blob: de7b92ab2c1447dd852dcfdc50a9523ea3fdecc7 [file] [log] [blame]
Eric Andersen27f64e12002-06-23 04:24:25 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
Eric Andersen27f64e12002-06-23 04:24:25 +000031#include "libbb.h"
Denis Vlasenkofad2b862007-05-31 22:16:38 +000032#if ENABLE_SELINUX
Rob Landley60158cb2005-05-03 06:25:50 +000033#include <selinux/selinux.h> /* for setexeccon */
34#endif
35
Denis Vlasenkofad2b862007-05-31 22:16:38 +000036#if ENABLE_SELINUX
Denis Vlasenko797b4d22006-09-05 09:45:30 +000037static security_context_t current_sid;
Rob Landley60158cb2005-05-03 06:25:50 +000038
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +000039void FAST_FUNC renew_current_security_context(void)
Rob Landley60158cb2005-05-03 06:25:50 +000040{
Denis Vlasenko976690a2007-09-10 17:17:01 +000041 freecon(current_sid); /* Release old context */
Denis Vlasenko797b4d22006-09-05 09:45:30 +000042 getcon(&current_sid); /* update */
Rob Landley60158cb2005-05-03 06:25:50 +000043}
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +000044void FAST_FUNC set_current_security_context(security_context_t sid)
Rob Landley60158cb2005-05-03 06:25:50 +000045{
Denis Vlasenko976690a2007-09-10 17:17:01 +000046 freecon(current_sid); /* Release old context */
Denis Vlasenko797b4d22006-09-05 09:45:30 +000047 current_sid = sid;
Rob Landley60158cb2005-05-03 06:25:50 +000048}
49
Eric Andersen9e480452003-07-03 10:07:04 +000050#endif
Eric Andersen27f64e12002-06-23 04:24:25 +000051
52/* Run SHELL, or DEFAULT_SHELL if SHELL is empty.
53 If COMMAND is nonzero, pass it to the shell with the -c option.
54 If ADDITIONAL_ARGS is nonzero, pass it to the shell as more
55 arguments. */
56
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +000057void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command, const char **additional_args)
Eric Andersen27f64e12002-06-23 04:24:25 +000058{
59 const char **args;
60 int argno = 1;
61 int additional_args_cnt = 0;
Eric Andersenc7bda1c2004-03-15 08:29:22 +000062
Denis Vlasenko797b4d22006-09-05 09:45:30 +000063 for (args = additional_args; args && *args; args++)
Eric Andersen27f64e12002-06-23 04:24:25 +000064 additional_args_cnt++;
65
Denis Vlasenko797b4d22006-09-05 09:45:30 +000066 args = xmalloc(sizeof(char*) * (4 + additional_args_cnt));
Eric Andersenc7bda1c2004-03-15 08:29:22 +000067
Denis Vlasenko818322b2007-09-24 18:27:04 +000068 args[0] = bb_get_last_path_component_nostrip(xstrdup(shell));
Eric Andersenc7bda1c2004-03-15 08:29:22 +000069
Denis Vlasenko797b4d22006-09-05 09:45:30 +000070 if (loginshell)
71 args[0] = xasprintf("-%s", args[0]);
Eric Andersenc7bda1c2004-03-15 08:29:22 +000072
Denis Vlasenko797b4d22006-09-05 09:45:30 +000073 if (command) {
74 args[argno++] = "-c";
75 args[argno++] = command;
Eric Andersen27f64e12002-06-23 04:24:25 +000076 }
Denis Vlasenko797b4d22006-09-05 09:45:30 +000077 if (additional_args) {
78 for (; *additional_args; ++additional_args)
79 args[argno++] = *additional_args;
Eric Andersen27f64e12002-06-23 04:24:25 +000080 }
Denis Vlasenko797b4d22006-09-05 09:45:30 +000081 args[argno] = NULL;
Denis Vlasenkofad2b862007-05-31 22:16:38 +000082#if ENABLE_SELINUX
Denis Vlasenko976690a2007-09-10 17:17:01 +000083 if (current_sid)
84 setexeccon(current_sid);
85 if (ENABLE_FEATURE_CLEAN_UP)
Denis Vlasenko797b4d22006-09-05 09:45:30 +000086 freecon(current_sid);
Eric Andersen9e480452003-07-03 10:07:04 +000087#endif
Denis Vlasenko797b4d22006-09-05 09:45:30 +000088 execv(shell, (char **) args);
Denys Vlasenko6331cf02009-11-13 09:08:27 +010089 bb_perror_msg_and_die("can't run %s", shell);
Eric Andersen27f64e12002-06-23 04:24:25 +000090}