file.h revision 290152
1181074Sdas/* 2181074Sdas * Copyright (c) Ian F. Darwin 1986-1995. 3181074Sdas * Software written by Ian F. Darwin and others; 4181074Sdas * maintained 1995-present by Christos Zoulas and others. 5181074Sdas * 6181074Sdas * Redistribution and use in source and binary forms, with or without 7181074Sdas * modification, are permitted provided that the following conditions 8181074Sdas * are met: 9181074Sdas * 1. Redistributions of source code must retain the above copyright 10181074Sdas * notice immediately at the beginning of the file, without modification, 11181074Sdas * this list of conditions, and the following disclaimer. 12181074Sdas * 2. Redistributions in binary form must reproduce the above copyright 13181074Sdas * notice, this list of conditions and the following disclaimer in the 14181074Sdas * documentation and/or other materials provided with the distribution. 15181074Sdas * 16181074Sdas * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17181074Sdas * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18181074Sdas * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19181074Sdas * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20181074Sdas * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21181074Sdas * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22181074Sdas * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23181074Sdas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24181074Sdas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25181074Sdas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26181074Sdas * SUCH DAMAGE. 27181074Sdas */ 28181074Sdas/* 29181074Sdas * file.h - definitions for file(1) program 30181074Sdas * @(#)$File: file.h,v 1.172 2015/09/11 17:24:09 christos Exp $ 31181074Sdas */ 32181074Sdas 33181074Sdas#ifndef __file_h__ 34181074Sdas#define __file_h__ 35181074Sdas 36181074Sdas#ifdef HAVE_CONFIG_H 37181074Sdas#include <config.h> 38181074Sdas#endif 39181074Sdas 40181074Sdas#ifdef WIN32 41181074Sdas #ifdef _WIN64 42181074Sdas #define SIZE_T_FORMAT "I64" 43181074Sdas #else 44181074Sdas #define SIZE_T_FORMAT "" 45181074Sdas #endif 46181074Sdas #define INT64_T_FORMAT "I64" 47181074Sdas #define INTMAX_T_FORMAT "I64" 48181074Sdas#else 49181074Sdas #define SIZE_T_FORMAT "z" 50181258Sdas #define INT64_T_FORMAT "ll" 51181258Sdas #define INTMAX_T_FORMAT "j" 52181258Sdas#endif 53181258Sdas 54181258Sdas#include <stdio.h> /* Include that here, to make sure __P gets defined */ 55181258Sdas#include <errno.h> 56181074Sdas#include <fcntl.h> /* For open and flags */ 57181074Sdas#ifdef HAVE_STDINT_H 58181074Sdas#ifndef __STDC_LIMIT_MACROS 59181074Sdas#define __STDC_LIMIT_MACROS 60181074Sdas#endif 61181074Sdas#include <stdint.h> 62181074Sdas#endif 63181074Sdas#ifdef HAVE_INTTYPES_H 64181074Sdas#include <inttypes.h> 65181074Sdas#endif 66181074Sdas#include <regex.h> 67181074Sdas#include <time.h> 68181074Sdas#include <sys/types.h> 69181074Sdas#ifndef WIN32 70181074Sdas#include <sys/param.h> 71181074Sdas#endif 72181074Sdas/* Do this here and now, because struct stat gets re-defined on solaris */ 73181074Sdas#include <sys/stat.h> 74181074Sdas#include <stdarg.h> 75181074Sdas 76181074Sdas#define ENABLE_CONDITIONALS 77181074Sdas 78#ifndef MAGIC 79#define MAGIC "/etc/magic" 80#endif 81 82#if defined(__EMX__) || defined (WIN32) 83#define PATHSEP ';' 84#else 85#define PATHSEP ':' 86#endif 87 88#define private static 89 90#if HAVE_VISIBILITY && !defined(WIN32) 91#define public __attribute__ ((__visibility__("default"))) 92#ifndef protected 93#define protected __attribute__ ((__visibility__("hidden"))) 94#endif 95#else 96#define public 97#ifndef protected 98#define protected 99#endif 100#endif 101 102#ifndef __arraycount 103#define __arraycount(a) (sizeof(a) / sizeof(a[0])) 104#endif 105 106#ifndef __GNUC_PREREQ__ 107#ifdef __GNUC__ 108#define __GNUC_PREREQ__(x, y) \ 109 ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \ 110 (__GNUC__ > (x))) 111#else 112#define __GNUC_PREREQ__(x, y) 0 113#endif 114#endif 115 116#ifndef __GNUC__ 117#ifndef __attribute__ 118#define __attribute__(a) 119#endif 120#endif 121 122#ifndef MIN 123#define MIN(a,b) (((a) < (b)) ? (a) : (b)) 124#endif 125 126#ifndef MAX 127#define MAX(a,b) (((a) > (b)) ? (a) : (b)) 128#endif 129 130#ifndef HOWMANY 131# define HOWMANY (1024 * 1024) /* how much of the file to look at */ 132#endif 133#define MAXMAGIS 8192 /* max entries in any one magic file 134 or directory */ 135#define MAXDESC 64 /* max len of text description/MIME type */ 136#define MAXMIME 80 /* max len of text MIME type */ 137#define MAXstring 64 /* max len of "string" types */ 138 139#define MAGICNO 0xF11E041C 140#define VERSIONNO 13 141#define FILE_MAGICSIZE 312 142 143#define FILE_LOAD 0 144#define FILE_CHECK 1 145#define FILE_COMPILE 2 146#define FILE_LIST 3 147 148union VALUETYPE { 149 uint8_t b; 150 uint16_t h; 151 uint32_t l; 152 uint64_t q; 153 uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */ 154 uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */ 155 uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */ 156 char s[MAXstring]; /* the search string or regex pattern */ 157 unsigned char us[MAXstring]; 158 float f; 159 double d; 160}; 161 162struct magic { 163 /* Word 1 */ 164 uint16_t cont_level; /* level of ">" */ 165 uint8_t flag; 166#define INDIR 0x01 /* if '(...)' appears */ 167#define OFFADD 0x02 /* if '>&' or '>...(&' appears */ 168#define INDIROFFADD 0x04 /* if '>&(' appears */ 169#define UNSIGNED 0x08 /* comparison is unsigned */ 170#define NOSPACE 0x10 /* suppress space character before output */ 171#define BINTEST 0x20 /* test is for a binary type (set only 172 for top-level tests) */ 173#define TEXTTEST 0x40 /* for passing to file_softmagic */ 174 175 uint8_t factor; 176 177 /* Word 2 */ 178 uint8_t reln; /* relation (0=eq, '>'=gt, etc) */ 179 uint8_t vallen; /* length of string value, if any */ 180 uint8_t type; /* comparison type (FILE_*) */ 181 uint8_t in_type; /* type of indirection */ 182#define FILE_INVALID 0 183#define FILE_BYTE 1 184#define FILE_SHORT 2 185#define FILE_DEFAULT 3 186#define FILE_LONG 4 187#define FILE_STRING 5 188#define FILE_DATE 6 189#define FILE_BESHORT 7 190#define FILE_BELONG 8 191#define FILE_BEDATE 9 192#define FILE_LESHORT 10 193#define FILE_LELONG 11 194#define FILE_LEDATE 12 195#define FILE_PSTRING 13 196#define FILE_LDATE 14 197#define FILE_BELDATE 15 198#define FILE_LELDATE 16 199#define FILE_REGEX 17 200#define FILE_BESTRING16 18 201#define FILE_LESTRING16 19 202#define FILE_SEARCH 20 203#define FILE_MEDATE 21 204#define FILE_MELDATE 22 205#define FILE_MELONG 23 206#define FILE_QUAD 24 207#define FILE_LEQUAD 25 208#define FILE_BEQUAD 26 209#define FILE_QDATE 27 210#define FILE_LEQDATE 28 211#define FILE_BEQDATE 29 212#define FILE_QLDATE 30 213#define FILE_LEQLDATE 31 214#define FILE_BEQLDATE 32 215#define FILE_FLOAT 33 216#define FILE_BEFLOAT 34 217#define FILE_LEFLOAT 35 218#define FILE_DOUBLE 36 219#define FILE_BEDOUBLE 37 220#define FILE_LEDOUBLE 38 221#define FILE_BEID3 39 222#define FILE_LEID3 40 223#define FILE_INDIRECT 41 224#define FILE_QWDATE 42 225#define FILE_LEQWDATE 43 226#define FILE_BEQWDATE 44 227#define FILE_NAME 45 228#define FILE_USE 46 229#define FILE_CLEAR 47 230#define FILE_NAMES_SIZE 48 /* size of array to contain all names */ 231 232#define IS_STRING(t) \ 233 ((t) == FILE_STRING || \ 234 (t) == FILE_PSTRING || \ 235 (t) == FILE_BESTRING16 || \ 236 (t) == FILE_LESTRING16 || \ 237 (t) == FILE_REGEX || \ 238 (t) == FILE_SEARCH || \ 239 (t) == FILE_INDIRECT || \ 240 (t) == FILE_NAME || \ 241 (t) == FILE_USE) 242 243#define FILE_FMT_NONE 0 244#define FILE_FMT_NUM 1 /* "cduxXi" */ 245#define FILE_FMT_STR 2 /* "s" */ 246#define FILE_FMT_QUAD 3 /* "ll" */ 247#define FILE_FMT_FLOAT 4 /* "eEfFgG" */ 248#define FILE_FMT_DOUBLE 5 /* "eEfFgG" */ 249 250 /* Word 3 */ 251 uint8_t in_op; /* operator for indirection */ 252 uint8_t mask_op; /* operator for mask */ 253#ifdef ENABLE_CONDITIONALS 254 uint8_t cond; /* conditional type */ 255#else 256 uint8_t dummy; 257#endif 258 uint8_t factor_op; 259#define FILE_FACTOR_OP_PLUS '+' 260#define FILE_FACTOR_OP_MINUS '-' 261#define FILE_FACTOR_OP_TIMES '*' 262#define FILE_FACTOR_OP_DIV '/' 263#define FILE_FACTOR_OP_NONE '\0' 264 265#define FILE_OPS "&|^+-*/%" 266#define FILE_OPAND 0 267#define FILE_OPOR 1 268#define FILE_OPXOR 2 269#define FILE_OPADD 3 270#define FILE_OPMINUS 4 271#define FILE_OPMULTIPLY 5 272#define FILE_OPDIVIDE 6 273#define FILE_OPMODULO 7 274#define FILE_OPS_MASK 0x07 /* mask for above ops */ 275#define FILE_UNUSED_1 0x08 276#define FILE_UNUSED_2 0x10 277#define FILE_UNUSED_3 0x20 278#define FILE_OPINVERSE 0x40 279#define FILE_OPINDIRECT 0x80 280 281#ifdef ENABLE_CONDITIONALS 282#define COND_NONE 0 283#define COND_IF 1 284#define COND_ELIF 2 285#define COND_ELSE 3 286#endif /* ENABLE_CONDITIONALS */ 287 288 /* Word 4 */ 289 uint32_t offset; /* offset to magic number */ 290 /* Word 5 */ 291 int32_t in_offset; /* offset from indirection */ 292 /* Word 6 */ 293 uint32_t lineno; /* line number in magic file */ 294 /* Word 7,8 */ 295 union { 296 uint64_t _mask; /* for use with numeric and date types */ 297 struct { 298 uint32_t _count; /* repeat/line count */ 299 uint32_t _flags; /* modifier flags */ 300 } _s; /* for use with string types */ 301 } _u; 302#define num_mask _u._mask 303#define str_range _u._s._count 304#define str_flags _u._s._flags 305 /* Words 9-24 */ 306 union VALUETYPE value; /* either number or string */ 307 /* Words 25-40 */ 308 char desc[MAXDESC]; /* description */ 309 /* Words 41-60 */ 310 char mimetype[MAXMIME]; /* MIME type */ 311 /* Words 61-62 */ 312 char apple[8]; /* APPLE CREATOR/TYPE */ 313 /* Words 63-78 */ 314 char ext[64]; /* Popular extensions */ 315}; 316 317#define BIT(A) (1 << (A)) 318#define STRING_COMPACT_WHITESPACE BIT(0) 319#define STRING_COMPACT_OPTIONAL_WHITESPACE BIT(1) 320#define STRING_IGNORE_LOWERCASE BIT(2) 321#define STRING_IGNORE_UPPERCASE BIT(3) 322#define REGEX_OFFSET_START BIT(4) 323#define STRING_TEXTTEST BIT(5) 324#define STRING_BINTEST BIT(6) 325#define PSTRING_1_BE BIT(7) 326#define PSTRING_1_LE BIT(7) 327#define PSTRING_2_BE BIT(8) 328#define PSTRING_2_LE BIT(9) 329#define PSTRING_4_BE BIT(10) 330#define PSTRING_4_LE BIT(11) 331#define REGEX_LINE_COUNT BIT(11) 332#define PSTRING_LEN \ 333 (PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE) 334#define PSTRING_LENGTH_INCLUDES_ITSELF BIT(12) 335#define STRING_TRIM BIT(13) 336#define CHAR_COMPACT_WHITESPACE 'W' 337#define CHAR_COMPACT_OPTIONAL_WHITESPACE 'w' 338#define CHAR_IGNORE_LOWERCASE 'c' 339#define CHAR_IGNORE_UPPERCASE 'C' 340#define CHAR_REGEX_OFFSET_START 's' 341#define CHAR_TEXTTEST 't' 342#define CHAR_TRIM 'T' 343#define CHAR_BINTEST 'b' 344#define CHAR_PSTRING_1_BE 'B' 345#define CHAR_PSTRING_1_LE 'B' 346#define CHAR_PSTRING_2_BE 'H' 347#define CHAR_PSTRING_2_LE 'h' 348#define CHAR_PSTRING_4_BE 'L' 349#define CHAR_PSTRING_4_LE 'l' 350#define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF 'J' 351#define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE) 352#define STRING_DEFAULT_RANGE 100 353 354#define INDIRECT_RELATIVE BIT(0) 355#define CHAR_INDIRECT_RELATIVE 'r' 356 357/* list of magic entries */ 358struct mlist { 359 struct magic *magic; /* array of magic entries */ 360 uint32_t nmagic; /* number of entries in array */ 361 void *map; /* internal resources used by entry */ 362 struct mlist *next, *prev; 363}; 364 365#ifdef __cplusplus 366#define CAST(T, b) static_cast<T>(b) 367#define RCAST(T, b) reinterpret_cast<T>(b) 368#else 369#define CAST(T, b) (T)(b) 370#define RCAST(T, b) (T)(b) 371#endif 372 373struct level_info { 374 int32_t off; 375 int got_match; 376#ifdef ENABLE_CONDITIONALS 377 int last_match; 378 int last_cond; /* used for error checking by parse() */ 379#endif 380}; 381 382#define MAGIC_SETS 2 383 384struct magic_set { 385 struct mlist *mlist[MAGIC_SETS]; /* list of regular entries */ 386 struct cont { 387 size_t len; 388 struct level_info *li; 389 } c; 390 struct out { 391 char *buf; /* Accumulation buffer */ 392 char *pbuf; /* Printable buffer */ 393 } o; 394 uint32_t offset; 395 int error; 396 int flags; /* Control magic tests. */ 397 int event_flags; /* Note things that happened. */ 398#define EVENT_HAD_ERR 0x01 399 const char *file; 400 size_t line; /* current magic line number */ 401 402 /* data for searches */ 403 struct { 404 const char *s; /* start of search in original source */ 405 size_t s_len; /* length of search region */ 406 size_t offset; /* starting offset in source: XXX - should this be off_t? */ 407 size_t rm_len; /* match length */ 408 } search; 409 410 /* FIXME: Make the string dynamically allocated so that e.g. 411 strings matched in files can be longer than MAXstring */ 412 union VALUETYPE ms_value; /* either number or string */ 413 uint16_t indir_max; 414 uint16_t name_max; 415 uint16_t elf_shnum_max; 416 uint16_t elf_phnum_max; 417 uint16_t elf_notes_max; 418 uint16_t regex_max; 419#define FILE_INDIR_MAX 15 420#define FILE_NAME_MAX 30 421#define FILE_ELF_SHNUM_MAX 32768 422#define FILE_ELF_PHNUM_MAX 2048 423#define FILE_ELF_NOTES_MAX 256 424#define FILE_REGEX_MAX 8192 425}; 426 427/* Type for Unicode characters */ 428typedef unsigned long unichar; 429 430struct stat; 431#define FILE_T_LOCAL 1 432#define FILE_T_WINDOWS 2 433protected const char *file_fmttime(uint64_t, int, char *); 434protected struct magic_set *file_ms_alloc(int); 435protected void file_ms_free(struct magic_set *); 436protected int file_buffer(struct magic_set *, int, const char *, const void *, 437 size_t); 438protected int file_fsmagic(struct magic_set *, const char *, struct stat *); 439protected int file_pipe2file(struct magic_set *, int, const void *, size_t); 440protected int file_vprintf(struct magic_set *, const char *, va_list) 441 __attribute__((__format__(__printf__, 2, 0))); 442protected size_t file_printedlen(const struct magic_set *); 443protected int file_replace(struct magic_set *, const char *, const char *); 444protected int file_printf(struct magic_set *, const char *, ...) 445 __attribute__((__format__(__printf__, 2, 3))); 446protected int file_reset(struct magic_set *); 447protected int file_tryelf(struct magic_set *, int, const unsigned char *, 448 size_t); 449protected int file_trycdf(struct magic_set *, int, const unsigned char *, 450 size_t); 451#if HAVE_FORK 452protected int file_zmagic(struct magic_set *, int, const char *, 453 const unsigned char *, size_t); 454#endif 455protected int file_ascmagic(struct magic_set *, const unsigned char *, size_t, 456 int); 457protected int file_ascmagic_with_encoding(struct magic_set *, 458 const unsigned char *, size_t, unichar *, size_t, const char *, 459 const char *, int); 460protected int file_encoding(struct magic_set *, const unsigned char *, size_t, 461 unichar **, size_t *, const char **, const char **, const char **); 462protected int file_is_tar(struct magic_set *, const unsigned char *, size_t); 463protected int file_softmagic(struct magic_set *, const unsigned char *, size_t, 464 uint16_t, uint16_t *, int, int); 465protected int file_apprentice(struct magic_set *, const char *, int); 466protected int buffer_apprentice(struct magic_set *, struct magic **, 467 size_t *, size_t); 468protected int file_magicfind(struct magic_set *, const char *, struct mlist *); 469protected uint64_t file_signextend(struct magic_set *, struct magic *, 470 uint64_t); 471protected void file_badread(struct magic_set *); 472protected void file_badseek(struct magic_set *); 473protected void file_oomem(struct magic_set *, size_t); 474protected void file_error(struct magic_set *, int, const char *, ...) 475 __attribute__((__format__(__printf__, 3, 4))); 476protected void file_magerror(struct magic_set *, const char *, ...) 477 __attribute__((__format__(__printf__, 2, 3))); 478protected void file_magwarn(struct magic_set *, const char *, ...) 479 __attribute__((__format__(__printf__, 2, 3))); 480protected void file_mdump(struct magic *); 481protected void file_showstr(FILE *, const char *, size_t); 482protected size_t file_mbswidth(const char *); 483protected const char *file_getbuffer(struct magic_set *); 484protected ssize_t sread(int, void *, size_t, int); 485protected int file_check_mem(struct magic_set *, unsigned int); 486protected int file_looks_utf8(const unsigned char *, size_t, unichar *, 487 size_t *); 488protected size_t file_pstring_length_size(const struct magic *); 489protected size_t file_pstring_get_length(const struct magic *, const char *); 490protected char * file_printable(char *, size_t, const char *); 491#ifdef __EMX__ 492protected int file_os2_apptype(struct magic_set *, const char *, const void *, 493 size_t); 494#endif /* __EMX__ */ 495 496#if defined(HAVE_LOCALE_H) 497#include <locale.h> 498#endif 499#if defined(HAVE_XLOCALE_H) 500#include <xlocale.h> 501#endif 502 503typedef struct { 504 const char *pat; 505#if defined(HAVE_NEWLOCALE) && defined(HAVE_USELOCALE) && defined(HAVE_FREELOCALE) 506#define USE_C_LOCALE 507 locale_t old_lc_ctype; 508 locale_t c_lc_ctype; 509#endif 510 int rc; 511 regex_t rx; 512} file_regex_t; 513 514protected int file_regcomp(file_regex_t *, const char *, int); 515protected int file_regexec(file_regex_t *, const char *, size_t, regmatch_t *, 516 int); 517protected void file_regfree(file_regex_t *); 518protected void file_regerror(file_regex_t *, int, struct magic_set *); 519 520typedef struct { 521 char *buf; 522 uint32_t offset; 523} file_pushbuf_t; 524 525protected file_pushbuf_t *file_push_buffer(struct magic_set *); 526protected char *file_pop_buffer(struct magic_set *, file_pushbuf_t *); 527 528#ifndef COMPILE_ONLY 529extern const char *file_names[]; 530extern const size_t file_nnames; 531#endif 532 533#ifndef HAVE_STRERROR 534extern int sys_nerr; 535extern char *sys_errlist[]; 536#define strerror(e) \ 537 (((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error") 538#endif 539 540#ifndef HAVE_STRTOUL 541#define strtoul(a, b, c) strtol(a, b, c) 542#endif 543 544#ifndef HAVE_PREAD 545ssize_t pread(int, void *, size_t, off_t); 546#endif 547#ifndef HAVE_VASPRINTF 548int vasprintf(char **, const char *, va_list); 549#endif 550#ifndef HAVE_ASPRINTF 551int asprintf(char **, const char *, ...); 552#endif 553 554#ifndef HAVE_STRLCPY 555size_t strlcpy(char *, const char *, size_t); 556#endif 557#ifndef HAVE_STRLCAT 558size_t strlcat(char *, const char *, size_t); 559#endif 560#ifndef HAVE_STRCASESTR 561char *strcasestr(const char *, const char *); 562#endif 563#ifndef HAVE_GETLINE 564ssize_t getline(char **, size_t *, FILE *); 565ssize_t getdelim(char **, size_t *, int, FILE *); 566#endif 567#ifndef HAVE_CTIME_R 568char *ctime_r(const time_t *, char *); 569#endif 570#ifndef HAVE_ASCTIME_R 571char *asctime_r(const struct tm *, char *); 572#endif 573#ifndef HAVE_GMTIME_R 574struct tm *gmtime_r(const time_t *, struct tm *); 575#endif 576#ifndef HAVE_LOCALTIME_R 577struct tm *localtime_r(const time_t *, struct tm *); 578#endif 579#ifndef HAVE_FMTCHECK 580const char *fmtcheck(const char *, const char *) 581 __attribute__((__format_arg__(2))); 582#endif 583 584#if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK) 585#define QUICK 586#endif 587 588#ifndef O_BINARY 589#define O_BINARY 0 590#endif 591 592#ifndef __cplusplus 593#if defined(__GNUC__) && (__GNUC__ >= 3) 594#define FILE_RCSID(id) \ 595static const char rcsid[] __attribute__((__used__)) = id; 596#else 597#define FILE_RCSID(id) \ 598static const char *rcsid(const char *p) { \ 599 return rcsid(p = id); \ 600} 601#endif 602#else 603#define FILE_RCSID(id) 604#endif 605#ifndef __RCSID 606#define __RCSID(a) 607#endif 608 609#endif /* __file_h__ */ 610