Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 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 | * |
"Robert P. J. Day" | 801ab14 | 2006-07-12 07:56:04 +0000 | [diff] [blame] | 8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 9 | * |
| 10 | * Original copyright notice is retained at the end of this file. |
| 11 | * |
Eric Andersen | cb81e64 | 2003-07-14 21:21:08 +0000 | [diff] [blame] | 12 | * Modified for BusyBox by Erik Andersen <andersen@codepoet.org> |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 13 | */ |
| 14 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 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 | |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 24 | /* |
Eric Andersen | 7ff33f1 | 2004-04-16 15:02:10 +0000 | [diff] [blame] | 25 | * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003 |
Eric Andersen | aff114c | 2004-04-14 17:51:38 +0000 | [diff] [blame] | 26 | * - correct "-" option usage |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 27 | * - multiple "-u unsetenv" support |
| 28 | * - GNU long option support |
Denis Vlasenko | 4092082 | 2006-10-03 20:28:06 +0000 | [diff] [blame] | 29 | * - use xfunc_error_retval |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 30 | */ |
| 31 | |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 32 | #include "busybox.h" |
Bernhard Reutner-Fischer | d591a36 | 2006-08-20 17:35:13 +0000 | [diff] [blame] | 33 | #include <errno.h> |
| 34 | #include <getopt.h> /* struct option */ |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 35 | |
Bernhard Reutner-Fischer | 01d23ad | 2006-05-26 20:19:22 +0000 | [diff] [blame] | 36 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 37 | static const struct option env_long_options[] = { |
| 38 | { "ignore-environment", 0, NULL, 'i' }, |
| 39 | { "unset", 1, NULL, 'u' }, |
| 40 | { 0, 0, 0, 0 } |
| 41 | }; |
Bernhard Reutner-Fischer | 01d23ad | 2006-05-26 20:19:22 +0000 | [diff] [blame] | 42 | #endif |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 43 | |
Denis Vlasenko | 06af216 | 2007-02-03 17:28:39 +0000 | [diff] [blame^] | 44 | int env_main(int argc, char** argv); |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 45 | int env_main(int argc, char** argv) |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 46 | { |
Rob Landley | 0a7c8ef | 2006-02-22 17:01:00 +0000 | [diff] [blame] | 47 | static char *cleanenv[1] = { NULL }; |
| 48 | |
Bernhard Reutner-Fischer | d591a36 | 2006-08-20 17:35:13 +0000 | [diff] [blame] | 49 | char **ep; |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 50 | unsigned opt; |
Eric Andersen | 1b1942f | 2003-11-07 11:20:21 +0000 | [diff] [blame] | 51 | llist_t *unset_env = NULL; |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 52 | extern char **environ; |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 53 | |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 54 | opt_complementary = "u::"; |
Bernhard Reutner-Fischer | 01d23ad | 2006-05-26 20:19:22 +0000 | [diff] [blame] | 55 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 56 | applet_long_options = env_long_options; |
Bernhard Reutner-Fischer | 01d23ad | 2006-05-26 20:19:22 +0000 | [diff] [blame] | 57 | #endif |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 58 | |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 59 | opt = getopt32(argc, argv, "+iu:", &unset_env); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 60 | |
| 61 | argv += optind; |
Denis Vlasenko | 9f73944 | 2006-12-16 23:49:13 +0000 | [diff] [blame] | 62 | if (*argv && LONE_DASH(argv[0])) { |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 63 | opt |= 1; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 64 | ++argv; |
Matt Kraai | 5b44f48 | 2001-05-11 14:26:29 +0000 | [diff] [blame] | 65 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 66 | |
Denis Vlasenko | fe54458 | 2006-10-03 15:57:40 +0000 | [diff] [blame] | 67 | if (opt & 1) |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 68 | environ = cleanenv; |
Denis Vlasenko | fe54458 | 2006-10-03 15:57:40 +0000 | [diff] [blame] | 69 | else if (opt & 2) { |
| 70 | while (unset_env) { |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 71 | unsetenv(unset_env->data); |
| 72 | unset_env = unset_env->link; |
| 73 | } |
| 74 | } |
| 75 | |
Bernhard Reutner-Fischer | d591a36 | 2006-08-20 17:35:13 +0000 | [diff] [blame] | 76 | while (*argv && (strchr(*argv, '=') != NULL)) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 77 | if (putenv(*argv) < 0) { |
| 78 | bb_perror_msg_and_die("putenv"); |
| 79 | } |
| 80 | ++argv; |
| 81 | } |
| 82 | |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 83 | if (*argv) { |
| 84 | execvp(*argv, argv); |
"Vladimir N. Oleynik" | f704b27 | 2005-10-14 09:56:52 +0000 | [diff] [blame] | 85 | /* SUSv3-mandated exit codes. */ |
Denis Vlasenko | 4092082 | 2006-10-03 20:28:06 +0000 | [diff] [blame] | 86 | xfunc_error_retval = (errno == ENOENT) ? 127 : 126; |
"Vladimir N. Oleynik" | f704b27 | 2005-10-14 09:56:52 +0000 | [diff] [blame] | 87 | bb_perror_msg_and_die("%s", *argv); |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 88 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 89 | |
| 90 | for (ep = environ; *ep; ep++) { |
Matt Kraai | 59df6f7 | 2001-05-16 14:21:09 +0000 | [diff] [blame] | 91 | puts(*ep); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 92 | } |
| 93 | |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 94 | fflush_stdout_and_exit(0); |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Copyright (c) 1988, 1993, 1994 |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 99 | * The Regents of the University of California. All rights reserved. |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 100 | * |
| 101 | * Redistribution and use in source and binary forms, with or without |
| 102 | * modification, are permitted provided that the following conditions |
| 103 | * are met: |
| 104 | * 1. Redistributions of source code must retain the above copyright |
| 105 | * notice, this list of conditions and the following disclaimer. |
| 106 | * 2. Redistributions in binary form must reproduce the above copyright |
| 107 | * notice, this list of conditions and the following disclaimer in the |
| 108 | * documentation and/or other materials provided with the distribution. |
| 109 | * |
Eric Andersen | 05df91a | 2003-07-28 07:42:19 +0000 | [diff] [blame] | 110 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change |
| 111 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> |
Eric Andersen | 84e229c | 2001-03-29 22:48:33 +0000 | [diff] [blame] | 112 | * |
| 113 | * 4. Neither the name of the University nor the names of its contributors |
| 114 | * may be used to endorse or promote products derived from this software |
| 115 | * without specific prior written permission. |
| 116 | * |
| 117 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 118 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 119 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 120 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 121 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 122 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 123 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 124 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 125 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 126 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 127 | * SUCH DAMAGE. |
| 128 | */ |
| 129 | |
| 130 | |