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/*
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*/
#include <config.h>
#include <stdlib.h>
#if !HAVE_DECL_ENVIRON
extern char **environ;
#endif
/*
* putenv --
* String points to a string of the form name=value.
*
* Makes the value of the environment variable name equal to
* value by altering an existing variable or creating a new one.
*/
ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
putenv(const char *string)
{
int i;
const char *eq = (const char *)strchr(string, '=');
int len;
if (eq == NULL)
return 1;
len = eq - string;
if(environ == NULL) {
environ = malloc(sizeof(char*));
if(environ == NULL)
return 1;
environ[0] = NULL;
}
for(i = 0; environ[i] != NULL; i++)
if(strncmp(string, environ[i], len) == 0) {
environ[i] = string;
return 0;
}
environ = realloc(environ, sizeof(char*) * (i + 2));
if(environ == NULL)
return 1;
environ[i] = string;
environ[i+1] = NULL;
return 0;
}
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