| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1994-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <stdarg.h> |
| 19 | #include <stdio.h> |
| 20 | #include "../libio/libioP.h" |
| 21 | #include "../libio/strfile.h" |
| 22 | |
| 23 | |
| 24 | static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW; |
| 25 | |
| 26 | static int |
| 27 | _IO_str_chk_overflow (fp, c) |
| 28 | _IO_FILE *fp; |
| 29 | int c; |
| 30 | { |
| 31 | /* When we come to here this means the user supplied buffer is |
| 32 | filled. */ |
| 33 | __chk_fail (); |
| 34 | } |
| 35 | |
| 36 | |
| 37 | static const struct _IO_jump_t _IO_str_chk_jumps = |
| 38 | { |
| 39 | JUMP_INIT_DUMMY, |
| 40 | JUMP_INIT(finish, _IO_str_finish), |
| 41 | JUMP_INIT(overflow, _IO_str_chk_overflow), |
| 42 | JUMP_INIT(underflow, _IO_str_underflow), |
| 43 | JUMP_INIT(uflow, _IO_default_uflow), |
| 44 | JUMP_INIT(pbackfail, _IO_str_pbackfail), |
| 45 | JUMP_INIT(xsputn, _IO_default_xsputn), |
| 46 | JUMP_INIT(xsgetn, _IO_default_xsgetn), |
| 47 | JUMP_INIT(seekoff, _IO_str_seekoff), |
| 48 | JUMP_INIT(seekpos, _IO_default_seekpos), |
| 49 | JUMP_INIT(setbuf, _IO_default_setbuf), |
| 50 | JUMP_INIT(sync, _IO_default_sync), |
| 51 | JUMP_INIT(doallocate, _IO_default_doallocate), |
| 52 | JUMP_INIT(read, _IO_default_read), |
| 53 | JUMP_INIT(write, _IO_default_write), |
| 54 | JUMP_INIT(seek, _IO_default_seek), |
| 55 | JUMP_INIT(close, _IO_default_close), |
| 56 | JUMP_INIT(stat, _IO_default_stat), |
| 57 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
| 58 | JUMP_INIT(imbue, _IO_default_imbue) |
| 59 | }; |
| 60 | |
| 61 | |
| 62 | int |
| 63 | ___vsprintf_chk (char *s, int flags, size_t slen, const char *format, |
| 64 | va_list args) |
| 65 | { |
| 66 | _IO_strfile f; |
| 67 | int ret; |
| 68 | #ifdef _IO_MTSAFE_IO |
| 69 | f._sbf._f._lock = NULL; |
| 70 | #endif |
| 71 | |
| 72 | if (slen == 0) |
| 73 | __chk_fail (); |
| 74 | |
| 75 | _IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL); |
| 76 | _IO_JUMPS (&f._sbf) = &_IO_str_chk_jumps; |
| 77 | s[0] = '\0'; |
| 78 | _IO_str_init_static_internal (&f, s, slen - 1, s); |
| 79 | |
| 80 | /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n |
| 81 | can only come from read-only format strings. */ |
| 82 | if (flags > 0) |
| 83 | f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY; |
| 84 | |
| 85 | ret = _IO_vfprintf (&f._sbf._f, format, args); |
| 86 | |
| 87 | *f._sbf._f._IO_write_ptr = '\0'; |
| 88 | return ret; |
| 89 | } |
| 90 | ldbl_hidden_def (___vsprintf_chk, __vsprintf_chk) |
| 91 | ldbl_strong_alias (___vsprintf_chk, __vsprintf_chk) |