1/* vi: set sw=4 ts=4: */
2/*
3 * env implementation for busybox
4 *
5 * Copyright (c) 1988, 1993, 1994
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * Original copyright notice is retained at the end of this file.
23 *
24 * Modified for BusyBox by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
25 */
26
27#include <stdio.h>
28#include <string.h>
29#include <getopt.h>
30#include <stdlib.h>
31#include <unistd.h>
32#include "busybox.h"
33
34extern int env_main(int argc, char** argv)
35{
36	char **ep, *p;
37	char *cleanenv[1];
38	int ignore_environment = 0;
39	int ch;
40
41	while ((ch = getopt(argc, argv, "+iu:")) != -1) {
42		switch(ch) {
43		case 'i':
44			ignore_environment = 1;
45			break;
46		case 'u':
47			unsetenv(optarg);
48			break;
49		default:
50			show_usage();
51		}
52	}
53	if (optind != argc && !strcmp(argv[optind], "-")) {
54		ignore_environment = 1;
55		argv++;
56	}
57	if (ignore_environment) {
58		environ = cleanenv;
59		cleanenv[0] = NULL;
60	}
61	for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
62		if (putenv(*argv) < 0)
63			perror_msg_and_die("%s", *argv);
64	if (*argv) {
65		execvp(*argv, argv);
66		perror_msg_and_die("%s", *argv);
67	}
68	for (ep = environ; *ep; ep++)
69		puts(*ep);
70	return 0;
71}
72
73/*
74 * Copyright (c) 1988, 1993, 1994
75 *	The Regents of the University of California.  All rights reserved.
76 *
77 * Redistribution and use in source and binary forms, with or without
78 * modification, are permitted provided that the following conditions
79 * are met:
80 * 1. Redistributions of source code must retain the above copyright
81 *    notice, this list of conditions and the following disclaimer.
82 * 2. Redistributions in binary form must reproduce the above copyright
83 *    notice, this list of conditions and the following disclaimer in the
84 *    documentation and/or other materials provided with the distribution.
85 *
86 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
87 *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
88 *
89 * 4. Neither the name of the University nor the names of its contributors
90 *    may be used to endorse or promote products derived from this software
91 *    without specific prior written permission.
92 *
93 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
94 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
95 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
96 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
97 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
98 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
99 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
101 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
102 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
103 * SUCH DAMAGE.
104 */
105
106
107