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Diffstat (limited to 'nuttx/sched/env_getenvironptr.c')
-rw-r--r-- | nuttx/sched/env_getenvironptr.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/nuttx/sched/env_getenvironptr.c b/nuttx/sched/env_getenvironptr.c new file mode 100644 index 000000000..25b09755b --- /dev/null +++ b/nuttx/sched/env_getenvironptr.c @@ -0,0 +1,104 @@ +/**************************************************************************** + * 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 _TCB *ptcb = (FAR _TCB*)g_readytorun.head; + if (ptcb->envp) + { + return &ptcb->envp->ev_env; + } + else + { + return NULL; + } + +#endif +} + +#endif /* CONFIG_DISABLE_ENVIRON */ + + + |