1 files changed, 10 insertions, 0 deletions
diff --git a/libc/string/string.c b/libc/string/string.c
index f77cf4c69..29ac83a24 100644
--- a/libc/string/string.c
+++ b/libc/string/string.c
@@ -23,6 +23,16 @@ size_t strlen(const char *str)
 }
 #endif
 
+/********************** Function strnlen ************************************/
+
+#ifdef L_strnlen
+size_t strnlen (const char *string, size_t maxlen)
+{
+	const char *end = memchr (string, '\0', maxlen);
+	return end ? end - string : maxlen;
+}
+#endif
+
 /********************** Function strcat ************************************/
 
 #ifdef L_strcat