Add Socket Libraries.

Add Posix functions for porting compatibility.
Fix compliance issues with ISO/IEC 9899:199409
New Functions:
  setenv(), fparseln(), GetFileNameFromPath(), rename(),
  realpath(), setprogname(), getprogname(), strlcat(), strlcpy(),
  strsep(), setitimer(), getitimer(), timegm(), getopt(), basename(),
  mkstemp(), ffs(), vsnprintf(), snprintf(), getpass(), usleep(), select(),
  writev(), strcasecmp(), getcwd(), chdir(), tcgetpgrp(), getpgrp(), gettimeofday(),
  bcopy(), 


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12061 6f19259b-4bc3-4df7-8a09-765794883524

StdLib/BsdSocketLib/read.c

@@ -0,0 +1,53 @@
+/** @file
+  Implement the read API.
+
+  Copyright (c) 2011, Intel Corporation
+  All rights reserved. This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <SocketInternals.h>
+
+
+/**
+  Read support routine for sockets
+
+  @param [in] pDescriptor   Descriptor address for the file
+  @param [in] pOffset       File offset
+  @param [in] LengthInBytes Number of bytes to read
+  @param [in] pBuffer       Address of the buffer to receive the data
+
+  @returns  The number of bytes read or -1 if an error occurs.
+
+**/
+ssize_t
+BslSocketRead (
+  struct __filedes *pDescriptor,
+  off_t * pOffset,
+  size_t LengthInBytes,
+  void * pBuffer
+  )
+{
+  ssize_t BytesRead;
+
+  //
+  //  Receive the data from the remote system
+  //
+  BytesRead = recvfrom ( pDescriptor->MyFD,
+                         pBuffer,
+                         LengthInBytes,
+                         0,
+                         NULL,
+                         NULL );
+
+  //
+  //  Return the number of bytes read
+  //
+  return BytesRead;
+}