Nucleus

diff --git a/include/sys/file.h b/include/sys/file.h
new file mode 100644
index 0000000..0a1cdbb
--- /dev/null
+++ b/include/sys/file.h
@@ -0,0 +1,35 @@
+#ifndef _SYS_FILE_H
+#define _SYS_FILE_H
+
+#include <stddef.h>
+#include <sys/types.h>
+
+#define O_ACCMODE 0003
+#define O_RDONLY    00
+#define O_WRONLY    01
+#define O_RDWR      02
+
+#define O_CREATE 0100
+#define O_TRUNC  0200
+
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int open(const char *name, int flags, ...); /* mode_t mode */
+int dup(int oldfd);
+int dup2(int oldfd, int newfd);
+int read(int fd, void *buf, size_t count);
+int write(int fd, void *buf, size_t count);
+off_t lseek(int fd, off_t offset, int whence);
+int close(int fd);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif