--- /dev/null
+++ Libc/Libc-1244.30.3/include/secure/_string.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2007,2017 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef _STRING_H_
+# error "Never use <secure/_string.h> directly; include <string.h> instead."
+#endif
+
+#ifndef _SECURE__STRING_H_
+#define _SECURE__STRING_H_
+
+#include <sys/cdefs.h>
+#include <Availability.h>
+#include <secure/_common.h>
+
+#if _USE_FORTIFY_LEVEL > 0
+
+/* <rdar://problem/12622659> */
+#if defined(__clang__) && \
+		((defined(__apple_build_version__) && __apple_build_version__ >= 4260006) || \
+		(!defined(__apple_build_version__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 3))))
+#define __HAS_FIXED_CHK_PROTOTYPES 1
+#else
+#define __HAS_FIXED_CHK_PROTOTYPES 0
+#endif
+
+/* memccpy, memcpy, mempcpy, memmove, memset, strcpy, strlcpy, stpcpy,
+   strncpy, stpncpy, strcat, strlcat, and strncat */
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
+#if __has_builtin(__builtin___memccpy_chk) && __HAS_FIXED_CHK_PROTOTYPES
+#undef memccpy
+/* void *memccpy(void *dst, const void *src, int c, size_t n) */
+#define memccpy(dest, ...) \
+		__builtin___memccpy_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
+#endif
+#endif
+
+#if __has_builtin(__builtin___memcpy_chk) || defined(__GNUC__)
+#undef memcpy
+/* void *memcpy(void *dst, const void *src, size_t n) */
+#define memcpy(dest, ...) \
+		__builtin___memcpy_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
+#endif
+
+#if __has_builtin(__builtin___memmove_chk) || defined(__GNUC__)
+#undef memmove
+/* void *memmove(void *dst, const void *src, size_t len) */
+#define memmove(dest, ...) \
+		__builtin___memmove_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
+#endif
+
+#if __has_builtin(__builtin___memset_chk) || defined(__GNUC__)
+#undef memset
+/* void *memset(void *b, int c, size_t len) */
+#define memset(dest, ...) \
+		__builtin___memset_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
+#endif
+
+#if __has_builtin(__builtin___strcpy_chk) || defined(__GNUC__)
+#undef strcpy
+/* char *strcpy(char *dst, const char *src) */
+#define strcpy(dest, ...) \
+		__builtin___strcpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+
+#if __DARWIN_C_LEVEL >= 200809L
+#if __has_builtin(__builtin___stpcpy_chk) || defined(__GNUC__)
+#undef stpcpy
+/* char *stpcpy(char *dst, const char *src) */
+#define stpcpy(dest, ...) \
+		__builtin___stpcpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+
+#if __has_builtin(__builtin___stpncpy_chk) || __APPLE_CC__ >= 5666 || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)
+#undef stpncpy
+/* char *stpncpy(char *dst, const char *src, size_t n) */
+#define stpncpy(dest, ...) \
+		__builtin___stpncpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+#endif /* _DARWIN_C_LEVEL >= 200809L */
+
+#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
+#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
+#if __has_builtin(__builtin___strlcpy_chk) && __HAS_FIXED_CHK_PROTOTYPES
+#undef strlcpy
+/* size_t strlcpy(char *dst, const char *source, size_t size) */
+#define strlcpy(dest, ...) \
+		__builtin___strlcpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+
+#if __has_builtin(__builtin___strlcat_chk) && __HAS_FIXED_CHK_PROTOTYPES
+#undef strlcat
+/* size_t strlcat(char *dst, const char *source, size_t size) */
+#define strlcat(dest, ...) \
+		__builtin___strlcat_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+#endif /* __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 */
+#endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
+
+#if __has_builtin(__builtin___strncpy_chk) || defined(__GNUC__)
+#undef strncpy
+/* char *strncpy(char *dst, const char *src, size_t n) */
+#define strncpy(dest, ...) \
+		__builtin___strncpy_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+
+#if __has_builtin(__builtin___strcat_chk) || defined(__GNUC__)
+#undef strcat
+/* char *strcat(char *s1, const char *s2) */
+#define strcat(dest, ...) \
+		__builtin___strcat_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+
+#if ! (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 32000)
+#if __has_builtin(__builtin___strncat_chk) || defined(__GNUC__)
+#undef strncat
+/* char *strncat(char *s1, const char *s2, size_t n) */
+#define strncat(dest, ...) \
+		__builtin___strncat_chk (dest, __VA_ARGS__, __darwin_obsz (dest))
+#endif
+#endif
+
+#undef __HAS_FIXED_CHK_PROTOTYPES
+
+#endif /* _USE_FORTIFY_LEVEL > 0 */
+#endif /* _SECURE__STRING_H_ */