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
49 static void Usage();
50 extern char **environ;
51
52
53 int
main(int argc,char ** argv)54 main(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
111 static void
Usage()112 Usage()
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