/* 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); }