1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * env implementation for busybox
|
---|
4 | *
|
---|
5 | * Copyright (c) 1988, 1993, 1994
|
---|
6 | * The Regents of the University of California. All rights reserved.
|
---|
7 | *
|
---|
8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
9 | *
|
---|
10 | * Original copyright notice is retained at the end of this file.
|
---|
11 | *
|
---|
12 | * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
|
---|
13 | */
|
---|
14 |
|
---|
15 | /* BB_AUDIT SUSv3 compliant */
|
---|
16 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
|
---|
17 |
|
---|
18 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
|
---|
19 | *
|
---|
20 | * Fixed bug involving exit return codes if execvp fails. Also added
|
---|
21 | * output error checking.
|
---|
22 | */
|
---|
23 |
|
---|
24 | /*
|
---|
25 | * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
|
---|
26 | * - correct "-" option usage
|
---|
27 | * - multiple "-u unsetenv" support
|
---|
28 | * - GNU long option support
|
---|
29 | * - use xfunc_error_retval
|
---|
30 | */
|
---|
31 |
|
---|
32 | #include <getopt.h> /* struct option */
|
---|
33 | extern char **environ;
|
---|
34 |
|
---|
35 | #include "libbb.h"
|
---|
36 |
|
---|
37 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS
|
---|
38 | static const char env_longopts[] ALIGN1 =
|
---|
39 | "ignore-environment\0" No_argument "i"
|
---|
40 | "unset\0" Required_argument "u"
|
---|
41 | ;
|
---|
42 | #endif
|
---|
43 |
|
---|
44 | int env_main(int argc, char** argv);
|
---|
45 | int env_main(int argc, char** argv)
|
---|
46 | {
|
---|
47 | /* cleanenv was static - why? */
|
---|
48 | char *cleanenv[1];
|
---|
49 | char **ep;
|
---|
50 | unsigned opt;
|
---|
51 | llist_t *unset_env = NULL;
|
---|
52 |
|
---|
53 | opt_complementary = "u::";
|
---|
54 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS
|
---|
55 | applet_long_options = env_longopts;
|
---|
56 | #endif
|
---|
57 | opt = getopt32(argv, "+iu:", &unset_env);
|
---|
58 | argv += optind;
|
---|
59 | if (*argv && LONE_DASH(argv[0])) {
|
---|
60 | opt |= 1;
|
---|
61 | ++argv;
|
---|
62 | }
|
---|
63 | if (opt & 1) {
|
---|
64 | cleanenv[0] = NULL;
|
---|
65 | environ = cleanenv;
|
---|
66 | } else {
|
---|
67 | while (unset_env) {
|
---|
68 | unsetenv(unset_env->data);
|
---|
69 | unset_env = unset_env->link;
|
---|
70 | }
|
---|
71 | }
|
---|
72 |
|
---|
73 | while (*argv && (strchr(*argv, '=') != NULL)) {
|
---|
74 | if (putenv(*argv) < 0) {
|
---|
75 | bb_perror_msg_and_die("putenv");
|
---|
76 | }
|
---|
77 | ++argv;
|
---|
78 | }
|
---|
79 |
|
---|
80 | if (*argv) {
|
---|
81 | BB_EXECVP(*argv, argv);
|
---|
82 | /* SUSv3-mandated exit codes. */
|
---|
83 | xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
|
---|
84 | bb_perror_msg_and_die("%s", *argv);
|
---|
85 | }
|
---|
86 |
|
---|
87 | for (ep = environ; *ep; ep++) {
|
---|
88 | puts(*ep);
|
---|
89 | }
|
---|
90 |
|
---|
91 | fflush_stdout_and_exit(0);
|
---|
92 | }
|
---|
93 |
|
---|
94 | /*
|
---|
95 | * Copyright (c) 1988, 1993, 1994
|
---|
96 | * The Regents of the University of California. All rights reserved.
|
---|
97 | *
|
---|
98 | * Redistribution and use in source and binary forms, with or without
|
---|
99 | * modification, are permitted provided that the following conditions
|
---|
100 | * are met:
|
---|
101 | * 1. Redistributions of source code must retain the above copyright
|
---|
102 | * notice, this list of conditions and the following disclaimer.
|
---|
103 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
104 | * notice, this list of conditions and the following disclaimer in the
|
---|
105 | * documentation and/or other materials provided with the distribution.
|
---|
106 | *
|
---|
107 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
|
---|
108 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
|
---|
109 | *
|
---|
110 | * 4. Neither the name of the University nor the names of its contributors
|
---|
111 | * may be used to endorse or promote products derived from this software
|
---|
112 | * without specific prior written permission.
|
---|
113 | *
|
---|
114 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
---|
115 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
116 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
117 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
---|
118 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
119 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
120 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
121 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
122 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
123 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
124 | * SUCH DAMAGE.
|
---|
125 | */
|
---|
126 |
|
---|
127 |
|
---|