diff --git a/sortix/fcntl.h b/sortix/fcntl.h
index fab9e3a0..3e7ffb64 100644
--- a/sortix/fcntl.h
+++ b/sortix/fcntl.h
@@ -48,6 +48,8 @@ __BEGIN_DECLS
 
 #define F_SETFD 0
 #define F_GETFD 1
+#define F_SETFL 2
+#define F_GETFL 3
 
 __END_DECLS
 
diff --git a/sortix/filesystem.cpp b/sortix/filesystem.cpp
index 93da49a6..cd4838e0 100644
--- a/sortix/filesystem.cpp
+++ b/sortix/filesystem.cpp
@@ -189,8 +189,24 @@ namespace Sortix
 			if ( !dev ) { Error::Set(EBADF); return -1; }
 			switch ( cmd )
 			{
-			case F_GETFD: return descs->GetFlags(fd);
 			case F_SETFD: descs->SetFlags(fd, (int) arg); return 0;
+			case F_GETFD: return descs->GetFlags(fd);
+			case F_SETFL: Error::Set(ENOSYS); return -1;
+			case F_GETFL:
+					if ( dev->IsType(Device::DIRECTORY) ) { return O_SEARCH; }
+					if ( !dev->IsType(Device::STREAM) )
+					{
+						Error::Set(ENOSYS);
+						return -1;
+					}
+					DevStream* stream = (DevStream*) stream;
+					bool write = stream->IsWritable();
+					bool read = stream->IsReadable();
+					if ( write && read ) { return O_RDWR; }
+					if ( write && !read ) { return O_WRONLY; }
+					if ( !write && read ) { return O_RDONLY; }
+					return O_EXEC;
+				break;
 			}
 			Error::Set(EINVAL);
 			return 1;