summaryrefslogtreecommitdiff
path: root/libio/bits
diff options
context:
space:
mode:
Diffstat (limited to 'libio/bits')
-rw-r--r--libio/bits/stdio2.h82
1 files changed, 64 insertions, 18 deletions
diff --git a/libio/bits/stdio2.h b/libio/bits/stdio2.h
index 841a0ff6aa..8889540689 100644
--- a/libio/bits/stdio2.h
+++ b/libio/bits/stdio2.h
@@ -131,14 +131,16 @@ vfprintf (FILE *__restrict __stream,
#endif
extern char *__gets_chk (char *__str, size_t) __wur;
-extern char *__REDIRECT (__gets_alias, (char *__str), gets) __wur;
+extern char *__REDIRECT (__gets_warn, (char *__str), gets)
+ __wur __warnattr ("please use fgets or getline instead, gets can't "
+ "specify buffer size");
__extern_always_inline __wur char *
gets (char *__str)
{
if (__bos (__str) != (size_t) -1)
return __gets_chk (__str, __bos (__str));
- return __gets_alias (__str);
+ return __gets_warn (__str);
}
extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n,
@@ -146,13 +148,23 @@ extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n,
extern char *__REDIRECT (__fgets_alias,
(char *__restrict __s, int __n,
FILE *__restrict __stream), fgets) __wur;
+extern char *__REDIRECT (__fgets_chk_warn,
+ (char *__restrict __s, size_t __size, int __n,
+ FILE *__restrict __stream), __fgets_chk)
+ __wur __warnattr ("fgets called with bigger size than length "
+ "of destination buffer");
__extern_always_inline __wur char *
fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
{
- if (__bos (__s) != (size_t) -1
- && (!__builtin_constant_p (__n) || (size_t) __n > __bos (__s)))
- return __fgets_chk (__s, __bos (__s), __n, __stream);
+ if (__bos (__s) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__n) || __n <= 0)
+ return __fgets_chk (__s, __bos (__s), __n, __stream);
+
+ if ((size_t) __n > __bos (__s))
+ return __fgets_chk_warn (__s, __bos (__s), __n, __stream);
+ }
return __fgets_alias (__s, __n, __stream);
}
@@ -163,17 +175,28 @@ extern size_t __REDIRECT (__fread_alias,
(void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream),
fread) __wur;
+extern size_t __REDIRECT (__fread_chk_warn,
+ (void *__restrict __ptr, size_t __ptrlen,
+ size_t __size, size_t __n,
+ FILE *__restrict __stream),
+ __fread_chk)
+ __wur __warnattr ("fread called with bigger size * nmemb than length "
+ "of destination buffer");
__extern_always_inline __wur size_t
fread (void *__restrict __ptr, size_t __size, size_t __n,
FILE *__restrict __stream)
{
- if (__bos0 (__ptr) != (size_t) -1
- && (!__builtin_constant_p (__size)
+ if (__bos0 (__ptr) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__size)
|| !__builtin_constant_p (__n)
- || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2))
- || __size * __n > __bos0 (__ptr)))
- return __fread_chk (__ptr, __bos0 (__ptr), __size, __n, __stream);
+ || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
+ return __fread_chk (__ptr, __bos0 (__ptr), __size, __n, __stream);
+
+ if (__size * __n > __bos0 (__ptr))
+ return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream);
+ }
return __fread_alias (__ptr, __size, __n, __stream);
}
@@ -183,13 +206,23 @@ extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size,
extern char *__REDIRECT (__fgets_unlocked_alias,
(char *__restrict __s, int __n,
FILE *__restrict __stream), fgets_unlocked) __wur;
+extern char *__REDIRECT (__fgets_unlocked_chk_warn,
+ (char *__restrict __s, size_t __size, int __n,
+ FILE *__restrict __stream), __fgets_unlocked_chk)
+ __wur __warnattr ("fgets_unlocked called with bigger size than length "
+ "of destination buffer");
__extern_always_inline __wur char *
fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
{
- if (__bos (__s) != (size_t) -1
- && (!__builtin_constant_p (__n) || (size_t) __n > __bos (__s)))
- return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream);
+ if (__bos (__s) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__n) || __n <= 0)
+ return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream);
+
+ if ((size_t) __n > __bos (__s))
+ return __fgets_unlocked_chk_warn (__s, __bos (__s), __n, __stream);
+ }
return __fgets_unlocked_alias (__s, __n, __stream);
}
#endif
@@ -203,17 +236,30 @@ extern size_t __REDIRECT (__fread_unlocked_alias,
(void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream),
fread_unlocked) __wur;
+extern size_t __REDIRECT (__fread_unlocked_chk_warn,
+ (void *__restrict __ptr, size_t __ptrlen,
+ size_t __size, size_t __n,
+ FILE *__restrict __stream),
+ __fread_unlocked_chk)
+ __wur __warnattr ("fread_unlocked called with bigger size * nmemb than "
+ "length of destination buffer");
__extern_always_inline __wur size_t
fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n,
FILE *__restrict __stream)
{
- if (__bos0 (__ptr) != (size_t) -1
- && (!__builtin_constant_p (__size)
+ if (__bos0 (__ptr) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__size)
|| !__builtin_constant_p (__n)
- || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2))
- || __size * __n > __bos0 (__ptr)))
- return __fread_unlocked_chk (__ptr, __bos0 (__ptr), __size, __n, __stream);
+ || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
+ return __fread_unlocked_chk (__ptr, __bos0 (__ptr), __size, __n,
+ __stream);
+
+ if (__size * __n > __bos0 (__ptr))
+ return __fread_unlocked_chk_warn (__ptr, __bos0 (__ptr), __size, __n,
+ __stream);
+ }
# ifdef __USE_EXTERN_INLINES
if (__builtin_constant_p (__size)