diff --git a/library/errno.c b/library/errno.c
new file mode 100644
index 0000000..03b4a05
--- /dev/null
+++ b/library/errno.c
@@ -0,0 +1,56 @@
+/*
+Copyright (C) 2016-2019 The University of Notre Dame
+This software is distributed under the GNU General Public License.
+See the file LICENSE for details.
+*/
+
+#include "kernel/error.h"
+#include "library/errno.h"
+#include "library/string.h"
+
+const char * strerror( kernel_error_t err_code) {
+	switch (err_code) {
+		case KERROR_NOT_FOUND:
+			return "Not Found";
+		case KERROR_INVALID_REQUEST:
+			return "Invalid Request";
+		case KERROR_PERMISSION_DENIED:
+			return "Permission Denied";
+		case KERROR_NOT_IMPLEMENTED:
+			return "Not Implemented";
+		case KERROR_NOT_EXECUTABLE:
+			return "Not Executable";
+		case KERROR_EXECUTION_FAILED:
+			return "Execution Failed";
+		case KERROR_NOT_A_DIRECTORY:
+			return "Not a Directory";
+		case KERROR_NOT_A_FILE:
+			return "Not a File";
+		case KERROR_NOT_A_WINDOW:
+			return "Not a Window";
+		case KERROR_NOT_A_DEVICE:
+			return "Not a Device";
+		case KERROR_NOT_A_CONSOLE:
+			return "Not a Console";
+		case KERROR_NOT_A_PIPE:
+			return "Not a Pipe";
+		case KERROR_INVALID_SYSCALL:
+			return "Invalid System Call";
+		case KERROR_INVALID_OBJECT:
+			return "Invalid Object";
+		case KERROR_INVALID_ADDRESS:
+			return "Invalid Address";
+		case KERROR_INVALID_PATH:
+			return "Invalid Path";
+		case KERROR_INVALID_TAG:
+			return "Invalid Tag";
+		case KERROR_OUT_OF_MEMORY:
+			return "Out of Memory";
+		case KERROR_OUT_OF_OBJECTS:
+			return "Out of Objects";
+		case KERROR_OUT_OF_SPACE:
+			return "Out of Space";
+		default:
+			return "Unknown error";
+	}
+}