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