68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
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* Copyright (C) 2015 Dimitris Papastamos <sin@2f30.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _FORTIFY_STDLIB_H
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#define _FORTIFY_STDLIB_H
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__extension__
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#include_next <stdlib.h>
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#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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__extension__
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#include_next <limits.h>
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#endif
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#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
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#include "fortify-headers.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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#undef realpath
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_FORTIFY_FN(realpath) char *realpath(const char *__p, char *__r)
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{
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size_t __b = __builtin_object_size(__r, 0);
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if (__r) {
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#ifndef PATH_MAX
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#error PATH_MAX unset. A fortified realpath will not work.
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#else
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char __buf[PATH_MAX], *__ret;
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size_t __l;
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__ret = __orig_realpath(__p, __buf);
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if (!__ret)
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return NULL;
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__l = __builtin_strlen(__ret) + 1;
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if (__l > __b)
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__builtin_trap();
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__builtin_memcpy(__r, __ret, __l);
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return __r;
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#endif
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}
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return __orig_realpath(__p, __r);
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif
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