* stdlib/bits/stdlib.h: New file.

	* stdlib/stdlib.h: Include <bits/stdlib.h> if fortification is
	requested.
	* Makefile (headers): Add bits/stdlib.h.
	* include/bits/stdlib.h: New file.
	* debug/Depend: New file.
	* debug/ptsname_r_chk.c: New file.
	* debug/realpath_chk.c: New file.
	* debug/wctomb_chk.c: New file.
	* debug/Makefile (routines): Add ptsname_r_chk, realpath_chk, and
	wctomb_chk.
	* debug/Versions: Export __ptsname_r_chk, __realpath_chk, and
	__wctomb_chk.
	* debug/tst-chk1.c: Add tests for __ptsname_r_chk, __realpath_chk, and
	__wctomb_chk.

3 files changed, 82 insertions, 1 deletions

diff --git a/stdlib/Makefile b/stdlib/Makefile
index fafe6061a0..841663129d 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -23,7 +23,7 @@ subdir	:= stdlib
 
 headers	:= stdlib.h alloca.h monetary.h fmtmsg.h ucontext.h sys/ucontext.h    \
 	   inttypes.h stdint.h bits/wordsize.h bits/wchar.h		      \
-	   errno.h sys/errno.h bits/errno.h
+	   errno.h sys/errno.h bits/errno.h bits/stdlib.h
 
 routines	:=							      \
 	atof atoi atol atoll						      \
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
new file mode 100644
index 0000000000..e8286b0269
--- /dev/null
+++ b/stdlib/bits/stdlib.h
@@ -0,0 +1,75 @@
+/* Checking macros for stdlib functions.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _STDLIB_H
+# error "Never include <bits/stdlib.h> directly; use <stdlib.h> instead."
+#endif
+
+extern char *__realpath_chk (__const char *__restrict __name,
+			     char *__restrict __resolved,
+			     size_t __resolvedlen) __THROW __wur;
+extern char *__REDIRECT (__realpath_alias, (__const char *__restrict __name,
+					    char *__restrict __resolved),
+			 realpath) __THROW __wur;
+
+extern __always_inline __wur char *
+realpath (const char *__name, char *__resolved)
+{
+  if (__bos (__resolved) != (size_t) -1)
+    return __realpath_chk (__name, __resolved, __bos (__resolved));
+
+  return __realpath_alias (__name, __resolved);
+}
+
+
+extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
+			    size_t __nreal) __THROW __nonnull ((2));
+extern int __REDIRECT (__ptsname_r_alias, (int __fd, char *__buf,
+					   size_t __buflen), ptsname_r)
+     __THROW __nonnull ((2));
+
+extern __always_inline int
+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));
+  return __ptsname_r_alias (__fd, __buf, __buflen);
+}
+
+
+extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
+  __THROW __wur;
+extern int __REDIRECT (__wctomb_alias, (char *__s, wchar_t __wchar), wctomb)
+  __THROW __wur;
+
+extern __always_inline __wur int
+wctomb (char *__s, wchar_t __wchar)
+{
+  /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
+     But this would only disturb the namespace.  So we define our own
+     version here.  */
+#define __STDLIB_MB_LEN_MAX	16
+#if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
+# error "Assumed value of MB_LEN_MAX wrong"
+#endif
+  if (__bos (__s) != (size_t) -1 && __STDLIB_MB_LEN_MAX > __bos (__s))
+    return __wctomb_chk (__s, __wchar, __bos (__s));
+  return __wctomb_alias (__s, __wchar);
+}
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index 4a1571e7db..9e75e71ed6 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -961,6 +961,12 @@ extern int getloadavg (double __loadavg[], int __nelem)
      __THROW __nonnull ((1));
 #endif
 
+
+/* Define some macros helping to catch buffer overflows.  */
+#if __USE_FORTIFY_LEVEL > 0 && !defined __cplusplus
+# include <bits/stdlib.h>
+#endif
+
 #endif /* don't just need malloc and calloc */
 #undef __need_malloc_and_calloc