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archived-php-src/ext/fileinfo/libmagic/file.h
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Michael Orlitzky 0401fb3a75 [fileinfo] Hide libmagic dynamic symbols 
When libphp.so (from the embed SAPI, or the apache module) is loaded
by another project that already uses libmagic, the symbols from the
two copies of libmagic...

  $ objdump -TC ./libs/libphp.so | grep '\smagic_'
  00000000002b2754 g  DF .text	0000000000000034  Base  magic_compile
  00000000002b25fe g  DF .text	0000000000000024  Base  magic_open
  00000000002b27f0 g  DF .text	0000000000000034  Base  magic_descriptor
  00000000002b2720 g  DF .text	0000000000000034  Base  magic_load
  00000000002b2c1a g  DF .text	0000000000000032  Base  magic_setflags
  00000000002b27bc g  DF .text	0000000000000034  Base  magic_list
  00000000002b2c62 g  DF .text	0000000000000206  Base  magic_setparam
  00000000002b2bf4 g  DF .text	0000000000000026  Base  magic_getflags
  00000000002b2bbe g  DF .text	0000000000000036  Base  magic_errno
  00000000002b2e68 g  DF .text	00000000000001f4  Base  magic_getparam
  00000000002b2b14 g  DF .text	000000000000006e  Base  magic_buffer
  00000000002b2b82 g  DF .text	000000000000003c  Base  magic_error
  00000000002b2788 g  DF .text	0000000000000034  Base  magic_check
  00000000002b2c4c g  DF .text	0000000000000016  Base  magic_version
  00000000002b26fa g  DF .text	0000000000000026  Base  magic_close
  00000000002b2858 g  DF .text	0000000000000034  Base  magic_stream
  00000000002b2824 g  DF .text	0000000000000034  Base  magic_file

can clash. To see this, we (pointlessly) link libphp.so from the
embed SAPI into a small program using the system copy of libmagic:

  $ gcc $(/usr/lib/php8.5/bin/php-config --includes) main.c \
    -L/usr/lib/php8.5/lib -lphp -lmagic
  $ LD_LIBRARY_PATH=/usr/lib/php8.5/lib ./a.out
  Segmentation fault         LD_LIBRARY_PATH=/usr/lib/php8.5/lib ./a.out

To avoid this, we modify the internal "file_public" macro used by
libmagic, so that (on platforms that support it) hidden visibility is
used instead of the default. Afterwards the objdump command above
produces no output, and the test program no longer sefaults.

Co-authored-by:  Ilija Tovilo <ilija.tovilo@me.com>
PHP-bug: https://bugs.php.net/bug.php?id=66095
Gentoo-bug: https://bugs.gentoo.org/471682

Fixes #66095
Closes GH-21472
2026-03-27 16:27:38 +01:00

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/*
* Copyright (c) Ian F. Darwin 1986-1995.
* Software written by Ian F. Darwin and others;
* maintained 1995-present by Christos Zoulas and others.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* file.h - definitions for file(1) program
* @(#)$File: file.h,v 1.257 2024/11/25 22:31:53 christos Exp $
*/
#ifndef __file_h__
#define __file_h__
#include "config.h"
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#ifdef _WIN32
# ifdef PRIu32
# ifdef _WIN64
# define SIZE_T_FORMAT PRIu64
# else
# define SIZE_T_FORMAT PRIu32
# endif
# define INT64_T_FORMAT PRIi64
# define INTMAX_T_FORMAT PRIiMAX
# else
# ifdef _WIN64
# define SIZE_T_FORMAT "I64"
# else
# define SIZE_T_FORMAT ""
# endif
# define INT64_T_FORMAT "I64"
# define INTMAX_T_FORMAT "I64"
# endif
#else
# define SIZE_T_FORMAT "z"
# define INT64_T_FORMAT "ll"
# define INTMAX_T_FORMAT "j"
#endif
#include <stdio.h> /* Include that here, to make sure __P gets defined */
#include <errno.h>
#include <fcntl.h> /* For open and flags */
#include <sys/types.h>
#ifndef WIN32
#include <sys/param.h>
#endif
/* Do this here and now, because struct stat gets re-defined on solaris */
#include <sys/stat.h>
#include <stdarg.h>
#define ENABLE_CONDITIONALS
#ifndef MAGIC
#define MAGIC "/etc/magic"
#endif
#if defined(__EMX__) || defined (WIN32)
#define PATHSEP ';'
#else
#define PATHSEP ':'
#endif
#define file_private static
#if HAVE_VISIBILITY
# if defined(WIN32)
# define file_public
# ifndef file_protected
# define file_protected
# endif
# else
# define file_public __attribute__((__visibility__("hidden")))
# ifndef file_protected
# define file_protected __attribute__((__visibility__("hidden")))
# endif
# endif
#else
# define file_public
# ifndef file_protected
# define file_protected
# endif
#endif
#ifndef __arraycount
#define __arraycount(a) (sizeof(a) / sizeof(a[0]))
#endif
#ifndef __GNUC_PREREQ__
#ifdef __GNUC__
#define __GNUC_PREREQ__(x, y) \
((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
(__GNUC__ > (x)))
#else
#define __GNUC_PREREQ__(x, y) 0
#endif
#endif
#ifndef __GNUC__
#ifndef __attribute__
#define __attribute__(a)
#endif
#endif
#ifndef MIN
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif
#ifndef O_CLOEXEC
# define O_CLOEXEC 0
#endif
#ifndef FD_CLOEXEC
# define FD_CLOEXEC 1
#endif
/*
* Dec 31, 23:59:59 9999
* we need to make sure that we don't exceed 9999 because some libc
* implementations like muslc crash otherwise. If you are unlucky
* to be running on a system with a 32 bit time_t, then it is even less.
*/
#define MAX_CTIME \
CAST(time_t, sizeof(time_t) > 4 ? 0x3afff487cfULL : 0x7fffffffULL)
#define FILE_BADSIZE CAST(size_t, ~0ul)
#define MAXDESC 64 /* max len of text description/MIME type */
#define MAXMIME 80 /* max len of text MIME type */
#define MAXEXT 120 /* max len of text extensions */
#define MAXstring 128 /* max len of "string" types */
#define MAGICNO 0xF11E041C
#define VERSIONNO 19
#define FILE_MAGICSIZE 432
#define FILE_GUID_SIZE sizeof("XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX")
#define FILE_LOAD 0
#define FILE_CHECK 1
#define FILE_COMPILE 2
#define FILE_LIST 3
struct buffer {
int fd;
zend_stat_t st;
const void *fbuf;
size_t flen;
zend_off_t eoff;
void *ebuf;
size_t elen;
};
union VALUETYPE {
uint8_t b;
uint16_t h;
uint32_t l;
uint64_t q;
uint8_t hs[2]; /* 2 bytes of a fixed-endian "short" */
uint8_t hl[4]; /* 4 bytes of a fixed-endian "long" */
uint8_t hq[8]; /* 8 bytes of a fixed-endian "quad" */
char s[MAXstring]; /* the search string or regex pattern */
unsigned char us[MAXstring];
uint64_t guid[2];
float f;
double d;
};
struct magic {
/* Word 1 */
uint16_t cont_level; /* level of ">" */
uint8_t flag;
#define INDIR 0x01 /* if '(...)' appears */
#define OFFADD 0x02 /* if '>&' or '>...(&' appears */
#define INDIROFFADD 0x04 /* if '>&(' appears */
#define UNSIGNED 0x08 /* comparison is unsigned */
#define NOSPACE 0x10 /* suppress space character before output */
#define BINTEST 0x20 /* test is for a binary type (set only
for top-level tests) */
#define TEXTTEST 0x40 /* for passing to file_softmagic */
#define OFFNEGATIVE 0x80 /* relative to the end of file */
uint8_t factor;
/* Word 2 */
uint8_t reln; /* relation (0=eq, '>'=gt, etc) */
uint8_t vallen; /* length of string value, if any */
uint8_t type; /* comparison type (FILE_*) */
uint8_t in_type; /* type of indirection */
#define FILE_INVALID 0
#define FILE_BYTE 1
#define FILE_SHORT 2
#define FILE_DEFAULT 3
#define FILE_LONG 4
#define FILE_STRING 5
#define FILE_DATE 6
#define FILE_BESHORT 7
#define FILE_BELONG 8
#define FILE_BEDATE 9
#define FILE_LESHORT 10
#define FILE_LELONG 11
#define FILE_LEDATE 12
#define FILE_PSTRING 13
#define FILE_LDATE 14
#define FILE_BELDATE 15
#define FILE_LELDATE 16
#define FILE_REGEX 17
#define FILE_BESTRING16 18
#define FILE_LESTRING16 19
#define FILE_SEARCH 20
#define FILE_MEDATE 21
#define FILE_MELDATE 22
#define FILE_MELONG 23
#define FILE_QUAD 24
#define FILE_LEQUAD 25
#define FILE_BEQUAD 26
#define FILE_QDATE 27
#define FILE_LEQDATE 28
#define FILE_BEQDATE 29
#define FILE_QLDATE 30
#define FILE_LEQLDATE 31
#define FILE_BEQLDATE 32
#define FILE_FLOAT 33
#define FILE_BEFLOAT 34
#define FILE_LEFLOAT 35
#define FILE_DOUBLE 36
#define FILE_BEDOUBLE 37
#define FILE_LEDOUBLE 38
#define FILE_BEID3 39
#define FILE_LEID3 40
#define FILE_INDIRECT 41
#define FILE_QWDATE 42
#define FILE_LEQWDATE 43
#define FILE_BEQWDATE 44
#define FILE_NAME 45
#define FILE_USE 46
#define FILE_CLEAR 47
#define FILE_DER 48
#define FILE_GUID 49
#define FILE_OFFSET 50
#define FILE_BEVARINT 51
#define FILE_LEVARINT 52
#define FILE_MSDOSDATE 53
#define FILE_LEMSDOSDATE 54
#define FILE_BEMSDOSDATE 55
#define FILE_MSDOSTIME 56
#define FILE_LEMSDOSTIME 57
#define FILE_BEMSDOSTIME 58
#define FILE_OCTAL 59
#define FILE_NAMES_SIZE 60 /* size of array to contain all names */
#define IS_LIBMAGIC_STRING(t) \
((t) == FILE_STRING || \
(t) == FILE_PSTRING || \
(t) == FILE_BESTRING16 || \
(t) == FILE_LESTRING16 || \
(t) == FILE_REGEX || \
(t) == FILE_SEARCH || \
(t) == FILE_INDIRECT || \
(t) == FILE_NAME || \
(t) == FILE_USE || \
(t) == FILE_OCTAL)
#define FILE_FMT_NONE 0
#define FILE_FMT_NUM 1 /* "cduxXi" */
#define FILE_FMT_STR 2 /* "s" */
#define FILE_FMT_QUAD 3 /* "ll" */
#define FILE_FMT_FLOAT 4 /* "eEfFgG" */
#define FILE_FMT_DOUBLE 5 /* "eEfFgG" */
/* Word 3 */
uint8_t in_op; /* operator for indirection */
uint8_t mask_op; /* operator for mask */
#ifdef ENABLE_CONDITIONALS
uint8_t cond; /* conditional type */
#else
uint8_t dummy;
#endif
uint8_t factor_op;
#define FILE_FACTOR_OP_PLUS '+'
#define FILE_FACTOR_OP_MINUS '-'
#define FILE_FACTOR_OP_TIMES '*'
#define FILE_FACTOR_OP_DIV '/'
#define FILE_FACTOR_OP_NONE '\0'
#define FILE_OPS "&|^+-*/%"
#define FILE_OPAND 0
#define FILE_OPOR 1
#define FILE_OPXOR 2
#define FILE_OPADD 3
#define FILE_OPMINUS 4
#define FILE_OPMULTIPLY 5
#define FILE_OPDIVIDE 6
#define FILE_OPMODULO 7
#define FILE_OPS_MASK 0x07 /* mask for above ops */
#define FILE_UNUSED_1 0x08
#define FILE_UNUSED_2 0x10
#define FILE_OPSIGNED 0x20
#define FILE_OPINVERSE 0x40
#define FILE_OPINDIRECT 0x80
#ifdef ENABLE_CONDITIONALS
#define COND_NONE 0
#define COND_IF 1
#define COND_ELIF 2
#define COND_ELSE 3
#endif /* ENABLE_CONDITIONALS */
/* Word 4 */
int32_t offset; /* offset to magic number */
/* Word 5 */
int32_t in_offset; /* offset from indirection */
/* Word 6 */
uint32_t lineno; /* line number in magic file */
/* Word 7,8 */
union {
uint64_t _mask; /* for use with numeric and date types */
struct {
uint32_t _count; /* repeat/line count */
uint32_t _flags; /* modifier flags */
} _s; /* for use with string types */
} _u;
#define num_mask _u._mask
#define str_range _u._s._count
#define str_flags _u._s._flags
/* Words 9-24 */
union VALUETYPE value; /* either number or string */
/* Words 25-40 */
char desc[MAXDESC]; /* description */
/* Words 41-60 */
char mimetype[MAXMIME]; /* MIME type */
/* Words 61-62 */
char apple[8]; /* APPLE CREATOR/TYPE */
/* Words 63-78 */
char ext[MAXEXT]; /* Popular extensions from old 64 raised by 56 for sqlite/sqlite3/... */
};
#define BIT(A) (1 << (A))
#define STRING_COMPACT_WHITESPACE BIT(0)
#define STRING_COMPACT_OPTIONAL_WHITESPACE BIT(1)
#define STRING_IGNORE_LOWERCASE BIT(2)
#define STRING_IGNORE_UPPERCASE BIT(3)
#define REGEX_OFFSET_START BIT(4)
#define STRING_TEXTTEST BIT(5)
#define STRING_BINTEST BIT(6)
#define PSTRING_1_BE BIT(7)
#define PSTRING_1_LE BIT(7)
#define PSTRING_2_BE BIT(8)
#define PSTRING_2_LE BIT(9)
#define PSTRING_4_BE BIT(10)
#define PSTRING_4_LE BIT(11)
#define REGEX_LINE_COUNT BIT(11)
#define PSTRING_LEN \
(PSTRING_1_BE|PSTRING_2_LE|PSTRING_2_BE|PSTRING_4_LE|PSTRING_4_BE)
#define PSTRING_LENGTH_INCLUDES_ITSELF BIT(12)
#define STRING_TRIM BIT(13)
#define STRING_FULL_WORD BIT(14)
#define CHAR_COMPACT_WHITESPACE 'W'
#define CHAR_COMPACT_OPTIONAL_WHITESPACE 'w'
#define CHAR_IGNORE_LOWERCASE 'c'
#define CHAR_IGNORE_UPPERCASE 'C'
#define CHAR_REGEX_OFFSET_START 's'
#define CHAR_TEXTTEST 't'
#define CHAR_TRIM 'T'
#define CHAR_FULL_WORD 'f'
#define CHAR_BINTEST 'b'
#define CHAR_PSTRING_1_BE 'B'
#define CHAR_PSTRING_1_LE 'B'
#define CHAR_PSTRING_2_BE 'H'
#define CHAR_PSTRING_2_LE 'h'
#define CHAR_PSTRING_4_BE 'L'
#define CHAR_PSTRING_4_LE 'l'
#define CHAR_PSTRING_LENGTH_INCLUDES_ITSELF 'J'
#define STRING_IGNORE_CASE (STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
#define STRING_DEFAULT_RANGE 100
#define INDIRECT_RELATIVE BIT(0)
#define CHAR_INDIRECT_RELATIVE 'r'
/* list of magic entries */
struct mlist {
struct magic *magic; /* array of magic entries */
size_t nmagic; /* number of entries in array */
void *map; /* internal resources used by entry */
struct mlist *next, *prev;
};
#ifdef __cplusplus
#define CAST(T, b) static_cast<T>(b)
#define RCAST(T, b) reinterpret_cast<T>(b)
#define CCAST(T, b) const_cast<T>(b)
#else
#define CAST(T, b) ((T)(b))
#define RCAST(T, b) ((T)(uintptr_t)(b))
#define CCAST(T, b) ((T)(uintptr_t)(b))
#endif
struct level_info {
int32_t off;
int got_match;
#ifdef ENABLE_CONDITIONALS
int last_match;
int last_cond; /* used for error checking by parse() */
#endif
};
struct cont {
size_t len;
struct level_info *li;
};
#define MAGIC_SETS 2
struct magic_set {
struct mlist *mlist[MAGIC_SETS]; /* list of regular entries */
struct cont c;
struct out {
char *buf; /* Accumulation buffer */
size_t blen; /* Length of buffer */
char *pbuf; /* Printable buffer */
} o;
uint32_t offset; /* a copy of m->offset while we */
/* are working on the magic entry */
uint32_t eoffset; /* offset from end of file */
int error;
int flags; /* Control magic tests. */
int event_flags; /* Note things that happened. */
#define EVENT_HAD_ERR 0x01
const char *file;
size_t line; /* current magic line number */
mode_t mode; /* copy of current stat mode */
uint16_t magwarn; /* current number of warnings */
/* data for searches */
struct {
const char *s; /* start of search in original source */
size_t s_len; /* length of search region */
size_t offset; /* starting offset in source: XXX - should this be off_t? */
size_t rm_len; /* match length */
} search;
/* FIXME: Make the string dynamically allocated so that e.g.
strings matched in files can be longer than MAXstring */
union VALUETYPE ms_value; /* either number or string */
uint16_t indir_max;
uint16_t name_max;
uint16_t elf_shnum_max;
uint16_t elf_phnum_max;
uint16_t elf_notes_max;
uint16_t regex_max;
uint16_t magwarn_max;
size_t bytes_max; /* number of bytes to read from file */
size_t encoding_max; /* bytes to look for encoding */
size_t elf_shsize_max;
#ifndef FILE_BYTES_MAX
# define FILE_BYTES_MAX (7 * 1024 * 1024)/* how much of the file to look at */
#endif /* above 0x6ab0f4 map offset for HelveticaNeue.dfont */
#define FILE_ELF_NOTES_MAX 256
#define FILE_ELF_PHNUM_MAX 2048
#define FILE_ELF_SHNUM_MAX 32768
#define FILE_ELF_SHSIZE_MAX (128 * 1024 * 1024)
#define FILE_INDIR_MAX 50
#define FILE_NAME_MAX 100
#define FILE_REGEX_MAX 8192
#define FILE_ENCODING_MAX (64 * 1024)
#define FILE_MAGWARN_MAX 64
#if defined(HAVE_NEWLOCALE) && defined(HAVE_USELOCALE) && defined(HAVE_FREELOCALE)
#define USE_C_LOCALE
locale_t c_lc_ctype;
#define file_locale_used
#else
#define file_locale_used __attribute__((__unused__))
#endif
};
/* Type for Unicode characters */
typedef unsigned long file_unichar_t;
struct stat;
#define FILE_T_LOCAL 1
#define FILE_T_WINDOWS 2
file_protected const char *file_fmtdatetime(char *, size_t, uint64_t, int);
file_protected const char *file_fmtdate(char *, size_t, uint16_t);
file_protected const char *file_fmttime(char *, size_t, uint16_t);
file_protected const char *file_fmtvarint(char *, size_t, const unsigned char *,
int);
file_protected const char *file_fmtnum(char *, size_t, const char *, int);
file_protected struct magic_set *file_ms_alloc(int);
file_protected void file_ms_free(struct magic_set *);
file_protected int file_buffer(struct magic_set *, php_stream *, zend_stat_t *, const char *, const void *,
size_t);
file_protected int file_fsmagic(struct magic_set *, const char *, zend_stat_t *);
file_protected int file_pipe2file(struct magic_set *, int, const void *,
size_t);
file_protected int file_vprintf(struct magic_set *, const char *, va_list)
__attribute__((__format__(__printf__, 2, 0)));
file_protected int file_separator(struct magic_set *);
file_protected char *file_copystr(char *, size_t, size_t, const char *);
file_protected int file_checkfmt(char *, size_t, const char *);
file_protected size_t file_printedlen(const struct magic_set *);
file_protected int file_print_guid(char *, size_t, const uint64_t *);
file_protected int file_parse_guid(const char *, uint64_t *);
file_protected int file_replace(struct magic_set *, const char *, const char *);
file_protected int file_printf(struct magic_set *, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
file_protected int file_reset(struct magic_set *, int);
file_protected int file_tryelf(struct magic_set *, const struct buffer *);
file_protected int file_trycdf(struct magic_set *, const struct buffer *);
#ifdef PHP_FILEINFO_UNCOMPRESS
file_protected int file_zmagic(struct magic_set *, const struct buffer *,
const char *);
#endif
file_protected int file_ascmagic(struct magic_set *, const struct buffer *,
int);
file_protected int file_ascmagic_with_encoding(struct magic_set *,
const struct buffer *, file_unichar_t *, size_t, const char *, const char *, int);
file_protected int file_encoding(struct magic_set *, const struct buffer *,
file_unichar_t **, size_t *, const char **, const char **, const char **);
file_protected int file_is_json(struct magic_set *, const struct buffer *);
file_protected int file_is_csv(struct magic_set *, const struct buffer *, int,
const char *);
file_protected int file_is_simh(struct magic_set *, const struct buffer *);
file_protected int file_is_tar(struct magic_set *, const struct buffer *);
file_protected int file_softmagic(struct magic_set *, const struct buffer *,
uint16_t *, uint16_t *, int, int);
file_protected int file_apprentice(struct magic_set *, const char *, int);
file_protected size_t file_magic_strength(const struct magic *, size_t);
file_protected int buffer_apprentice(struct magic_set *, struct magic **,
size_t *, size_t);
file_protected int file_magicfind(struct magic_set *, const char *,
struct mlist *);
file_protected uint64_t file_signextend(struct magic_set *, struct magic *,
uint64_t);
file_protected uintmax_t file_varint2uintmax_t(const unsigned char *, int,
size_t *);
file_protected void file_badread(struct magic_set *);
file_protected void file_badseek(struct magic_set *);
file_protected void file_oomem(struct magic_set *, size_t);
file_protected void file_error(struct magic_set *, int, const char *, ...)
__attribute__((__format__(__printf__, 3, 4)));
file_protected void file_magerror(struct magic_set *, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
file_protected void file_magwarn(struct magic_set *, const char *, ...)
__attribute__((__format__(__printf__, 2, 3)));
file_protected void file_magwarn1(const char *, ...)
__attribute__((__format__(__printf__, 1, 2)));
file_protected void file_mdump(struct magic *);
file_protected void file_showstr(FILE *, const char *, size_t);
file_protected size_t file_mbswidth(struct magic_set *, const char *);
file_protected const char *file_getbuffer(struct magic_set *);
file_protected ssize_t sread(int, void *, size_t, int);
file_protected int file_check_mem(struct magic_set *, unsigned int);
file_protected int file_looks_utf8(const unsigned char *, size_t,
file_unichar_t *, size_t *);
file_protected size_t file_pstring_length_size(struct magic_set *,
const struct magic *);
file_protected size_t file_pstring_get_length(struct magic_set *,
const struct magic *, const char *);
file_protected char * file_printable(struct magic_set *, char *, size_t,
const char *, size_t);
#ifdef __EMX__
file_protected int file_os2_apptype(struct magic_set *, const char *,
const void *, size_t);
#endif /* __EMX__ */
file_protected int file_pipe_closexec(int *);
file_protected int file_clear_closexec(int);
file_protected char *file_strtrim(char *);
file_protected void buffer_init(struct buffer *, int, const zend_stat_t *,
const void *, size_t);
file_protected void buffer_fini(struct buffer *);
file_protected int buffer_fill(const struct buffer *);
typedef struct {
char *buf;
size_t blen;
uint32_t offset;
} file_pushbuf_t;
file_protected file_pushbuf_t *file_push_buffer(struct magic_set *);
file_protected char *file_pop_buffer(struct magic_set *, file_pushbuf_t *);
#ifndef COMPILE_ONLY
extern file_protected const char *file_names[];
extern file_protected const size_t file_nnames;
#endif
#ifndef HAVE_STRLCPY
size_t strlcpy(char *, const char *, size_t);
#endif
#ifndef HAVE_STRLCAT
size_t strlcat(char *, const char *, size_t);
#endif
#ifndef HAVE_GETLINE
ssize_t getline(char **, size_t *, FILE *);
ssize_t getdelim(char **, size_t *, int, FILE *);
#endif
#ifndef HAVE_CTIME_R
char *ctime_r(const time_t *, char *);
#endif
#ifndef HAVE_ASCTIME_R
char *asctime_r(const struct tm *, char *);
#endif
#if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
#define QUICK
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_NONBLOCK
#define O_NONBLOCK 0
#endif
#ifndef __cplusplus
#if defined(__GNUC__) && (__GNUC__ >= 3)
#define FILE_RCSID(id) \
static const char rcsid[] __attribute__((__used__)) = id;
#else
#define FILE_RCSID(id) \
static const char *rcsid(const char *p) { \
return rcsid(p = id); \
}
#endif
#else
#define FILE_RCSID(id)
#endif
#ifndef __RCSID
#define __RCSID(a)
#endif
#endif /* __file_h__ */
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