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-rw-r--r--nuttx/sched/env_dup.c124
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diff --git a/nuttx/sched/env_dup.c b/nuttx/sched/env_dup.c
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-/****************************************************************************
- * sched/env_dup.c
- *
- * Copyright (C) 2007, 2009, 2011, 2013 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 <sys/types.h>
-#include <sched.h>
-#include <string.h>
-#include <errno.h>
-
-#include <nuttx/kmalloc.h>
-
-#include "os_internal.h"
-#include "env_internal.h"
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: env_dup
- *
- * Description:
- * Copy the internal environment structure of a task. This is the action
- * that is performed when a new task is created: The new task has a private,
- * exact duplicate of the parent task's environment.
- *
- * Parameters:
- * group The child task group to receive the newly allocated copy of the
- * parent task groups environment structure.
- *
- * Return Value:
- * zero on success
- *
- * Assumptions:
- * Not called from an interrupt handler.
- *
- ****************************************************************************/
-
-int env_dup(FAR struct task_group_s *group)
-{
- FAR _TCB *ptcb = (FAR _TCB*)g_readytorun.head;
- FAR char *envp = NULL;
- size_t envlen;
- int ret = OK;
-
- DEBUGASSERT(group && ptcb && ptcb->group);
-
- /* Pre-emption must be disabled throughout the following because the
- * environment may be shared.
- */
-
- sched_lock();
-
- /* Does the parent task have an environment? */
-
- if (ptcb->group && ptcb->group->tg_envp)
- {
- /* Yes..The parent task has an environment, duplicate it */
-
- envlen = ptcb->group->tg_envsize;
- envp = (FAR char *)kmalloc(envlen);
- if (!envp)
- {
- ret = -ENOMEM;
- }
- else
- {
- group->tg_envsize = envlen;
- group->tg_envp = envp;
- memcpy(envp, ptcb->group->tg_envp, envlen);
- }
- }
-
- sched_unlock();
- return ret;
-}
-
-#endif /* CONFIG_DISABLE_ENVIRON */
-
-
-