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) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26/*
27 * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
28 *	  All Rights Reserved
29 */
30
31/*
32 *	env [ - ] [ name=value ]... [command arg...]
33 *	set environment, then execute command (or print environment)
34 *	- says start fresh, otherwise merge with inherited environment
35 */
36
37#include <stdio.h>
38#include <string.h>
39#include <stdlib.h>
40#include <errno.h>
41#include <unistd.h>
42#include <limits.h>
43#include <ctype.h>
44#include <locale.h>
45#include <string.h>
46#include <unistd.h>
47
48
49static	void	Usage();
50extern	char	**environ;
51
52
53int
54main(int argc, char **argv)
55{
56	char	**p;
57	int	opt;
58	int	i;
59
60
61	(void) setlocale(LC_ALL, "");
62
63#if	!defined(TEXT_DOMAIN)	/* Should be defined by cc -D */
64#define	TEXT_DOMAIN "SYS_TEST"	/* Use this only if it weren't */
65#endif
66	(void) textdomain(TEXT_DOMAIN);
67
68	/* check for non-standard "-" option */
69	if ((argc > 1) && (strcmp(argv[1], "-")) == 0) {
70		(void) clearenv();
71		for (i = 1; i < argc; i++)
72			argv[i] = argv[i+1];
73		argc--;
74	}
75
76	/* get options */
77	while ((opt = getopt(argc, argv, "i")) != EOF) {
78		switch (opt) {
79		case 'i':
80			(void) clearenv();
81			break;
82
83		default:
84			Usage();
85		}
86	}
87
88	/* get environment strings */
89	while (argv[optind] != NULL && strchr(argv[optind], '=') != NULL) {
90		if (putenv(argv[optind])) {
91			(void) perror(argv[optind]);
92			exit(1);
93		}
94		optind++;
95	}
96
97	/* if no utility, output environment strings */
98	if (argv[optind] == NULL) {
99		p = environ;
100		while (*p != NULL)
101			(void) puts(*p++);
102	} else {
103		(void) execvp(argv[optind],  &argv[optind]);
104		(void) perror(argv[0]);
105		exit(((errno == ENOENT) || (errno == ENOTDIR)) ? 127 : 126);
106	}
107	return (0);
108}
109
110
111static	void
112Usage()
113{
114	(void) fprintf(stderr, gettext(
115	    "Usage: env [-i] [name=value ...] [utility [argument ...]]\n"
116	    "       env [-] [name=value ...] [utility [argument ...]]\n"));
117	exit(1);
118}
119