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 source tree.
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 /* This is a NOEXEC applet. Be very careful! */
36 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
37 static const char env_longopts
[] ALIGN1
=
38 "ignore-environment\0" No_argument
"i"
39 "unset\0" Required_argument
"u"
43 int env_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
44 int env_main(int argc UNUSED_PARAM
, char **argv
)
47 llist_t
*unset_env
= NULL
;
49 opt_complementary
= "u::";
50 #if ENABLE_FEATURE_ENV_LONG_OPTIONS
51 applet_long_options
= env_longopts
;
53 opts
= getopt32(argv
, "+iu:", &unset_env
);
55 if (argv
[0] && LONE_DASH(argv
[0])) {
63 char *var
= llist_pop(&unset_env
);
64 /* This does not handle -uVAR=VAL
65 * (coreutils _sets_ the variable in that case): */
67 /* This does, but uses somewhan undocumented feature that
68 * putenv("name_without_equal_sign") unsets the variable: */
72 while (*argv
&& (strchr(*argv
, '=') != NULL
)) {
73 if (putenv(*argv
) < 0) {
74 bb_perror_msg_and_die("putenv");
80 BB_EXECVP_or_die(argv
);
83 if (environ
) { /* clearenv() may set environ == NULL! */
85 for (ep
= environ
; *ep
; ep
++) {
90 fflush_stdout_and_exit(EXIT_SUCCESS
);
94 * Copyright (c) 1988, 1993, 1994
95 * The Regents of the University of California. All rights reserved.
97 * Redistribution and use in source and binary forms, with or without
98 * modification, are permitted provided that the following conditions
100 * 1. Redistributions of source code must retain the above copyright
101 * notice, this list of conditions and the following disclaimer.
102 * 2. Redistributions in binary form must reproduce the above copyright
103 * notice, this list of conditions and the following disclaimer in the
104 * documentation and/or other materials provided with the distribution.
106 * 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change
107 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
109 * 4. Neither the name of the University nor the names of its contributors
110 * may be used to endorse or promote products derived from this software
111 * without specific prior written permission.
113 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
114 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
115 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
116 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
117 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
118 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
119 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
120 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
121 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
122 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF