1 /* vi: set sw=4 ts=4: */
3 * env implementation for busybox
5 * Copyright (c) 1988, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 * Original copyright notice is retained at the end of this file.
12 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
15 /* BB_AUDIT SUSv3 compliant */
16 /* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
18 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
20 * Fixed bug involving exit return codes if execvp fails. Also added
21 * output error checking.
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 bb_default_error_retval
38 #include <getopt.h> /* struct option */
41 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
42 static const struct option env_long_options[] = {
43 { "ignore-environment", 0, NULL, 'i' },
44 { "unset", 1, NULL, 'u' },
49 int env_main(int argc, char** argv)
51 static char *cleanenv[1] = { NULL };
55 llist_t *unset_env = NULL;
56 extern char **environ;
58 bb_opt_complementally = "u::";
59 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
60 bb_applet_long_options = env_long_options;
63 opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
66 if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
75 unsetenv(unset_env->data);
76 unset_env = unset_env->link;
80 while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
81 if (putenv(*argv) < 0) {
82 bb_perror_msg_and_die("putenv");
89 /* SUSv3-mandated exit codes. */
90 bb_default_error_retval = (errno == ENOENT) ? 127 : 126;
91 bb_perror_msg_and_die("%s", *argv);
94 for (ep = environ; *ep; ep++) {
98 bb_fflush_stdout_and_exit(0);
102 * Copyright (c) 1988, 1993, 1994
103 * The Regents of the University of California. All rights reserved.
105 * Redistribution and use in source and binary forms, with or without
106 * modification, are permitted provided that the following conditions
108 * 1. Redistributions of source code must retain the above copyright
109 * notice, this list of conditions and the following disclaimer.
110 * 2. Redistributions in binary form must reproduce the above copyright
111 * notice, this list of conditions and the following disclaimer in the
112 * documentation and/or other materials provided with the distribution.
114 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
115 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
117 * 4. Neither the name of the University nor the names of its contributors
118 * may be used to endorse or promote products derived from this software
119 * without specific prior written permission.
121 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
122 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
123 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
124 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
125 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
126 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
127 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
128 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
129 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
130 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF