| /* vi: set sw=4 ts=4: */ |
| /* |
| * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com> |
| * 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. Neither the name of Julianne F. Haugh 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 JULIE HAUGH 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 JULIE HAUGH 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. |
| */ |
| |
| #include "libbb.h" |
| #if ENABLE_SELINUX |
| #include <selinux/selinux.h> /* for setexeccon */ |
| #endif |
| |
| #if ENABLE_SELINUX |
| static security_context_t current_sid; |
| |
| void FAST_FUNC renew_current_security_context(void) |
| { |
| freecon(current_sid); /* Release old context */ |
| getcon(¤t_sid); /* update */ |
| } |
| void FAST_FUNC set_current_security_context(security_context_t sid) |
| { |
| freecon(current_sid); /* Release old context */ |
| current_sid = sid; |
| } |
| |
| #endif |
| |
| /* Run SHELL, or DEFAULT_SHELL if SHELL is empty. |
| If COMMAND is nonzero, pass it to the shell with the -c option. |
| If ADDITIONAL_ARGS is nonzero, pass it to the shell as more |
| arguments. */ |
| |
| void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) |
| { |
| const char **args; |
| int argno = 1; |
| int additional_args_cnt = 0; |
| |
| for (args = additional_args; args && *args; args++) |
| additional_args_cnt++; |
| |
| args = xmalloc(sizeof(char*) * (4 + additional_args_cnt)); |
| |
| args[0] = bb_get_last_path_component_nostrip(xstrdup(shell)); |
| |
| if (loginshell) |
| args[0] = xasprintf("-%s", args[0]); |
| |
| if (command) { |
| args[argno++] = "-c"; |
| args[argno++] = command; |
| } |
| if (additional_args) { |
| for (; *additional_args; ++additional_args) |
| args[argno++] = *additional_args; |
| } |
| args[argno] = NULL; |
| #if ENABLE_SELINUX |
| if (current_sid) |
| setexeccon(current_sid); |
| if (ENABLE_FEATURE_CLEAN_UP) |
| freecon(current_sid); |
| #endif |
| execv(shell, (char **) args); |
| bb_perror_msg_and_die("cannot run %s", shell); |
| } |