Fix a number of issues with the process handling

runtime/bin/socket.h

Index: runtime/bin/socket.h
diff --git a/runtime/bin/socket.h b/runtime/bin/socket.h
index 2823adae00a07a1af7a1f5c0f60b3de821a64e36..433565549e4912bf67975ccbd26cc70873d3d486 100644
--- a/runtime/bin/socket.h
+++ b/runtime/bin/socket.h
@@ -13,8 +13,8 @@ class Socket {
  public:
   static bool Initialize();
   static intptr_t Available(intptr_t fd);
-  static intptr_t Read(intptr_t fd, void* buffer, intptr_t num_bytes);
-  static intptr_t Write(intptr_t fd, const void* buffer, intptr_t num_bytes);
+  static int Read(intptr_t fd, void* buffer, intptr_t num_bytes);
+  static int Write(intptr_t fd, const void* buffer, intptr_t num_bytes);
   static intptr_t CreateConnect(const char* host, const intptr_t port);
   static intptr_t GetPort(intptr_t fd);
   static intptr_t GetStdioHandle(int num);