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#ifndef FORTIFY_STDIO_H_
#define FORTIFY_STDIO_H_
#include_next <stdio.h>
#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
static inline __attribute__ ((always_inline))
char *
__fortify_fgets(char *s, int n, FILE *fp)
{
size_t bos = __builtin_object_size(s, 0);
if ((size_t)n > bos)
__builtin_trap();
return fgets(s, n, fp);
}
static inline __attribute__ ((always_inline))
size_t
__fortify_fread(void *dst, size_t n, size_t nmemb, FILE *fp)
{
size_t bos = __builtin_object_size(dst, 0);
if (n != 0 && (n * nmemb) / n != nmemb)
__builtin_trap();
if (n * nmemb > bos)
__builtin_trap();
return fread(dst, n, nmemb, fp);
}
static inline __attribute__ ((always_inline))
size_t
__fortify_fwrite(const void *dst, size_t n, size_t nmemb, FILE *fp)
{
size_t bos = __builtin_object_size(dst, 0);
if (n != 0 && (n * nmemb) / n != nmemb)
__builtin_trap();
if (n * nmemb > bos)
__builtin_trap();
return fwrite(dst, n, nmemb, fp);
}
static inline __attribute__ ((always_inline))
int
__fortify_vsprintf(char *s, const char *fmt, __builtin_va_list ap)
{
size_t bos = __builtin_object_size(s, 0);
int r;
if (bos != (size_t)-1) {
r = vsnprintf(s, bos, fmt, ap);
if (r != -1 && (size_t)r >= bos)
__builtin_trap();
} else {
r = vsprintf(s, fmt, ap);
}
return r;
}
static inline __attribute__ ((always_inline))
int
__fortify_vsnprintf(char *s, size_t n, const char *fmt, __builtin_va_list ap)
{
size_t bos = __builtin_object_size(s, 0);
if (n > bos)
__builtin_trap();
return vsnprintf(s, n, fmt, ap);
}
#undef fgets
#define fgets(s, n, fp) __fortify_fgets(s, n, fp)
#undef fread
#define fread(dst, n, nmemb, fp) __fortify_fread(dst, n, nmemb, fp)
#undef fwrite
#define fwrite(dst, n, nmemb, fp) __fortify_fwrite(dst, n, nmemb, fp)
#undef vsprintf
#define vsprintf(s, fmt, ap) __fortify_vsprintf(s, fmt, ap)
#undef vsnprintf
#define vsnprintf(s, n, fmt, ap) __fortify_vsnprintf(s, n, fmt, ap)
#undef snprintf
#define snprintf(s, n, fmt, ...) ({ \
size_t _n = n; \
size_t bos = __builtin_object_size(s, 0); \
if (_n > bos) \
__builtin_trap(); \
(snprintf)(s, _n, fmt, ## __VA_ARGS__); \
})
#undef sprintf
#define sprintf(s, fmt, ...) ({ \
size_t bos = __builtin_object_size(s, 0); \
int r; \
if (bos != (size_t)-1) { \
r = (snprintf)(s, bos, fmt, ## __VA_ARGS__); \
if (r != -1 && (size_t)r >= bos) \
__builtin_trap(); \
} else { \
r = (sprintf)(s, fmt, ## __VA_ARGS__); \
} \
r; \
})
#endif
#endif
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