| /* Copyright (C) 1994-2018 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/>. */ |
| |
| #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 libio_vtable = |
| { |
| 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) |
