Merge from vendor branch TNFTP:
[dragonfly.git] / usr.bin / env / env.c
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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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)env.c 8.3 (Berkeley) 4/2/94
35 * $FreeBSD: src/usr.bin/env/env.c,v 1.5.2.3 2002/06/26 08:23:36 tjr Exp $
6fb88001 36 * $DragonFly: src/usr.bin/env/env.c,v 1.5 2006/01/12 13:43:10 corecode Exp $
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37 */
38
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39#include <err.h>
40#include <errno.h>
41#include <stdio.h>
42#include <string.h>
43#include <stdlib.h>
44#include <unistd.h>
45
46extern char **environ;
47
48static void usage(void);
49
50int
1d1731fa 51main(int argc, char **argv)
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52{
53 char **ep, *p;
54 char *cleanenv[1];
55 int ch;
56
57 while ((ch = getopt(argc, argv, "-i")) != -1)
58 switch(ch) {
59 case '-':
60 case 'i':
61 environ = cleanenv;
62 cleanenv[0] = NULL;
63 break;
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64 default:
65 usage();
66 }
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67 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv) {
68 if (setenv(*argv, ++p, 1) == -1)
6fb88001 69 err(1, "setenv: cannot set %s=%s", *argv, p);
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70 }
71
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72 if (*argv) {
73 execvp(*argv, argv);
74 err(errno == ENOENT ? 127 : 126, "%s", *argv);
75 }
76 for (ep = environ; *ep; ep++)
fa9cde45 77 printf("%s\n", *ep);
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78 exit(0);
79}
80
81static void
1d1731fa 82usage(void)
984263bc 83{
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84 fprintf(stderr,
85 "usage: env [-i] [name=value ...] [utility [argument ...]]\n");
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86 exit(1);
87}