diff --git a/include/const.h b/include/const.h
new file mode 100644
index 0000000..7828e61
--- /dev/null
+++ b/include/const.h
@@ -0,0 +1,15 @@
+#ifndef _CONST_H
+#define _CONST_H
+
+#define BUFFER_END 0x200000
+
+#define I_TYPE          0170000
+#define I_DIRECTORY	0040000
+#define I_REGULAR       0100000
+#define I_BLOCK_SPECIAL 0060000
+#define I_CHAR_SPECIAL  0020000
+#define I_NAMED_PIPE	0010000
+#define I_SET_UID_BIT   0004000
+#define I_SET_GID_BIT   0002000
+
+#endif