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d614a753 | 1 | /* Copyright (C) 1991-2020 Free Software Foundation, Inc. |
b5cc329c UD |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
b5cc329c UD |
17 | |
18 | #include <stdarg.h> | |
4e2f43f8 ZW |
19 | #include <libio/libioP.h> |
20 | ||
b5cc329c UD |
21 | |
22 | /* Write formatted output into S, according to the format string FORMAT. */ | |
b5cc329c | 23 | int |
4e2f43f8 | 24 | ___sprintf_chk (char *s, int flag, size_t slen, const char *format, ...) |
b5cc329c | 25 | { |
4e2f43f8 ZW |
26 | /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n |
27 | can only come from read-only format strings. */ | |
28 | unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0; | |
29 | va_list ap; | |
30 | int ret; | |
31 | ||
2d9837c1 GG |
32 | /* Regardless of the value of flag, let __vsprintf_internal know that |
33 | this is a call from *printf_chk. */ | |
34 | mode |= PRINTF_CHK; | |
35 | ||
4e2f43f8 ZW |
36 | if (slen == 0) |
37 | __chk_fail (); | |
b5cc329c | 38 | |
4e2f43f8 ZW |
39 | va_start (ap, format); |
40 | ret = __vsprintf_internal (s, slen, format, ap, mode); | |
41 | va_end (ap); | |
b5cc329c | 42 | |
4e2f43f8 | 43 | return ret; |
b5cc329c | 44 | } |
c6251f03 | 45 | ldbl_strong_alias (___sprintf_chk, __sprintf_chk) |