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123 lines
3.7 KiB
123 lines
3.7 KiB
/**************************************************************************** |
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* sched/env_putenv.c |
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* |
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#ifndef CONFIG_DISABLE_ENVIRON |
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#include <stdlib.h> |
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#include <sched.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <nuttx/kmalloc.h> |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: putenv |
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* |
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* Description: |
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* The putenv() function adds or changes the value of environment variables. |
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* The argument string is of the form name=value. If name does not already |
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* exist in the environment, then string is added to the environment. If |
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* name does exist, then the value of name in the environment is changed to |
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* value. |
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* |
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* Parameters: |
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* name=value string describing the environment setting to add/modify |
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* |
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* Return Value: |
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* Zero on sucess |
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* |
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* Assumptions: |
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* Not called from an interrupt handler |
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* |
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****************************************************************************/ |
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int putenv(FAR const char *string) |
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{ |
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char *pname; |
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char *pequal; |
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int ret = OK; |
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/* Verify that a string was passed */ |
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if (!string) |
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{ |
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ret = EINVAL; |
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goto errout; |
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} |
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/* Parse the name=value string */ |
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pname = strdup(string); |
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if (!pname) |
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{ |
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ret = ENOMEM; |
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goto errout; |
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} |
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pequal = strchr( pname, '='); |
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if (pequal) |
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{ |
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/* Then let setenv do all of the work */ |
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*pequal = '\0'; |
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ret = setenv(pname, pequal+1, TRUE); |
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} |
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kfree(pname); |
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return ret; |
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errout: |
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errno = ret; |
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return ERROR; |
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} |
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#endif /* CONFIG_DISABLE_ENVIRON */ |
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