D9903.id26715.diff
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	Index: include/stddef.h
	===================================================================
	--- include/stddef.h
	+++ include/stddef.h
	@@ -72,4 +72,12 @@

	#define offsetof(type, member) __offsetof(type, member)

	+#if __EXT1_VISIBLE
	+/* ISO/IEC 9899:2011 K.3.3.2 */
	+#ifndef _RSIZE_T_DEFINED
	+#define _RSIZE_T_DEFINED
	+typedef size_t rsize_t;
	+#endif
	+#endif /* __EXT1_VISIBLE */
	+
	#endif /* _STDDEF_H_ */
	Index: include/stdlib.h
	===================================================================
	--- include/stdlib.h
	+++ include/stdlib.h
	@@ -323,6 +323,28 @@

	extern char suboptarg; / getsubopt(3) external variable */
	#endif /* __BSD_VISIBLE */
	+
	+#if __EXT1_VISIBLE
	+
	+#ifndef _ERRNO_T_DEFINED
	+#define _ERRNO_T_DEFINED
	+typedef int errno_t;
	+#endif
	+
	+/* K.3.6 */
	+typedef void (constraint_handler_t) (const char __restrict,
	+ void * __restrict, errno_t);
	+/* K.3.6.1.1 */
	+constraint_handler_t set_constraint_handler_s(
	+ constraint_handler_t handler);
	+/* K.3.6.1.2 */
	+_Noreturn void abort_handler_s(const char * __restrict,
	+ void * __restrict, errno_t);
	+/* K3.6.1.3 */
	+void ignore_handler_s(const char * __restrict, void * __restrict,
	+ errno_t);
	+#endif /* __EXT1_VISIBLE */
	+
	__END_DECLS
	__NULLABILITY_PRAGMA_POP

	Index: include/string.h
	===================================================================
	--- include/string.h
	+++ include/string.h
	@@ -141,6 +141,22 @@
	#if __POSIX_VISIBLE >= 200809 \|\| defined(_XLOCALE_H_)
	#include <xlocale/_string.h>
	#endif
	+
	+#if __EXT1_VISIBLE
	+
	+#ifndef _RSIZE_T_DEFINED
	+#define _RSIZE_T_DEFINED
	+typedef size_t rsize_t;
	+#endif
	+
	+#ifndef _ERRNO_T_DEFINED
	+#define _ERRNO_T_DEFINED
	+typedef int errno_t;
	+#endif
	+
	+/* ISO/IEC 9899:2011 K.3.7.4.1.1 */
	+errno_t memset_s(void *, rsize_t, int, rsize_t);
	+#endif /* __EXT1_VISIBLE */
	__END_DECLS

	#endif /* _STRING_H_ */
	Index: lib/libc/stdlib/Makefile.inc
	===================================================================
	--- lib/libc/stdlib/Makefile.inc
	+++ lib/libc/stdlib/Makefile.inc
	@@ -13,8 +13,8 @@
	insque.c l64a.c labs.c ldiv.c llabs.c lldiv.c lsearch.c \
	merge.c mergesort_b.c ptsname.c qsort.c qsort_r.c quick_exit.c \
	radixsort.c rand.c \
	- random.c reallocarray.c reallocf.c realpath.c remque.c strfmon.c \
	- strtoimax.c \
	+ random.c reallocarray.c reallocf.c realpath.c remque.c \
	+ set_constraint_handler_s.c strfmon.c strtoimax.c \
	strtol.c strtoll.c strtoq.c strtoul.c strtonum.c strtoull.c \
	strtoumax.c strtouq.c system.c tdelete.c tfind.c tsearch.c twalk.c

	Index: lib/libc/stdlib/Symbol.map
	===================================================================
	--- lib/libc/stdlib/Symbol.map
	+++ lib/libc/stdlib/Symbol.map
	@@ -119,6 +119,9 @@
	FBSD_1.5 {
	__cxa_thread_atexit;
	__cxa_thread_atexit_impl;
	+ abort_handler_s;
	+ ignore_handler_s;
	+ set_constraint_handler_s;
	};

	FBSDprivate_1.0 {
	Index: lib/libc/stdlib/set_constraint_handler_s.c
	===================================================================
	--- /dev/null
	+++ lib/libc/stdlib/set_constraint_handler_s.c
	@@ -0,0 +1,71 @@
	+/*-
	+ * Copyright (c) 2017 Juniper Networks. All rights reserved.
	+ *
	+ * Redistribution and use in source and binary forms, with or without
	+ * modification, are permitted provided that the following conditions
	+ * are met:
	+ * 1. Redistributions of source code must retain the above copyright
	+ * notice, this list of conditions and the following disclaimer.
	+ * 2. Redistributions in binary form must reproduce the above copyright
	+ * notice, this list of conditions and the following disclaimer in the
	+ * documentation and/or other materials provided with the distribution.
	+ *
	+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	+ * SUCH DAMAGE.
	+ */
	+
	+#include <sys/cdefs.h>
	+__FBSDID("$FreeBSD$");
	+
	+#include <errno.h>
	+#include <stddef.h>
	+#include <stdlib.h>
	+
	+/* rationale recommends allocating new memory each time */
	+static constraint_handler_t *_ch = NULL;
	+
	+constraint_handler_t
	+set_constraint_handler_s(constraint_handler_t handler)
	+{
	+ constraint_handler_t ret;
	+
	+ ret = NULL;
	+ if (_ch != NULL)
	+ ret = *_ch;
	+ if (_ch == NULL)
	+ _ch = (constraint_handler_t *)
	+ malloc(sizeof(constraint_handler_t));
	+ if (_ch != NULL)
	+ *_ch = handler;
	+ return (ret);
	+}
	+
	+void
	+__throw_constraint_handler_s(const char * restrict msg, errno_t error)
	+{
	+ if (_ch != NULL && *_ch != NULL)
	+ (*_ch)(msg, NULL, error);
	+}
	+
	+void
	+abort_handler_s(const char * restrict msg __unused,
	+ void * restrict ptr __unused, errno_t error __unused)
	+{
	+
	+ abort();
	+}
	+
	+void
	+ignore_handler_s(const char * restrict msg __unused,
	+ void * restrict ptr __unused, errno_t error __unused)
	+{
	+}
	Index: lib/libc/string/Makefile.inc
	===================================================================
	--- lib/libc/string/Makefile.inc
	+++ lib/libc/string/Makefile.inc
	@@ -10,7 +10,7 @@
	MISRCS+=bcmp.c bcopy.c bzero.c explicit_bzero.c \
	ffs.c ffsl.c ffsll.c fls.c flsl.c flsll.c \
	memccpy.c memchr.c memrchr.c memcmp.c \
	- memcpy.c memmem.c memmove.c memset.c \
	+ memcpy.c memmem.c memmove.c memset.c memset_s.c \
	stpcpy.c stpncpy.c strcasecmp.c \
	strcat.c strcasestr.c strchr.c strchrnul.c strcmp.c strcoll.c strcpy.c\
	strcspn.c strdup.c strerror.c strlcat.c strlcpy.c strlen.c strmode.c \
	Index: lib/libc/string/Symbol.map
	===================================================================
	--- lib/libc/string/Symbol.map
	+++ lib/libc/string/Symbol.map
	@@ -105,6 +105,7 @@
	};

	FBSD_1.5 {
	+ memset_s;
	timingsafe_bcmp;
	timingsafe_memcmp;
	};
	Index: lib/libc/string/memset_s.c
	===================================================================
	--- /dev/null
	+++ lib/libc/string/memset_s.c
	@@ -0,0 +1,65 @@
	+/*-
	+ * Copyright (c) 2017 Juniper Networks. All rights reserved.
	+ *
	+ * Redistribution and use in source and binary forms, with or without
	+ * modification, are permitted provided that the following conditions
	+ * are met:
	+ * 1. Redistributions of source code must retain the above copyright
	+ * notice, this list of conditions and the following disclaimer.
	+ * 2. Redistributions in binary form must reproduce the above copyright
	+ * notice, this list of conditions and the following disclaimer in the
	+ * documentation and/or other materials provided with the distribution.
	+ *
	+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	+ * SUCH DAMAGE.
	+ */
	+
	+#include <sys/cdefs.h>
	+__FBSDID("$FreeBSD$");
	+
	+#include <errno.h>
	+#include <stddef.h>
	+#include <stdint.h>
	+#include <string.h>
	+
	+void __throw_constraint_handler_s(const char * restrict msg,
	+ errno_t error);
	+
	+/* ISO/IEC 9899:2011 K.3.7.4.1 */
	+errno_t
	+memset_s(void *s, rsize_t smax, int c, rsize_t n)
	+{
	+ errno_t ret;
	+ rsize_t lim;
	+ unsigned char v;
	+ volatile unsigned char *dst;
	+
	+ ret = EINVAL;
	+ lim = smax;
	+ v = (unsigned char)c;
	+ dst = (unsigned char *)s;
	+ if (s == NULL) {
	+ __throw_constraint_handler_s("memset_s : s is NULL", ret);
	+ } else if (smax > RSIZE_MAX) {
	+ __throw_constraint_handler_s("memset_s : smax > RSIZE_MAX",
	+ ret);
	+ } else if (n > RSIZE_MAX) {
	+ __throw_constraint_handler_s("memset_s : n > RSIZE_MAX", ret);
	+ } else {
	+ if (n < smax)
	+ lim = n;
	+ while (lim > 0)
	+ dst[--lim] = v;
	+ ret = 0;
	+ }
	+ return (ret);
	+}
	Index: lib/libc/tests/stdlib/Makefile
	===================================================================
	--- lib/libc/tests/stdlib/Makefile
	+++ lib/libc/tests/stdlib/Makefile
	@@ -5,6 +5,7 @@
	ATF_TESTS_C+= heapsort_test
	ATF_TESTS_C+= mergesort_test
	ATF_TESTS_C+= qsort_test
	+ATF_TESTS_C+= set_constraint_handler_s_test
	ATF_TESTS_C+= tsearch_test
	.if ${COMPILER_FEATURES:Mc++11}
	ATF_TESTS_CXX+= cxa_thread_atexit_test
	Index: lib/libc/tests/stdlib/set_constraint_handler_s_test.c
	===================================================================
	--- /dev/null
	+++ lib/libc/tests/stdlib/set_constraint_handler_s_test.c
	@@ -0,0 +1,63 @@
	+/*-
	+ * Copyright (c) 2017 Juniper Networks. All rights reserved.
	+ *
	+ * Redistribution and use in source and binary forms, with or without
	+ * modification, are permitted provided that the following conditions
	+ * are met:
	+ * 1. Redistributions of source code must retain the above copyright
	+ * notice, this list of conditions and the following disclaimer.
	+ * 2. Redistributions in binary form must reproduce the above copyright
	+ * notice, this list of conditions and the following disclaimer in the
	+ * documentation and/or other materials provided with the distribution.
	+ *
	+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	+ * SUCH DAMAGE.
	+ */
	+
	+#include <sys/cdefs.h>
	+__FBSDID("$FreeBSD$");
	+
	+#include <assert.h>
	+#include <stdlib.h>
	+
	+#include <atf-c.h>
	+
	+/* null */
	+ATF_TC_WITHOUT_HEAD(null_handler);
	+ATF_TC_BODY(null_handler, tc)
	+{
	+ assert(set_constraint_handler_s(abort_handler_s) == NULL);
	+}
	+
	+/* abort handler */
	+ATF_TC_WITHOUT_HEAD(abort_handler);
	+ATF_TC_BODY(abort_handler, tc)
	+{
	+ set_constraint_handler_s(abort_handler_s);
	+ assert(set_constraint_handler_s(ignore_handler_s) == abort_handler_s);
	+}
	+
	+/* ignore handler */
	+ATF_TC_WITHOUT_HEAD(ignore_handler);
	+ATF_TC_BODY(ignore_handler, tc)
	+{
	+ set_constraint_handler_s(ignore_handler_s);
	+ assert(set_constraint_handler_s(abort_handler_s) == ignore_handler_s);
	+}
	+
	+ATF_TP_ADD_TCS(tp)
	+{
	+ ATF_TP_ADD_TC(tp, null_handler);
	+ ATF_TP_ADD_TC(tp, abort_handler);
	+ ATF_TP_ADD_TC(tp, ignore_handler);
	+ return (atf_no_error());
	+}
	Index: lib/libc/tests/string/Makefile
	===================================================================
	--- lib/libc/tests/string/Makefile
	+++ lib/libc/tests/string/Makefile
	@@ -1,6 +1,7 @@
	# $FreeBSD$

	ATF_TESTS_C+= memcmp_test
	+ATF_TESTS_C+= memset_s_test
	ATF_TESTS_C+= stpncpy_test
	ATF_TESTS_C+= strerror2_test
	ATF_TESTS_C+= wcscasecmp_test
	Index: lib/libc/tests/string/memset_s_test.c
	===================================================================
	--- /dev/null
	+++ lib/libc/tests/string/memset_s_test.c
	@@ -0,0 +1,195 @@
	+/*-
	+ * Copyright (c) 2017 Juniper Networks. All rights reserved.
	+ *
	+ * Redistribution and use in source and binary forms, with or without
	+ * modification, are permitted provided that the following conditions
	+ * are met:
	+ * 1. Redistributions of source code must retain the above copyright
	+ * notice, this list of conditions and the following disclaimer.
	+ * 2. Redistributions in binary form must reproduce the above copyright
	+ * notice, this list of conditions and the following disclaimer in the
	+ * documentation and/or other materials provided with the distribution.
	+ *
	+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	+ * SUCH DAMAGE.
	+ */
	+
	+#include <sys/cdefs.h>
	+__FBSDID("$FreeBSD$");
	+
	+#include <assert.h>
	+#include <stdint.h>
	+#include <stdlib.h>
	+#include <string.h>
	+
	+#include <atf-c.h>
	+
	+static errno_t e;
	+static const char * restrict m;
	+
	+void
	+h(const char * restrict msg, void * restrict ptr __unused, errno_t error)
	+{
	+ e = error;
	+ m = msg;
	+}
	+
	+/* null ptr */
	+ATF_TC_WITHOUT_HEAD(null_ptr);
	+ATF_TC_BODY(null_ptr, tc)
	+{
	+ assert(memset_s(0, 1, 1, 1) != 0);
	+}
	+
	+/* smax > rmax */
	+ATF_TC_WITHOUT_HEAD(smax_gt_rmax);
	+ATF_TC_BODY(smax_gt_rmax, tc)
	+{
	+ char b;
	+
	+ assert(memset_s(&b, RSIZE_MAX + 1, 1, 1) != 0);
	+}
	+
	+/* smax < 0 */
	+ATF_TC_WITHOUT_HEAD(smax_lt_zero);
	+ATF_TC_BODY(smax_lt_zero, tc)
	+{
	+ char b;
	+
	+ assert(memset_s(&b, -1, 1, 1) != 0);
	+}
	+
	+/* normal */
	+ATF_TC_WITHOUT_HEAD(normal);
	+ATF_TC_BODY(normal, tc)
	+{
	+ char b;
	+
	+ b = 3;
	+ assert(memset_s(&b, 1, 5, 1) == 0);
	+ assert(b == 5);
	+}
	+
	+/* n > rmax */
	+ATF_TC_WITHOUT_HEAD(n_gt_rmax);
	+ATF_TC_BODY(n_gt_rmax, tc)
	+{
	+ char b;
	+
	+ assert(memset_s(&b, 1, 1, RSIZE_MAX + 1) != 0);
	+}
	+
	+/* n < 0 */
	+ATF_TC_WITHOUT_HEAD(n_lt_zero);
	+ATF_TC_BODY(n_lt_zero, tc)
	+{
	+ char b;
	+
	+ assert(memset_s(&b, 1, 1, -1) != 0);
	+}
	+
	+/* n < smax */
	+ATF_TC_WITHOUT_HEAD(n_lt_smax);
	+ATF_TC_BODY(n_lt_smax, tc)
	+{
	+ char b[3] = {1, 2, 3};
	+
	+ assert(memset_s(&b[0], 3, 9, 1) == 0);
	+ assert(b[0] == 9);
	+ assert(b[1] == 2);
	+ assert(b[2] == 3);
	+}
	+
	+/* n > smax */
	+ATF_TC_WITHOUT_HEAD(n_gt_smax);
	+ATF_TC_BODY(n_gt_smax, tc)
	+{
	+ char b[3] = {1, 2, 3};
	+
	+ assert(memset_s(&b[0], 1, 9, 3) == 0);
	+ assert(b[0] == 9);
	+ assert(b[1] == 2);
	+ assert(b[2] == 3);
	+}
	+
	+/* smax > rmax, handler */
	+ATF_TC_WITHOUT_HEAD(smax_gt_rmax_handler);
	+ATF_TC_BODY(smax_gt_rmax_handler, tc)
	+{
	+ char b;
	+
	+ e = 0;
	+ m = NULL;
	+ set_constraint_handler_s(h);
	+ assert(memset_s(&b, RSIZE_MAX + 1, 1, 1) != 0);
	+ assert(e > 0);
	+ assert(strcmp(m, "memset_s : smax > RSIZE_MAX") == 0);
	+}
	+
	+/* smax < 0, handler */
	+ATF_TC_WITHOUT_HEAD(smax_lt_zero_handler);
	+ATF_TC_BODY(smax_lt_zero_handler, tc)
	+{
	+ char b;
	+
	+ e = 0;
	+ m = NULL;
	+ set_constraint_handler_s(h);
	+ assert(memset_s(&b, -1, 1, 1) != 0);
	+ assert(e > 0);
	+ assert(strcmp(m, "memset_s : smax > RSIZE_MAX") == 0);
	+}
	+
	+/* n > rmax, handler */
	+ATF_TC_WITHOUT_HEAD(n_gt_rmax_handler);
	+ATF_TC_BODY(n_gt_rmax_handler, tc)
	+{
	+ char b;
	+
	+ e = 0;
	+ m = NULL;
	+ set_constraint_handler_s(h);
	+ assert(memset_s(&b, 1, 1, RSIZE_MAX + 1) != 0);
	+ assert(e > 0);
	+ assert(strcmp(m, "memset_s : n > RSIZE_MAX") == 0);
	+}
	+
	+/* n < 0, handler */
	+ATF_TC_WITHOUT_HEAD(n_lt_zero_handler);
	+ATF_TC_BODY(n_lt_zero_handler, tc)
	+{
	+ char b;
	+
	+ e = 0;
	+ m = NULL;
	+ set_constraint_handler_s(h);
	+ assert(memset_s(&b, 1, 1, -1) != 0);
	+ assert(e > 0);
	+ assert(strcmp(m, "memset_s : n > RSIZE_MAX") == 0);
	+}
	+
	+ATF_TP_ADD_TCS(tp)
	+{
	+ ATF_TP_ADD_TC(tp, null_ptr);
	+ ATF_TP_ADD_TC(tp, smax_gt_rmax);
	+ ATF_TP_ADD_TC(tp, smax_lt_zero);
	+ ATF_TP_ADD_TC(tp, normal);
	+ ATF_TP_ADD_TC(tp, n_gt_rmax);
	+ ATF_TP_ADD_TC(tp, n_lt_zero);
	+ ATF_TP_ADD_TC(tp, n_gt_smax);
	+ ATF_TP_ADD_TC(tp, n_lt_smax);
	+ ATF_TP_ADD_TC(tp, smax_gt_rmax_handler);
	+ ATF_TP_ADD_TC(tp, smax_lt_zero_handler);
	+ ATF_TP_ADD_TC(tp, n_gt_rmax_handler);
	+ ATF_TP_ADD_TC(tp, n_lt_zero_handler);
	+ return (atf_no_error());
	+}
	Index: sys/sys/cdefs.h
	===================================================================
	--- sys/sys/cdefs.h
	+++ sys/sys/cdefs.h
	@@ -750,24 +750,38 @@
	#define __XSI_VISIBLE 0
	#define __BSD_VISIBLE 0
	#define __ISO_C_VISIBLE 1990
	+#define __EXT1_VISIBLE 0
	#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
	#define __POSIX_VISIBLE 0
	#define __XSI_VISIBLE 0
	#define __BSD_VISIBLE 0
	#define __ISO_C_VISIBLE 1999
	+#define __EXT1_VISIBLE 0
	#elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */
	#define __POSIX_VISIBLE 0
	#define __XSI_VISIBLE 0
	#define __BSD_VISIBLE 0
	#define __ISO_C_VISIBLE 2011
	+#define __EXT1_VISIBLE 0
	#else /* Default environment: show everything. */
	#define __POSIX_VISIBLE 200809
	#define __XSI_VISIBLE 700
	#define __BSD_VISIBLE 1
	#define __ISO_C_VISIBLE 2011
	+#define __EXT1_VISIBLE 1
	#endif
	#endif

	+/* User override __EXT1_VISIBLE */
	+#if defined(__STDC_WANT_LIB_EXT1__)
	+#undef __EXT1_VISIBLE
	+#if __STDC_WANT_LIB_EXT1__
	+#define __EXT1_VISIBLE 1
	+#else
	+#define __EXT1_VISIBLE 0
	+#endif
	+#endif /* __STDC_WANT_LIB_EXT1__ */
	+
	#if defined(__mips) \|\| defined(__powerpc64__) \|\| defined(__riscv__)
	#define __NO_TLS 1
	#endif
	Index: sys/sys/errno.h
	===================================================================
	--- sys/sys/errno.h
	+++ sys/sys/errno.h
	@@ -193,4 +193,12 @@
	#define ERELOOKUP (-5) /* retry the directory lookup */
	#endif

	+#if __EXT1_VISIBLE
	+/* ISO/IEC 9899:2011 K.3.2.2 */
	+#ifndef _ERRNO_T_DEFINED
	+#define _ERRNO_T_DEFINED
	+typedef int errno_t;
	+#endif
	+#endif /* __EXT1_VISIBLE */
	+
	#endif
	Index: sys/sys/stdint.h
	===================================================================
	--- sys/sys/stdint.h
	+++ sys/sys/stdint.h
	@@ -66,4 +66,11 @@
	#define WCHAR_MIN __WCHAR_MIN
	#define WCHAR_MAX __WCHAR_MAX

	+#if __EXT1_VISIBLE
	+/* ISO/IEC 9899:2011 K.3.4.4 */
	+#ifndef RSIZE_MAX
	+#define RSIZE_MAX (SIZE_MAX >> 1)
	+#endif
	+#endif /* __EXT1_VISIBLE */
	+
	#endif /* !_SYS_STDINT_H_ */

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