--- /dev/null
+#ifndef ERRNO_H_
+#define ERRNO_H_
+
+#define EFOO 1
+#define EAGAIN 2
+#define EINVAL 3
+#define ECHILD 4
+#define EBUSY 5
+#define ENOMEM 6
+#define EIO 7
+#define ENOENT 8
+#define ENAMETOOLONG 9
+#define ENOSPC 10
+#define EPERM 11
+#define ENOTDIR 12
+#define EISDIR 13
+#define EEXIST 14
+#define ERANGE 34
+
+#define EBUG 127 /* for missing features and known bugs */
+
+int errno;
+
+#endif /* ERRNO_H_ */