30bfee2630
This patch eliminates a number of #if 0 and #ifdef TODO blocks, macros that are never used, macros that provide portability to substrates that lack basic things like EINVAL and off_t, and other such debris. I preserved IO_DEBUG and CHECK_FILE, even though as far as I can tell IO_DEBUG is never defined and therefore CHECK_FILE never does anything, because it seems like we might actually want to turn it _on_. Installed stripped libraries and executables are unchanged, except, again, that the line number of an assertion changes (this time it's somewhere in fileops.c). * libio/libio.h (_IO_pos_BAD, _IO_pos_0, _IO_pos_adjust): Define here, unconditionally. * libio/iolibio.h (_IO_pos_BAD): Don't define here. * libio/libioP.h: Remove #if 0 blocks. (_IO_pos_BAD, _IO_pos_0, _IO_pos_adjust): Don't define here. (_IO_va_start, COERCE_FILE, MAYBE_SET_EINVAL): Don't define. (CHECK_FILE): Don't use MAYBE_SET_EINVAL or COERCE_FILE. Fix style. * libio/clearerr.c, libio/fputc.c, libio/getchar.c: Assume weak_alias is always defined. * libio/fileops.c, libio/genops.c, libio/oldfileops.c * libio/oldpclose.c, libio/pclose.c, libio/wfileops.c: Remove #if 0 and #ifdef TODO blocks. Assume text_set_element is always defined. * libio/iofdopen.c, libio/iogetdelim.c, libio/oldiofdopen.c Use __set_errno (EINVAL) instead of MAYBE_SET_EINVAL. * libio/tst-mmap-eofsync.c: Make #if 1 block unconditional.
843 lines
34 KiB
C
843 lines
34 KiB
C
/* Copyright (C) 1993-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>.
|
|
|
|
As a special exception, if you link the code in this file with
|
|
files compiled with a GNU compiler to produce an executable,
|
|
that does not cause the resulting executable to be covered by
|
|
the GNU Lesser General Public License. This exception does not
|
|
however invalidate any other reasons why the executable file
|
|
might be covered by the GNU Lesser General Public License.
|
|
This exception applies to code released by its copyright holders
|
|
in files containing the exception. */
|
|
|
|
/* NOTE: libio is now exclusively used only by glibc since libstdc++ has its
|
|
own implementation. As a result, functions that were implemented for C++
|
|
(like *sputn) may no longer have C++ semantics. This is of course only
|
|
relevant for internal callers of these functions since these functions are
|
|
not intended for external use otherwise.
|
|
|
|
FIXME: All of the C++ cruft eventually needs to go away. */
|
|
|
|
#ifndef _LIBIOP_H
|
|
#define _LIBIOP_H 1
|
|
|
|
#include <stddef.h>
|
|
|
|
#include <errno.h>
|
|
#include <libc-lock.h>
|
|
|
|
#include <math_ldbl_opt.h>
|
|
|
|
#include <stdio.h>
|
|
#include <libio/libio.h>
|
|
#include "iolibio.h"
|
|
|
|
#include <shlib-compat.h>
|
|
|
|
/* For historical reasons this is the name of the sysdeps header that
|
|
adjusts the libio configuration. */
|
|
#include <_G_config.h>
|
|
|
|
#define _IO_seek_set 0
|
|
#define _IO_seek_cur 1
|
|
#define _IO_seek_end 2
|
|
|
|
/* THE JUMPTABLE FUNCTIONS.
|
|
|
|
* The _IO_FILE type is used to implement the FILE type in GNU libc,
|
|
* as well as the streambuf class in GNU iostreams for C++.
|
|
* These are all the same, just used differently.
|
|
* An _IO_FILE (or FILE) object is allows followed by a pointer to
|
|
* a jump table (of pointers to functions). The pointer is accessed
|
|
* with the _IO_JUMPS macro. The jump table has an eccentric format,
|
|
* so as to be compatible with the layout of a C++ virtual function table.
|
|
* (as implemented by g++). When a pointer to a streambuf object is
|
|
* coerced to an (FILE*), then _IO_JUMPS on the result just
|
|
* happens to point to the virtual function table of the streambuf.
|
|
* Thus the _IO_JUMPS function table used for C stdio/libio does
|
|
* double duty as the virtual function table for C++ streambuf.
|
|
*
|
|
* The entries in the _IO_JUMPS function table (and hence also the
|
|
* virtual functions of a streambuf) are described below.
|
|
* The first parameter of each function entry is the _IO_FILE/streambuf
|
|
* object being acted on (i.e. the 'this' parameter).
|
|
*/
|
|
|
|
/* Setting this macro to 1 enables the use of the _vtable_offset bias
|
|
in _IO_JUMPS_FUNCS, below. This is only needed for new-format
|
|
_IO_FILE in libc that must support old binaries (see oldfileops.c). */
|
|
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) && !defined _IO_USE_OLD_IO_FILE
|
|
# define _IO_JUMPS_OFFSET 1
|
|
#else
|
|
# define _IO_JUMPS_OFFSET 0
|
|
#endif
|
|
|
|
/* Type of MEMBER in struct type TYPE. */
|
|
#define _IO_MEMBER_TYPE(TYPE, MEMBER) __typeof__ (((TYPE){}).MEMBER)
|
|
|
|
/* Essentially ((TYPE *) THIS)->MEMBER, but avoiding the aliasing
|
|
violation in case THIS has a different pointer type. */
|
|
#define _IO_CAST_FIELD_ACCESS(THIS, TYPE, MEMBER) \
|
|
(*(_IO_MEMBER_TYPE (TYPE, MEMBER) *)(((char *) (THIS)) \
|
|
+ offsetof(TYPE, MEMBER)))
|
|
|
|
#define _IO_JUMPS(THIS) (THIS)->vtable
|
|
#define _IO_JUMPS_FILE_plus(THIS) \
|
|
_IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE_plus, vtable)
|
|
#define _IO_WIDE_JUMPS(THIS) \
|
|
_IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE, _wide_data)->_wide_vtable
|
|
#define _IO_CHECK_WIDE(THIS) \
|
|
(_IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE, _wide_data) != NULL)
|
|
|
|
#if _IO_JUMPS_OFFSET
|
|
# define _IO_JUMPS_FUNC(THIS) \
|
|
(IO_validate_vtable \
|
|
(*(struct _IO_jump_t **) ((void *) &_IO_JUMPS_FILE_plus (THIS) \
|
|
+ (THIS)->_vtable_offset)))
|
|
# define _IO_vtable_offset(THIS) (THIS)->_vtable_offset
|
|
#else
|
|
# define _IO_JUMPS_FUNC(THIS) (IO_validate_vtable (_IO_JUMPS_FILE_plus (THIS)))
|
|
# define _IO_vtable_offset(THIS) 0
|
|
#endif
|
|
#define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS)
|
|
#define JUMP_FIELD(TYPE, NAME) TYPE NAME
|
|
#define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS)
|
|
#define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
|
|
#define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
|
|
#define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
|
|
#define JUMP_INIT(NAME, VALUE) VALUE
|
|
#define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0)
|
|
|
|
#define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS)
|
|
#define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
|
|
#define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
|
|
#define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
|
|
|
|
/* The 'finish' function does any final cleaning up of an _IO_FILE object.
|
|
It does not delete (free) it, but does everything else to finalize it.
|
|
It matches the streambuf::~streambuf virtual destructor. */
|
|
typedef void (*_IO_finish_t) (FILE *, int); /* finalize */
|
|
#define _IO_FINISH(FP) JUMP1 (__finish, FP, 0)
|
|
#define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0)
|
|
|
|
/* The 'overflow' hook flushes the buffer.
|
|
The second argument is a character, or EOF.
|
|
It matches the streambuf::overflow virtual function. */
|
|
typedef int (*_IO_overflow_t) (FILE *, int);
|
|
#define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH)
|
|
#define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH)
|
|
|
|
/* The 'underflow' hook tries to fills the get buffer.
|
|
It returns the next character (as an unsigned char) or EOF. The next
|
|
character remains in the get buffer, and the get position is not changed.
|
|
It matches the streambuf::underflow virtual function. */
|
|
typedef int (*_IO_underflow_t) (FILE *);
|
|
#define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP)
|
|
#define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP)
|
|
|
|
/* The 'uflow' hook returns the next character in the input stream
|
|
(cast to unsigned char), and increments the read position;
|
|
EOF is returned on failure.
|
|
It matches the streambuf::uflow virtual function, which is not in the
|
|
cfront implementation, but was added to C++ by the ANSI/ISO committee. */
|
|
#define _IO_UFLOW(FP) JUMP0 (__uflow, FP)
|
|
#define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP)
|
|
|
|
/* The 'pbackfail' hook handles backing up.
|
|
It matches the streambuf::pbackfail virtual function. */
|
|
typedef int (*_IO_pbackfail_t) (FILE *, int);
|
|
#define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH)
|
|
#define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH)
|
|
|
|
/* The 'xsputn' hook writes upto N characters from buffer DATA.
|
|
Returns EOF or the number of character actually written.
|
|
It matches the streambuf::xsputn virtual function. */
|
|
typedef size_t (*_IO_xsputn_t) (FILE *FP, const void *DATA,
|
|
size_t N);
|
|
#define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N)
|
|
#define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N)
|
|
|
|
/* The 'xsgetn' hook reads upto N characters into buffer DATA.
|
|
Returns the number of character actually read.
|
|
It matches the streambuf::xsgetn virtual function. */
|
|
typedef size_t (*_IO_xsgetn_t) (FILE *FP, void *DATA, size_t N);
|
|
#define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N)
|
|
#define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N)
|
|
|
|
/* The 'seekoff' hook moves the stream position to a new position
|
|
relative to the start of the file (if DIR==0), the current position
|
|
(MODE==1), or the end of the file (MODE==2).
|
|
It matches the streambuf::seekoff virtual function.
|
|
It is also used for the ANSI fseek function. */
|
|
typedef off64_t (*_IO_seekoff_t) (FILE *FP, off64_t OFF, int DIR,
|
|
int MODE);
|
|
#define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
|
|
#define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE)
|
|
|
|
/* The 'seekpos' hook also moves the stream position,
|
|
but to an absolute position given by a fpos64_t (seekpos).
|
|
It matches the streambuf::seekpos virtual function.
|
|
It is also used for the ANSI fgetpos and fsetpos functions. */
|
|
/* The _IO_seek_cur and _IO_seek_end options are not allowed. */
|
|
typedef off64_t (*_IO_seekpos_t) (FILE *, off64_t, int);
|
|
#define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS)
|
|
#define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS)
|
|
|
|
/* The 'setbuf' hook gives a buffer to the file.
|
|
It matches the streambuf::setbuf virtual function. */
|
|
typedef FILE* (*_IO_setbuf_t) (FILE *, char *, ssize_t);
|
|
#define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH)
|
|
#define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH)
|
|
|
|
/* The 'sync' hook attempts to synchronize the internal data structures
|
|
of the file with the external state.
|
|
It matches the streambuf::sync virtual function. */
|
|
typedef int (*_IO_sync_t) (FILE *);
|
|
#define _IO_SYNC(FP) JUMP0 (__sync, FP)
|
|
#define _IO_WSYNC(FP) WJUMP0 (__sync, FP)
|
|
|
|
/* The 'doallocate' hook is used to tell the file to allocate a buffer.
|
|
It matches the streambuf::doallocate virtual function, which is not
|
|
in the ANSI/ISO C++ standard, but is part traditional implementations. */
|
|
typedef int (*_IO_doallocate_t) (FILE *);
|
|
#define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP)
|
|
#define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP)
|
|
|
|
/* The following four hooks (sysread, syswrite, sysclose, sysseek, and
|
|
sysstat) are low-level hooks specific to this implementation.
|
|
There is no correspondence in the ANSI/ISO C++ standard library.
|
|
The hooks basically correspond to the Unix system functions
|
|
(read, write, close, lseek, and stat) except that a FILE*
|
|
parameter is used instead of an integer file descriptor; the default
|
|
implementation used for normal files just calls those functions.
|
|
The advantage of overriding these functions instead of the higher-level
|
|
ones (underflow, overflow etc) is that you can leave all the buffering
|
|
higher-level functions. */
|
|
|
|
/* The 'sysread' hook is used to read data from the external file into
|
|
an existing buffer. It generalizes the Unix read(2) function.
|
|
It matches the streambuf::sys_read virtual function, which is
|
|
specific to this implementation. */
|
|
typedef ssize_t (*_IO_read_t) (FILE *, void *, ssize_t);
|
|
#define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN)
|
|
#define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN)
|
|
|
|
/* The 'syswrite' hook is used to write data from an existing buffer
|
|
to an external file. It generalizes the Unix write(2) function.
|
|
It matches the streambuf::sys_write virtual function, which is
|
|
specific to this implementation. */
|
|
typedef ssize_t (*_IO_write_t) (FILE *, const void *, ssize_t);
|
|
#define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN)
|
|
#define _IO_WSYSWRITE(FP, DATA, LEN) WJUMP2 (__write, FP, DATA, LEN)
|
|
|
|
/* The 'sysseek' hook is used to re-position an external file.
|
|
It generalizes the Unix lseek(2) function.
|
|
It matches the streambuf::sys_seek virtual function, which is
|
|
specific to this implementation. */
|
|
typedef off64_t (*_IO_seek_t) (FILE *, off64_t, int);
|
|
#define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE)
|
|
#define _IO_WSYSSEEK(FP, OFFSET, MODE) WJUMP2 (__seek, FP, OFFSET, MODE)
|
|
|
|
/* The 'sysclose' hook is used to finalize (close, finish up) an
|
|
external file. It generalizes the Unix close(2) function.
|
|
It matches the streambuf::sys_close virtual function, which is
|
|
specific to this implementation. */
|
|
typedef int (*_IO_close_t) (FILE *); /* finalize */
|
|
#define _IO_SYSCLOSE(FP) JUMP0 (__close, FP)
|
|
#define _IO_WSYSCLOSE(FP) WJUMP0 (__close, FP)
|
|
|
|
/* The 'sysstat' hook is used to get information about an external file
|
|
into a struct stat buffer. It generalizes the Unix fstat(2) call.
|
|
It matches the streambuf::sys_stat virtual function, which is
|
|
specific to this implementation. */
|
|
typedef int (*_IO_stat_t) (FILE *, void *);
|
|
#define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF)
|
|
#define _IO_WSYSSTAT(FP, BUF) WJUMP1 (__stat, FP, BUF)
|
|
|
|
/* The 'showmany' hook can be used to get an image how much input is
|
|
available. In many cases the answer will be 0 which means unknown
|
|
but some cases one can provide real information. */
|
|
typedef int (*_IO_showmanyc_t) (FILE *);
|
|
#define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP)
|
|
#define _IO_WSHOWMANYC(FP) WJUMP0 (__showmanyc, FP)
|
|
|
|
/* The 'imbue' hook is used to get information about the currently
|
|
installed locales. */
|
|
typedef void (*_IO_imbue_t) (FILE *, void *);
|
|
#define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE)
|
|
#define _IO_WIMBUE(FP, LOCALE) WJUMP1 (__imbue, FP, LOCALE)
|
|
|
|
|
|
#define _IO_CHAR_TYPE char /* unsigned char ? */
|
|
#define _IO_INT_TYPE int
|
|
|
|
struct _IO_jump_t
|
|
{
|
|
JUMP_FIELD(size_t, __dummy);
|
|
JUMP_FIELD(size_t, __dummy2);
|
|
JUMP_FIELD(_IO_finish_t, __finish);
|
|
JUMP_FIELD(_IO_overflow_t, __overflow);
|
|
JUMP_FIELD(_IO_underflow_t, __underflow);
|
|
JUMP_FIELD(_IO_underflow_t, __uflow);
|
|
JUMP_FIELD(_IO_pbackfail_t, __pbackfail);
|
|
/* showmany */
|
|
JUMP_FIELD(_IO_xsputn_t, __xsputn);
|
|
JUMP_FIELD(_IO_xsgetn_t, __xsgetn);
|
|
JUMP_FIELD(_IO_seekoff_t, __seekoff);
|
|
JUMP_FIELD(_IO_seekpos_t, __seekpos);
|
|
JUMP_FIELD(_IO_setbuf_t, __setbuf);
|
|
JUMP_FIELD(_IO_sync_t, __sync);
|
|
JUMP_FIELD(_IO_doallocate_t, __doallocate);
|
|
JUMP_FIELD(_IO_read_t, __read);
|
|
JUMP_FIELD(_IO_write_t, __write);
|
|
JUMP_FIELD(_IO_seek_t, __seek);
|
|
JUMP_FIELD(_IO_close_t, __close);
|
|
JUMP_FIELD(_IO_stat_t, __stat);
|
|
JUMP_FIELD(_IO_showmanyc_t, __showmanyc);
|
|
JUMP_FIELD(_IO_imbue_t, __imbue);
|
|
};
|
|
|
|
/* We always allocate an extra word following an _IO_FILE.
|
|
This contains a pointer to the function jump table used.
|
|
This is for compatibility with C++ streambuf; the word can
|
|
be used to smash to a pointer to a virtual function table. */
|
|
|
|
struct _IO_FILE_plus
|
|
{
|
|
FILE file;
|
|
const struct _IO_jump_t *vtable;
|
|
};
|
|
|
|
#ifdef _IO_USE_OLD_IO_FILE
|
|
/* This structure is used by the compatibility code as if it were an
|
|
_IO_FILE_plus, but has enough space to initialize the _mode argument
|
|
of an _IO_FILE_complete. */
|
|
struct _IO_FILE_complete_plus
|
|
{
|
|
struct _IO_FILE_complete file;
|
|
const struct _IO_jump_t *vtable;
|
|
};
|
|
#endif
|
|
|
|
/* Special file type for fopencookie function. */
|
|
struct _IO_cookie_file
|
|
{
|
|
struct _IO_FILE_plus __fp;
|
|
void *__cookie;
|
|
cookie_io_functions_t __io_functions;
|
|
};
|
|
|
|
FILE *_IO_fopencookie (void *cookie, const char *mode,
|
|
cookie_io_functions_t io_functions);
|
|
|
|
|
|
/* Iterator type for walking global linked list of _IO_FILE objects. */
|
|
|
|
typedef FILE *_IO_ITER;
|
|
|
|
/* Generic functions */
|
|
|
|
extern void _IO_switch_to_main_get_area (FILE *) __THROW;
|
|
extern void _IO_switch_to_backup_area (FILE *) __THROW;
|
|
extern int _IO_switch_to_get_mode (FILE *);
|
|
libc_hidden_proto (_IO_switch_to_get_mode)
|
|
extern void _IO_init_internal (FILE *, int) attribute_hidden;
|
|
extern int _IO_sputbackc (FILE *, int) __THROW;
|
|
libc_hidden_proto (_IO_sputbackc)
|
|
extern int _IO_sungetc (FILE *) __THROW;
|
|
extern void _IO_un_link (struct _IO_FILE_plus *) __THROW;
|
|
libc_hidden_proto (_IO_un_link)
|
|
extern void _IO_link_in (struct _IO_FILE_plus *) __THROW;
|
|
libc_hidden_proto (_IO_link_in)
|
|
extern void _IO_doallocbuf (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_doallocbuf)
|
|
extern void _IO_unsave_markers (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_unsave_markers)
|
|
extern void _IO_setb (FILE *, char *, char *, int) __THROW;
|
|
libc_hidden_proto (_IO_setb)
|
|
extern unsigned _IO_adjust_column (unsigned, const char *, int) __THROW;
|
|
libc_hidden_proto (_IO_adjust_column)
|
|
#define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n)
|
|
|
|
ssize_t _IO_least_wmarker (FILE *, wchar_t *) __THROW;
|
|
libc_hidden_proto (_IO_least_wmarker)
|
|
extern void _IO_switch_to_main_wget_area (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_switch_to_main_wget_area)
|
|
extern void _IO_switch_to_wbackup_area (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_switch_to_wbackup_area)
|
|
extern int _IO_switch_to_wget_mode (FILE *);
|
|
libc_hidden_proto (_IO_switch_to_wget_mode)
|
|
extern void _IO_wsetb (FILE *, wchar_t *, wchar_t *, int) __THROW;
|
|
libc_hidden_proto (_IO_wsetb)
|
|
extern wint_t _IO_sputbackwc (FILE *, wint_t) __THROW;
|
|
libc_hidden_proto (_IO_sputbackwc)
|
|
extern wint_t _IO_sungetwc (FILE *) __THROW;
|
|
extern void _IO_wdoallocbuf (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_wdoallocbuf)
|
|
extern void _IO_unsave_wmarkers (FILE *) __THROW;
|
|
extern unsigned _IO_adjust_wcolumn (unsigned, const wchar_t *, int) __THROW;
|
|
extern off64_t get_file_offset (FILE *fp);
|
|
|
|
/* Marker-related function. */
|
|
|
|
extern void _IO_init_marker (struct _IO_marker *, FILE *);
|
|
extern void _IO_init_wmarker (struct _IO_marker *, FILE *);
|
|
extern void _IO_remove_marker (struct _IO_marker *) __THROW;
|
|
extern int _IO_marker_difference (struct _IO_marker *, struct _IO_marker *)
|
|
__THROW;
|
|
extern int _IO_marker_delta (struct _IO_marker *) __THROW;
|
|
extern int _IO_wmarker_delta (struct _IO_marker *) __THROW;
|
|
extern int _IO_seekmark (FILE *, struct _IO_marker *, int) __THROW;
|
|
extern int _IO_seekwmark (FILE *, struct _IO_marker *, int) __THROW;
|
|
|
|
/* Functions for iterating global list and dealing with its lock */
|
|
|
|
extern _IO_ITER _IO_iter_begin (void) __THROW;
|
|
libc_hidden_proto (_IO_iter_begin)
|
|
extern _IO_ITER _IO_iter_end (void) __THROW;
|
|
libc_hidden_proto (_IO_iter_end)
|
|
extern _IO_ITER _IO_iter_next (_IO_ITER) __THROW;
|
|
libc_hidden_proto (_IO_iter_next)
|
|
extern FILE *_IO_iter_file (_IO_ITER) __THROW;
|
|
libc_hidden_proto (_IO_iter_file)
|
|
extern void _IO_list_lock (void) __THROW;
|
|
libc_hidden_proto (_IO_list_lock)
|
|
extern void _IO_list_unlock (void) __THROW;
|
|
libc_hidden_proto (_IO_list_unlock)
|
|
extern void _IO_list_resetlock (void) __THROW;
|
|
libc_hidden_proto (_IO_list_resetlock)
|
|
extern void _IO_enable_locks (void) __THROW;
|
|
libc_hidden_proto (_IO_enable_locks)
|
|
|
|
/* Default jumptable functions. */
|
|
|
|
extern int _IO_default_underflow (FILE *) __THROW;
|
|
extern int _IO_default_uflow (FILE *);
|
|
libc_hidden_proto (_IO_default_uflow)
|
|
extern wint_t _IO_wdefault_uflow (FILE *);
|
|
libc_hidden_proto (_IO_wdefault_uflow)
|
|
extern int _IO_default_doallocate (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_default_doallocate)
|
|
extern int _IO_wdefault_doallocate (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_wdefault_doallocate)
|
|
extern void _IO_default_finish (FILE *, int) __THROW;
|
|
libc_hidden_proto (_IO_default_finish)
|
|
extern void _IO_wdefault_finish (FILE *, int) __THROW;
|
|
libc_hidden_proto (_IO_wdefault_finish)
|
|
extern int _IO_default_pbackfail (FILE *, int) __THROW;
|
|
libc_hidden_proto (_IO_default_pbackfail)
|
|
extern wint_t _IO_wdefault_pbackfail (FILE *, wint_t) __THROW;
|
|
libc_hidden_proto (_IO_wdefault_pbackfail)
|
|
extern FILE* _IO_default_setbuf (FILE *, char *, ssize_t);
|
|
extern size_t _IO_default_xsputn (FILE *, const void *, size_t);
|
|
libc_hidden_proto (_IO_default_xsputn)
|
|
extern size_t _IO_wdefault_xsputn (FILE *, const void *, size_t);
|
|
libc_hidden_proto (_IO_wdefault_xsputn)
|
|
extern size_t _IO_default_xsgetn (FILE *, void *, size_t);
|
|
libc_hidden_proto (_IO_default_xsgetn)
|
|
extern size_t _IO_wdefault_xsgetn (FILE *, void *, size_t);
|
|
libc_hidden_proto (_IO_wdefault_xsgetn)
|
|
extern off64_t _IO_default_seekoff (FILE *, off64_t, int, int)
|
|
__THROW;
|
|
extern off64_t _IO_default_seekpos (FILE *, off64_t, int);
|
|
extern ssize_t _IO_default_write (FILE *, const void *, ssize_t);
|
|
extern ssize_t _IO_default_read (FILE *, void *, ssize_t);
|
|
extern int _IO_default_stat (FILE *, void *) __THROW;
|
|
extern off64_t _IO_default_seek (FILE *, off64_t, int) __THROW;
|
|
extern int _IO_default_sync (FILE *) __THROW;
|
|
#define _IO_default_close ((_IO_close_t) _IO_default_sync)
|
|
extern int _IO_default_showmanyc (FILE *) __THROW;
|
|
extern void _IO_default_imbue (FILE *, void *) __THROW;
|
|
|
|
extern const struct _IO_jump_t _IO_file_jumps;
|
|
libc_hidden_proto (_IO_file_jumps)
|
|
extern const struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_wfile_jumps;
|
|
libc_hidden_proto (_IO_wfile_jumps)
|
|
extern const struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_old_file_jumps attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_streambuf_jumps;
|
|
extern const struct _IO_jump_t _IO_old_proc_jumps attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_str_jumps attribute_hidden;
|
|
extern const struct _IO_jump_t _IO_wstr_jumps attribute_hidden;
|
|
extern const struct _IO_codecvt __libio_codecvt attribute_hidden;
|
|
extern int _IO_do_write (FILE *, const char *, size_t);
|
|
libc_hidden_proto (_IO_do_write)
|
|
extern int _IO_new_do_write (FILE *, const char *, size_t);
|
|
extern int _IO_old_do_write (FILE *, const char *, size_t);
|
|
extern int _IO_wdo_write (FILE *, const wchar_t *, size_t);
|
|
libc_hidden_proto (_IO_wdo_write)
|
|
extern int _IO_flush_all_lockp (int);
|
|
extern int _IO_flush_all (void);
|
|
libc_hidden_proto (_IO_flush_all)
|
|
extern int _IO_cleanup (void);
|
|
extern void _IO_flush_all_linebuffered (void);
|
|
libc_hidden_proto (_IO_flush_all_linebuffered)
|
|
extern int _IO_new_fgetpos (FILE *, __fpos_t *);
|
|
extern int _IO_old_fgetpos (FILE *, __fpos_t *);
|
|
extern int _IO_new_fsetpos (FILE *, const __fpos_t *);
|
|
extern int _IO_old_fsetpos (FILE *, const __fpos_t *);
|
|
extern int _IO_new_fgetpos64 (FILE *, __fpos64_t *);
|
|
extern int _IO_old_fgetpos64 (FILE *, __fpos64_t *);
|
|
extern int _IO_new_fsetpos64 (FILE *, const __fpos64_t *);
|
|
extern int _IO_old_fsetpos64 (FILE *, const __fpos64_t *);
|
|
extern void _IO_old_init (FILE *fp, int flags) __THROW;
|
|
|
|
|
|
#define _IO_do_flush(_f) \
|
|
((_f)->_mode <= 0 \
|
|
? _IO_do_write(_f, (_f)->_IO_write_base, \
|
|
(_f)->_IO_write_ptr-(_f)->_IO_write_base) \
|
|
: _IO_wdo_write(_f, (_f)->_wide_data->_IO_write_base, \
|
|
((_f)->_wide_data->_IO_write_ptr \
|
|
- (_f)->_wide_data->_IO_write_base)))
|
|
#define _IO_old_do_flush(_f) \
|
|
_IO_old_do_write(_f, (_f)->_IO_write_base, \
|
|
(_f)->_IO_write_ptr-(_f)->_IO_write_base)
|
|
#define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
|
|
#define _IO_mask_flags(fp, f, mask) \
|
|
((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
|
|
#define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\
|
|
(fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
|
|
#define _IO_wsetg(fp, eb, g, eg) ((fp)->_wide_data->_IO_read_base = (eb),\
|
|
(fp)->_wide_data->_IO_read_ptr = (g), \
|
|
(fp)->_wide_data->_IO_read_end = (eg))
|
|
#define _IO_setp(__fp, __p, __ep) \
|
|
((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \
|
|
= __p, (__fp)->_IO_write_end = (__ep))
|
|
#define _IO_wsetp(__fp, __p, __ep) \
|
|
((__fp)->_wide_data->_IO_write_base \
|
|
= (__fp)->_wide_data->_IO_write_ptr = __p, \
|
|
(__fp)->_wide_data->_IO_write_end = (__ep))
|
|
#define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
|
|
#define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL)
|
|
#define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
|
|
#define _IO_have_markers(fp) ((fp)->_markers != NULL)
|
|
#define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
|
|
#define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \
|
|
- (fp)->_wide_data->_IO_buf_base)
|
|
|
|
/* Jumptable functions for files. */
|
|
|
|
extern int _IO_file_doallocate (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_file_doallocate)
|
|
extern FILE* _IO_file_setbuf (FILE *, char *, ssize_t);
|
|
libc_hidden_proto (_IO_file_setbuf)
|
|
extern off64_t _IO_file_seekoff (FILE *, off64_t, int, int);
|
|
libc_hidden_proto (_IO_file_seekoff)
|
|
extern off64_t _IO_file_seekoff_mmap (FILE *, off64_t, int, int)
|
|
__THROW;
|
|
extern size_t _IO_file_xsputn (FILE *, const void *, size_t);
|
|
libc_hidden_proto (_IO_file_xsputn)
|
|
extern size_t _IO_file_xsgetn (FILE *, void *, size_t);
|
|
libc_hidden_proto (_IO_file_xsgetn)
|
|
extern int _IO_file_stat (FILE *, void *) __THROW;
|
|
libc_hidden_proto (_IO_file_stat)
|
|
extern int _IO_file_close (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_file_close)
|
|
extern int _IO_file_close_mmap (FILE *) __THROW;
|
|
extern int _IO_file_underflow (FILE *);
|
|
libc_hidden_proto (_IO_file_underflow)
|
|
extern int _IO_file_underflow_mmap (FILE *);
|
|
extern int _IO_file_underflow_maybe_mmap (FILE *);
|
|
extern int _IO_file_overflow (FILE *, int);
|
|
libc_hidden_proto (_IO_file_overflow)
|
|
#define _IO_file_is_open(__fp) ((__fp)->_fileno != -1)
|
|
extern FILE* _IO_file_attach (FILE *, int);
|
|
libc_hidden_proto (_IO_file_attach)
|
|
extern FILE* _IO_file_open (FILE *, const char *, int, int, int, int);
|
|
libc_hidden_proto (_IO_file_open)
|
|
extern FILE* _IO_file_fopen (FILE *, const char *, const char *, int);
|
|
libc_hidden_proto (_IO_file_fopen)
|
|
extern ssize_t _IO_file_write (FILE *, const void *, ssize_t);
|
|
extern ssize_t _IO_file_read (FILE *, void *, ssize_t);
|
|
libc_hidden_proto (_IO_file_read)
|
|
extern int _IO_file_sync (FILE *);
|
|
libc_hidden_proto (_IO_file_sync)
|
|
extern int _IO_file_close_it (FILE *);
|
|
libc_hidden_proto (_IO_file_close_it)
|
|
extern off64_t _IO_file_seek (FILE *, off64_t, int) __THROW;
|
|
libc_hidden_proto (_IO_file_seek)
|
|
extern void _IO_file_finish (FILE *, int);
|
|
libc_hidden_proto (_IO_file_finish)
|
|
|
|
extern FILE* _IO_new_file_attach (FILE *, int);
|
|
extern int _IO_new_file_close_it (FILE *);
|
|
extern void _IO_new_file_finish (FILE *, int);
|
|
extern FILE* _IO_new_file_fopen (FILE *, const char *, const char *,
|
|
int);
|
|
extern void _IO_no_init (FILE *, int, int, struct _IO_wide_data *,
|
|
const struct _IO_jump_t *) __THROW;
|
|
extern void _IO_new_file_init_internal (struct _IO_FILE_plus *)
|
|
__THROW attribute_hidden;
|
|
extern FILE* _IO_new_file_setbuf (FILE *, char *, ssize_t);
|
|
extern FILE* _IO_file_setbuf_mmap (FILE *, char *, ssize_t);
|
|
extern int _IO_new_file_sync (FILE *);
|
|
extern int _IO_new_file_underflow (FILE *);
|
|
extern int _IO_new_file_overflow (FILE *, int);
|
|
extern off64_t _IO_new_file_seekoff (FILE *, off64_t, int, int);
|
|
extern ssize_t _IO_new_file_write (FILE *, const void *, ssize_t);
|
|
extern size_t _IO_new_file_xsputn (FILE *, const void *, size_t);
|
|
|
|
extern FILE* _IO_old_file_setbuf (FILE *, char *, ssize_t);
|
|
extern off64_t _IO_old_file_seekoff (FILE *, off64_t, int, int);
|
|
extern size_t _IO_old_file_xsputn (FILE *, const void *, size_t);
|
|
extern int _IO_old_file_underflow (FILE *);
|
|
extern int _IO_old_file_overflow (FILE *, int);
|
|
extern void _IO_old_file_init_internal (struct _IO_FILE_plus *)
|
|
__THROW attribute_hidden;
|
|
extern FILE* _IO_old_file_attach (FILE *, int);
|
|
extern FILE* _IO_old_file_fopen (FILE *, const char *, const char *);
|
|
extern ssize_t _IO_old_file_write (FILE *, const void *, ssize_t);
|
|
extern int _IO_old_file_sync (FILE *);
|
|
extern int _IO_old_file_close_it (FILE *);
|
|
extern void _IO_old_file_finish (FILE *, int);
|
|
|
|
extern int _IO_wfile_doallocate (FILE *) __THROW;
|
|
extern size_t _IO_wfile_xsputn (FILE *, const void *, size_t);
|
|
libc_hidden_proto (_IO_wfile_xsputn)
|
|
extern FILE* _IO_wfile_setbuf (FILE *, wchar_t *, ssize_t);
|
|
extern wint_t _IO_wfile_sync (FILE *);
|
|
libc_hidden_proto (_IO_wfile_sync)
|
|
extern wint_t _IO_wfile_underflow (FILE *);
|
|
libc_hidden_proto (_IO_wfile_underflow)
|
|
extern wint_t _IO_wfile_overflow (FILE *, wint_t);
|
|
libc_hidden_proto (_IO_wfile_overflow)
|
|
extern off64_t _IO_wfile_seekoff (FILE *, off64_t, int, int);
|
|
libc_hidden_proto (_IO_wfile_seekoff)
|
|
|
|
/* Jumptable functions for proc_files. */
|
|
extern FILE* _IO_proc_open (FILE *, const char *, const char *)
|
|
__THROW;
|
|
extern FILE* _IO_new_proc_open (FILE *, const char *, const char *)
|
|
__THROW;
|
|
extern FILE* _IO_old_proc_open (FILE *, const char *, const char *);
|
|
extern int _IO_proc_close (FILE *) __THROW;
|
|
extern int _IO_new_proc_close (FILE *) __THROW;
|
|
extern int _IO_old_proc_close (FILE *);
|
|
|
|
/* Jumptable functions for strfiles. */
|
|
extern int _IO_str_underflow (FILE *) __THROW;
|
|
libc_hidden_proto (_IO_str_underflow)
|
|
extern int _IO_str_overflow (FILE *, int) __THROW;
|
|
libc_hidden_proto (_IO_str_overflow)
|
|
extern int _IO_str_pbackfail (FILE *, int) __THROW;
|
|
libc_hidden_proto (_IO_str_pbackfail)
|
|
extern off64_t _IO_str_seekoff (FILE *, off64_t, int, int) __THROW;
|
|
libc_hidden_proto (_IO_str_seekoff)
|
|
extern void _IO_str_finish (FILE *, int) __THROW;
|
|
|
|
/* Other strfile functions */
|
|
struct _IO_strfile_;
|
|
extern ssize_t _IO_str_count (FILE *) __THROW;
|
|
|
|
/* And the wide character versions. */
|
|
extern void _IO_wstr_init_static (FILE *, wchar_t *, size_t, wchar_t *)
|
|
__THROW;
|
|
extern ssize_t _IO_wstr_count (FILE *) __THROW;
|
|
extern wint_t _IO_wstr_overflow (FILE *, wint_t) __THROW;
|
|
extern wint_t _IO_wstr_underflow (FILE *) __THROW;
|
|
extern off64_t _IO_wstr_seekoff (FILE *, off64_t, int, int)
|
|
__THROW;
|
|
extern wint_t _IO_wstr_pbackfail (FILE *, wint_t) __THROW;
|
|
extern void _IO_wstr_finish (FILE *, int) __THROW;
|
|
|
|
extern int _IO_vasprintf (char **result_ptr, const char *format,
|
|
va_list args) __THROW;
|
|
extern int _IO_vdprintf (int d, const char *format, va_list arg);
|
|
extern int _IO_vsnprintf (char *string, size_t maxlen,
|
|
const char *format, va_list args) __THROW;
|
|
|
|
|
|
extern size_t _IO_getline (FILE *,char *, size_t, int, int);
|
|
libc_hidden_proto (_IO_getline)
|
|
extern size_t _IO_getline_info (FILE *,char *, size_t,
|
|
int, int, int *);
|
|
libc_hidden_proto (_IO_getline_info)
|
|
extern ssize_t _IO_getdelim (char **, size_t *, int, FILE *);
|
|
extern size_t _IO_getwline (FILE *,wchar_t *, size_t, wint_t, int);
|
|
extern size_t _IO_getwline_info (FILE *,wchar_t *, size_t,
|
|
wint_t, int, wint_t *);
|
|
|
|
extern struct _IO_FILE_plus *_IO_list_all;
|
|
libc_hidden_proto (_IO_list_all)
|
|
extern void (*_IO_cleanup_registration_needed) (void);
|
|
|
|
extern void _IO_str_init_static_internal (struct _IO_strfile_ *, char *,
|
|
size_t, char *) __THROW;
|
|
extern off64_t _IO_seekoff_unlocked (FILE *, off64_t, int, int)
|
|
attribute_hidden;
|
|
extern off64_t _IO_seekpos_unlocked (FILE *, off64_t, int)
|
|
attribute_hidden;
|
|
|
|
#if _G_HAVE_MMAP
|
|
|
|
# include <unistd.h>
|
|
# include <fcntl.h>
|
|
# include <sys/mman.h>
|
|
# include <sys/param.h>
|
|
|
|
# if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
|
|
# define MAP_ANONYMOUS MAP_ANON
|
|
# endif
|
|
|
|
# if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
|
|
# undef _G_HAVE_MMAP
|
|
# define _G_HAVE_MMAP 0
|
|
# endif
|
|
|
|
#endif /* _G_HAVE_MMAP */
|
|
|
|
extern int _IO_vscanf (const char *, va_list) __THROW;
|
|
|
|
#ifdef _IO_MTSAFE_IO
|
|
/* check following! */
|
|
# ifdef _IO_USE_OLD_IO_FILE
|
|
# define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
|
|
{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \
|
|
0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock }
|
|
# else
|
|
# define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
|
|
{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \
|
|
0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
|
|
NULL, WDP, 0 }
|
|
# endif
|
|
#else
|
|
# ifdef _IO_USE_OLD_IO_FILE
|
|
# define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
|
|
{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \
|
|
0, _IO_pos_BAD }
|
|
# else
|
|
# define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
|
|
{ _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \
|
|
0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
|
|
NULL, WDP, 0 }
|
|
# endif
|
|
#endif
|
|
|
|
extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
|
|
|
|
#ifdef IO_DEBUG
|
|
# define CHECK_FILE(FILE, RET) do { \
|
|
if ((FILE) == NULL || \
|
|
((FILE)->_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
|
|
{ \
|
|
__set_errno (EINVAL); \
|
|
return RET; \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
# define CHECK_FILE(FILE, RET) do { } while (0)
|
|
#endif
|
|
|
|
static inline void
|
|
__attribute__ ((__always_inline__))
|
|
_IO_acquire_lock_fct (FILE **p)
|
|
{
|
|
FILE *fp = *p;
|
|
if ((fp->_flags & _IO_USER_LOCK) == 0)
|
|
_IO_funlockfile (fp);
|
|
}
|
|
|
|
static inline void
|
|
__attribute__ ((__always_inline__))
|
|
_IO_acquire_lock_clear_flags2_fct (FILE **p)
|
|
{
|
|
FILE *fp = *p;
|
|
fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY | _IO_FLAGS2_SCANF_STD);
|
|
if ((fp->_flags & _IO_USER_LOCK) == 0)
|
|
_IO_funlockfile (fp);
|
|
}
|
|
|
|
#if !defined _IO_MTSAFE_IO && IS_IN (libc)
|
|
# define _IO_acquire_lock(_fp) \
|
|
do { \
|
|
FILE *_IO_acquire_lock_file = NULL
|
|
# define _IO_acquire_lock_clear_flags2(_fp) \
|
|
do { \
|
|
FILE *_IO_acquire_lock_file = (_fp)
|
|
# define _IO_release_lock(_fp) \
|
|
if (_IO_acquire_lock_file != NULL) \
|
|
_IO_acquire_lock_file->_flags2 &= ~(_IO_FLAGS2_FORTIFY \
|
|
| _IO_FLAGS2_SCANF_STD); \
|
|
} while (0)
|
|
#endif
|
|
|
|
/* Collect all vtables in a special section for vtable verification.
|
|
These symbols cover the extent of this section. */
|
|
symbol_set_declare (__libc_IO_vtables)
|
|
|
|
/* libio vtables need to carry this attribute so that they pass
|
|
validation. */
|
|
#define libio_vtable __attribute__ ((section ("__libc_IO_vtables")))
|
|
|
|
#ifdef SHARED
|
|
/* If equal to &_IO_vtable_check (with pointer guard protection),
|
|
unknown vtable pointers are valid. This function pointer is solely
|
|
used as a flag. */
|
|
extern void (*IO_accept_foreign_vtables) (void) attribute_hidden;
|
|
|
|
/* Assigns the passed function pointer (either NULL or
|
|
&_IO_vtable_check) to IO_accept_foreign_vtables. */
|
|
static inline void
|
|
IO_set_accept_foreign_vtables (void (*flag) (void))
|
|
{
|
|
#ifdef PTR_MANGLE
|
|
PTR_MANGLE (flag);
|
|
#endif
|
|
atomic_store_relaxed (&IO_accept_foreign_vtables, flag);
|
|
}
|
|
|
|
#else /* !SHARED */
|
|
|
|
/* The statically-linked version does nothing. */
|
|
static inline void
|
|
IO_set_accept_foreign_vtables (void (*flag) (void))
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Check if unknown vtable pointers are permitted; otherwise,
|
|
terminate the process. */
|
|
void _IO_vtable_check (void) attribute_hidden;
|
|
|
|
/* Perform vtable pointer validation. If validation fails, terminate
|
|
the process. */
|
|
static inline const struct _IO_jump_t *
|
|
IO_validate_vtable (const struct _IO_jump_t *vtable)
|
|
{
|
|
/* Fast path: The vtable pointer is within the __libc_IO_vtables
|
|
section. */
|
|
uintptr_t section_length = __stop___libc_IO_vtables - __start___libc_IO_vtables;
|
|
const char *ptr = (const char *) vtable;
|
|
uintptr_t offset = ptr - __start___libc_IO_vtables;
|
|
if (__glibc_unlikely (offset >= section_length))
|
|
/* The vtable pointer is not in the expected section. Use the
|
|
slow path, which will terminate the process if necessary. */
|
|
_IO_vtable_check ();
|
|
return vtable;
|
|
}
|
|
|
|
#endif /* libioP.h. */
|