1 files changed, 44 insertions, 0 deletions
diff --git a/lib/libspl/strnlen.c b/lib/libspl/strnlen.c
new file mode 100644
index 000000000..9fb8227b9
--- /dev/null
+++ b/lib/libspl/strnlen.c
@@ -0,0 +1,44 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.
+ * All rights reserved.  Use is subject to license terms.
+ */
+
+#include <string.h>
+#include <sys/types.h>
+
+/*
+ * Returns the number of non-NULL bytes in string argument,
+ * but not more than maxlen.  Does not look past str + maxlen.
+ */
+size_t
+strnlen(const char *str, size_t maxlen)
+{
+	const char *ptr;
+
+	ptr = memchr(str, 0, maxlen);
+	if (ptr == NULL)
+		return (maxlen);
+
+	return (ptr - str);
+}