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/poll.c

@@ -0,0 +1,57 @@
+/** @file
+  Implement the poll 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>
+
+
+/**
+  Poll the socket for activity
+
+  @param [in] pDescriptor Descriptor address for the file
+
+  @param [in] Events      Mask of events to detect
+
+  @returns    Detected events for the socket
+
+ **/
+short
+BslSocketPoll (
+  IN struct __filedes * pDescriptor,
+  IN short Events
+  )
+{
+  short DetectedEvents;
+  EFI_SOCKET_PROTOCOL * pSocketProtocol;
+  EFI_STATUS Status;
+
+  //
+  //  Locate the socket protocol
+  //
+  DetectedEvents = 0;
+  pSocketProtocol = BslValidateSocketFd ( pDescriptor, &errno );
+  if ( NULL != pSocketProtocol ) {
+    //
+    //  Poll the socket
+    //
+    Status = pSocketProtocol->pfnPoll ( pSocketProtocol,
+                                        Events,
+                                        &DetectedEvents,
+                                        &errno );
+  }
+
+  //
+  //  Return the detected events
+  //
+  return DetectedEvents;
+}