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File: [cvs.NetBSD.org] / pkgsrc / pkgtools / libnbcompat / files / setenv.c (download)

Revision 1.10, Mon Aug 23 03:32:12 2004 UTC (19 years, 8 months ago) by jlam
Branch: MAIN
CVS Tags: pkgsrc-2024Q1-base, pkgsrc-2024Q1, pkgsrc-2023Q4-base, pkgsrc-2023Q4, pkgsrc-2023Q3-base, pkgsrc-2023Q3, pkgsrc-2023Q2-base, pkgsrc-2023Q2, pkgsrc-2023Q1-base, pkgsrc-2023Q1, pkgsrc-2022Q4-base, pkgsrc-2022Q4, pkgsrc-2022Q3-base, pkgsrc-2022Q3, pkgsrc-2022Q2-base, pkgsrc-2022Q2, pkgsrc-2022Q1-base, pkgsrc-2022Q1, pkgsrc-2021Q4-base, pkgsrc-2021Q4, pkgsrc-2021Q3-base, pkgsrc-2021Q3, pkgsrc-2021Q2-base, pkgsrc-2021Q2, pkgsrc-2021Q1-base, pkgsrc-2021Q1, pkgsrc-2020Q4-base, pkgsrc-2020Q4, pkgsrc-2020Q3-base, pkgsrc-2020Q3, pkgsrc-2020Q2-base, pkgsrc-2020Q2, pkgsrc-2020Q1-base, pkgsrc-2020Q1, pkgsrc-2019Q4-base, pkgsrc-2019Q4, pkgsrc-2019Q3-base, pkgsrc-2019Q3, pkgsrc-2019Q2-base, pkgsrc-2019Q2, pkgsrc-2019Q1-base, pkgsrc-2019Q1, pkgsrc-2018Q4-base, pkgsrc-2018Q4, pkgsrc-2018Q3-base, pkgsrc-2018Q3, pkgsrc-2018Q2-base, pkgsrc-2018Q2, pkgsrc-2018Q1-base, pkgsrc-2018Q1, pkgsrc-2017Q4-base, pkgsrc-2017Q4, pkgsrc-2017Q3-base, pkgsrc-2017Q3, pkgsrc-2017Q2-base, pkgsrc-2017Q2, pkgsrc-2017Q1-base, pkgsrc-2017Q1, pkgsrc-2016Q4-base, pkgsrc-2016Q4, pkgsrc-2016Q3-base, pkgsrc-2016Q3, pkgsrc-2016Q2-base, pkgsrc-2016Q2, pkgsrc-2016Q1-base, pkgsrc-2016Q1, pkgsrc-2015Q4-base, pkgsrc-2015Q4, pkgsrc-2015Q3-base, pkgsrc-2015Q3, pkgsrc-2015Q2-base, pkgsrc-2015Q2, pkgsrc-2015Q1-base, pkgsrc-2015Q1, pkgsrc-2014Q4-base, pkgsrc-2014Q4, pkgsrc-2014Q3-base, pkgsrc-2014Q3, pkgsrc-2014Q2-base, pkgsrc-2014Q2, pkgsrc-2014Q1-base, pkgsrc-2014Q1, pkgsrc-2013Q4-base, pkgsrc-2013Q4, pkgsrc-2013Q3-base, pkgsrc-2013Q3, pkgsrc-2013Q2-base, pkgsrc-2013Q2, pkgsrc-2013Q1-base, pkgsrc-2013Q1, pkgsrc-2012Q4-base, pkgsrc-2012Q4, pkgsrc-2012Q3-base, pkgsrc-2012Q3, pkgsrc-2012Q2-base, pkgsrc-2012Q2, pkgsrc-2012Q1-base, pkgsrc-2012Q1, pkgsrc-2011Q4-base, pkgsrc-2011Q4, pkgsrc-2011Q3-base, pkgsrc-2011Q3, pkgsrc-2011Q2-base, pkgsrc-2011Q2, pkgsrc-2011Q1-base, pkgsrc-2011Q1, pkgsrc-2010Q4-base, pkgsrc-2010Q4, pkgsrc-2010Q3-base, pkgsrc-2010Q3, pkgsrc-2010Q2-base, pkgsrc-2010Q2, pkgsrc-2010Q1-base, pkgsrc-2010Q1, pkgsrc-2009Q4-base, pkgsrc-2009Q4, pkgsrc-2009Q3-base, pkgsrc-2009Q3, pkgsrc-2009Q2-base, pkgsrc-2009Q2, pkgsrc-2009Q1-base, pkgsrc-2009Q1, pkgsrc-2008Q4-base, pkgsrc-2008Q4, pkgsrc-2008Q3-base, pkgsrc-2008Q3, pkgsrc-2008Q2-base, pkgsrc-2008Q2, pkgsrc-2008Q1-base, pkgsrc-2008Q1, pkgsrc-2007Q4-base, pkgsrc-2007Q4, pkgsrc-2007Q3-base, pkgsrc-2007Q3, pkgsrc-2007Q2-base, pkgsrc-2007Q2, pkgsrc-2007Q1-base, pkgsrc-2007Q1, pkgsrc-2006Q4-base, pkgsrc-2006Q4, pkgsrc-2006Q3-base, pkgsrc-2006Q3, pkgsrc-2006Q2-base, pkgsrc-2006Q2, pkgsrc-2006Q1-base, pkgsrc-2006Q1, pkgsrc-2005Q4-base, pkgsrc-2005Q4, pkgsrc-2005Q3-base, pkgsrc-2005Q3, pkgsrc-2005Q2-base, pkgsrc-2005Q2, pkgsrc-2005Q1-base, pkgsrc-2005Q1, pkgsrc-2004Q4-base, pkgsrc-2004Q4, pkgsrc-2004Q3-base, pkgsrc-2004Q3, cwrapper-base, cwrapper, cube-native-xorg-base, cube-native-xorg, HEAD
Changes since 1.9: +82 -87 lines 

Update pkgtools/libnbcompat to 20040822.  Changes from version 20040814
include:

* Rework the way that poll() is detected so that it more closely
  follows how the rest of the replacement functions are detected.

* Split err*() and warn*() functions into separate err.c and warn.c
  files so that we can more finely isolate the objects files pulled
  in by the linker.  This should fix building textproc/nbsed on Solaris.

* Move more definitions from nbcompat.h into nbcompat/*.h.  This makes
  it more clear which NetBSD headers are expected to provide which
  function declarations and macro definitions.

* Clean out nbconfig.h by moving all of the relevant definitions into
  the correct nbcompat/*.h files.

* Update all of the library functions to the latest from src HEAD.
  Also change the way that sources are modified when imported -- we
  now include <nbcompat.h> before the first system header, include
  <nbcompat/*.h> versions of headers instead of system ones where
  available, and "#if 0" the sections that make no sense when being
  built outside of the NetBSD source tree.  This should make future
  updates from src HEAD, e.g. for security updates or bug fixes,
  easier.

* Move all private headers into a subdirectory and include the headers
  from the private directory.  This avoids any nameclashes with system
  headers with the same name.

/*	$NetBSD: setenv.c,v 1.10 2004/08/23 03:32:12 jlam Exp $	*/

/*
 * Copyright (c) 1987, 1993
 *	The Regents of the University of California.  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 University 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 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 <nbcompat.h>
#include <nbcompat/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)setenv.c	8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: setenv.c,v 1.10 2004/08/23 03:32:12 jlam Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#if 0
#include "namespace.h"
#endif

#include <nbcompat/assert.h>
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#include <nbcompat/stdlib.h>
#include <nbcompat/string.h>
#if 0
#include "local.h"
#include "reentrant.h"
#endif

char *__findenv __P((const char *, int *));

#if 0
#ifdef __weak_alias
__weak_alias(setenv,_setenv)
#endif
#endif

#if 0
#ifdef _REENTRANT
extern rwlock_t __environ_lock;
#endif
#endif

extern char **environ;

#ifndef rwlock_wrlock
#define rwlock_wrlock(lock)	((void)0)
#endif
#ifndef rwlock_unlock
#define rwlock_unlock(lock)	((void)0)
#endif

/*
 * setenv --
 *	Set the value of the environmental variable "name" to be
 *	"value".  If rewrite is set, replace any current value.
 */
int
setenv(name, value, rewrite)
	const char *name;
	const char *value;
	int rewrite;
{
	static int alloced;			/* if allocated space before */
	char *c;
	const char *cc;
	size_t l_value;
	int offset;

	_DIAGASSERT(name != NULL);
	_DIAGASSERT(value != NULL);

	if (*value == '=')			/* no `=' in value */
		++value;
	l_value = strlen(value);
	rwlock_wrlock(&__environ_lock);
	/* find if already exists */
	if ((c = __findenv(name, &offset)) != NULL) {
		if (!rewrite) {
			rwlock_unlock(&__environ_lock);
			return (0);
		}
		if (strlen(c) >= l_value) {	/* old larger; copy over */
			while ((*c++ = *value++) != '\0');
			rwlock_unlock(&__environ_lock);
			return (0);
		}
	} else {					/* create new slot */
		int cnt;
		char **p;

		for (p = environ, cnt = 0; *p; ++p, ++cnt);
		if (alloced) {			/* just increase size */
			environ = realloc(environ,
			    (size_t)(sizeof(char *) * (cnt + 2)));
			if (!environ) {
				rwlock_unlock(&__environ_lock);
				return (-1);
			}
		}
		else {				/* get new space */
			alloced = 1;		/* copy old entries into it */
			p = malloc((size_t)(sizeof(char *) * (cnt + 2)));
			if (!p) {
				rwlock_unlock(&__environ_lock);
				return (-1);
			}
			memcpy(p, environ, cnt * sizeof(char *));
			environ = p;
		}
		environ[cnt + 1] = NULL;
		offset = cnt;
	}
	for (cc = name; *cc && *cc != '='; ++cc)/* no `=' in name */
		continue;
	if (!(environ[offset] =			/* name + `=' + value */
	    malloc((size_t)((int)(cc - name) + l_value + 2)))) {
		rwlock_unlock(&__environ_lock);
		return (-1);
	}
	for (c = environ[offset]; (*c = *name++) && *c != '='; ++c);
	for (*c++ = '='; (*c++ = *value++) != '\0'; );
	rwlock_unlock(&__environ_lock);
	return (0);
}