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/listen.c

@@ -0,0 +1,65 @@
+/** @file
+  Implement the listen 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>
+
+
+/**
+  Establish the known port to listen for network connections.
+
+  The ::listen routine places the port into a state that enables connection
+  attempts.  Connections are placed into FIFO order in a queue to be serviced
+  by the application.  The application calls the ::accept routine to remove
+  the next connection from the queue and get the associated socket.  The
+  <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/listen.html">POSIX</a>
+  documentation for the bind routine is available online for reference.
+
+  @param [in] s         Socket file descriptor returned from ::socket.
+
+  @param [in] backlog   backlog specifies the maximum FIFO depth for the connections
+                        waiting for the application to call accept.  Connection attempts
+                        received while the queue is full are refused.
+
+  @returns    The listen routine returns zero (0) if successful and -1 upon failure.
+
+ **/
+int
+listen (
+  IN int s,
+  IN int backlog
+  )
+{
+  int ListenStatus;
+  EFI_SOCKET_PROTOCOL * pSocketProtocol;
+  EFI_STATUS Status;
+
+  //
+  //  Locate the context for this socket
+  //
+  pSocketProtocol = BslFdToSocketProtocol ( s, NULL, &errno );
+  if ( NULL != pSocketProtocol ) {
+    //
+    //  Enable connections on the known port
+    //
+    Status = pSocketProtocol->pfnListen ( pSocketProtocol,
+                                          backlog,
+                                          &errno );
+  }
+
+  //
+  //  Return the operation stauts
+  //
+  ListenStatus = ( 0 == errno ) ? 0 : -1;
+  return ListenStatus;
+}