1 /*
2 * Copyright (c) 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #ifndef lint
32 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\
33 The Regents of the University of California. All rights reserved.");
34 #endif /* not lint */
35
36 #ifndef lint
37 /*static char sccsid[] = "@(#)env.c 8.3 (Berkeley) 4/2/94";*/
38 __RCSID("$NetBSD: env.c,v 1.20 2010/11/16 02:53:49 christos Exp $");
39 #endif /* not lint */
40
41 #include <err.h>
42 #include <stdio.h>
43 #include <string.h>
44 #include <stdlib.h>
45 #include <unistd.h>
46 #include <locale.h>
47 #include <errno.h>
48
49 static void usage(void) __attribute__((__noreturn__));
50
51 extern char **environ;
52
53 int
main(int argc,char ** argv)54 main(int argc, char **argv)
55 {
56 char **ep;
57 char *cleanenv[1];
58 int ch;
59
60 setprogname(*argv);
61 (void)setlocale(LC_ALL, "");
62
63 while ((ch = getopt(argc, argv, "-i")) != -1)
64 switch((char)ch) {
65 case '-': /* obsolete */
66 case 'i':
67 environ = cleanenv;
68 cleanenv[0] = NULL;
69 break;
70 case '?':
71 default:
72 usage();
73 }
74
75 for (argv += optind; *argv && strchr(*argv, '=') != NULL; ++argv)
76 (void)putenv(*argv);
77
78 if (*argv) {
79 /* return 127 if the command to be run could not be found; 126
80 if the command was found but could not be invoked */
81
82 (void)execvp(*argv, argv);
83 err((errno == ENOENT) ? 127 : 126, "%s", *argv);
84 /* NOTREACHED */
85 }
86
87 for (ep = environ; *ep; ep++)
88 (void)printf("%s\n", *ep);
89
90 exit(0);
91 }
92
93 static void
usage(void)94 usage(void)
95 {
96 (void)fprintf(stderr, "Usage: %s [-i] [name=value ...] [command]\n",
97 getprogname());
98 exit(1);
99 }
100