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 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Original copyright notice is retained at the end of this file.
24 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
27 /* BB_AUDIT SUSv3 compliant */
28 /* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
30 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
32 * Fixed bug involving exit return codes if execvp fails. Also added
33 * output error checking.
37 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
38 * - correct "-" option usage
39 * - multiple "-u unsetenv" support
40 * - GNU long option support
41 * - use bb_default_error_retval
50 #include <getopt.h> /* struct option */
54 static const struct option env_long_options[] = {
55 { "ignore-environment", 0, NULL, 'i' },
56 { "unset", 1, NULL, 'u' },
60 int env_main(int argc, char** argv)
62 static char *cleanenv[1] = { NULL };
66 llist_t *unset_env = NULL;
67 extern char **environ;
69 bb_opt_complementally = "u::";
70 bb_applet_long_options = env_long_options;
72 opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
75 if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
84 unsetenv(unset_env->data);
85 unset_env = unset_env->link;
89 while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
90 if (putenv(*argv) < 0) {
91 bb_perror_msg_and_die("putenv");
98 /* SUSv3-mandated exit codes. */
99 bb_default_error_retval = (errno == ENOENT) ? 127 : 126;
100 bb_perror_msg_and_die("%s", *argv);
103 for (ep = environ; *ep; ep++) {
107 bb_fflush_stdout_and_exit(0);
111 * Copyright (c) 1988, 1993, 1994
112 * The Regents of the University of California. All rights reserved.
114 * Redistribution and use in source and binary forms, with or without
115 * modification, are permitted provided that the following conditions
117 * 1. Redistributions of source code must retain the above copyright
118 * notice, this list of conditions and the following disclaimer.
119 * 2. Redistributions in binary form must reproduce the above copyright
120 * notice, this list of conditions and the following disclaimer in the
121 * documentation and/or other materials provided with the distribution.
123 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
124 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
126 * 4. Neither the name of the University nor the names of its contributors
127 * may be used to endorse or promote products derived from this software
128 * without specific prior written permission.
130 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
131 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
132 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
133 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
134 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
135 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
136 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
137 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
138 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
139 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF