Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/debug/vsprintf_chk.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
89 lines (73 sloc)
2.67 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Copyright (C) 1994-2016 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/>. */ | |
#include <stdarg.h> | |
#include <stdio.h> | |
#include "../libio/libioP.h" | |
#include "../libio/strfile.h" | |
static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW; | |
static int | |
_IO_str_chk_overflow (_IO_FILE *fp, int c) | |
{ | |
/* When we come to here this means the user supplied buffer is | |
filled. */ | |
__chk_fail (); | |
} | |
static const struct _IO_jump_t _IO_str_chk_jumps = | |
{ | |
JUMP_INIT_DUMMY, | |
JUMP_INIT(finish, _IO_str_finish), | |
JUMP_INIT(overflow, _IO_str_chk_overflow), | |
JUMP_INIT(underflow, _IO_str_underflow), | |
JUMP_INIT(uflow, _IO_default_uflow), | |
JUMP_INIT(pbackfail, _IO_str_pbackfail), | |
JUMP_INIT(xsputn, _IO_default_xsputn), | |
JUMP_INIT(xsgetn, _IO_default_xsgetn), | |
JUMP_INIT(seekoff, _IO_str_seekoff), | |
JUMP_INIT(seekpos, _IO_default_seekpos), | |
JUMP_INIT(setbuf, _IO_default_setbuf), | |
JUMP_INIT(sync, _IO_default_sync), | |
JUMP_INIT(doallocate, _IO_default_doallocate), | |
JUMP_INIT(read, _IO_default_read), | |
JUMP_INIT(write, _IO_default_write), | |
JUMP_INIT(seek, _IO_default_seek), | |
JUMP_INIT(close, _IO_default_close), | |
JUMP_INIT(stat, _IO_default_stat), | |
JUMP_INIT(showmanyc, _IO_default_showmanyc), | |
JUMP_INIT(imbue, _IO_default_imbue) | |
}; | |
int | |
___vsprintf_chk (char *s, int flags, size_t slen, const char *format, | |
va_list args) | |
{ | |
_IO_strfile f; | |
int ret; | |
#ifdef _IO_MTSAFE_IO | |
f._sbf._f._lock = NULL; | |
#endif | |
if (slen == 0) | |
__chk_fail (); | |
_IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL); | |
_IO_JUMPS (&f._sbf) = &_IO_str_chk_jumps; | |
s[0] = '\0'; | |
_IO_str_init_static_internal (&f, s, slen - 1, s); | |
/* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n | |
can only come from read-only format strings. */ | |
if (flags > 0) | |
f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY; | |
ret = _IO_vfprintf (&f._sbf._f, format, args); | |
*f._sbf._f._IO_write_ptr = '\0'; | |
return ret; | |
} | |
ldbl_hidden_def (___vsprintf_chk, __vsprintf_chk) | |
ldbl_strong_alias (___vsprintf_chk, __vsprintf_chk) |