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135 lines
3.8 KiB
C
135 lines
3.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* env implementation for busybox
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*
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* Copyright (c) 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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* Original copyright notice is retained at the end of this file.
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*
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* Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Fixed bug involving exit return codes if execvp fails. Also added
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* output error checking.
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*/
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/*
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* Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
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* - correct "-" option usage
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* - multiple "-u unsetenv" support
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* - GNU long option support
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* - use bb_default_error_retval
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <getopt.h> /* struct option */
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#include "busybox.h"
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#if ENABLE_FEATURE_ENV_LONG_OPTIONS
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static const struct option env_long_options[] = {
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{ "ignore-environment", 0, NULL, 'i' },
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{ "unset", 1, NULL, 'u' },
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{ 0, 0, 0, 0 }
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};
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#endif
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int env_main(int argc, char** argv)
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{
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static char *cleanenv[1] = { NULL };
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char **ep, *p;
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unsigned long opt;
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llist_t *unset_env = NULL;
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extern char **environ;
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bb_opt_complementally = "u::";
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#if ENABLE_FEATURE_ENV_LONG_OPTIONS
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bb_applet_long_options = env_long_options;
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#endif
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opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
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argv += optind;
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if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
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opt |= 1;
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++argv;
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}
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if(opt & 1)
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environ = cleanenv;
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else if(opt & 2) {
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while(unset_env) {
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unsetenv(unset_env->data);
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unset_env = unset_env->link;
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}
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}
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while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
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if (putenv(*argv) < 0) {
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bb_perror_msg_and_die("putenv");
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}
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++argv;
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}
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if (*argv) {
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execvp(*argv, argv);
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/* SUSv3-mandated exit codes. */
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bb_default_error_retval = (errno == ENOENT) ? 127 : 126;
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bb_perror_msg_and_die("%s", *argv);
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}
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for (ep = environ; *ep; ep++) {
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puts(*ep);
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}
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bb_fflush_stdout_and_exit(0);
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}
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/*
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* Copyright (c) 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
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* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
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*
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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