1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
24 */
25/*
26 * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
27 */
28
29/*
30 * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
31 *	  All Rights Reserved
32 */
33
34/*
35 *	env [ - ] [ name=value ]... [command arg...]
36 *	set environment, then execute command (or print environment)
37 *	- says start fresh, otherwise merge with inherited environment
38 */
39
40#include <stdio.h>
41#include <string.h>
42#include <stdlib.h>
43#include <errno.h>
44#include <unistd.h>
45#include <limits.h>
46#include <ctype.h>
47#include <locale.h>
48#include <string.h>
49#include <unistd.h>
50
51
52static	void	Usage();
53extern	char	**environ;
54
55
56int
57main(int argc, char **argv)
58{
59	char	**p;
60	int	opt;
61	int	i;
62
63
64	(void) setlocale(LC_ALL, "");
65
66#if	!defined(TEXT_DOMAIN)	/* Should be defined by cc -D */
67#define	TEXT_DOMAIN "SYS_TEST"	/* Use this only if it weren't */
68#endif
69	(void) textdomain(TEXT_DOMAIN);
70
71	/* check for non-standard "-" option */
72	if ((argc > 1) && (strcmp(argv[1], "-")) == 0) {
73		(void) clearenv();
74		for (i = 1; i < argc; i++)
75			argv[i] = argv[i+1];
76		argc--;
77	}
78
79	/* get options */
80	while ((opt = getopt(argc, argv, "i")) != EOF) {
81		switch (opt) {
82		case 'i':
83			(void) clearenv();
84			break;
85
86		default:
87			Usage();
88		}
89	}
90
91	/* get environment strings */
92	while (argv[optind] != NULL && strchr(argv[optind], '=') != NULL) {
93		if (putenv(argv[optind])) {
94			(void) perror(argv[optind]);
95			exit(1);
96		}
97		optind++;
98	}
99
100	/* if no utility, output environment strings */
101	if (argv[optind] == NULL) {
102		p = environ;
103		while (*p != NULL)
104			(void) puts(*p++);
105	} else {
106		(void) execvp(argv[optind],  &argv[optind]);
107		(void) fprintf(stderr, "%s: %s: %s\n", argv[0], argv[optind],
108		    strerror(errno));
109		exit(((errno == ENOENT) || (errno == ENOTDIR)) ? 127 : 126);
110	}
111	return (0);
112}
113
114
115static	void
116Usage()
117{
118	(void) fprintf(stderr, gettext(
119	    "Usage: env [-i] [name=value ...] [utility [argument ...]]\n"
120	    "       env [-] [name=value ...] [utility [argument ...]]\n"));
121	exit(1);
122}
123