1 files changed, 29 insertions, 0 deletions
diff --git a/src/string/strcat_s.c b/src/string/strcat_s.c
new file mode 100644
index 00000000..14db822d
--- /dev/null
+++ b/src/string/strcat_s.c
@@ -0,0 +1,29 @@
+#include "string.h"
+
+/** concatenate strings **/
+errno_t strcat_s(char * restrict s1, rsize_t s1max, const char * restrict s2)
+{
+	__C_EXT(1, 201112L);
+	__ASSERT_NONNULL(s1);
+	__ASSERT_NONNULL(s2);
+	__ASSERT_NOOVERLAP(s1, s2, strlen(s1) + strlen(s2));
+
+	return strncat(s1, s2, strlen(s2));
+}
+
+/***
+The fn(strcat) function appends a copy of the string at arg(s2) to the end of
+the string at arg(s1). The first byte of arg(s2) will overwrite the terminating
+null character of arg(s1).
+***/
+
+/* UNSPECIFIED: - */
+/* UNDEFINED: if arg(s1) and arg(s2) overlap */
+/* IMPLEMENTATION: - */
+/* LOCALE: - */
+
+/* RETURN: the value of arg(s1) */
+
+/*
+CEXT1(201112)
+*/