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 xfunc_error_retval
32 #include <getopt.h> /* struct option */
35 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
36 static const char env_longopts[] ALIGN1 =
37 "ignore-environment\0" No_argument "i"
38 "unset\0" Required_argument "u"
42 int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
43 int env_main(int argc ATTRIBUTE_UNUSED, char **argv)
45 /* cleanenv was static - why? */
49 llist_t *unset_env = NULL;
51 opt_complementary = "u::";
52 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
53 applet_long_options = env_longopts;
55 opt = getopt32(argv, "+iu:", &unset_env);
57 if (*argv && LONE_DASH(argv[0])) {
66 unsetenv(unset_env->data);
67 unset_env = unset_env->link;
71 while (*argv && (strchr(*argv, '=') != NULL)) {
72 if (putenv(*argv) < 0) {
73 bb_perror_msg_and_die("putenv");
79 BB_EXECVP(*argv, argv);
80 /* SUSv3-mandated exit codes. */
81 xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
82 bb_simple_perror_msg_and_die(*argv);
85 for (ep = environ; *ep; ep++) {
89 fflush_stdout_and_exit(0);
93 * Copyright (c) 1988, 1993, 1994
94 * The Regents of the University of California. All rights reserved.
96 * Redistribution and use in source and binary forms, with or without
97 * modification, are permitted provided that the following conditions
99 * 1. Redistributions of source code must retain the above copyright
100 * notice, this list of conditions and the following disclaimer.
101 * 2. Redistributions in binary form must reproduce the above copyright
102 * notice, this list of conditions and the following disclaimer in the
103 * documentation and/or other materials provided with the distribution.
105 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
106 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
108 * 4. Neither the name of the University nor the names of its contributors
109 * may be used to endorse or promote products derived from this software
110 * without specific prior written permission.
112 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
113 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
114 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
115 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
116 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
117 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
118 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
119 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
120 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
121 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF