blob: 04279f3e00fbf25424c1a34fec533f5cb4e9fc97 [file] [log] [blame]
Eric Andersen84e229c2001-03-29 22:48:33 +00001/* 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"801ab142006-07-12 07:56:04 +00008 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersen84e229c2001-03-29 22:48:33 +00009 *
10 * Original copyright notice is retained at the end of this file.
11 *
Eric Andersencb81e642003-07-14 21:21:08 +000012 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
Eric Andersen84e229c2001-03-29 22:48:33 +000013 */
14
Manuel Novoa III cad53642003-03-19 09:13:01 +000015/* 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 Andersen05df91a2003-07-28 07:42:19 +000024/*
Eric Andersen7ff33f12004-04-16 15:02:10 +000025 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
Eric Andersenaff114c2004-04-14 17:51:38 +000026 * - correct "-" option usage
Eric Andersen05df91a2003-07-28 07:42:19 +000027 * - multiple "-u unsetenv" support
28 * - GNU long option support
Denis Vlasenko40920822006-10-03 20:28:06 +000029 * - use xfunc_error_retval
Eric Andersen05df91a2003-07-28 07:42:19 +000030 */
31
Eric Andersen84e229c2001-03-29 22:48:33 +000032#include "busybox.h"
Bernhard Reutner-Fischerd591a362006-08-20 17:35:13 +000033#include <errno.h>
34#include <getopt.h> /* struct option */
Eric Andersen84e229c2001-03-29 22:48:33 +000035
Bernhard Reutner-Fischer01d23ad2006-05-26 20:19:22 +000036#if ENABLE_FEATURE_ENV_LONG_OPTIONS
Eric Andersen05df91a2003-07-28 07:42:19 +000037static 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-Fischer01d23ad2006-05-26 20:19:22 +000042#endif
Eric Andersen05df91a2003-07-28 07:42:19 +000043
Denis Vlasenko06af2162007-02-03 17:28:39 +000044int env_main(int argc, char** argv);
Rob Landleydfba7412006-03-06 20:47:33 +000045int env_main(int argc, char** argv)
Eric Andersen84e229c2001-03-29 22:48:33 +000046{
Rob Landley0a7c8ef2006-02-22 17:01:00 +000047 static char *cleanenv[1] = { NULL };
48
Bernhard Reutner-Fischerd591a362006-08-20 17:35:13 +000049 char **ep;
Denis Vlasenko67b23e62006-10-03 21:00:06 +000050 unsigned opt;
Eric Andersen1b1942f2003-11-07 11:20:21 +000051 llist_t *unset_env = NULL;
Eric Andersen05df91a2003-07-28 07:42:19 +000052 extern char **environ;
Eric Andersen84e229c2001-03-29 22:48:33 +000053
Denis Vlasenko67b23e62006-10-03 21:00:06 +000054 opt_complementary = "u::";
Bernhard Reutner-Fischer01d23ad2006-05-26 20:19:22 +000055#if ENABLE_FEATURE_ENV_LONG_OPTIONS
Denis Vlasenko67b23e62006-10-03 21:00:06 +000056 applet_long_options = env_long_options;
Bernhard Reutner-Fischer01d23ad2006-05-26 20:19:22 +000057#endif
Eric Andersen05df91a2003-07-28 07:42:19 +000058
Denis Vlasenko67b23e62006-10-03 21:00:06 +000059 opt = getopt32(argc, argv, "+iu:", &unset_env);
Manuel Novoa III cad53642003-03-19 09:13:01 +000060
61 argv += optind;
Denis Vlasenko9f739442006-12-16 23:49:13 +000062 if (*argv && LONE_DASH(argv[0])) {
Eric Andersen05df91a2003-07-28 07:42:19 +000063 opt |= 1;
Manuel Novoa III cad53642003-03-19 09:13:01 +000064 ++argv;
Matt Kraai5b44f482001-05-11 14:26:29 +000065 }
Manuel Novoa III cad53642003-03-19 09:13:01 +000066
Denis Vlasenkofe544582006-10-03 15:57:40 +000067 if (opt & 1)
Eric Andersen05df91a2003-07-28 07:42:19 +000068 environ = cleanenv;
Denis Vlasenkofe544582006-10-03 15:57:40 +000069 else if (opt & 2) {
70 while (unset_env) {
Eric Andersen05df91a2003-07-28 07:42:19 +000071 unsetenv(unset_env->data);
72 unset_env = unset_env->link;
73 }
74 }
75
Bernhard Reutner-Fischerd591a362006-08-20 17:35:13 +000076 while (*argv && (strchr(*argv, '=') != NULL)) {
Manuel Novoa III cad53642003-03-19 09:13:01 +000077 if (putenv(*argv) < 0) {
78 bb_perror_msg_and_die("putenv");
79 }
80 ++argv;
81 }
82
Eric Andersen84e229c2001-03-29 22:48:33 +000083 if (*argv) {
84 execvp(*argv, argv);
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +000085 /* SUSv3-mandated exit codes. */
Denis Vlasenko40920822006-10-03 20:28:06 +000086 xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +000087 bb_perror_msg_and_die("%s", *argv);
Eric Andersen84e229c2001-03-29 22:48:33 +000088 }
Manuel Novoa III cad53642003-03-19 09:13:01 +000089
90 for (ep = environ; *ep; ep++) {
Matt Kraai59df6f72001-05-16 14:21:09 +000091 puts(*ep);
Manuel Novoa III cad53642003-03-19 09:13:01 +000092 }
93
Denis Vlasenkof0ed3762006-10-26 23:21:47 +000094 fflush_stdout_and_exit(0);
Eric Andersen84e229c2001-03-29 22:48:33 +000095}
96
97/*
98 * Copyright (c) 1988, 1993, 1994
Eric Andersen05df91a2003-07-28 07:42:19 +000099 * The Regents of the University of California. All rights reserved.
Eric Andersen84e229c2001-03-29 22:48:33 +0000100 *
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 Andersen05df91a2003-07-28 07:42:19 +0000110 * 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 Andersen84e229c2001-03-29 22:48:33 +0000112 *
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