE BIT(3) 361 #define REGEX_OFFSET_START BIT(4) 362 #define STRING_TEXTTEST BIT(5) 363 #define STRING_BINTEST BIT(6) 364 #define PSTRING_1_BE BIT(7) 365 #define PSTRING_1_LE BIT(7) 366 #define PSTRING_2_BE BIT(8) 367 #define PSTRING_2_LE BIT(9) 368 #define PSTRING_4_BE BIT(10) 369 #define PSTRING_4_LE BIT(11) 370 #define REGEX_LINE_COUNT BIT(11) 371 #define PSTRING_LEN \ 372 (PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE) 373 #define PSTRING_LENGTH_INCLUDES_ITSELF BIT(12) 374 #define STRING_TRIM BIT(13) 375 #define CHAR_COMPACT_WHITESPACE 'W' 376 #define CHAR_COMPACT_OPTIONAL_WHITESPACE 'w' 377 #define CHAR_IGNORE_LOWERCASE 'c' 378 #define CHAR_IGNORE_UPPERCASE 'C' 379 #define CHAR_REGEX_OFFSET_START 's' 380 #define CHAR_TEXTTEST 't' 381 #define CHAR_TRIM 'T' 382 #define CHAR_BINTEST 'b' 383 #define CHAR_PSTRING_1_BE 'B' 384 #define CHAR_PSTRING_1_LE 'B' 385 #define CHAR_PSTRING_2_BE 'H' 386 #define CHAR_PSTRING_2_LE 'h' 387 #define CHAR_PSTRING_4_BE 'L' 388 #define CHAR_PSTRING_4_LE 'l' 389 #define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF 'J' 390 #define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE) 391 #define STRING_DEFAULT_RANGE 100 392 393 #define INDIRECT_RELATIVE BIT(0) 394 #define CHAR_INDIRECT_RELATIVE 'r' 395 396 /* list of magic entries */ 397 struct mlist { 398 struct magic *magic; /* array of magic entries */ 399 uint32_t nmagic; /* number of entries in array */ 400 void *map; /* internal resources used by entry */ 401 struct mlist *next, *prev; 402 }; 403 404 #ifdef __cplusplus 405 #define CAST(T, b) static_cast<T>(b) 406 #define RCAST(T, b) reinterpret_cast<T>(b) 407 #define CCAST(T, b) const_cast<T>(b) 408 #else 409 #define CAST(T, b) ((T)(b)) 410 #define RCAST(T, b) ((T)(uintptr_t)(b)) 411 #define CCAST(T, b) ((T)(uintptr_t)(b)) 412 #endif 413 414 struct level_info { 415 int32_t off; 416 int got_match; 417 #ifdef ENABLE_CONDITIONALS 418 int last_match; 419 int last_cond; /* used for error checking by parse() */ 420 #endif 421 }; 422 423 struct cont { 424 size_t len; 425 struct level_info *li; 426 }; 427 428 #define MAGIC_SETS 2 429 430 struct magic_set { 431 struct mlist *mlist[MAGIC_SETS]; /* list of regular entries */ 432 struct cont c; 433 struct out { 434 char *buf; /* Accumulation buffer */ 435 size_t blen; /* Length of buffer */ 436 char *pbuf; /* Printable buffer */ 437 } o; 438 uint32_t offset; /* a copy of m->offset while we */ 439 /* are working on the magic entry */ 440 uint32_t eoffset; /* offset from end of file */ 441 int error; 442 int flags; /* Control magic tests. */ 443 int event_flags; /* Note things that happened. */ 444 #define EVENT_HAD_ERR 0x01 445 const char *file; 446 size_t line; /* current magic line number */ 447 mode_t mode; /* copy of current stat mode */ 448 449 /* data for searches */ 450 struct { 451 const char *s; /* start of search in original source */ 452 size_t s_len; /* length of search region */ 453 size_t offset; /* starting offset in source: XXX - should this be off_t? */ 454 size_t rm_len; /* match length */ 455 } search; 456 457 /* FIXME: Make the string dynamically allocated so that e.g. 458 strings matched in files can be longer than MAXstring */ 459 union VALUETYPE ms_value; /* either number or string */ 460 uint16_t indir_max; 461 uint16_t name_max; 462 uint16_t elf_shnum_max; 463 uint16_t elf_phnum_max; 464 uint16_t elf_notes_max; 465 uint16_t regex_max; 466 size_t bytes_max; /* number of bytes to read from file */ 467 size_t encoding_max; /* bytes to look for encoding */ 468 #ifndef FILE_BYTES_MAX 469 # define FILE_BYTES_MAX (1024 * 1024) /* how much of the file to look at */ 470 #endif 471 #define FILE_ELF_NOTES_MAX 256 472 #define FILE_ELF_PHNUM_MAX 2048 473 #define FILE_ELF_SHNUM_MAX 32768 474 #define FILE_INDIR_MAX 50 475 #define FILE_NAME_MAX 50 476 #define FILE_REGEX_MAX 8192 477 #define FILE_ENCODING_MAX (64 * 1024) 478 }; 479 480 /* Type for Unicode characters */ 481 typedef unsigned long file_unichar_t; 482 483 struct stat; 484 #define FILE_T_LOCAL 1 485 #define FILE_T_WINDOWS 2 486 protected const char *file_fmttime(char *, size_t, uint64_t, int); 487 protected struct magic_set *file_ms_alloc(int); 488 protected void file_ms_free(struct magic_set *); 489 protected int file_default(struct magic_set *, size_t); 490 protected int file_buffer(struct magic_set *, int, struct stat *, const char *, 491 const void *, size_t); 492 protected int file_fsmagic(struct magic_set *, const char *, struct stat *); 493 protected int file_pipe2file(struct magic_set *, int, const void *, size_t); 494 protected int file_vprintf(struct magic_set *, const char *, va_list) 495 __attribute__((__format__(__printf__, 2, 0))); 496 protected int file_separator(struct magic_set *); 497 protected char *file_copystr(char *, size_t, size_t, const char *); 498 protected int file_checkfmt(char *, size_t, const char *); 499 protected size_t file_printedlen(const struct magic_set *); 500 protected int file_print_guid(char *, size_t, const uint64_t *); 501 protected int file_parse_guid(const char *, uint64_t *); 502 protected int file_replace(struct magic_set *, const char *, const char *); 503 protected int file_printf(struct magic_set *, const char *, ...) 504 __attribute__((__format__(__printf__, 2, 3))); 505 protected int file_reset(struct magic_set *, int); 506 protected int file_tryelf(struct magic_set *, const struct buffer *); 507 protected int file_trycdf(struct magic_set *, const struct buffer *); 508 #if HAVE_FORK 509 protected int file_zmagic(struct magic_set *, const struct buffer *, 510 const char *); 511 #endif 512 protected int file_ascmagic(struct magic_set *, const struct buffer *, 513 int); 514 protected int file_ascmagic_with_encoding(struct magic_set *, 515 const struct buffer *, file_unichar_t *, size_t, const char *, const char *, int); 516 protected int file_encoding(struct magic_set *, const struct buffer *, 517 file_unichar_t **, size_t *, const char **, const char **, const char **); 518 protected int file_is_json(struct magic_set *, const struct buffer *); 519 protected int file_is_csv(struct magic_set *, const struct buffer *, int); 520 protected int file_is_tar(struct magic_set *, const struct buffer *); 521 protected int file_softmagic(struct magic_set *, const struct buffer *, 522 uint16_t *, uint16_t *, int, int); 523 protected int file_apprentice(struct magic_set *, const char *, int); 524 protected int buffer_apprentice(struct magic_set *, struct magic **, 525 size_t *, size_t); 526 protected int file_magicfind(struct magic_set *, const char *, struct mlist *); 527 protected uint64_t file_signextend(struct magic_set *, struct magic *, 528 uint64_t); 529 protected void file_badread(struct magic_set *); 530 protected void file_badseek(struct magic_set *); 531 protected void file_oomem(struct magic_set *, size_t); 532 protected void file_error(struct magic_set *, int, const char *, ...) 533 __attribute__((__format__(__printf__, 3, 4))); 534 protected void file_magerror(struct magic_set *, const char *, ...) 535 __attribute__((__format__(__printf__, 2, 3))); 536 protected void file_magwarn(struct magic_set *, const char *, ...) 537 __attribute__((__format__(__printf__, 2, 3))); 538 protected void file_mdump(struct magic *); 539 protected void file_showstr(FILE *, const char *, size_t); 540 protected size_t file_mbswidth(const char *); 541 protected const char *file_getbuffer(struct magic_set *); 542 protected ssize_t sread(int, void *, size_t, int); 543 protected int file_check_mem(struct magic_set *, unsigned int); 544 protected int file_looks_utf8(const unsigned char *, size_t, file_unichar_t *, 545 size_t *); 546 protected size_t file_pstring_length_size(struct magic_set *, 547 const struct magic *); 548 protected size_t file_pstring_get_length(struct magic_set *, 549 const struct magic *, const char *); 550 protected char * file_printable(char *, size_t, const char *, size_t); 551 #ifdef __EMX__ 552 protected int file_os2_apptype(struct magic_set *, const char *, const void *, 553 size_t); 554 #endif /* __EMX__ */ 555 protected int file_pipe_closexec(int *); 556 protected int file_clear_closexec(int); 557 protected char *file_strtrim(char *); 558 559 protected void buffer_init(struct buffer *, int, const struct stat *, 560 const void *, size_t); 561 protected void buffer_fini(struct buffer *); 562 protected int buffer_fill(const struct buffer *); 563 564 #include <locale.h> 565 #if defined(HAVE_XLOCALE_H) 566 #include <xlocale.h> 567 #endif 568 569 typedef struct { 570 const char *pat; 571 #if defined(HAVE_NEWLOCALE) && defined(HAVE_USELOCALE) && defined(HAVE_FREELOCALE) 572 #define USE_C_LOCALE 573 locale_t old_lc_ctype; 574 locale_t c_lc_ctype; 575 #else 576 char *old_lc_ctype; 577 #endif 578 int rc; 579 regex_t rx; 580 } file_regex_t; 581 582 protected int file_regcomp(file_regex_t *, const char *, int); 583 protected int file_regexec(file_regex_t *, const char *, size_t, regmatch_t *, 584 int); 585 protected void file_regfree(file_regex_t *); 586 protected void file_regerror(file_regex_t *, int, struct magic_set *); 587 588 typedef struct { 589 char *buf; 590 size_t blen; 591 uint32_t offset; 592 } file_pushbuf_t; 593 594 protected file_pushbuf_t *file_push_buffer(struct magic_set *); 595 protected char *file_pop_buffer(struct magic_set *, file_pushbuf_t *); 596 597 #ifndef COMPILE_ONLY 598 extern const char *file_names[]; 599 extern const size_t file_nnames; 600 #endif 601 602 #ifndef HAVE_PREAD 603 ssize_t pread(int, void *, size_t, off_t); 604 #endif 605 #ifndef HAVE_VASPRINTF 606 int vasprintf(char **, const char *, va_list); 607 #endif 608 #ifndef HAVE_ASPRINTF 609 int asprintf(char **, const char *, ...); 610 #endif 611 #ifndef HAVE_DPRINTF 612 int dprintf(int, const char *, ...); 613 #endif 614 615 #ifndef HAVE_STRLCPY 616 size_t strlcpy(char *, const char *, size_t); 617 #endif 618 #ifndef HAVE_STRLCAT 619 size_t strlcat(char *, const char *, size_t); 620 #endif 621 #ifndef HAVE_STRCASESTR 622 char *strcasestr(const char *, const char *); 623 #endif 624 #ifndef HAVE_GETLINE 625 ssize_t getline(char **, size_t *, FILE *); 626 ssize_t getdelim(char **, size_t *, int, FILE *); 627 #endif 628 #ifndef HAVE_CTIME_R 629 char *ctime_r(const time_t *, char *); 630 #endif 631 #ifndef HAVE_ASCTIME_R 632 char *asctime_r(const struct tm *, char *); 633 #endif 634 #ifndef HAVE_GMTIME_R 635 struct tm *gmtime_r(const time_t *, struct tm *); 636 #endif 637 #ifndef HAVE_LOCALTIME_R 638 struct tm *localtime_r(const time_t *, struct tm *); 639 #endif 640 #ifndef HAVE_FMTCHECK 641 const char *fmtcheck(const char *, const char *) 642 __attribute__((__format_arg__(2))); 643 #endif 644 645 #ifdef HAVE_LIBSECCOMP 646 // basic filter 647 // this mode should not interfere with normal operations 648 // only some dangerous syscalls are blacklisted 649 int enable_sandbox_basic(void); 650 651 // enhanced filter 652 // this mode allows only the necessary syscalls used during normal operation 653 // extensive testing required !!! 654 int enable_sandbox_full(void); 655 #endif 656 657 protected const char *file_getprogname(void); 658 protected void file_setprogname(const char *); 659 protected void file_err(int, const char *, ...) 660 __attribute__((__format__(__printf__, 2, 3), __noreturn__)); 661 protected void file_errx(int, const char *, ...) 662 __attribute__((__format__(__printf__, 2, 3), __noreturn__)); 663 protected void file_warn(const char *, ...) 664 __attribute__((__format__(__printf__, 1, 2))); 665 protected void file_warnx(const char *, ...) 666 __attribute__((__format__(__printf__, 1, 2))); 667 668 #if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK) 669 #define QUICK 670 #endif 671 672 #ifndef O_BINARY 673 #define O_BINARY 0 674 #endif 675 #ifndef O_NONBLOCK 676 #define O_NONBLOCK 0 677 #endif 678 679 #ifndef __cplusplus 680 #if defined(__GNUC__) && (__GNUC__ >= 3) 681 #define FILE_RCSID(id) \ 682 static const char rcsid[] __attribute__((__used__)) = id; 683 #else 684 #define FILE_RCSID(id) \ 685 static const char *rcsid(const char *p) { \ 686 return rcsid(p = id); \ 687 } 688 #endif 689 #else 690 #define FILE_RCSID(id) 691 #endif 692 #ifndef __RCSID 693 #define __RCSID(a) 694 #endif 695 696 #endif /* __file_h__ */ 697