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lib/libc/secure/__strrchr_chk.c
- This file was added.
| /*- | |||||
| * Copyright (c) 1988 Regents of the University of California. | |||||
| * All rights reserved. | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted provided that the following conditions | |||||
| * are met: | |||||
| * 1. Redistributions of source code must retain the above copyright | |||||
| * notice, this list of conditions and the following disclaimer. | |||||
| * 2. Redistributions in binary form must reproduce the above copyright | |||||
| * notice, this list of conditions and the following disclaimer in the | |||||
| * documentation and/or other materials provided with the distribution. | |||||
| * 3. Neither the name of the University nor the names of its contributors | |||||
| * may be used to endorse or promote products derived from this software | |||||
| * without specific prior written permission. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||||
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||||
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
| * SUCH DAMAGE. | |||||
| * | |||||
| * bionic rev: d807b9a12d3e49132b095df3d883618452033b51 | |||||
| * | |||||
| * $FreeBSD$ | |||||
| */ | |||||
| #undef _FORTIFY_SOURCE | |||||
| #include <sys/cdefs.h> | |||||
| #include <secure/security.h> | |||||
| #include <string.h> | |||||
| #include "secure/_string.h" | |||||
| char * | |||||
| __strrchr_chk(const char *p, int ch, size_t bos) | |||||
| { | |||||
| char *save; | |||||
| if (__predict_false(bos == __FORTIFY_UNKNOWN_SIZE)) | |||||
| return (strrchr(p, ch)); | |||||
| for (save = NULL;; ++p, bos--) { | |||||
| if (bos == 0) | |||||
| __fortify_chk_fail( | |||||
| "strrchr: prevented read past end of buffer"); | |||||
| if (*p == (char)ch) | |||||
| save = (char *)p; | |||||
| if (!*p) | |||||
| return (save); | |||||
| } | |||||
| /* NOTREACHED */ | |||||
| } | |||||
| __weak_reference(__strrchr_chk, __rindex_chk); | |||||