123 lines
2.9 KiB
C
123 lines
2.9 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_STDIO_H
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#define _FORTIFY_STDIO_H
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#include_next <stdio.h>
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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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#undef fgets
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#undef fread
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#undef fwrite
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#undef vsprintf
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#undef vsnprintf
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#undef snprintf
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#undef sprintf
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fortify_fn(fgets) char *fgets(char *s, int n, FILE *fp)
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{
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size_t bos = __builtin_object_size(s, 0);
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if ((size_t)n > bos)
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__builtin_trap();
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return __orig_fgets(s, n, fp);
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}
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fortify_fn(fread) size_t fread(void *dst, size_t n, size_t nmemb, FILE *fp)
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{
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size_t bos = __builtin_object_size(dst, 0);
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if (n != 0 && (n * nmemb) / n != nmemb)
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__builtin_trap();
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if (n * nmemb > bos)
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__builtin_trap();
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return __orig_fread(dst, n, nmemb, fp);
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}
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fortify_fn(fwrite) size_t fwrite(const void *dst, size_t n, size_t nmemb, FILE *fp)
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{
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size_t bos = __builtin_object_size(dst, 0);
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if (n != 0 && (n * nmemb) / n != nmemb)
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__builtin_trap();
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if (n * nmemb > bos)
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__builtin_trap();
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return __orig_fwrite(dst, n, nmemb, fp);
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}
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fortify_fn(vsnprintf) int vsnprintf(char *s, size_t n, const char *fmt,
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__builtin_va_list ap)
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{
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size_t bos = __builtin_object_size(s, 0);
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if (n > bos)
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__builtin_trap();
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return __orig_vsnprintf(s, n, fmt, ap);
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}
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fortify_fn(vsprintf) int vsprintf(char *s, const char *fmt, __builtin_va_list ap)
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{
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size_t bos = __builtin_object_size(s, 0);
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int r;
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if (bos != (size_t)-1) {
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r = __orig_vsnprintf(s, bos, fmt, ap);
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if (r != -1 && (size_t)r >= bos)
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__builtin_trap();
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} else {
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r = __orig_vsprintf(s, fmt, ap);
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}
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return r;
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}
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fortify_fn(snprintf) int snprintf(char *s, size_t n, const char *fmt, ...)
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{
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size_t bos = __builtin_object_size(s, 0);
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if (n > bos)
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__builtin_trap();
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return __orig_snprintf(s, n, fmt, __builtin_va_arg_pack());
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}
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fortify_fn(sprintf) int sprintf(char *s, const char *fmt, ...)
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{
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size_t bos = __builtin_object_size(s, 0);
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int r;
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if (bos != (size_t)-1) {
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r = __orig_snprintf(s, bos, fmt, __builtin_va_arg_pack());
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if (r != -1 && (size_t)r >= bos)
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__builtin_trap();
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} else {
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r = __orig_sprintf(s, fmt, __builtin_va_arg_pack());
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}
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return r;
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}
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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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