source: branches/2.2.2/mindi-busybox/coreutils/env.c @ 1247

Last change on this file since 1247 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 4.5 KB
Line 
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 *
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.
12 *
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.
17 *
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
21 *
22 * Original copyright notice is retained at the end of this file.
23 *
24 * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
25 */
26
27/* BB_AUDIT SUSv3 compliant */
28/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
29
30/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
31 *
32 * Fixed bug involving exit return codes if execvp fails.  Also added
33 * output error checking.
34 */
35
36/*
37 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
38 * - correct "-" option usage
39 * - multiple "-u unsetenv" support
40 * - GNU long option support
41 * - use bb_default_error_retval
42 */
43
44
45#include <stdio.h>
46#include <string.h>
47#include <stdlib.h>
48#include <errno.h>
49#include <unistd.h>
50#include <getopt.h> /* struct option */
51#include "busybox.h"
52
53#if ENABLE_FEATURE_ENV_LONG_OPTIONS
54static const struct option env_long_options[] = {
55    { "ignore-environment", 0, NULL, 'i' },
56    { "unset", 1, NULL, 'u' },
57    { 0, 0, 0, 0 }
58};
59#endif
60
61int env_main(int argc, char** argv)
62{
63    static char *cleanenv[1] = { NULL };
64
65    char **ep, *p;
66    unsigned long opt;
67    llist_t *unset_env = NULL;
68    extern char **environ;
69
70    bb_opt_complementally = "u::";
71#if ENABLE_FEATURE_ENV_LONG_OPTIONS
72    bb_applet_long_options = env_long_options;
73#endif
74
75    opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
76
77    argv += optind;
78    if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
79        opt |= 1;
80        ++argv;
81    }
82
83    if(opt & 1)
84        environ = cleanenv;
85    else if(opt & 2) {
86        while(unset_env) {
87            unsetenv(unset_env->data);
88            unset_env = unset_env->link;
89        }
90    }
91
92    while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
93        if (putenv(*argv) < 0) {
94            bb_perror_msg_and_die("putenv");
95        }
96        ++argv;
97    }
98
99    if (*argv) {
100        execvp(*argv, argv);
101        /* SUSv3-mandated exit codes. */
102        bb_default_error_retval = (errno == ENOENT) ? 127 : 126;
103        bb_perror_msg_and_die("%s", *argv);
104    }
105
106    for (ep = environ; *ep; ep++) {
107        puts(*ep);
108    }
109
110    bb_fflush_stdout_and_exit(0);
111}
112
113/*
114 * Copyright (c) 1988, 1993, 1994
115 *      The Regents of the University of California.  All rights reserved.
116 *
117 * Redistribution and use in source and binary forms, with or without
118 * modification, are permitted provided that the following conditions
119 * are met:
120 * 1. Redistributions of source code must retain the above copyright
121 *    notice, this list of conditions and the following disclaimer.
122 * 2. Redistributions in binary form must reproduce the above copyright
123 *    notice, this list of conditions and the following disclaimer in the
124 *    documentation and/or other materials provided with the distribution.
125 *
126 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
127 *      ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
128 *
129 * 4. Neither the name of the University nor the names of its contributors
130 *    may be used to endorse or promote products derived from this software
131 *    without specific prior written permission.
132 *
133 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
134 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
135 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
136 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
137 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
138 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
139 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
140 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
141 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
142 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
143 * SUCH DAMAGE.
144 */
145
146
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