| | 1 | /* |
| | 2 | * Copyright (c) 2007-2013 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | |
| | 24 | #include <stdlib.h> |
| | 25 | #include <string.h> |
| | 26 | #include "secure.h" |
| | 27 | |
| | 28 | char * |
| | 29 | __strncpy_chk (char *restrict dest, char *restrict src, |
| | 30 | size_t len, size_t dstlen) |
| | 31 | { |
| | 32 | size_t n; |
| | 33 | |
| | 34 | if (__builtin_expect (dstlen < len, 0)) |
| | 35 | __chk_fail_overflow (); |
| | 36 | |
| | 37 | // stpncpy normally returns a pointer to the \0 |
| | 38 | n = stpncpy (dest, src, len) - dest + 1; |
| | 39 | |
| | 40 | // Check if it's pointing to the location after the buffer after not writing \0 |
| | 41 | if (n == len + 1) |
| | 42 | n--; |
| | 43 | |
| | 44 | if (__builtin_expect (__chk_assert_no_overlap != 0, 1)) |
| | 45 | __chk_overlap(dest, n, src, n); |
| | 46 | |
| | 47 | return dest; |
| | 48 | } |
projects / apple / libc.git / blame_incremental