From c820eed56f8e30a524050d8f91148decfea1ec9b Mon Sep 17 00:00:00 2001
From: "A. Wilcox" <AWilcox@Wilcox-Tech.com>
Date: Tue, 7 May 2019 20:02:39 -0500
Subject: wchar: Add __wcscpy_chk

---
 CHANGELOG.rst      |  5 +++++
 libgcompat/wchar.c | 21 +++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 5a17069..a4d7698 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -11,6 +11,11 @@
 1.0.0 (20??-??-??)
 ==================
 
+wchar
+-----
+
+* Add __wcscpy_chk.
+
 
 0.4.0 (2019-05-03)
 ==================
diff --git a/libgcompat/wchar.c b/libgcompat/wchar.c
index c60963e..1a5a23c 100644
--- a/libgcompat/wchar.c
+++ b/libgcompat/wchar.c
@@ -39,6 +39,27 @@ int __vswprintf_chk(wchar_t *s, size_t n, int flag, size_t slen,
 	return vswprintf(s, n, format, ap);
 }
 
+/**
+ * Copy a wide-character string, with buffer overflow checking
+ *
+ * LSB 5.0: LSB-Core-generic/baselib---wcscpy-chk-1.html
+ */
+wchar_t *__wcscpy_chk(wchar_t *dest, const wchar_t *src, size_t n)
+{
+	size_t srclen = wcslen(src) + 1;
+
+	assert(dest != NULL);
+	assert(src != NULL);
+	assert(n >= srclen);
+	if (dest < src) {
+		assert(dest + n <= src);
+	} else {
+		assert(src + n <= dest);
+	}
+
+	return wcscpy(dest, src);
+}
+
 /**
  * Representation of the glibc internals of wcstol(3).
  *
-- 
cgit v1.2.3-70-g09d2