diff --git a/src/ddhx/common.d b/src/ddhx/common.d
index ed119ad..f8909e6 100644
--- a/src/ddhx/common.d
+++ b/src/ddhx/common.d
@@ -93,7 +93,8 @@
     
 }
 
-//TODO: --process - Memory edit by PID
+// TODO: Do not follow symlink
+// TODO: --process - Memory edit by PID
 string[] commonopts(string[] args)
 {
     GetoptResult res = void;
diff --git a/src/ddhx/document.d b/src/ddhx/document.d
index 04803a5..46d8147 100644
--- a/src/ddhx/document.d
+++ b/src/ddhx/document.d
@@ -7,6 +7,7 @@
 
 import ddhx.os.file;
 import ddhx.os.error;
+import std.file;
 
 private enum DocType
 {
@@ -26,12 +27,16 @@
     
     void openFile(string path, bool readOnly)
     {
+        if (isDir(path))
+            throw new Exception("Is a directory");
         int e = file.open(path, readOnly ? OFlags.read : OFlags.readWrite);
         if (e)
             throw new Exception(messageFromCode(e));
         doctype = DocType.disk;
     }
     
+    //
+    
     //void openProcess(int pid, bool readOnly)
     
     ubyte[] read(void *buffer, size_t size)
diff --git a/src/ddhx/os/error.d b/src/ddhx/os/error.d
index 54e10ff..7d5a93b 100644
--- a/src/ddhx/os/error.d
+++ b/src/ddhx/os/error.d
@@ -13,14 +13,14 @@
 else
 {
     import core.stdc.string;
+    import std.string;
 }
 
-import std.string;
-
 string messageFromCode(int code)
 {
 version (Windows)
 {
+    // TODO: Get console codepage
     enum BUFSZ = 1024;
     __gshared char[BUFSZ] buffer;
     uint len = FormatMessageA(
diff --git a/src/ddhx/os/file.d b/src/ddhx/os/file.d
index 99157de..9554fae 100644
--- a/src/ddhx/os/file.d
+++ b/src/ddhx/os/file.d
@@ -13,6 +13,7 @@
 {
     import core.sys.windows.winnt;
     import core.sys.windows.winbase;
+    import std.utf : toUTF16z;
     
     private alias OSHANDLE = HANDLE;
     private alias SEEK_SET = FILE_BEGIN;
@@ -29,6 +30,7 @@
     import core.sys.posix.fcntl;
     import core.stdc.errno;
     import core.stdc.stdio : SEEK_SET, SEEK_CUR, SEEK_END;
+    import std.string : toStringz;
     
     // BLKGETSIZE64 missing from dmd 2.098.1 and ldc 1.24.0
     // ldc 1.24 missing core.sys.linux.fs
@@ -56,7 +58,12 @@
     private enum BLKGETSIZE64 = cast(int)_IOR!(0x12,114,size_t.sizeof);
     private alias BLOCKSIZE = BLKGETSIZE64;
     
-    private extern (C) int ioctl(int,long,...);
+    version (Android)
+        alias off_t = int;
+    else
+        alias off_t = long;
+    
+    private extern (C) int ioctl(int,off_t,...);
     
     private alias OSHANDLE = int;
 }
@@ -68,9 +75,6 @@
 //TODO: FileType GetType(string)
 //      Pipe, device, etc.
 
-import std.string : toStringz;
-import std.utf : toUTF16z;
-
 /// File seek origin.
 enum Seek
 {
@@ -147,8 +151,8 @@
         {
             LARGE_INTEGER i = void;
             i.QuadPart = pos;
-            int r = SetFilePointerEx(handle, i, &i, origin);
-            return r == FALSE ? GetLastError : 0;
+            return SetFilePointerEx(handle, i, &i, origin) == FALSE ?
+                GetLastError() : 0;
         }
         else version (OSX)
         {