diff options
Diffstat (limited to 'nuttx/sched/env_putenv.c')
-rw-r--r-- | nuttx/sched/env_putenv.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/nuttx/sched/env_putenv.c b/nuttx/sched/env_putenv.c new file mode 100644 index 000000000..ad00dd13d --- /dev/null +++ b/nuttx/sched/env_putenv.c @@ -0,0 +1,123 @@ +/**************************************************************************** + * sched/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 */ + + + |