Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 1 | /* 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 Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 31 | #include "libbb.h" |
Denis Vlasenko | fad2b86 | 2007-05-31 22:16:38 +0000 | [diff] [blame^] | 32 | #if ENABLE_SELINUX |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 33 | #include <selinux/selinux.h> /* for setexeccon */ |
| 34 | #endif |
| 35 | |
Denis Vlasenko | fad2b86 | 2007-05-31 22:16:38 +0000 | [diff] [blame^] | 36 | #if ENABLE_SELINUX |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 37 | static security_context_t current_sid; |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 38 | |
| 39 | void |
| 40 | renew_current_security_context(void) |
| 41 | { |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 42 | if (current_sid) |
| 43 | freecon(current_sid); /* Release old context */ |
| 44 | getcon(¤t_sid); /* update */ |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 45 | } |
| 46 | void |
| 47 | set_current_security_context(security_context_t sid) |
| 48 | { |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 49 | if (current_sid) |
| 50 | freecon(current_sid); /* Release old context */ |
| 51 | current_sid = sid; |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 52 | } |
| 53 | |
Eric Andersen | 9e48045 | 2003-07-03 10:07:04 +0000 | [diff] [blame] | 54 | #endif |
Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 55 | |
| 56 | /* Run SHELL, or DEFAULT_SHELL if SHELL is empty. |
| 57 | If COMMAND is nonzero, pass it to the shell with the -c option. |
| 58 | If ADDITIONAL_ARGS is nonzero, pass it to the shell as more |
| 59 | arguments. */ |
| 60 | |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 61 | void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) |
Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 62 | { |
| 63 | const char **args; |
| 64 | int argno = 1; |
| 65 | int additional_args_cnt = 0; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 66 | |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 67 | for (args = additional_args; args && *args; args++) |
Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 68 | additional_args_cnt++; |
| 69 | |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 70 | args = xmalloc(sizeof(char*) * (4 + additional_args_cnt)); |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 71 | |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 72 | args[0] = bb_get_last_path_component(xstrdup(shell)); |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 73 | |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 74 | if (loginshell) |
| 75 | args[0] = xasprintf("-%s", args[0]); |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 76 | |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 77 | if (command) { |
| 78 | args[argno++] = "-c"; |
| 79 | args[argno++] = command; |
Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 80 | } |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 81 | if (additional_args) { |
| 82 | for (; *additional_args; ++additional_args) |
| 83 | args[argno++] = *additional_args; |
Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 84 | } |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 85 | args[argno] = NULL; |
Denis Vlasenko | fad2b86 | 2007-05-31 22:16:38 +0000 | [diff] [blame^] | 86 | #if ENABLE_SELINUX |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 87 | if (current_sid && !setexeccon(current_sid)) { |
| 88 | freecon(current_sid); |
| 89 | execve(shell, (char **) args, environ); |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 90 | } else |
Eric Andersen | 9e48045 | 2003-07-03 10:07:04 +0000 | [diff] [blame] | 91 | #endif |
Denis Vlasenko | 797b4d2 | 2006-09-05 09:45:30 +0000 | [diff] [blame] | 92 | execv(shell, (char **) args); |
| 93 | bb_perror_msg_and_die("cannot run %s", shell); |
Eric Andersen | 27f64e1 | 2002-06-23 04:24:25 +0000 | [diff] [blame] | 94 | } |