source: MondoRescue/branches/2.2.5/mindi-busybox/coreutils/env.c@ 3528

Last change on this file since 3528 was 1765, checked in by Bruno Cornec, 17 years ago

Update to busybox 1.7.2

File size: 3.7 KB
RevLine 
[821]1/* vi: set sw=4 ts=4: */
2/*
3 * env implementation for busybox
4 *
5 * Copyright (c) 1988, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
[1765]8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
[821]9 *
10 * Original copyright notice is retained at the end of this file.
11 *
12 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
13 */
14
15/* BB_AUDIT SUSv3 compliant */
16/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
17
18/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
19 *
20 * Fixed bug involving exit return codes if execvp fails. Also added
21 * output error checking.
22 */
23
24/*
25 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
26 * - correct "-" option usage
27 * - multiple "-u unsetenv" support
28 * - GNU long option support
[1765]29 * - use xfunc_error_retval
[821]30 */
31
32#include <getopt.h> /* struct option */
[1765]33extern char **environ;
[821]34
[1765]35#include "libbb.h"
36
[821]37#if ENABLE_FEATURE_ENV_LONG_OPTIONS
[1765]38static const char env_longopts[] ALIGN1 =
39 "ignore-environment\0" No_argument "i"
40 "unset\0" Required_argument "u"
41 ;
[821]42#endif
43
[1765]44int env_main(int argc, char** argv);
[821]45int env_main(int argc, char** argv)
46{
[1765]47 /* cleanenv was static - why? */
48 char *cleanenv[1];
49 char **ep;
50 unsigned opt;
[821]51 llist_t *unset_env = NULL;
52
[1765]53 opt_complementary = "u::";
[821]54#if ENABLE_FEATURE_ENV_LONG_OPTIONS
[1765]55 applet_long_options = env_longopts;
[821]56#endif
[1765]57 opt = getopt32(argv, "+iu:", &unset_env);
[821]58 argv += optind;
[1765]59 if (*argv && LONE_DASH(argv[0])) {
[821]60 opt |= 1;
61 ++argv;
62 }
[1765]63 if (opt & 1) {
64 cleanenv[0] = NULL;
[821]65 environ = cleanenv;
[1765]66 } else {
67 while (unset_env) {
[821]68 unsetenv(unset_env->data);
69 unset_env = unset_env->link;
70 }
71 }
72
[1765]73 while (*argv && (strchr(*argv, '=') != NULL)) {
[821]74 if (putenv(*argv) < 0) {
75 bb_perror_msg_and_die("putenv");
76 }
77 ++argv;
78 }
79
80 if (*argv) {
[1765]81 BB_EXECVP(*argv, argv);
[821]82 /* SUSv3-mandated exit codes. */
[1765]83 xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
[821]84 bb_perror_msg_and_die("%s", *argv);
85 }
86
87 for (ep = environ; *ep; ep++) {
88 puts(*ep);
89 }
90
[1765]91 fflush_stdout_and_exit(0);
[821]92}
93
94/*
95 * Copyright (c) 1988, 1993, 1994
96 * The Regents of the University of California. All rights reserved.
97 *
98 * Redistribution and use in source and binary forms, with or without
99 * modification, are permitted provided that the following conditions
100 * are met:
101 * 1. Redistributions of source code must retain the above copyright
102 * notice, this list of conditions and the following disclaimer.
103 * 2. Redistributions in binary form must reproduce the above copyright
104 * notice, this list of conditions and the following disclaimer in the
105 * documentation and/or other materials provided with the distribution.
106 *
107 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
108 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
109 *
110 * 4. Neither the name of the University nor the names of its contributors
111 * may be used to endorse or promote products derived from this software
112 * without specific prior written permission.
113 *
114 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
115 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
116 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
117 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
118 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
119 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
120 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
121 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
122 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
123 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
124 * SUCH DAMAGE.
125 */
126
127
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