[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * env implementation for busybox
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| 4 | *
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| 5 | * Copyright (c) 1988, 1993, 1994
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| 6 | * The Regents of the University of California. All rights reserved.
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| 7 | *
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| 8 | * This program is free software; you can redistribute it and/or modify
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| 9 | * it under the terms of the GNU General Public License as published by
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| 10 | * the Free Software Foundation; either version 2 of the License, or
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| 11 | * (at your option) any later version.
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| 12 | *
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| 13 | * This program is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 16 | * General Public License for more details.
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| 17 | *
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| 18 | * You should have received a copy of the GNU General Public License
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| 19 | * along with this program; if not, write to the Free Software
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| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 21 | *
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| 22 | * Original copyright notice is retained at the end of this file.
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| 23 | *
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| 24 | * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
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| 25 | */
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| 26 |
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| 27 | /* BB_AUDIT SUSv3 compliant */
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| 28 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
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| 29 |
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| 30 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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| 31 | *
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| 32 | * Fixed bug involving exit return codes if execvp fails. Also added
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| 33 | * output error checking.
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| 34 | */
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| 35 |
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| 36 | /*
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| 37 | * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
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| 38 | * - correct "-" option usage
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| 39 | * - multiple "-u unsetenv" support
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| 40 | * - GNU long option support
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| 41 | * - use bb_default_error_retval
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| 42 | */
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| 43 |
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| 44 |
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| 45 | #include <stdio.h>
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| 46 | #include <string.h>
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| 47 | #include <stdlib.h>
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| 48 | #include <errno.h>
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| 49 | #include <unistd.h>
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| 50 | #include <getopt.h> /* struct option */
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| 51 | #include "busybox.h"
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| 52 |
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| 53 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS
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| 54 | static const struct option env_long_options[] = {
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| 55 | { "ignore-environment", 0, NULL, 'i' },
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| 56 | { "unset", 1, NULL, 'u' },
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| 57 | { 0, 0, 0, 0 }
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| 58 | };
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| 59 | #endif
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| 60 |
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| 61 | int env_main(int argc, char** argv)
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| 62 | {
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| 63 | static char *cleanenv[1] = { NULL };
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| 64 |
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| 65 | char **ep, *p;
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| 66 | unsigned long opt;
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| 67 | llist_t *unset_env = NULL;
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| 68 | extern char **environ;
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| 69 |
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| 70 | bb_opt_complementally = "u::";
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| 71 | #if ENABLE_FEATURE_ENV_LONG_OPTIONS
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| 72 | bb_applet_long_options = env_long_options;
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| 73 | #endif
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| 74 |
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| 75 | opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
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| 76 |
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| 77 | argv += optind;
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| 78 | if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
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| 79 | opt |= 1;
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| 80 | ++argv;
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| 81 | }
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| 82 |
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| 83 | if(opt & 1)
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| 84 | environ = cleanenv;
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| 85 | else if(opt & 2) {
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| 86 | while(unset_env) {
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| 87 | unsetenv(unset_env->data);
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| 88 | unset_env = unset_env->link;
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| 89 | }
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| 90 | }
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| 91 |
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| 92 | while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
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| 93 | if (putenv(*argv) < 0) {
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| 94 | bb_perror_msg_and_die("putenv");
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| 95 | }
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| 96 | ++argv;
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| 97 | }
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| 98 |
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| 99 | if (*argv) {
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| 100 | execvp(*argv, argv);
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| 101 | /* SUSv3-mandated exit codes. */
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| 102 | bb_default_error_retval = (errno == ENOENT) ? 127 : 126;
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| 103 | bb_perror_msg_and_die("%s", *argv);
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| 104 | }
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| 105 |
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| 106 | for (ep = environ; *ep; ep++) {
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| 107 | puts(*ep);
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| 108 | }
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| 109 |
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| 110 | bb_fflush_stdout_and_exit(0);
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| 111 | }
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| 112 |
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| 113 | /*
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| 114 | * Copyright (c) 1988, 1993, 1994
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| 115 | * The Regents of the University of California. All rights reserved.
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| 116 | *
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| 117 | * Redistribution and use in source and binary forms, with or without
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| 118 | * modification, are permitted provided that the following conditions
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| 119 | * are met:
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| 120 | * 1. Redistributions of source code must retain the above copyright
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| 121 | * notice, this list of conditions and the following disclaimer.
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| 122 | * 2. Redistributions in binary form must reproduce the above copyright
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| 123 | * notice, this list of conditions and the following disclaimer in the
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| 124 | * documentation and/or other materials provided with the distribution.
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| 125 | *
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| 126 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
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| 127 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
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| 128 | *
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| 129 | * 4. Neither the name of the University nor the names of its contributors
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| 130 | * may be used to endorse or promote products derived from this software
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| 131 | * without specific prior written permission.
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| 132 | *
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| 133 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 134 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 135 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 136 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 137 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 138 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 139 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 140 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 141 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 142 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 143 | * SUCH DAMAGE.
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| 144 | */
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| 145 |
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| 146 |
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