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 <andersen@codepoet.org> (C) 2003
38 * - corretion "-" option usage
39 * - multiple "-u unsetenv" support
40 * - GNU long option support
41 * - save errno after exec failed before bb_perror_msg()
54 static const struct option env_long_options[] = {
55 { "ignore-environment", 0, NULL, 'i' },
56 { "unset", 1, NULL, 'u' },
60 extern int env_main(int argc, char** argv)
63 char *cleanenv[1] = { NULL };
66 extern char **environ;
68 bb_opt_complementaly = "u*";
69 bb_applet_long_options = env_long_options;
71 opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
74 if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
83 unsetenv(unset_env->data);
84 unset_env = unset_env->link;
88 while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
89 if (putenv(*argv) < 0) {
90 bb_perror_msg_and_die("putenv");
100 bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */
101 return (er == ENOENT) ? 127 : 126; /* SUSv3-mandated exit codes. */
104 for (ep = environ; *ep; ep++) {
108 bb_fflush_stdout_and_exit(0);
112 * Copyright (c) 1988, 1993, 1994
113 * The Regents of the University of California. All rights reserved.
115 * Redistribution and use in source and binary forms, with or without
116 * modification, are permitted provided that the following conditions
118 * 1. Redistributions of source code must retain the above copyright
119 * notice, this list of conditions and the following disclaimer.
120 * 2. Redistributions in binary form must reproduce the above copyright
121 * notice, this list of conditions and the following disclaimer in the
122 * documentation and/or other materials provided with the distribution.
124 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
125 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
127 * 4. Neither the name of the University nor the names of its contributors
128 * may be used to endorse or promote products derived from this software
129 * without specific prior written permission.
131 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
132 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
133 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
134 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
135 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
136 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
137 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
138 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
139 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
140 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF