busybox

/* vi: set sw=4 ts=4: */

/*

 * env implementation for busybox

 *

 * Copyright (c) 1988, 1993, 1994

 *  The Regents of the University of California.  All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 * Original copyright notice is retained at the end of this file.

 *

 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>

 */

​

/* BB_AUDIT SUSv3 compliant */

/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */

​

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)

 *

 * Fixed bug involving exit return codes if execvp fails.  Also added

 * output error checking.

 */

​

/*

 * Modified by Vladimir Oleynik <andersen@codepoet.org> (C) 2003

 * - corretion "-" option usage

 * - multiple "-u unsetenv" support

 * - GNU long option support

 * - save errno after exec failed before bb_perror_msg()

 */

​

​

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <errno.h>

#include <unistd.h>

#include <getopt.h>

#include "busybox.h"

​

​

static const struct option env_long_options[] = {

    { "ignore-environment", 0, NULL, 'i' },

    { "unset", 1, NULL, 'u' },

    { 0, 0, 0, 0 }

};

​

extern int env_main(int argc, char** argv)

{

    char **ep, *p;

    char *cleanenv[1] = { NULL };