diff --git a/include/user/errno.h b/include/user/errno.h
index 8fd630a..1f332df 100644
--- a/include/user/errno.h
+++ b/include/user/errno.h
@@ -38,10 +38,13 @@
 #define ENOSYS          38
 #define ELOOP           40
 
+#define EOVERFLOW       75
 #define EADDRINUSE      98
 #define ECONNRESET      104
 #define ECONNREFUSED    111
 
+#define ENOTSUP         9926
+
 #if defined(__KERNEL__)
 const char *kstrerror(int e);
 #endif
diff --git a/include/user/fcntl.h b/include/user/fcntl.h
index 9a2c8d9..6eadc06 100644
--- a/include/user/fcntl.h
+++ b/include/user/fcntl.h
@@ -18,23 +18,27 @@
 //        execution
 #define O_EXEC          (1 << 2)
 
-#define O_ACCMODE       00000003
-#define O_RDONLY        00000000
-#define O_WRONLY        00000001
-#define O_RDWR          00000002
-#define O_CREAT         00000100
-// #define O_EXCL          00000200
+#define O_ACCMODE       (3 << 0)
+#define O_RDONLY        (0 << 0)
+#define O_WRONLY        (1 << 0)
+#define O_RDWR          (2 << 0)
+#define O_CREAT         (1 << 6)
+#define O_EXCL          (1 << 7)
+#define O_TRUNC         (1 << 9)
+#define O_APPEND        (1 << 10)
+#define O_DIRECTORY     (1 << 16)
+#define O_CLOEXEC       (1 << 19)
 // #define O_NOCTTY        00000400
-#define O_TRUNC         00001000
-#define O_APPEND        00002000
 // #define O_NONBLOCK      00004000
 // #define O_DSYNC         00010000
 // #define FASYNC          00020000
 // #define O_DIRECT        00040000
 // #define O_LARGEFILE     00100000
-//#define O_DIRECTORY     00200000
-#define O_DIRECTORY     0x200000
 // #define O_NOFOLLOW      00400000
 // #define O_NOATIME       01000000
-// #define O_CLOEXEC       02000000
-#define O_CLOEXEC       (1 << 19)
+
+#define FD_CLOEXEC      (1 << 0)
+
+// fcntl() commands
+#define F_GETFD         1
+#define F_SETFD         2
diff --git a/include/user/stat.h b/include/user/stat.h
index 2325959..16a7e0b 100644
--- a/include/user/stat.h
+++ b/include/user/stat.h
@@ -5,8 +5,10 @@
 #pragma once
 #if defined(__KERNEL__)
 #include "sys/types.h"
+#include "user/time.h"
 #else
 #include <ygg/types.h>
+#include <ygg/time.h>
 #endif
 
 #define S_IFMT          0170000
@@ -56,7 +58,7 @@ struct stat {
     uint32_t st_size;
     uint32_t st_blksize;
     uint32_t st_blocks;
-    uint32_t st_atime;
-    uint32_t st_mtime;
-    uint32_t st_ctime;
+    time_t st_atime;
+    time_t st_mtime;
+    time_t st_ctime;
 };