Wrote a new stdio.h, Implemented fcntl.h

libc/include/fcntl.h

@@ -0,0 +1,18 @@
+#ifndef _FCNTL_H
+#define _FCNTL_H
+
+/* File access modes */
+#define O_CREAT     0x0001  // Create if does not exist
+#define O_RDONLY    0x0002  // Read only
+#define O_WRONLY    0x0004  // Write only
+#define O_RDWR      0x0008  // Read and write
+#define O_APPEND    0x0010  // Always writes at the end (appends)
+#define O_TRUNC     0x0020  // Truncate file size and position to 0 on Open
+#define O_EXCL      0x0040  // Error if file exists (with O_CREAT)
+#define O_BIN       0x0080  // Read bytes, not text
+#define O_DIRECTORY 0x0100  // Error if file is not a directory
+// TODO: more!
+
+/* TODO: File lock */
+
+#endif