mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
454a20c875
These functions are about to be added to POSIX, under Austin Group issue 986. The fortified strlcat implementation does not raise SIGABRT if the destination buffer does not contain a null terminator, it just inherits the non-failing regular strlcat behavior. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
/* Fortified version of strlcat.
|
|
Copyright (C) 2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <string.h>
|
|
|
|
/* Check that the user-supplied size does not exceed the
|
|
compiler-determined size, and then forward to strlcat. */
|
|
size_t
|
|
__strlcat_chk (char *__restrict s1, const char *__restrict s2,
|
|
size_t n, size_t s1len)
|
|
{
|
|
if (__glibc_unlikely (s1len < n))
|
|
__chk_fail ();
|
|
|
|
return __strlcat (s1, s2, n);
|
|
}
|