| /* vi: set sw=4 ts=4: */ |
| /* |
| * env implementation for busybox |
| * |
| * Copyright (c) 1988, 1993, 1994 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| * |
| * Original copyright notice is retained at the end of this file. |
| * |
| * Modified for BusyBox by Erik Andersen <andersen@codepoet.org> |
| */ |
| /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
| * |
| * Fixed bug involving exit return codes if execvp fails. Also added |
| * output error checking. |
| */ |
| /* |
| * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003 |
| * - correct "-" option usage |
| * - multiple "-u unsetenv" support |
| * - GNU long option support |
| * - use xfunc_error_retval |
| */ |
| //config:config ENV |
| //config: bool "env (4 kb)" |
| //config: default y |
| //config: help |
| //config: env is used to set an environment variable and run |
| //config: a command; without options it displays the current |
| //config: environment. |
| |
| //applet:IF_ENV(APPLET_NOEXEC(env, env, BB_DIR_USR_BIN, BB_SUID_DROP, env)) |
| |
| //kbuild:lib-$(CONFIG_ENV) += env.o |
| |
| /* BB_AUDIT SUSv3 compliant */ |
| /* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */ |
| |
| //usage:#define env_trivial_usage |
| //usage: "[-i] [-u NAME]... [-] [NAME=VALUE]... [PROG ARGS]" |
| // The "-" can occur only once (unlike, say, -i): it terminates option processing, |
| // so if it is followed by another "-" arg (or any option-looking arg), |
| // that arg will be taken as PROG (or even as NAME=VALUE, example: "-z=QWE"). |
| //usage:#define env_full_usage "\n\n" |
| //usage: "Print current environment or run PROG after setting up environment\n" |
| //usage: "\n -, -i Start with empty environment" |
| //usage: "\n -u NAME Remove variable from environment" |
| |
| #include "libbb.h" |
| |
| int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int env_main(int argc UNUSED_PARAM, char **argv) |
| { |
| unsigned opts; |
| llist_t *unset_env = NULL; |
| |
| opts = getopt32long(argv, "+iu:*", |
| "ignore-environment\0" No_argument "i" |
| "unset\0" Required_argument "u" |
| , &unset_env |
| ); |
| argv += optind; |
| if (argv[0] && LONE_DASH(argv[0])) { |
| opts |= 1; |
| ++argv; |
| } |
| if (opts & 1) { |
| clearenv(); |
| } |
| while (unset_env) { |
| char *var = llist_pop(&unset_env); |
| /* This does not handle -uVAR=VAL |
| * (coreutils _sets_ the variable in that case): */ |
| /*unsetenv(var);*/ |
| /* This does, but uses somewhan undocumented feature that |
| * putenv("name_without_equal_sign") unsets the variable: */ |
| putenv(var); |
| } |
| |
| while (*argv && (strchr(*argv, '=') != NULL)) { |
| if (putenv(*argv) < 0) { |
| bb_simple_perror_msg_and_die("putenv"); |
| } |
| ++argv; |
| } |
| |
| if (argv[0]) { |
| BB_EXECVP_or_die(argv); |
| } |
| |
| if (environ) { /* clearenv() may set environ == NULL! */ |
| char **ep; |
| for (ep = environ; *ep; ep++) { |
| puts(*ep); |
| } |
| } |
| |
| fflush_stdout_and_exit(EXIT_SUCCESS); |
| } |
| |
| /* |
| * Copyright (c) 1988, 1993, 1994 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change |
| * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change |
| * |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |