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Diffstat (limited to 'stdlib/bits/stdlib.h')
-rw-r--r--stdlib/bits/stdlib.h65
1 files changed, 53 insertions, 12 deletions
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
index 7ee7bf5..f6af5e5 100644
--- a/stdlib/bits/stdlib.h
+++ b/stdlib/bits/stdlib.h
@@ -27,12 +27,24 @@ extern char *__realpath_chk (__const char *__restrict __name,
extern char *__REDIRECT_NTH (__realpath_alias,
(__const char *__restrict __name,
char *__restrict __resolved), realpath) __wur;
+extern char *__REDIRECT_NTH (__realpath_chk_warn,
+ (__const char *__restrict __name,
+ char *__restrict __resolved,
+ size_t __resolvedlen), __realpath_chk) __wur
+ __warnattr ("second argument of realpath must be either NULL or at "
+ "least PATH_MAX bytes long buffer");
__extern_always_inline __wur char *
__NTH (realpath (__const char *__restrict __name, char *__restrict __resolved))
{
if (__bos (__resolved) != (size_t) -1)
- return __realpath_chk (__name, __resolved, __bos (__resolved));
+ {
+#if defined _LIBC_LIMITS_H_ && defined PATH_MAX
+ if (__bos (__resolved) < PATH_MAX)
+ return __realpath_chk_warn (__name, __resolved, __bos (__resolved));
+#endif
+ return __realpath_chk (__name, __resolved, __bos (__resolved));
+ }
return __realpath_alias (__name, __resolved);
}
@@ -43,13 +55,22 @@ extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
size_t __buflen), ptsname_r)
__nonnull ((2));
+extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
+ (int __fd, char *__buf, size_t __buflen,
+ size_t __nreal), __ptsname_r_chk)
+ __nonnull ((2)) __warnattr ("ptsname_r called with buflen bigger than "
+ "size of buf");
__extern_always_inline int
__NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
{
- if (__bos (__buf) != (size_t) -1
- && (!__builtin_constant_p (__buflen) || __buflen > __bos (__buf)))
- return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf));
+ if (__bos (__buf) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__buflen))
+ return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf));
+ if (__buflen > __bos (__buf))
+ return __ptsname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
+ }
return __ptsname_r_alias (__fd, __buf, __buflen);
}
@@ -82,16 +103,27 @@ extern size_t __REDIRECT_NTH (__mbstowcs_alias,
(wchar_t *__restrict __dst,
__const char *__restrict __src,
size_t __len), mbstowcs);
+extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn,
+ (wchar_t *__restrict __dst,
+ __const char *__restrict __src,
+ size_t __len, size_t __dstlen), __mbstowcs_chk)
+ __warnattr ("mbstowcs called with dst buffer smaller than len "
+ "* sizeof (wchar_t)");
__extern_always_inline size_t
__NTH (mbstowcs (wchar_t *__restrict __dst, __const char *__restrict __src,
size_t __len))
{
- if (__bos (__dst) != (size_t) -1
- && (!__builtin_constant_p (__len)
- || __len > __bos (__dst) / sizeof (wchar_t)))
- return __mbstowcs_chk (__dst, __src, __len,
- __bos (__dst) / sizeof (wchar_t));
+ if (__bos (__dst) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__len))
+ return __mbstowcs_chk (__dst, __src, __len,
+ __bos (__dst) / sizeof (wchar_t));
+
+ if (__len > __bos (__dst) / sizeof (wchar_t))
+ return __mbstowcs_chk_warn (__dst, __src, __len,
+ __bos (__dst) / sizeof (wchar_t));
+ }
return __mbstowcs_alias (__dst, __src, __len);
}
@@ -103,13 +135,22 @@ extern size_t __REDIRECT_NTH (__wcstombs_alias,
(char *__restrict __dst,
__const wchar_t *__restrict __src,
size_t __len), wcstombs);
+extern size_t __REDIRECT_NTH (__wcstombs_chk_warn,
+ (char *__restrict __dst,
+ __const wchar_t *__restrict __src,
+ size_t __len, size_t __dstlen), __wcstombs_chk)
+ __warnattr ("wcstombs called with dst buffer smaller than len");
__extern_always_inline size_t
__NTH (wcstombs (char *__restrict __dst, __const wchar_t *__restrict __src,
size_t __len))
{
- if (__bos (__dst) != (size_t) -1
- && (!__builtin_constant_p (__len) || __len > __bos (__dst)))
- return __wcstombs_chk (__dst, __src, __len, __bos (__dst));
+ if (__bos (__dst) != (size_t) -1)
+ {
+ if (!__builtin_constant_p (__len))
+ return __wcstombs_chk (__dst, __src, __len, __bos (__dst));
+ if (__len > __bos (__dst))
+ return __wcstombs_chk_warn (__dst, __src, __len, __bos (__dst));
+ }
return __wcstombs_alias (__dst, __src, __len);
}