Move environment files from sched/ to sched/environ

sched/environ/Make.defs

@@ -0,0 +1,47 @@
+############################################################################
+# sched/environ/Make.defs
+#
+#   Copyright (C) 2014 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.
+#
+############################################################################
+
+ifneq ($(CONFIG_DISABLE_ENVIRON),y)
+
+ENV_SRCS  = env_getenvironptr.c env_dup.c env_release.c env_findvar.c
+ENV_SRCS += env_removevar.c env_clearenv.c env_getenv.c env_putenv.c
+ENV_SRCS += env_setenv.c env_unsetenv.c
+
+# Include environ build support
+
+DEPPATH += --dep-path environ
+VPATH += :environ
+
+endif

sched/environ/env_clearenv.c

@@ -0,0 +1,85 @@
+/****************************************************************************
+ * sched/environ/env_clearenv.c
+ *
+ *   Copyright (C) 2007, 2009, 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 <sched.h>
+#include <stdlib.h>
+#include "os_internal.h"
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: clearenv
+ *
+ * Description:
+ *   The clearenv() function clears the environment of all name-value pairs
+ *   and sets the value of the external variable environ to NULL.
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   None
+ *
+ * Assumptions:
+ *   Not called from an interrupt handler
+ *
+ ****************************************************************************/
+
+int clearenv(void)
+{
+  FAR struct tcb_s *tcb = (FAR struct tcb_s*)g_readytorun.head;
+  DEBUGASSERT(tcb->group);
+
+  env_release(tcb->group);
+  return OK;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+

sched/environ/env_dup.c

@@ -0,0 +1,124 @@
+/****************************************************************************
+ * sched/environ/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 "environ/environ.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 struct tcb_s *ptcb = (FAR struct tcb_s*)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 *)kumalloc(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 */
+
+
+

sched/environ/env_findvar.c

@@ -0,0 +1,126 @@
+/****************************************************************************
+ * sched/environ/env_findvar.c
+ *
+ *   Copyright (C) 2007, 2009, 2013-2014 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 <stdbool.h>
+#include <string.h>
+#include <sched.h>
+
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: env_cmpname
+ ****************************************************************************/
+
+static bool env_cmpname(const char *pszname, const char *peqname)
+{
+  /* Search until we find anything different in the two names */
+
+  for (; *pszname == *peqname; pszname++, peqname++);
+
+  /* On sucess, pszname will end with '\0' and peqname with '=' */
+
+  if ( *pszname == '\0' && *peqname == '=' )
+    {
+      return true;
+    }
+
+  return false;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: env_findvar
+ *
+ * Description:
+ *   Search the provided environment structure for the variable of the
+ *   specified name.
+ *
+ * Parameters:
+ *   group The task group containging environment array to be searched.
+ *   pname The variable name to find
+ *
+ * Return Value:
+ *   A pointer to the name=value string in the environment
+ *
+ * Assumptions:
+ *   - Not called from an interrupt handler
+ *   - Pre-emptions is disabled by caller
+ *
+ ****************************************************************************/
+
+FAR char *env_findvar(FAR struct task_group_s *group, const char *pname)
+{
+  char *ptr;
+  char *end;
+
+  /* Verify input parameters */
+
+  DEBUGASSERT(group && pname);
+
+  /* Search for a name=value string with matching name */
+
+  end = &group->tg_envp[group->tg_envsize];
+  for (ptr = group->tg_envp;
+       ptr < end && !env_cmpname(pname, ptr);
+       ptr += (strlen(ptr) + 1));
+
+  /* Check for success */
+
+  return (ptr < end) ? ptr : NULL;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+
+
+

sched/environ/env_getenv.c

@@ -0,0 +1,133 @@
+/****************************************************************************
+ * env_getenv.c
+ *
+ *   Copyright (C) 2007, 2008, 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 <sched.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "os_internal.h"
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: getenv
+ *
+ * Description:
+ *   The getenv() function searches the environment list for a string that
+ *   matches the string pointed to by name.
+ *
+ * Parameters:
+ *   name - The name of the variable to find.
+ *
+ * Return Value:
+ *   The value of the valiable (read-only) or NULL on failure
+ *
+ * Assumptions:
+ *   Not called from an interrupt handler
+ *
+ ****************************************************************************/
+
+FAR char *getenv(const char *name)
+{
+  FAR struct tcb_s *rtcb;
+  FAR struct task_group_s *group;
+  FAR char *pvar;
+  FAR char *pvalue = NULL;
+  int ret = OK;
+
+  /* Verify that a string was passed */
+
+  if (!name)
+    {
+      ret = EINVAL;
+      goto errout;
+    }
+
+  /* Get a reference to the thread-private environ in the TCB. */
+
+  sched_lock();
+  rtcb = (FAR struct tcb_s*)g_readytorun.head;
+  group = rtcb->group;
+
+  /* Check if the variable exists */
+
+  if ( !group || (pvar = env_findvar(group, name)) == NULL)
+    {
+      ret = ENOENT;
+      goto errout_with_lock;
+    }
+
+  /* It does!  Get the value sub-string from the name=value string */
+
+  pvalue = strchr(pvar, '=');
+  if (!pvalue)
+    {
+      /* The name=value string has no '='  This is a bug! */
+
+      ret = EINVAL;
+      goto errout_with_lock;
+    }
+
+  /* Adjust the pointer so that it points to the value right after the '=' */
+
+  pvalue++;
+  sched_unlock();
+  return pvalue;
+
+errout_with_lock:
+  sched_unlock();
+errout:
+  set_errno(ret);
+  return NULL;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+

sched/environ/env_getenvironptr.c

@@ -0,0 +1,102 @@
+/****************************************************************************
+ * 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 "os_internal.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 */
+

sched/environ/env_putenv.c

@@ -0,0 +1,123 @@
+/****************************************************************************
+ * sched/environ/env_putenv.c
+ *
+ *   Copyright (C) 2007-2009, 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 <stdlib.h>
+#include <sched.h>
+#include <string.h>
+#include <errno.h>
+
+#include <nuttx/kmalloc.h>
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: putenv
+ *
+ * Description:
+ *   The putenv() function adds or changes the value of environment variables.
+ *   The argument string is of the form name=value. If name does not already
+ *   exist in  the  environment, then string is added to the environment. If
+ *   name does exist, then the value of name in the environment is changed to
+ *   value.
+ *
+ * Parameters:
+ *   name=value string describing the environment setting to add/modify
+ *
+ * Return Value:
+ *   Zero on sucess
+ *
+ * Assumptions:
+ *   Not called from an interrupt handler
+ *
+ ****************************************************************************/
+
+int putenv(FAR const char *string)
+{
+  char *pname;
+  char *pequal;
+  int ret = OK;
+
+  /* Verify that a string was passed */
+
+  if (!string)
+    {
+      ret = EINVAL;
+      goto errout;
+    }
+
+  /* Parse the name=value string */
+
+  pname = strdup(string);
+  if (!pname)
+    {
+      ret = ENOMEM;
+      goto errout;
+    }
+
+  pequal = strchr( pname, '=');
+  if (pequal)
+    {
+      /* Then let setenv do all of the work */
+
+      *pequal = '\0';
+      ret = setenv(pname, pequal+1, TRUE);
+    }
+
+  kfree(pname);
+  return ret;
+
+errout:
+  errno = ret;
+  return ERROR;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+
+
+

sched/environ/env_release.c

@@ -0,0 +1,102 @@
+/****************************************************************************
+ * sched/environ/env_release.c
+ *
+ *   Copyright (C) 2007, 2009, 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 <sched.h>
+#include <errno.h>
+#include "os_internal.h"
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: env_release
+ *
+ * Description:
+ *   env_release() is called only from group_leave() when the last member of
+ *   a task group exits.  The env_release() function clears the environment
+ *   of all name-value pairs and sets the value of the external variable
+ *   environ to NULL.
+ *
+ * Parameters:
+ *   group Identifies the task group containing the environment structure
+ *     to be released.
+ *
+ * Return Value:
+ *   None
+ *
+ * Assumptions:
+ *   Not called from an interrupt handler
+ *
+ ****************************************************************************/
+
+void env_release(FAR struct task_group_s *group)
+{
+  DEBUGASSERT(group);
+
+  /* Free any allocate environment strings */
+
+  if (group->tg_envp)
+    {
+      /* Free the environment */
+
+      sched_ufree(group->tg_envp);
+    }
+
+  /* In any event, make sure that all environment-related varialbles in the
+   * task group structure are reset to initial values.
+   */
+
+  group->tg_envsize = 0;
+  group->tg_envp = NULL;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+
+
+

sched/environ/env_removevar.c

@@ -0,0 +1,123 @@
+/****************************************************************************
+ * sched/environ/env_removevar.c
+ *
+ *   Copyright (C) 2007, 2009 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 <string.h>
+#include <sched.h>
+
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: env_removevar
+ *
+ * Description:
+ *   Remove the referenced name=value pair from the environment
+ *
+ * Parameters:
+ *   group The task group with the environment containing the name=value pair
+ *   pvar A pointer to the name=value pair in the restroom
+ *
+ * Return Value:
+ *   Zero on success
+ *
+ * Assumptions:
+ *   - Not called from an interrupt handler
+ *   - Caller has pre-emptions disabled
+ *   - Caller will reallocate the environment structure to the correct size
+ *
+ ****************************************************************************/
+
+int env_removevar(FAR struct task_group_s *group, FAR char *pvar)
+{
+  FAR char *end;    /* Pointer to the end+1 of the environment */
+  int alloc;        /* Size of the allocated environment */
+  int ret = ERROR;
+
+  DEBUGASSERT(group && pvar);
+
+  /* Verify that the pointer lies within the environment region */
+
+  alloc = group->tg_envsize;          /* Size of the allocated environment */
+  end   = &group->tg_envp[alloc];     /* Pointer to the end+1 of the environment */
+
+  if (pvar >= group->tg_envp && pvar < end)
+    {
+      /* Set up for the removal */
+
+      int   len  = strlen(pvar) + 1;  /* Length of name=value string to remove */
+      char *src  = &pvar[len];        /* Address of name=value string after */
+      char *dest = pvar;              /* Location to move the next string */
+      int   count = end - src;        /* Number of bytes to move (might be zero) */
+
+      /* Move all of the environment strings after the removed one 'down.'
+       * this is inefficient, but robably not high duty.
+       */
+
+      while (count-- > 0)
+        {
+          *dest++ = *src++;
+        }
+
+      /* Then set to the new allocation size.  The caller is expected to
+       * call realloc at some point but we don't do that here because the
+       * caller may add more stuff to the environment.
+       */
+
+      group->tg_envsize -= len;
+      ret = OK;
+    }
+
+  return ret;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+
+
+

sched/environ/env_setenv.c

@@ -0,0 +1,205 @@
+/****************************************************************************
+ * sched/environ/env_setenv.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 <stdio.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <string.h>
+#include <errno.h>
+
+#include <nuttx/kmalloc.h>
+
+#include "os_internal.h"
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: setenv
+ *
+ * Description:
+ *   The setenv() function adds the variable name to the environment with the
+ *   specified 'value' if the varialbe 'name" does not exist. If the 'name'
+ *   does exist in the environment, then its value is changed to 'value' if
+ *   'overwrite' is non-zero; if 'overwrite' is zero, then the value of name
+ *   unaltered.
+ *
+ * Parameters:
+ *   name - The name of the variable to change
+ *   value - The new value of the variable
+ *   overwrite - Replace any existing value if non-zero.
+ *
+ * Return Value:
+ *   Zero on success
+ *
+ * Assumptions:
+ *   Not called from an interrupt handler
+ *
+ ****************************************************************************/
+
+int setenv(FAR const char *name, FAR const char *value, int overwrite)
+{
+  FAR struct tcb_s *rtcb;
+  FAR struct task_group_s *group;
+  FAR char *pvar;
+  FAR char *newenvp;
+  int newsize;
+  int varlen;
+  int ret = OK;
+
+  /* Verify input parameter */
+
+  if (!name)
+    {
+      ret = EINVAL;
+      goto errout;
+    }
+
+  /* if no value is provided, then this is the same as unsetenv (unless
+   * overwrite is false)
+   */
+
+  if (!value || *value == '\0')
+    {
+      /* If overwite is set then this is the same as unsetenv */
+
+      if (overwrite)
+        {
+          return unsetenv(name);
+        }
+      else
+        {
+          /* Otherwise, it is a request to remove a variable without altering it? */
+
+          return OK;
+        }
+    }
+
+  /* Get a reference to the thread-private environ in the TCB. */
+
+  sched_lock();
+  rtcb  = (FAR struct tcb_s*)g_readytorun.head;
+  group = rtcb->group;
+  DEBUGASSERT(group);
+
+  /* Check if the variable already exists */
+
+  if (group->tg_envp && (pvar = env_findvar(group, name)) != NULL)
+    {
+      /* It does! Do we have permission to overwrite the existing value? */
+
+      if (!overwrite)
+        {
+          /* No.. then just return success */
+
+          sched_unlock();
+          return OK;
+        }
+
+      /* Yes.. just remove the name=value pair from the environment.  It will
+       * be added again below.  Note that we are responsible for reallocating
+       * the environment buffer; this will happen below.
+       */
+
+      (void)env_removevar(group, pvar);
+    }
+
+  /* Get the size of the new name=value string.  The +2 is for the '=' and for
+   * null terminator
+   */
+
+  varlen = strlen(name) + strlen(value) + 2;
+
+  /* Then allocate or reallocate the environment buffer */
+
+  if (group->tg_envp)
+    {
+      newsize = group->tg_envsize + varlen;
+      newenvp = (FAR char *)kurealloc(group->tg_envp, newsize);
+      if (!newenvp)
+        {
+          ret = ENOMEM;
+          goto errout_with_lock;
+        }
+
+      pvar = &newenvp[group->tg_envsize];
+    }
+  else
+    {
+      newsize = varlen;
+      newenvp = (FAR char *)kumalloc(varlen);
+      if (!newenvp)
+        {
+          ret = ENOMEM;
+          goto errout_with_lock;
+        }
+
+      pvar = newenvp;
+    }
+
+  /* Save the new buffer and size */
+
+  group->tg_envp    = newenvp;
+  group->tg_envsize = newsize;
+
+  /* Now, put the new name=value string into the environment buffer */
+
+  sprintf(pvar, "%s=%s", name, value);
+  sched_unlock();
+  return OK;
+
+errout_with_lock:
+  sched_unlock();
+errout:
+  errno = ret;
+  return ERROR;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+

sched/environ/env_unsetenv.c

@@ -0,0 +1,124 @@
+/****************************************************************************
+ * sched/environ/env_unsetenv.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 <sched.h>
+#include <string.h>
+#include <errno.h>
+
+#include <nuttx/kmalloc.h>
+
+#include "os_internal.h"
+#include "environ/environ.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: unsetenv
+ *
+ * Description:
+ *   The unsetenv() function deletes the variable name from the environment.
+ *
+ * Parameters:
+ *   name - The name of the variable to delete
+ *
+ * Return Value:
+ *   Zero on success
+ *
+ * Assumptions:
+ *   Not called from an interrupt handler
+ *
+ ****************************************************************************/
+
+int unsetenv(FAR const char *name)
+{
+  FAR struct tcb_s *rtcb = (FAR struct tcb_s*)g_readytorun.head;
+  FAR struct task_group_s *group = rtcb->group;
+  FAR char *pvar;
+  FAR char *newenvp;
+  int newsize;
+  int ret = OK;
+
+  DEBUGASSERT(name && group);
+
+  /* Check if the variable exists */
+
+  sched_lock();
+  if (group && (pvar = env_findvar(group, name)) != NULL)
+    {
+      /* It does!  Remove the name=value pair from the environment. */
+
+      (void)env_removevar(group, pvar);
+
+      /* Reallocate the new environment buffer */
+
+      newsize = group->tg_envsize;
+      newenvp = (FAR char *)kurealloc(group->tg_envp, newsize);
+      if (!newenvp)
+        {
+          set_errno(ENOMEM);
+          ret = ERROR;
+        }
+      else
+        {
+          /* Save the new environment pointer (it might have changed due to
+           * reallocation.
+           */
+
+          group->tg_envp = newenvp;
+        }
+    }
+
+  sched_unlock();
+  return ret;
+}
+
+#endif /* CONFIG_DISABLE_ENVIRON */
+
+
+

sched/environ/environ.h

@@ -0,0 +1,93 @@
+/****************************************************************************
+ * sched/environ/environ.h
+ *
+ *   Copyright (C) 2007, 2009, 2013-2014 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.
+ *
+ ****************************************************************************/
+
+#ifndef __SCHED_ENVIRON_ENVIRON_H
+#define __SCHED_ENVIRON_ENVIRON_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/sched.h>
+#include "os_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+#ifdef CONFIG_DISABLE_ENVIRON
+# define env_dup(group)     (0)
+# define env_release(group) (0)
+#else
+
+/****************************************************************************
+ * Public Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/* Functions used by the task/pthread creation and destruction logic */
+
+int env_dup(FAR struct task_group_s *group);
+void env_release(FAR struct task_group_s *group);
+
+/* Functions used internally by the environment handling logic */
+
+FAR char *env_findvar(FAR struct task_group_s *group, FAR const char *pname);
+int env_removevar(FAR struct task_group_s *group, FAR char *pvar);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !CONFIG_DISABLE_ENVIRON */
+#endif /* __SCHED_ENVIRON_ENVIRON_H */
+