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454a20c8 | 1 | /* Fortified version of strlcat. |
dff8da6b | 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
454a20c8 FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <string.h> | |
20 | ||
21 | /* Check that the user-supplied size does not exceed the | |
22 | compiler-determined size, and then forward to strlcat. */ | |
23 | size_t | |
24 | __strlcat_chk (char *__restrict s1, const char *__restrict s2, | |
25 | size_t n, size_t s1len) | |
26 | { | |
27 | if (__glibc_unlikely (s1len < n)) | |
28 | __chk_fail (); | |
29 | ||
30 | return __strlcat (s1, s2, n); | |
31 | } |