/* 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> */ /* BB_AUDIT SUSv3 compliant */ /* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */ /* 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 */ /* This is a NOEXEC applet. Be very careful! */ //usage:#define env_trivial_usage //usage: "[-iu] [-] [name=value]... [PROG ARGS]" //usage:#define env_full_usage "\n\n" //usage: "Print the current environment or run PROG after setting up\n" //usage: "the specified environment\n" //usage: "\n -, -i Start with an empty environment" //usage: "\n -u Remove variable from the environment" #include "libbb.h" #if ENABLE_FEATURE_ENV_LONG_OPTIONS static const char env_longopts[] ALIGN1 = "ignore-environment\0" No_argument "i" "unset\0" Required_argument "u" ; #endif 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; opt_complementary = "u::"; #if ENABLE_FEATURE_ENV_LONG_OPTIONS applet_long_options = env_longopts; #endif opts = getopt32(argv, "+iu:", &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_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. */