NetBSD/lib/libc/stdlib/putenv.c

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/* $NetBSD: putenv.c,v 1.12 2003/08/07 16:43:42 agc Exp $ */
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/*-
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* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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 University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)putenv.c 8.2 (Berkeley) 3/27/94";
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#else
__RCSID("$NetBSD: putenv.c,v 1.12 2003/08/07 16:43:42 agc Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include <errno.h>
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#include <stdlib.h>
#include <string.h>
#ifdef __weak_alias
__weak_alias(putenv,_putenv)
#endif
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int
putenv(str)
const char *str;
{
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char *p, *equal;
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int rval;
_DIAGASSERT(str != NULL);
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if ((p = strdup(str)) == NULL)
return (-1);
if ((equal = strchr(p, '=')) == NULL) {
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(void)free(p);
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return (-1);
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}
*equal = '\0';
rval = setenv(p, equal + 1, 1);
(void)free(p);
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return (rval);
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}