Contents of /trunk/mkinitrd-magellan/busybox/coreutils/env.c
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 3936 byte(s)
-updated to busybox-1.17.1
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 | /* This is a NOEXEC applet. Be very careful! */ |
33 | |
34 | #include "libbb.h" |
35 | |
36 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS |
37 | static const char env_longopts[] ALIGN1 = |
38 | "ignore-environment\0" No_argument "i" |
39 | "unset\0" Required_argument "u" |
40 | ; |
41 | #endif |
42 | |
43 | int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
44 | int env_main(int argc UNUSED_PARAM, char **argv) |
45 | { |
46 | unsigned opts; |
47 | llist_t *unset_env = NULL; |
48 | |
49 | opt_complementary = "u::"; |
50 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS |
51 | applet_long_options = env_longopts; |
52 | #endif |
53 | opts = getopt32(argv, "+iu:", &unset_env); |
54 | argv += optind; |
55 | if (argv[0] && LONE_DASH(argv[0])) { |
56 | opts |= 1; |
57 | ++argv; |
58 | } |
59 | if (opts & 1) { |
60 | clearenv(); |
61 | } |
62 | while (unset_env) { |
63 | char *var = llist_pop(&unset_env); |
64 | /* This does not handle -uVAR=VAL |
65 | * (coreutils _sets_ the variable in that case): */ |
66 | /*unsetenv(var);*/ |
67 | /* This does, but uses somewhan undocumented feature that |
68 | * putenv("name_without_equal_sign") unsets the variable: */ |
69 | putenv(var); |
70 | } |
71 | |
72 | while (*argv && (strchr(*argv, '=') != NULL)) { |
73 | if (putenv(*argv) < 0) { |
74 | bb_perror_msg_and_die("putenv"); |
75 | } |
76 | ++argv; |
77 | } |
78 | |
79 | if (argv[0]) { |
80 | BB_EXECVP_or_die(argv); |
81 | } |
82 | |
83 | if (environ) { /* clearenv() may set environ == NULL! */ |
84 | char **ep; |
85 | for (ep = environ; *ep; ep++) { |
86 | puts(*ep); |
87 | } |
88 | } |
89 | |
90 | fflush_stdout_and_exit(EXIT_SUCCESS); |
91 | } |
92 | |
93 | /* |
94 | * Copyright (c) 1988, 1993, 1994 |
95 | * The Regents of the University of California. All rights reserved. |
96 | * |
97 | * Redistribution and use in source and binary forms, with or without |
98 | * modification, are permitted provided that the following conditions |
99 | * are met: |
100 | * 1. Redistributions of source code must retain the above copyright |
101 | * notice, this list of conditions and the following disclaimer. |
102 | * 2. Redistributions in binary form must reproduce the above copyright |
103 | * notice, this list of conditions and the following disclaimer in the |
104 | * documentation and/or other materials provided with the distribution. |
105 | * |
106 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change |
107 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> |
108 | * |
109 | * 4. Neither the name of the University nor the names of its contributors |
110 | * may be used to endorse or promote products derived from this software |
111 | * without specific prior written permission. |
112 | * |
113 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
114 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
115 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
116 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
117 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
118 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
119 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
120 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
121 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
122 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
123 | * SUCH DAMAGE. |
124 | */ |