1 /* $OpenBSD: env.c,v 1.10 2003/06/10 22:20:46 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 1988, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\
34 The Regents of the University of California. All rights reserved.\n");
35 __SCCSID("@(#)env.c 8.3 (Berkeley) 4/2/94");
36 __RCSID("$MirOS: src/usr.bin/env/env.c,v 1.2 2007/07/05 23:09:40 tg Exp $");
37
38 #include <err.h>
39 #include <stdio.h>
40 #include <string.h>
41 #include <stdlib.h>
42 #include <unistd.h>
43 #include <locale.h>
44 #include <errno.h>
45
46 void usage(void);
47
48 int
main(int argc,char * argv[])49 main(int argc, char *argv[])
50 {
51 extern char **environ;
52 extern int optind;
53 char **ep, *p;
54 int ch;
55
56 #ifndef __MirBSD__
57 setlocale(LC_ALL, "");
58 #endif
59
60 while ((ch = getopt(argc, argv, "i-")) != -1)
61 switch((char)ch) {
62 case '-': /* obsolete */
63 case 'i':
64 if ((environ = (char **)calloc(1, sizeof(char *))) == NULL)
65 err(126, "calloc");
66 break;
67 case '?':
68 default:
69 usage();
70 }
71
72 for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
73 if (setenv(*argv, ++p, 1) == -1) {
74 /* reuse 126, it matches the problem most */
75 exit(126);
76 }
77
78 if (*argv) {
79 /*
80 * return 127 if the command to be run could not be
81 * found; 126 if the command was found but could
82 * not be invoked
83 */
84 execvp(*argv, argv);
85 err((errno == ENOENT) ? 127 : 126, "%s", *argv);
86 /* NOTREACHED */
87 }
88
89 for (ep = environ; *ep; ep++)
90 (void)printf("%s\n", *ep);
91
92 exit(0);
93 }
94
95 void
usage(void)96 usage(void)
97 {
98 (void)fprintf(stderr, "usage: env [-i] [name=value ...] "
99 "[utility [argument ...]]\n");
100 exit (1);
101 }
102