text: /****************************************************************************
   * env_getenvironptr.c
   *
   *   Copyright (C) 2007, 2008, 2011 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #ifndef CONFIG_DISABLE_ENVIRON
  
  #include <sched.h>
  #include <stdlib.h>
  #include "sched/sched.h"
  
  #undef get_environ_ptr
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: get_environ_ptr
   *
   * Description:
   *   Return a pointer to the thread specific environ variable.
   *
   * Parameters:
   *   None
   *
   * Return Value:
   *   A pointer to the per-thread environ variable.
   *
   * Assumptions:
   *
   ****************************************************************************/
  
  FAR char **get_environ_ptr(void)
  {
  #if 1
  
    /* Type of internal representation of environment is incompatible with
     * char ** return value.
     */
  
    return NULL;
  
  #else
  
    /* Return a reference to the thread-private environ in the TCB. */
  
    FAR struct tcb_s *ptcb = (FAR struct tcb_s *)g_readytorun.head;
    if (ptcb->envp)
      {
        return &ptcb->envp->ev_env;
      }
    else
      {
        return NULL;
      }
  
  #endif
  }
  
  #endif /* CONFIG_DISABLE_ENVIRON */
  
  